Form U-9C-3 Files Dataset

The Form U-9C-3 Files Dataset is a closed historical archive of quarterly nonutility-activity reports filed with the SEC by registered public utility holding companies under Rule 58 of the Public Utility Holding Company Act of 1935 (PUHCA). One record is a single Form U-9C-3 or Form U-9C-3/A filing as it was submitted to EDGAR — identified by an 18-digit zero-padded accession number and packaging both the EDGAR submission metadata and the redistributed filing documents. Filers are the top-level registered holding companies that, with their subsidiaries, formed a "holding company system" subject to SEC structural regulation; operating utility subsidiaries do not file in their own right. Coverage begins 1997-08-01, when U-9C-3 became electronically filable, and ends with the form's retirement on February 8, 2006, when Title XII, Subtitle F of the Energy Policy Act of 2005 repealed PUHCA in full. The dataset is distributed in monthly ZIP containers and includes both U-9C-3 originals and U-9C-3/A amendments.

Dataset APIs

Dataset Files

What This Dataset Contains

Form U-9C-3 was the quarterly report required of registered public utility holding companies under Rule 58 of PUHCA, administered by the SEC's Division of Investment Management. Rule 58 carved out a category of "energy-related" and "gas-related" nonutility activities that registered holding companies could engage in without prior SEC approval, in exchange for ongoing quarterly disclosure on this form. The filing was due 60 days after each of the first three fiscal quarter-ends and 90 days after the fourth quarter-end, and was simultaneously delivered to the SEC and to every state commission with retail-rate jurisdiction over the system's utility subsidiaries.

The form's regulatory function was to make four things visible to regulators on a recurring basis: (i) the nonutility subsidiaries the registered system held during the quarter, (ii) any new nonutility securities issuances, capital contributions, or acquisitions that occurred during the quarter, (iii) intra-system service flows between the holding company and its associate companies, and (iv) the aggregate dollar magnitude of the system's energy-related and gas-related investment.

The form was discontinued effective February 8, 2006, when the Energy Policy Act of 2005 repealed PUHCA outright. Repeal terminated Rule 58 and the U-9C-3 reporting obligation in a single step, so no U-9C-3 filings exist for any reporting period after that date; the dataset's final population consists largely of late-filed amendments closing out earlier quarters. The dataset is distributed as monthly ZIP containers organized as form-u9c3-files/<YYYY>/<YYYY-MM>.zip, with redistributed filing documents in their native EDGAR formats (TXT, HTML, PDF) plus a per-record metadata.json.

Content Structure of a Single Record

What one record represents

One record in this dataset is a single Form U-9C-3 or Form U-9C-3/A filing as it was submitted to EDGAR, identified by an 18-digit zero-padded accession number. Each record packages two layers of content together: the EDGAR submission metadata for that accession, and the redistributed filing documents that the registered public utility holding company submitted as the body of the report.

The formType field distinguishes the two flavors of record. U-9C-3 is an original quarterly report covering one fiscal quarter. U-9C-3/A is an amendment that revises a previously filed U-9C-3 — typically to correct a numeric figure, attach an omitted exhibit, file a state-commission certificate that arrived after the original submission, or restate a confidential-treatment claim under Rule 104(b). Amendments share the same record schema and the same internal item structure as originals; they overlay or replace specific portions of a prior accession's content rather than constituting a wholly different document type.

Container layout and the unit of a record

Records are distributed inside monthly ZIP containers organized as form-u9c3-files/<YYYY>/<YYYY-MM>.zip. Decompressing one ZIP yields a single year-month directory, inside which each filing is its own subfolder named with the 18-digit zero-padded EDGAR accession number (no hyphens). The accession folder is the atomic record: it bundles a metadata.json describing the filing's EDGAR header and document manifest with the actual filing documents EDGAR distributed for that accession.

