Company Subsidary API with Python

   

On this page:

• The Importance of Subsidiary Data
• Fetching & Visualizing Subsidiary Location Trends over Time
  • Pagination:
  • Crafting Queries with Lucene Syntax:
  • Understanding the Response:
• Visualizing Subsidiary Locations on a World Map

This guide demonstrates how you can leverage the Company Subsidiary API to find subsidiaries and their jurisdictions for a company.

Overview of the tutorial:

• How to fetch all of Tesla's subsidiaries since its IPO in 2010.
• Techniques to visualize the number of Tesla's subsidiaries across different geographical regions over time.
• Mapping Tesla's subsidiaries on a world map, using circle bubbles sized proportionally to the number of subsidiaries in each location.

The Subsidiary API at a glance:

• Retrieve all current and historical subsidiaries of a company using its ticker, CIK, or get information on subsidiaries of multiple companies.
• Obtain a list of subsidiaries for a company since a specific date.
• Extract subsidiary data from a specific Exhibit 21 file, for example attached to 10-K or 10-Q reports.

• Revenue Indicators & Growth Trends: A growing number of subsidiaries often signals future revenue growth. Setting up subsidiaries in new countries can indicate expansion into new markets.
• Diversified Revenue Streams: Geographically diverse subsidiaries can mean a company has multiple sources of revenue. This can protect the company from downturns in one specific market or region.
• Corporate Structure & Risk: Grasping the subsidiary network helps in understanding a company's structure, revealing potential risks in specific geographical regions and the company's exposure to them.
• New Market Dynamics: Are there trends unique to specific sectors or industries? For instance, do companies in a certain sector tend to establish subsidiaries in specific countries?
• Cost Management: Companies might establish subsidiaries in regions where operational costs, including labor and raw materials, are lower. This can provide insights into a company's cost management strategy.
• Identifying Market Leaders: The presence of multiple subsidiaries in a particular region can indicate which companies are market leaders there.
• M&A Insights: Recognizing patterns in subsidiary establishment can hint at potential mergers and acquisitions targets. Also, a sudden increase in subsidiaries in a particular region can hint at a company's M&A strategy.

Begin by installing the sec-api Python package. Once installed, initialize the SubsidiaryApi class using your API key. To retrieve the list of Tesla's subsidiaries since its 2010 IPO, we'll utilize the subsidiary_api.get_data(query) method.

!pip install -q sec-api

API_KEY = 'YOUR_API_KEY'

from sec_api import SubsidiaryApi

subsidiary_api = SubsidiaryApi(API_KEY)

To extract the desired data, we'll be crafting a query and feeding it to the subsidiary_api.get_data() method. Here's how it's done:

tsla_query = {
  "query": "ticker:TSLA",
  "from": "0",
  "size": "50",
  "sort": [ { "filedAt": { "order": "desc"  } } ]
}

tsla_subsidiaries = subsidiary_api.get_data(tsla_query)

The from and size parameters help in managing pagination. Specifically:

• from: Denotes the starting point. For instance, setting "from" to "50" would start fetching from the 51st record.
• size: Specifies the number of records to fetch per query, maxing out at 50.

If you want to retrieve more data beyond your initial fetch of 50 results, increase the "from" parameter by increments of 50. Note, the combined value of "from" and "size" can't exceed 10,000.

The query parameter uses the Lucene query syntax. This offers a versatile way to specify your search criteria. Examples include:

• ticker:TSLA AND filedAt:[2020-01-01 TO 2022-12-31]: This fetches subsidiaries of Tesla disclosed in filings between 2020 and 2022.
• ticker:(MSFT, AAPL, NVDA): This targets subsidiaries of Microsoft, Apple, and Nvidia.
• accessionNo:"0001564590-21-028714": This fetches subsidiaries from a specific Exhibit 21 file attached to the filing with the given accession number.

The data you receive is in JSON format, nested inside the data field of the response. Within this field, you'll find an array of subsidiary objects. Each object contains:

• id: A unique identifier.
• accessionNo: The accession number from the filing the data was extracted from.
• filedAt: The filing date.
• cik: The company's CIK.
• ticker: The company's ticker symbol.
• companyName: The company's name.
• subsidiaries: An array of subsidiary objects. Each of these has:
  • name: The subsidiary's name.
  • jurisdiction: The subsidiary's jurisdiction. This could be a US state (like Delaware) or a country (like China). However, note that not all subsidiaries will have a jurisdiction specified. Also, the jurisdictions are not standardized. For example, "UK" and "United Kingdom" are used by different companies.

print("Most recent TSLA subsidiary data:")
tsla_subsidiaries['data'][0]

Most recent TSLA subsidiary data:

{'id': '6838a63b29128e116bde65c885282667',
 'accessionNo': '0000950170-23-001409',
 'filedAt': '2023-01-30T21:29:15-05:00',
 'cik': '1318605',
 'ticker': 'TSLA',
 'companyName': 'Tesla, Inc.',
 'subsidiaries': [{'name': 'Alabama Service LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Allegheny Solar 1, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Allegheny Solar Manager 1, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Alset Transport GmbH', 'jurisdiction': 'Germany'},
  {'name': 'Alset Warehouse GmbH', 'jurisdiction': 'Germany'},
  {'name': 'Ancon Holdings II, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Ancon Holdings III, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Ancon Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Ancon Solar Corporation', 'jurisdiction': 'Delaware'},
  {'name': 'Ancon Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Ancon Solar II Lessee Manager, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Ancon Solar II Lessee, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Ancon Solar II Lessor, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Ancon Solar III Lessee Manager, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Ancon Solar III Lessee, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Ancon Solar III Lessor, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Ancon Solar Managing Member I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Arpad Solar Borrower, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Arpad Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Arpad Solar Manager I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'AU Solar 1, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'AU Solar 2, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Banyan SolarCity Manager 2010, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Banyan SolarCity Owner 2010, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Basking Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Basking Solar II, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Basking Solar Manager II, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Beatrix Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Bernese Solar Manager I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Blue Skies Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Blue Skies Solar II, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'BT Connolly Storage, LLC', 'jurisdiction': 'Texas'},
  {'name': 'Caballero Solar Managing Member I, LLC',
   'jurisdiction': 'Delaware'},
  {'name': 'Caballero Solar Managing Member II, LLC',
   'jurisdiction': 'Delaware'},
  {'name': 'Caballero Solar Managing Member III, LLC',
   'jurisdiction': 'Delaware'},
  {'name': 'Cardinal Blue Solar, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Castello Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Castello Solar II, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Castello Solar III, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Chaparral SREC Borrower, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Chaparral SREC Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Chompie Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Chompie Solar II, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Chompie Solar Manager I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Chompie Solar Manager II, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Clydesdale SC Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Colorado River Project, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Community Solar Partners, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Connecticut Auto Repair and Service LLC',
   'jurisdiction': 'Delaware'},
  {'name': 'Compass Automation Incorporated', 'jurisdiction': 'Illinois'},
  {'name': 'Dom Solar General Partner I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Dom Solar Lessor I, LP', 'jurisdiction': 'Cayman Islands'},
  {'name': 'Domino Solar Ltd.', 'jurisdiction': 'Cayman Islands'},
  {'name': 'Dom Solar Limited Partner I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Falconer Solar Manager I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Firehorn Solar I, LLC', 'jurisdiction': 'Cayman Islands'},
  {'name': 'Firehorn Solar Manager I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'FocalPoint Solar Borrower, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'FocalPoint Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'FocalPoint Solar Manager I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Fontane Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Fotovoltaica GI 4, S. de R.L. de C.V.', 'jurisdiction': 'Mexico'},
  {'name': 'Fotovoltaica GI 5, S. de R.L. de C.V.', 'jurisdiction': 'Mexico'},
  {'name': 'FP System Owner, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Giga Insurance Texas, Inc.', 'jurisdiction': 'Texas'},
  {'name': 'Giga Texas Energy, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Grohmann Engineering Trading (Shanghai) Co. Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Grohmann USA, Inc.', 'jurisdiction': 'Delaware'},
  {'name': 'Guilder Solar, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Hamilton Solar, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Hangzhou Silevo Electric Power Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Harpoon Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Harpoon Solar Manager I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Haymarket Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Haymarket Manager 1, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Haymarket Solar 1, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Hibar Systems Europe GmbH', 'jurisdiction': 'Germany'},
  {'name': 'Hive Battery Inc.', 'jurisdiction': 'Delaware'},
  {'name': 'Ikehu Manager I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'IL Buono Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Iliosson, S.A. de C.V.', 'jurisdiction': 'Mexico'},
  {'name': 'Industrial Maintenance Technologies, Inc.',
   'jurisdiction': 'California'},
  {'name': 'Kansas Repair LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Klamath Falls Solar 1, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Knight Solar Managing Member I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Knight Solar Managing Member II, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Knight Solar Managing Member III, LLC',
   'jurisdiction': 'Delaware'},
  {'name': 'Landlord 2008-A, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Louis Solar II, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Louis Solar III, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Louis Solar Manager II, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Louis Solar Manager III, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Louis Solar Master Tenant I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Louis Solar MT Manager I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Louis Solar Owner I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Louis Solar Owner Manager I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Master Tenant 2008-A, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Matterhorn Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Maxwell Holding GmbH', 'jurisdiction': 'Germany'},
  {'name': 'Maxwell Technologies GmbH', 'jurisdiction': 'Germany'},
  {'name': 'Maxwell Technologies, Inc.', 'jurisdiction': 'Delaware'},
  {'name': 'Megalodon Solar, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'MML Acquisition Corp.', 'jurisdiction': 'Delaware'},
  {'name': 'Monte Rosa Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar Manager V, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar Manager VI, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar Manager X, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar Manager XI, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar Manager XII, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar Master Tenant IX, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar Master Tenant V, LLC', 'jurisdiction': 'California'},
  {'name': 'Mound Solar Master Tenant VI, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar Master Tenant VII, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar Master Tenant VIII, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar MT Manager IX, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar MT Manager VII, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar MT Manager VIII, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar Owner IX, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar Owner Manager IX, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar Owner Manager VII, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar Owner Manager VIII, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar Owner V, LLC', 'jurisdiction': 'California'},