Filing volume tracks the form's quarterly cadence. Months immediately following each fiscal-quarter close — typically February, May, August, and November — are the dense months, while off-quarter months hold only stragglers and amendments. As a result, individual monthly containers vary widely in size, from single-record months at the late wind-down of the regime to multi-megabyte months at the height of PUHCA-era reporting.

Per-record file set

Inside one accession folder there are two kinds of content:

1. metadata.json — a single JSON object describing the EDGAR filing header, the filer entity (or entities), and the manifest of every document that was part of the original EDGAR submission.
2. The filing documents themselves — one or more files corresponding to entries in the metadata's documentFormatFiles manifest. The file-types found in the dataset are TXT, JSON, HTML, and PDF: TXT for early plain-text EDGAR submissions, HTML for the dominant post-2002 primary-document format, PDF for occasional scanned or typeset exhibits, and JSON only for the per-record metadata file. Image files (GIF, JPG) that may have been included in the original EDGAR submission are excluded from the redistribution; their entries still appear in the documentFormatFiles manifest with EDGAR URLs pointing back to the canonical Archives copy.

Each redistributed filing document preserves the EDGAR SGML document wrapper that surrounds its body. A typical wrapper carries <TYPE> (the document's form type, e.g., U-9C-3), <SEQUENCE> (its position in the submission), <FILENAME> (the on-disk filename), <DESCRIPTION> (filer-supplied label such as FORM U-9C-3, 4Q04), and a <TEXT> block enclosing the actual content. For HTML documents the <TEXT> block contains a full <HTML> body holding the form's tables, narrative text, signatures, and exhibits. For plain-text submissions the <TEXT> block contains monospaced ASCII tables and item headings.

Metadata schema

The metadata.json object follows the standard SEC-API filing-header shape. Its top-level fields are:

• formType — either U-9C-3 or U-9C-3/A.
• accessionNo — the hyphenated EDGAR accession number; the folder name is the same value with hyphens stripped.
• linkToFilingDetails — direct URL to the primary filing document on www.sec.gov.
• description — human-readable form description (Form U-9C-3 - Quarterly report, energy and gas companies [Rule 58]).
• linkToTxt — URL of the complete-submission SGML text file on EDGAR (<accession>.txt).
• linkToHtml — URL of the EDGAR index page for the accession.
• filedAt — ISO-8601 timestamp with EDGAR Eastern-time offset.
• periodOfReport — the fiscal-quarter end being reported on; always one of -03-31, -06-30, -09-30, or -12-31.
• id — internal SEC-API record identifier (32-character hex).
• documentFormatFiles — array describing every logical document in the EDGAR submission (sub-schema below).
• entities — array describing the filer (and any co-filer or related party) header information (sub-schema below).
• linkToXbrl and dataFiles — present in the schema but unused for this form.

Each documentFormatFiles[] entry carries sequence (the EDGAR document sequence number — typically "1" for the primary filing, higher integers for sequenced exhibits, and a blank string for the complete-submission wrapper), size (bytes, as a string), documentUrl (direct EDGAR URL), description (filer-supplied label), and type (EDGAR document type — U-9C-3 for the form itself, exhibit codes such as EX-99 for separately tagged exhibits, and a blank string for the complete-submission TXT). The terminal entry whose sequence and type are blank and whose description is Complete submission text file points to the SGML wrapper file on EDGAR. Multi-document filings — common for amendments and for filings that carry separately formatted exhibits — produce one entry per submitted document in this manifest.

Each entities[] entry describes a filer with cik (10-digit zero-padded), companyName (with a trailing role tag in parentheses such as (Filer), (Subject), or (Filed by)), irsNo (Employer Identification Number), stateOfIncorporation (US state code), fiscalYearEnd (MMDD), act (always "35" here, indicating the Public Utility Holding Company Act of 1935), fileNo (EDGAR file number; the 074- prefix is characteristic of PUHCA-registered holding companies), filmNo (EDGAR film number), sic (SIC code plus label — most filers fall in 4911 Electric Services, 4924 Natural Gas Distribution, or 4931 Electric & Other Services Combined), type (the form type carried per-entity), and tickers (array of ticker symbols, possibly empty for non-public subsidiaries).

Internal structure of the U-9C-3 filing document

The form follows a fixed item-and-part outline mandated by Rule 58 and the SEC's printed Form U-9C-3 instructions. The redistributed filing document reproduces the SEC's printed layout almost section-for-section, in the order described below.

Cover page

The first page identifies the filing as FORM U-9C-3 - QUARTERLY REPORT PURSUANT TO RULE 58, names the quarterly period (e.g., For the Quarterly Period Ending September 30, 2004), and gives the registered holding company's legal name and principal office address. A contact officer block follows — typically the company's secretary, assistant secretary, or compliance officer — with name, title, mailing address, and phone number for SEC-staff or state-commission inquiries about the filing.

Item 1 — Organization Chart

A six-column tabular listing of the system's energy-related and gas-related subsidiaries. Columns are: Name of Reporting Co., Energy or Gas Related (a classification flag), Date of Organization, State of Organization, Percentage of Voting Securities, and Nature of Business Held. Item 1 is the section that satisfies the disclosure of "energy-related and gas-related subsidiaries" called out in the dataset description. Item 1 may be omitted in fourth-quarter filings — filers do this with an explicit notation such as Omitted for the fourth fiscal quarter pursuant to Instructions for Item 1. rather than by leaving the section blank.

Item 2 — Issuance of Securities and Capital Contributions

Two stacked tables. The first is an issuance table whose columns are Company Issuing Stock, Type of Security Issued, Principal Amount, Issue or Renewal, Cost of Capital, Person to Whom Security Was Issued, Collateral Given With Security, and Consideration Received. The second is a capital-contribution table with columns Company Contributing Capital, Company Receiving Capital, and Amount of Capital Contribution. Item 2 is where newly acquired nonutility companies and intra-system funding flows surface; when no qualifying activity occurred during the quarter, filers populate the section with None. or No transactions this quarter.

Item 3 — Associate Transactions

A pair of tables that split intra-system service flows by direction:

• Part 1 lists transactions performed by the reporting company on behalf of its associate companies. Columns: Reporting Co. Rendering Services, Associate Co. Receiving Services, Types of Services Rendered, Direct Costs Charged, Indirect Costs Charged, Cost of Capital, and Total Amount Billed.
• Part 2 lists the converse — transactions performed by associate companies on behalf of the reporting company — using the same column set with the rendering and receiving roles flipped.

Free-form footnotes typically follow each table to flag transactions that the filer claims as exempted under other PUHCA rules, most commonly Rule 81 exempted transactions. Service categories in this section often include treasury and cash-management services, accounting and tax services, employee-benefits administration, and natural-gas processing or marketing services between affiliated entities.

Item 4 — Summary of Aggregate Investment

Two line-items disclosing the aggregate dollar investment held by the registered system in (a) Energy-Related Companies and (b) Gas-Related Companies. Filers frequently substitute a confidential-treatment notation for the numeric value — most commonly Confidential Treatment requested pursuant to Rule 104(b) — in which case the absolute amounts are not present in the public filing while the line-item itself remains.

Item 5 — Other Investments

A four-column table tracking changes in other energy-related investments since the previous report. Columns are Major Line of Energy-Related Business, Other Investment in last U-9C-3 Report, Other Investment in This U-9C-3 Report, and Reason For Difference in Other Investment. When there are no qualifying other investments to track, filers populate the table with NONE. rather than omitting it.

Item 6 — Financial Statements and Exhibits

Two subparts:

• Part A — Financial Statements. A list of per-subsidiary balance sheets and income statements covering the quarter. Each statement is enumerated by subsidiary name and statement type (e.g., one balance sheet plus one income statement for each energy-related and gas-related subsidiary). These statements are very commonly tagged Confidential treatment requested pursuant to Rule 104(b), in which case the underlying figures are withheld from the public filing while the enumerated list itself remains visible.
• Part B — Exhibits. Typically a single attestation exhibit labelled EXHIBIT A certifying that the prior quarter's U-9C-3 was filed with the relevant state commissions. Some filings include additional exhibits (organizational charts as separate attachments, supplemental schedules, or rule-specific certifications).