  {'name': 'Mound Solar Owner VI, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar Owner VII, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar Owner VIII, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar Partnership X, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar Partnership XI, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Mound Solar Partnership XII, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'MS SolarCity 2008, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'MS SolarCity Commercial 2008, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'MS SolarCity Residential 2008, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'New Mexico Sales and Vehicle Service LLC',
   'jurisdiction': 'Delaware'},
  {'name': 'NBA SolarCity AFB, LLC', 'jurisdiction': 'California'},
  {'name': 'NBA SolarCity Commercial I, LLC', 'jurisdiction': 'California'},
  {'name': 'NBA SolarCity Solar Phoenix, LLC', 'jurisdiction': 'California'},
  {'name': 'Northern Nevada Research Co., LLC', 'jurisdiction': 'Nevada'},
  {'name': 'Orange Vehicle Sales LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Oranje Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Oranje Solar Manager I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Paramount Energy Fund I Lessee, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Paramount Energy Fund I Lessor, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'PEF I MM, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Perbix Machine Company, Inc.', 'jurisdiction': 'Minnesota'},
  {'name': 'Presidio Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Presidio Solar II, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Presidio Solar III, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Pukana La Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'R9 Solar 1, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Roadster Automobile Sales and Service (Beijing) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Roadster Finland Oy', 'jurisdiction': 'Finland'},
  {'name': 'SA VPP Holding Trust', 'jurisdiction': 'Australia'},
  {'name': 'SA VPP Project Trust', 'jurisdiction': 'Australia'},
  {'name': 'Sequoia Pacific Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Sequoia Pacific Manager I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Sequoia Pacific Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Sequoia SolarCity Owner I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Sierra Solar Power (Hong Kong) Limited',
   'jurisdiction': 'Hong Kong'},
  {'name': 'SiiLion, Inc.', 'jurisdiction': 'Delaware'},
  {'name': 'Silevo, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Shoreline Vehicle Sales LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Aquarium Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Energy of America 1, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Energy of America Manager 1, LLC',
   'jurisdiction': 'Delaware'},
  {'name': 'Solar Explorer, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Gezellig Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar House I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar House II, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar House III, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar House IV, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Integrated Fund I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Integrated Fund II, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Integrated Fund III, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Integrated Fund IV-A, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Integrated Fund V, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Integrated Fund VI, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Integrated Manager I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Integrated Manager II, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Integrated Manager III, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Integrated Manager IV-A, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Integrated Manager V, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Integrated Manager VI, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Services Company, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Ulysses Manager I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Ulysses Manager II, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Voyager, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Warehouse Manager I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Warehouse Manager II, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Warehouse Manager III, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Solar Warehouse Manager IV, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Alpine Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Amphitheatre Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Arbor Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Arches Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity AU Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Cruyff Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Electrical, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Electrical New York Corporation',
   'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Finance Company, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Finance Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Foxborough Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity FTE Series 1, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity FTE Series 2, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Fund Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Grand Canyon Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Holdings 2008, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity International, Inc.', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Leviathan Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity LMC Series I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity LMC Series II, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity LMC Series III, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity LMC Series IV, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity LMC Series V, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Mid-Atlantic Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Nitro Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Orange Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Series Holdings I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Series Holdings II, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Series Holdings IV, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Steep Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Ulu Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarCity Village Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarRock, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SolarStrong, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Sparrowhawk Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'SREC Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'TALT Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'TALT TBM Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'TBM Partnership II, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'TEO Engineering, Inc.', 'jurisdiction': 'California'},
  {'name': 'TES 2017-1, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'TES 2017-2, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'TES Holdings 2017-1, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla 2014 Warehouse SPV LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla Auto Lease Trust 2019-A', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla Auto Lease Trust 2020-A', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla Auto Lease Trust 2021-A', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla Auto Lease Trust 2021-B', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla Auto Lease Trust 2022-A', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla Automation GmbH', 'jurisdiction': 'Germany'},
  {'name': 'Tesla Automobile Information Service (Dalian) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Management and Service (Haikou) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Beijing) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Changchun) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Changsha) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Chengdu) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Chongqing) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Dalian) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Fuzhou) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Guangzhou) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Guiyang) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Haerbin) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Hangzhou) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Hefei) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Hohhot) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Jinan) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Kunming) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Lanzhou) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Nanchang) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Nanjing) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Nanning) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Ningbo) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Qingdao) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Shanghai) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Shenyang) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Shijiazhuang) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Suzhou) Co. Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Taiyuan) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Tianjin) Co. Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Urumqi) Co. Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Wenzhou) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Wuhan) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': "Tesla Automobile Sales and Service (Xi'an) Co., Ltd.",
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Xiamen) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Yinchuan) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobile Sales and Service (Zhengzhou) Co. Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Automobiles Sales and Service Mexico, S. de R.L. de C.V.',
   'jurisdiction': 'Mexico'},
  {'name': 'Tesla (Beijing) New Energy R&D Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Belgium BV', 'jurisdiction': 'Belgium'},
  {'name': 'Tesla Canada Finance ULC', 'jurisdiction': 'Canada'},
  {'name': 'Tesla Canada GP Inc.', 'jurisdiction': 'Canada'},
  {'name': 'Tesla Canada LP', 'jurisdiction': 'Canada'},
  {'name': 'Tesla Charging, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla Construction (Shanghai) Co., Ltd.', 'jurisdiction': 'China'},
  {'name': 'Tesla Czech Republic s.r.o.', 'jurisdiction': 'Czech Republic'},
  {'name': 'Tesla Energia Macau Limitada', 'jurisdiction': 'Macau'},
  {'name': 'Tesla Energy d.o.o.', 'jurisdiction': 'Slovenia'},
  {'name': 'Tesla Energy Management LLC', 'jurisdiction': ''},
  {'name': 'Tesla Energy Operations, Inc.', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla Finance LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla Financial Leasing (China) Co., Ltd.',
   'jurisdiction': 'China'},
  {'name': 'Tesla Financial Services GmbH', 'jurisdiction': 'Germany'},
  {'name': 'Tesla Financial Services Holdings B.V.',
   'jurisdiction': 'Netherlands'},
  {'name': 'Tesla Financial Services Limited',
   'jurisdiction': 'United Kingdom'},
  {'name': 'Tesla France S.à r.l.', 'jurisdiction': 'France'},
  {'name': 'Tesla Germany GmbH', 'jurisdiction': 'Germany'},
  {'name': 'Tesla General Insurance, Inc.', 'jurisdiction': 'Arizona'},
  {'name': 'Tesla Greece Single Member P.C.', 'jurisdiction': 'Greece'},
  {'name': 'Tesla Hrvatska d.o.o.', 'jurisdiction': 'Croatia'},
  {'name': 'Tesla Hungary Kft.', 'jurisdiction': 'Hungary'},
  {'name': 'Tesla India Motors and Energy Private Limited',
   'jurisdiction': 'India'},
  {'name': 'Tesla Insurance Brokers Co., Ltd.', 'jurisdiction': 'China'},
  {'name': 'Tesla Insurance Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla Insurance, Inc.', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla Insurance Ltd.', 'jurisdiction': 'Malta'},
  {'name': 'Tesla Insurance Company', 'jurisdiction': 'California'},
  {'name': 'Tesla Insurance Services, Inc.', 'jurisdiction': 'California'},
  {'name': 'Tesla Insurance Services of Texas, Inc.', 'jurisdiction': 'Texas'},
  {'name': 'Tesla International B.V.', 'jurisdiction': 'Netherlands'},
  {'name': 'Tesla Investments LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla Italy S.r.l.', 'jurisdiction': 'Italy'},
  {'name': 'Tesla Jordan Car Trading LLC', 'jurisdiction': 'Jordan'},
  {'name': 'Tesla Korea Limited', 'jurisdiction': 'Republic of Korea'},
  {'name': 'Tesla Lease Trust', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla Manufacturing Brandenburg SE', 'jurisdiction': 'Germany'},
  {'name': 'Tesla Michigan, Inc.', 'jurisdiction': 'Michigan'},
  {'name': 'Tesla Mississippi LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla Motors Australia, Pty Ltd', 'jurisdiction': 'Australia'},
  {'name': 'Tesla Motors Austria GmbH', 'jurisdiction': 'Austria'},
  {'name': 'Tesla Motors (Beijing) Co., Ltd.', 'jurisdiction': 'China'},
  {'name': 'Tesla Motors Canada ULC', 'jurisdiction': 'Canada'},
  {'name': 'Tesla Motors Coöperatief U.A.', 'jurisdiction': 'Netherlands'},
  {'name': 'Tesla Motors Denmark ApS', 'jurisdiction': 'Denmark'},
  {'name': 'Tesla Motors FL, Inc.', 'jurisdiction': 'Florida'},
  {'name': 'Tesla Motors HK Limited', 'jurisdiction': 'Hong Kong'},
  {'name': 'Tesla Motors Iceland ehf.', 'jurisdiction': 'Iceland'},
  {'name': 'Tesla Motors Ireland Limited', 'jurisdiction': 'Ireland'},
  {'name': 'Tesla Motors Israel Ltd.', 'jurisdiction': 'Israel'},
  {'name': 'Tesla Motors Japan GK', 'jurisdiction': 'Japan'},
  {'name': 'Tesla Motors Limited', 'jurisdiction': 'United Kingdom'},
  {'name': 'Tesla Motors Luxembourg S.à r.l.', 'jurisdiction': 'Luxembourg'},
  {'name': 'Tesla Motors MA, Inc.', 'jurisdiction': 'Massachusetts'},
  {'name': 'Tesla Motors Netherlands B.V.', 'jurisdiction': 'Netherlands'},
  {'name': 'Tesla Motors New York LLC', 'jurisdiction': 'New York'},
  {'name': 'Tesla Motors NL LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla Motors NV, Inc.', 'jurisdiction': 'Nevada'},
  {'name': 'Tesla Motors PA, Inc.', 'jurisdiction': 'Pennsylvania'},
  {'name': 'Tesla Motors Romania S.R.L.', 'jurisdiction': 'Romania'},
  {'name': 'Tesla Motors Sales and Service LLC', 'jurisdiction': 'Turkey'},
  {'name': 'Tesla Motors Singapore Holdings Pte. Ltd.',
   'jurisdiction': 'Singapore'},
  {'name': 'Tesla Motors Singapore Private Limited',
   'jurisdiction': 'Singapore'},
  {'name': 'Tesla Motors Stichting', 'jurisdiction': 'Netherlands'},
  {'name': 'Tesla Motors Taiwan Limited', 'jurisdiction': 'Taiwan'},
  {'name': 'Tesla Motors TN, Inc.', 'jurisdiction': 'Tennessee'},
  {'name': 'Tesla Motors TX, Inc.', 'jurisdiction': 'Texas'},
  {'name': 'Tesla Motors UT, Inc.', 'jurisdiction': 'Utah'},
  {'name': 'Tesla Nambe LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla New Zealand ULC', 'jurisdiction': 'New Zealand'},
  {'name': 'Tesla Norway AS', 'jurisdiction': 'Norway'},
  {'name': 'Tesla Poland sp. z o.o.', 'jurisdiction': 'Poland'},
  {'name': 'Tesla Property &Casualty, Inc.', 'jurisdiction': 'California'},
  {'name': 'Tesla Portugal, Sociedade Unipessoal LDA',
   'jurisdiction': 'Portugal'},
  {'name': 'Tesla Puerto Rico LLC', 'jurisdiction': 'Puerto Rico'},
  {'name': 'Tesla Pumps (Ningbo) Co.,LTD (fka: Hibar China Co. Ltd.)',
   'jurisdiction': 'China'},
  {'name': 'Tesla Pumps Seoul Ltd.', 'jurisdiction': 'Republic of Korea'},
  {'name': 'Tesla Sales, Inc.', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla Sdn. Bhd.', 'jurisdiction': 'Malaysia'},
  {'name': 'Tesla Shanghai Co., Ltd', 'jurisdiction': 'China'},
  {'name': 'Tesla Spain, S.L. Unipersonal', 'jurisdiction': 'Spain'},
  {'name': 'Tesla Switzerland GmbH', 'jurisdiction': 'Switzerland'},
  {'name': 'Tesla (Thailand) Ltd.', 'jurisdiction': 'Thailand'},
  {'name': 'Tesla TH1 LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Tesla TH2 LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Telsa Toronto Automation ULC', 'jurisdiction': 'Canada'},
  {'name': 'Tesla Toronto International Holdings ULC',
   'jurisdiction': 'Canada'},
  {'name': 'Tesla Transport B.V.', 'jurisdiction': 'Netherlands'},
  {'name': 'The Big Green Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'The Big Green Solar Manager I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Three Rivers Solar 1, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Three Rivers Solar 2, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Three Rivers Solar 3, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Three Rivers Solar Manager 1, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Three Rivers Solar Manager 2, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Three Rivers Solar Manager 3, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'TM International C.V.', 'jurisdiction': 'Netherlands'},
  {'name': 'TM Sweden AB', 'jurisdiction': 'Sweden'},
  {'name': 'USB SolarCity Manager IV, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'USB SolarCity Master Tenant IV, LLC',
   'jurisdiction': 'California'},
  {'name': 'USB SolarCity Owner IV, LLC', 'jurisdiction': 'California'},
  {'name': 'Visigoth Solar 1, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Visigoth Solar Holdings, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Visigoth Solar Managing Member 1, LLC',
   'jurisdiction': 'Delaware'},
  {'name': 'VPP Project 1 (SA) Pty Ltd.', 'jurisdiction': 'Australia'},
  {'name': 'Weisshorn Solar I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Weisshorn Solar Manager I, LLC', 'jurisdiction': 'Delaware'},
  {'name': 'Zep Solar LLC', 'jurisdiction': 'California'}]}