Signatures

A PUHCA-mandated signature block in which the registered holding company is named, attests that it has "duly caused this report to be signed and authorized" by an officer thereunto duly authorized, and provides a date, an /s/ signature line, the signer's printed name, and the signer's title — commonly Secretary, Assistant Secretary, Treasurer, or Controller.

Exhibit A — State-commission certificate

A free-text attestation that the previous quarter's U-9C-3 was filed with each named state commission having retail-rate jurisdiction over the system's utility subsidiaries. Each commission's full legal name and mailing address is enumerated (for example, State of New York Public Service Commission, 3 Empire State Plaza, Albany, New York 12223-1350), followed by an IN WITNESS WHEREOF clause and a second officer signature. This certificate is the textual record of the form's dual-filing obligation to both the SEC and state regulators, and its presence is what the dataset description references when it cites disclosure to "state commissions with jurisdiction over retail rates." Filers split between embedding Exhibit A directly in the primary document and submitting it as a separately tagged exhibit file; both arrangements are valid.

Included content

The redistributed accession folder includes the per-record metadata.json and every non-image document that was part of the original EDGAR submission: the primary U-9C-3 filing document and any separately tagged exhibits, in their native EDGAR formats (TXT, HTML, or PDF), each preserving the EDGAR SGML <DOCUMENT> wrapper. The metadata enumerates every document in the original submission — including ones that are not redistributed inline — so the manifest can always be reconciled against EDGAR.

Excluded or separately located content

Image files (GIF, JPG, and similar) are excluded from the redistribution per the dataset's stated policy. When a filer attached an organizational chart or signature image to the original submission, the corresponding entry remains in documentFormatFiles with a working EDGAR URL but the binary is not present in the folder. The complete-submission SGML wrapper TXT (<accession>.txt) is typically referenced in the manifest by URL rather than redistributed inline; the redistributed files are the individual document files into which the SGML submission decomposes.

Changes in required content over time

The form's required content was substantially fixed for the lifetime of Rule 58, which was promulgated in 1993 and remained in force until PUHCA's repeal. The Items 1–6 outline, the cover-page identification, the signature block, and the state-commission certificate exhibit were all present from the dataset's earliest 1997 filings through the final 2006 filings. SEC orders and no-action positions occasionally adjusted the boundaries of "energy-related" and "gas-related" activities, and refined when confidential-treatment requests under Rule 104(b) could be invoked, but they did not reshape the form's section structure.

The single material structural event in the dataset's window is the form's retirement. The Energy Policy Act of 2005 (Public Law 109-58), signed August 8, 2005, repealed PUHCA in its entirety through Title XII, Subtitle F (the "Public Utility Holding Company Act of 2005"), with the repeal taking effect six months after enactment — February 8, 2006. Repeal terminated both Rule 58 and the U-9C-3 reporting obligation as of that date. As a consequence the dataset has no records dated after early 2006, and a disproportionate share of the final months' filings are U-9C-3/A amendments closing out earlier quarters rather than new quarterly disclosures.

Changes in data format over time

Source-file format evolves across the dataset's nine-year window in the same way EDGAR's broader filing population did:

• 1997 through approximately 2001. Filings are predominantly plain-text SGML submissions. The primary document is most often a single .txt file whose <TEXT> block renders Items 1–6 with monospaced ASCII tables and Item 1, Item 2, etc. as text headings. Multi-document submissions are less common in this period; the per-record folder typically holds the primary TXT and, occasionally, separate exhibit TXTs.
• Approximately 2002 through 2005. HTML becomes the dominant primary-document format. Filers used SEC EDGARLink-generated HTML with explicit <TABLE> markup, EDGARLink stylesheet markers (<!-- MARKER FORMAT-SHEET=... -->), and inline signatures; the redistributed .htm files retain the surrounding EDGAR SGML wrapper. Multi-document filings appear more frequently as filers move from one monolithic TXT submission to a primary HTML form plus separately attached exhibits.
• Late 2005 through February 2006. Filing volume tapers sharply as the PUHCA repeal date approaches and then ceases entirely after February 8, 2006. Many of the final-period records are amendments (U-9C-3/A) cleaning up earlier reports rather than new quarterly disclosures.