Next, we'll transform the JSON response into a Pandas dataframe. During this process, we'll make a few optimizations:

1. Dropping Unnecessary Columns: We'll remove the id and companyName columns, as they won't be utilized in our subsequent analysis.
2. Expanding the subsidiaries Column: This column, which contains arrays of subsidiary data, will be 'exploded' into individual rows, ensuring each subsidiary occupies its own row.
3. Extracting Subsidiary Details: From the exploded subsidiaries column, we'll create two new columns: name and jurisdiction. These columns will hold the respective name and jurisdiction data for each subsidiary.
4. Cleaning Up: After the above transformations, we'll discard the original subsidiaries column to maintain a tidy dataframe.

import pandas as pd

tsla_subsidiaries_df = pd.DataFrame(tsla_subsidiaries['data'])
# drop columns: id, companyName
tsla_subsidiaries_df = tsla_subsidiaries_df.drop(['id', 'companyName'], axis=1)
# explode subsidiaries column
tsla_subsidiaries_df = tsla_subsidiaries_df.explode('subsidiaries')
# explode subsidiaries column to new "name" and "jurisdiction" columns
tsla_subsidiaries_df[['name', 'jurisdiction']] = tsla_subsidiaries_df['subsidiaries'].apply(pd.Series)
# drop subsidiaries column
tsla_subsidiaries_df = tsla_subsidiaries_df.drop(['subsidiaries'], axis=1)

print("All TSLA subsidiaries since its IPO in 2010:")
tsla_subsidiaries_df

All TSLA subsidiaries since its IPO in 2010:

	accessionNo	filedAt	cik	ticker	name	jurisdiction
0	0000950170-23-001409	2023-01-30T21:29:15-05:00	1318605	TSLA	Alabama Service LLC	Delaware
0	0000950170-23-001409	2023-01-30T21:29:15-05:00	1318605	TSLA	Allegheny Solar 1, LLC	Delaware
0	0000950170-23-001409	2023-01-30T21:29:15-05:00	1318605	TSLA	Allegheny Solar Manager 1, LLC	Delaware
0	0000950170-23-001409	2023-01-30T21:29:15-05:00	1318605	TSLA	Alset Transport GmbH	Germany
0	0000950170-23-001409	2023-01-30T21:29:15-05:00	1318605	TSLA	Alset Warehouse GmbH	Germany
...	...	...	...	...	...	...
9	0001193125-10-129878	2010-05-27T06:07:36-04:00	1318605	TSLA	Tesla Motors Australia, Pty Ltd.	Australia
9	0001193125-10-129878	2010-05-27T06:07:36-04:00	1318605	TSLA	Tesla Motors Japan K.K.	Japan
9	0001193125-10-129878	2010-05-27T06:07:36-04:00	1318605	TSLA	Tesla Motors HK Limited	Hong Kong
9	0001193125-10-129878	2010-05-27T06:07:36-04:00	1318605	TSLA	Tesla Motors Italy S.r.l.	Italy
9	0001193125-10-129878	2010-05-27T06:07:36-04:00	1318605	TSLA	Tesla Motors Singapore Private Limited	Singapore

2583 rows × 6 columns

print("Unique reporting dates:", tsla_subsidiaries_df['filedAt'].nunique(), "\n", tsla_subsidiaries_df['filedAt'].unique())
print("Unique juristdictions:", tsla_subsidiaries_df['jurisdiction'].nunique(), "\n", tsla_subsidiaries_df['jurisdiction'].sort_values().unique())

Unique reporting dates: 10 
 ['2023-01-30T21:29:15-05:00' '2022-02-04T20:11:27-05:00'
 '2021-02-08T07:27:23-05:00' '2020-02-13T07:12:18-05:00'
 '2019-02-19T06:10:16-05:00' '2018-02-23T06:07:43-05:00'
 '2017-03-01T16:54:21-05:00' '2016-02-24T16:17:56-05:00'
 '2011-03-03T14:47:36-05:00' '2010-05-27T06:07:36-04:00']
Unique juristdictions: 67 
 ['' 'Arizona' 'Australia' 'Austria' 'Belgium' 'California' 'Canada'
 'Cayman' 'Cayman Islands' 'China' 'Croatia' 'Czech Republic' 'Delaware'
 'Delware' 'Denmark' 'Finland' 'Florida' 'France' 'Germany' 'Greece'
 'Guam' 'Hong Kong' 'Hungary' 'Iceland' 'Illinois' 'India' 'Ireland'
 'Israel' 'Italy' 'Japan' 'Jordan' 'Luxembourg' 'Macau' 'Malaysia' 'Malta'
 'Massachusetts' 'Mexico' 'Michigan' 'Minnesota' 'Monaco' 'Netherlands'
 'Nevada' 'New York' 'New Zealand' 'Norway' 'Ontario' 'Pennsylvania'
 'Poland' 'Portugal' 'Puerto Rico' 'Republic of Korea' 'Romania'
 'Singapore' 'Slovenia' 'South Korea' 'Spain' 'Sweden' 'Switzerland'
 'Taiwan' 'Tennessee' 'Texas' 'Thailand' 'Turkey' 'UK' 'United Kingdom'
 'United States' 'Utah']

Our dataset is spanning 10 unique reporting periods. These periods include the years from 2016 to 2023, as well as 2010 and 2011. If you're wondering about the gap between 2012 and 2015, Tesla did not report any subsidiaries in their EDGAR filings during this window, which explains their absence in our dataset.

Diving into jurisdictions, our data captures subsidiaries in 62 distinct regions. These include jurisdictions such as Delaware, California, China, and Germany. Note, that "Delaware" and "Delware", "UK" and "United Kingdom", "Republic of Korea" and "South Korea" as well as "Cayman" and "Cayman Islands" are considered the same jurisdictions, and that we have to standardize them before we can analyze the data.

replace_jurisdictions = {
    'Delware': 'Delaware',
    'UK': 'United Kingdom',
    'Cayman': 'Cayman Islands',
    'South Korea': 'Republic of Korea'
}
tsla_subsidiaries_df['jurisdiction'] = tsla_subsidiaries_df['jurisdiction'].replace(replace_jurisdictions)

For a closer look at recent trends, we'll spotlight the top 10 jurisdictions with the highest concentration of Tesla subsidiaries in 2022.

print("Top 10 Regions with the most Tesla Subsidiaries in 2022:")
top_locations_2022 = pd.DataFrame(tsla_subsidiaries_df[tsla_subsidiaries_df['filedAt'].str.contains('2022-')]['jurisdiction'].value_counts())
top_locations_2022.head(10)

Top 10 Regions with the most Tesla Subsidiaries in 2022:

	count
jurisdiction
Delaware	237
China	45
California	11
Germany	7
Netherlands	7
Canada	6
Australia	4
Mexico	4
Cayman Islands	3
Texas	3

# count number of subsidiaries per year
tsla_subsidiaries_df['year'] = tsla_subsidiaries_df['filedAt'].str[:4]
# group by year, name, jurisdiction and count number of subsidiaries
tsla_grouped = tsla_subsidiaries_df.groupby(['year', 'name', 'jurisdiction']).size().reset_index(name='count')
# group by year and jurisdiction and count number of subsidiaries
tsla_subs_juri_year = tsla_grouped.groupby(['year', 'jurisdiction']).size().reset_index(name='count')

# create pivot table
tsla_subs_juri_year_pivot = tsla_subs_juri_year.pivot(index='year', columns='jurisdiction', values='count')
tsla_subs_juri_year_pivot

jurisdiction		Arizona	Australia	Austria	Belgium	California	Canada	Cayman Islands	China	Croatia	...	Sweden	Switzerland	Taiwan	Tennessee	Texas	Thailand	Turkey	United Kingdom	United States	Utah
year
2010	1.0	NaN	1.0	NaN	NaN	NaN	NaN	NaN	NaN	NaN	...	NaN	1.0	1.0	NaN	NaN	NaN	NaN	1.0	NaN	NaN
2011	NaN	NaN	1.0	NaN	NaN	NaN	1.0	NaN	NaN	NaN	...	NaN	1.0	1.0	NaN	NaN	NaN	NaN	1.0	2.0	NaN
2016	NaN	NaN	1.0	1.0	1.0	NaN	1.0	NaN	12.0	NaN	...	1.0	1.0	NaN	1.0	1.0	NaN	NaN	2.0	NaN	1.0
2017	NaN	1.0	2.0	1.0	1.0	14.0	5.0	3.0	15.0	NaN	...	1.0	1.0	1.0	1.0	1.0	NaN	NaN	3.0	NaN	1.0
2018	NaN	NaN	1.0	1.0	1.0	14.0	3.0	NaN	18.0	NaN	...	1.0	1.0	1.0	1.0	1.0	NaN	1.0	2.0	NaN	1.0
2019	NaN	NaN	1.0	1.0	1.0	14.0	3.0	NaN	27.0	NaN	...	1.0	1.0	1.0	1.0	1.0	NaN	1.0	2.0	NaN	1.0
2020	NaN	NaN	2.0	1.0	1.0	15.0	5.0	NaN	35.0	NaN	...	1.0	1.0	1.0	1.0	1.0	NaN	1.0	2.0	NaN	1.0
2021	NaN	NaN	4.0	1.0	1.0	12.0	5.0	3.0	45.0	1.0	...	1.0	1.0	1.0	1.0	2.0	NaN	1.0	2.0	NaN	1.0
2022	1.0	NaN	4.0	1.0	1.0	11.0	6.0	3.0	45.0	1.0	...	1.0	1.0	1.0	1.0	3.0	NaN	1.0	2.0	NaN	1.0
2023	1.0	1.0	4.0	1.0	1.0	13.0	6.0	3.0	46.0	1.0	...	1.0	1.0	1.0	1.0	4.0	1.0	1.0	2.0	NaN	1.0

10 rows × 63 columns

top_10_locations = top_locations_2022.head(10).index.tolist()

import matplotlib.pyplot as plt

# plot tsla_subs_juri_year_pivot for top 10 locations
tsla_subs_juri_year_pivot[top_10_locations].plot(kind='bar', stacked=True, figsize=(5, 4))
plt.title("Top 10 Subsidiaries per Jurisdiction for Tesla")
plt.ylabel("Subsidiares"), plt.xlabel("Year"), plt.tight_layout()
ax = plt.gca()
handles, labels = ax.get_legend_handles_labels()
ax.legend(reversed(handles), reversed(labels), loc='center left', bbox_to_anchor=(1, 0.5), fontsize=8)
ax.grid(), ax.set_axisbelow(True)
plt.setp(ax.get_xticklabels(), rotation=50, ha="right", rotation_mode="anchor")
plt.show()

tsla_subs_juri_year_pivot[top_10_locations[1:]].plot(figsize=(5, 4))
plt.title("Top 10 Subsidiaries per Jurisdiction for Tesla")
plt.ylabel("Subsidiares"), plt.xlabel("Year"), plt.tight_layout()
ax = plt.gca()
handles, labels = ax.get_legend_handles_labels()
ax.legend(reversed(handles), reversed(labels), loc='center left', bbox_to_anchor=(1, 0.5), fontsize=8)
ax.grid(), ax.set_axisbelow(True)
plt.xticks(range(len(tsla_subs_juri_year_pivot.index)), tsla_subs_juri_year_pivot.index)
plt.setp(ax.get_xticklabels(), rotation=50, ha="right", rotation_mode="anchor")
plt.show()

In this section, we chart the global locations of Telsa's subsidiaries reported in 2022 on a world map.

Our dataset contains many location names, with the majority representing countries and a handful denoting US states. However, it's vital to understand that these jurisdictions aren't universally standardized. For instance, while one filer might denote a location as "United Kingdom", another might simply use "UK". Although we streamlined Tesla's jurisdictions in the previous section, this method isn't always feasible on a larger scale.

One of the primary challenges we face is translating these location names into precise geographical coordinates. For instance, how do we pinpoint a country like China to its latitude and longitude, say (35, 105)? Our solution is the GeoNames database, an extensive resource that catalogues a vast array of geographical entities, from countries and states to cities, and pairs them with their respective coordinates.

For the purpose of this tutorial, we'll walk you through the manual download and processing of the GeoNames database. This hands-on approach ensures a thorough understanding of the mapping process. However, for those looking for a more streamlined solution, the geonamescache Python package offers direct access to this database. Do bear in mind that the allCountries.zip file from GeoNames is quite large, weighing in at 1.5GB and encompassing over 12 million rows.

Once we've added the coordinates of all jurisdictions to our dataset, we'll visualize Tesla's global footprint on a world map using the plotly Python package.

The first step involves downloading the allCountries.zip file from GeoNames database and unzipping it. The database is a tab-separated file with, among others, the following columns:

• geonameid - integer id of record
• name - name of geographical point
• asciiname - name of geographical point in plain ascii characters
• latitude - latitude in decimal degrees
• longitude - longitude in decimal degrees
• feature class - categorization of the geographic feature, see codes for more info
• feature code - detailed description within the feature class, see codes for more info
• country code - ISO-3166 2-letter country code
• population - population of geographical point

# set to path to GeoNames database file
geonames_db_file = '/Users/jan/Downloads/allCountries.txt'

# load first three lines GeoNames database file into pandas dataframe
import pandas as pd

df = pd.read_csv(geonames_db_file, sep='\t', nrows=3, header=None)
df

	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
0	2986043	Pic de Font Blanca	Pic de Font Blanca	Pic de Font Blanca,Pic du Port	42.64991	1.53335	T	PK	AD	NaN	0	NaN	NaN	NaN	0	NaN	2860	Europe/Andorra	2014-11-05
1	2994701	Roc Mélé	Roc Mele	Roc Mele,Roc Meler,Roc Mélé	42.58765	1.74028	T	MT	AD	AD,FR	0	NaN	NaN	NaN	0	NaN	2803	Europe/Andorra	2020-06-10
2	3007683	Pic des Langounelles	Pic des Langounelles	Pic des Langounelles	42.61203	1.47364	T	PK	AD	AD,FR	0	NaN	NaN	NaN	0	NaN	2685	Europe/Andorra	2014-11-05

Given the extensive size of GeoNames database, it's crucial to optimize our workflow. To achieve this:

1. Selective Loading: We'll load only a subset of all available columns into the Pandas dataframe named all_locations.
2. Filtering by Feature Class: We'll narrow down our geo dataset to include rows where the feature_class is either:
   • P (representing cities, villages, etc.) or
   • A (indicating larger geographical entities like countries, states, or regions).
3. Creating Specific Dataframes for Efficient Retrieval:
   • countries_only: This dataframe is tailored to quickly fetch country coordinates. It exclusively houses rows where the feature_code is PCLI.
   • us_only: Specifically for US data, this dataframe filters rows by the country_code set to US, enabling fast lookups of US state coordinates.

Without these optimizations, the process of assigning coordinates to our subsidiaries could be painstakingly slow, potentially taking between 10 to 20 minutes. And when iterating for testing, the duration would only increase.

# load the geonames data (considering only the needed columns for simplicity)
all_locations = pd.read_csv(geonames_db_file,
                            sep='\t',
                            header=None,
                            names=['geonameid', 'name', 'asciiname', 'latitude', 'longitude', 'feature_class', 'feature_code', 'country_code', 'population'],
                            usecols=[0, 1, 2, 4, 5, 6, 7, 8, 14],
                            dtype=str)
# remove all rows with feature_class that are irrelevant for our use case, e.g. 'H' (e.g. lakes) 'L' (e.g. parks)
all_locations = all_locations[all_locations['feature_class'].isin(['A', 'P'])]
all_locations['population'] = all_locations['population'].astype(int)
all_locations['asciiname_lower'] = all_locations['asciiname'].str.lower()
all_locations['asciiname_lower'] = all_locations['asciiname_lower'].fillna('')
# countries_only
countries_only = all_locations[all_locations['feature_code'] == 'PCLI']
# US only
us_only = all_locations[(all_locations['country_code'] == 'US') &
                        (all_locations['feature_class'] == 'A') &
                        (all_locations['feature_code'] == 'ADM1')]

all_locations[(all_locations['feature_class'] == 'A') & (all_locations['name'].str.contains('Germany'))]

	geonameid	name	asciiname	latitude	longitude	feature_class	feature_code	country_code	population	asciiname_lower
2736783	2921044	Federal Republic of Germany	Federal Republic of Germany	51.5	10.5	A	PCLI	DE	82927922	federal republic of germany
10264230	4558181	Township of Germany	Township of Germany	39.7369	-77.10788	A	ADM3	US	0	township of germany
10734394	5039087	City of New Germany	City of New Germany	44.88361	-93.97083	A	ADM3	US	0	city of new germany
10734802	5039499	Township of North Germany	Township of North Germany	46.58651	-94.96762	A	ADM3	US	0	township of north germany

To translate a given jurisdiction into its respective coordinates, we'll deploy a multi-step approach:

1. Country Check: We first determine if the jurisdiction represents a country. If it does, we extract the coordinates from the countries_only dataframe.
2. US State Assumption: If the jurisdiction isn't a country, we treat it as a potential US state (like Texas) and look up its coordinates in the us_only dataframe.
3. General Lookup: For jurisdictions that aren't captured as countries or US states (e.g., Puerto Rico), we turn to the all_locations dataframe. Within this frame, we sort potential matches by population and select the coordinates of the most populous match.

However, it's essential to note that this method isn't flawless. Our matching mechanism, which uses a simple .contains check on lowercased versions of the jurisdiction and the asciiname from the GeoNames database, can occasionally misfire. For example, the abbreviation UK might erroneously match with Ukraine. To bolster accuracy, consider more advanced matching techniques like the Levenshtein distance. Alternatively, in a professional context, using APIs like Google's Geocoding API is the way to go. For the sake of this tutorial, we're prioritizing simplicity.

def get_lat_lon(place_name):
    place_data = countries_only[countries_only['asciiname_lower'].str.contains(place_name.lower())]

    if not place_data.empty:
        latitude = place_data.iloc[0]['latitude']
        longitude = place_data.iloc[0]['longitude']
        return latitude, longitude

    # look for locations in the US only
    state_data = us_only[us_only['asciiname_lower'].str.contains(place_name.lower())]

    if not state_data.empty:
        latitude = state_data.iloc[0]['latitude']
        longitude = state_data.iloc[0]['longitude']
        return latitude, longitude

    print(place_name, "- no location found in countries and US states, looking in all locations now.")

    # look for matches in all_locations
    all_data = all_locations[all_locations['asciiname_lower'].str.contains(place_name.lower())]

    if not all_data.empty:
        all_data = all_data.sort_values(by='population', ascending=False)
        latitude = all_data.iloc[0]['latitude']
        longitude = all_data.iloc[0]['longitude']
        return latitude, longitude

    return None, None

print(f"Delaware latitude & longitude: {get_lat_lon('Delaware')}")
print(f"Germany latitude & longitude: {get_lat_lon('Germany')}")
print(f"China latitude & longitude: {get_lat_lon('China')}")
print(f"Republic of Korea latitude & longitude: {get_lat_lon('Republic of Korea')}") # South Korea is not in the database
print(f"UK latitude & longitude: {get_lat_lon('UK')}") # false positive with Ukraine
print(f"United Kingdom latitude & longitude: {get_lat_lon('United Kingdom')}")

Delaware latitude & longitude: ('39.00039', '-75.49992')
Germany latitude & longitude: ('51.5', '10.5')
China latitude & longitude: ('35', '105')
Republic of Korea latitude & longitude: ('40', '127')
UK latitude & longitude: ('49', '32')
United Kingdom latitude & longitude: ('54.75844', '-2.69531')

print(f"Cayman Islands latitude & longitude: {get_lat_lon('Cayman Islands')}")

Cayman Islands - no location found in countries and US states, looking in all locations now.
Cayman Islands latitude & longitude: ('19.5', '-80.66667')

view_2022 = tsla_subsidiaries_df['filedAt'].str.contains('2022')
subs_2022 = tsla_subsidiaries_df[view_2022]
# count number of names grouped by jurisdiction
subs_2022_count = subs_2022.groupby('jurisdiction').count()['name'].sort_values(ascending=False)
# convert subs_2022_count to dataframe with columns jurisdiction and count
subs_2022_count = subs_2022_count.reset_index(name='count')

subs_2022_count.head()

	jurisdiction	count
0	Delaware	237
1	China	45
2	California	11
3	Germany	7
4	Netherlands	7

The GeoNames database occasionally uses unique naming conventions for countries. For instance, instead of the commonly used "Italy," the database lists it as the "Italian Republic." To address this, we manually map such jurisdiction names from our dataset to their corresponding labels in GeoNames. The mappings are as follows:

geoname_mappings = {
    'Czech Republic': 'Czechia',
    'Italy': 'Italian Republic',
    'Portugal': 'Portuguese Republic'
}

subs_2022_count['jurisdiction'] = subs_2022_count['jurisdiction'].replace(geoname_mappings)

subs_2022_count['Lat-Long'] = subs_2022_count['jurisdiction'].apply(lambda x: get_lat_lon(x))
subs_2022_count['Latitude'] = subs_2022_count['Lat-Long'].apply(lambda x: x[0] if x else None)
subs_2022_count['Longitude'] = subs_2022_count['Lat-Long'].apply(lambda x: x[1] if x else None)

Hong Kong - no location found in countries and US states, looking in all locations now.
Cayman Islands - no location found in countries and US states, looking in all locations now.
Greece - no location found in countries and US states, looking in all locations now.
Macau - no location found in countries and US states, looking in all locations now.
Puerto Rico - no location found in countries and US states, looking in all locations now.

subs_2022_count.head()

	jurisdiction	count	Lat-Long	Latitude	Longitude
0	Delaware	237	(39.00039, -75.49992)	39.00039	-75.49992
1	China	45	(35, 105)	35	105
2	California	11	(37.25022, -119.75126)	37.25022	-119.75126
3	Germany	7	(51.5, 10.5)	51.5	10.5
4	Netherlands	7	(52.25, 5.75)	52.25	5.75

With latitude and longitude values now assigned to each jurisdiction, we'll use plotly to visualize the subsidiary locations. On our world map, subsidiaries and their counts will be depicted as circles, providing an excellent spatial representation of their geographical distribution.

!pip install -q plotly

import plotly.express as px

fig = px.scatter_geo(subs_2022_count, lat="Latitude", lon="Longitude", size="count",
                     size_max=50,
                     hover_name="jurisdiction",
                     hover_data=["count"],
                     color="count",
                     color_continuous_scale=px.colors.sequential.Plasma)
fig.update_traces(marker=dict(line=dict(width=1, color='red'), color='red'))
fig.update_geos(projection_type="natural earth",
                landcolor="white",
                showocean=True, oceancolor="#aad3df",
                showcountries=True, countrycolor="lightgrey")
fig.update_layout(width=900, height=500, margin={"r":15,"t":0,"l":15,"b":0})
# show map as PNG, not interactive
fig.show(renderer="png")