PDF appears occasionally throughout the post-2001 period when a filer chose to attach a typeset or scanned exhibit — most often an organization-chart graphic or a state-commission certificate prepared as a PDF — rather than re-keying the content into HTML tables. A single accession can therefore mix formats, for example a primary HTML U-9C-3 accompanied by a PDF exhibit.

Interpretation notes

A few nuances matter when working with these records:

• Amendments. A U-9C-3/A record does not necessarily restate the entire prior filing. It may carry only the amended item(s) plus a fresh signature block and certificate, while the unamended sections are left to refer back to the original accession. Reconstructing a full as-amended record can require joining the amendment to its parent by filer CIK and periodOfReport.
• Confidential treatment. Items 4 and 6 (and occasionally pieces of Items 2 and 5) are routinely redacted via Confidential Treatment requested pursuant to Rule 104(b) annotations. The structural slot is present even when the dollar value is not, so machine extraction should not equate a redacted line with an absent line.
• Q4 omissions. Item 1's organization-chart table is allowed to be omitted in fourth-quarter filings. Filers do this explicitly with a stated reference to the Item 1 instructions, so a missing Item 1 in a Q4 record is a deliberate non-disclosure rather than a parsing failure.
• Empty sections. Filers commonly use None., NONE., or No transactions this quarter to populate Items 2, 3, and 5 when no qualifying activity occurred. These are meaningful negative disclosures, not gaps in the data.
• Embedded vs. separately filed exhibit. Some filers fold the state-commission certificate and the financial-statement list into the primary document; others split them into separate exhibit files. Both arrangements produce the same logical filing.
• SGML wrappers. Every redistributed document begins with the EDGAR SGML <DOCUMENT> block. Parsers that consume the HTML body directly should strip or skip past the wrapper rather than treat it as inline content.
• Identifier reconciliation. The accession folder name is the accession number with hyphens removed; the accessionNo field and the EDGAR URL components retain hyphens. The entities[].fileNo for U-9C-3 filers consistently begins with the 074- prefix that identifies PUHCA-registered holding companies, which can be used as a sanity check on filer eligibility.
• Dual-filing artifact. Because the form was filed simultaneously with the SEC and with state utility commissions, the contents of the SEC-EDGAR copy in this dataset and the state-commission copies are the same document; Exhibit A is the in-band evidence of that dual delivery.

Who Files or Publishes This Dataset, and When

Who files the record

Each record is a quarterly nonutility-activity report filed with the SEC by a registered public utility holding company under PUHCA 1935. The filer is the top-level parent that registered with the Commission under Section 5 of PUHCA 1935 and that, with its subsidiaries, formed a "holding company system" subject to SEC structural regulation. U-9C-3 is the original quarterly report; U-9C-3/A is an amendment to a previously filed U-9C-3, keyed to the same fiscal quarter as the original.

Filing population

The filer universe is narrow and structurally bounded by PUHCA 1935:

• Section 5 registered holding companies only. Holding companies that qualified for an exemption under Section 3 (for example, predominantly intrastate systems) did not register and did not file U-9C-3.
• Registered systems with Rule 58 activity. The form had operative content only for systems that owned or acquired energy-related or gas-related companies as defined in Rule 58 (17 CFR 250.58). A registered system without Rule 58 subsidiaries had nothing to report.
• The registered parent, not the utility subsidiary. The reporting obligation runs to the holding company at the top of the system. Operating electric and gas utility subsidiaries do not file U-9C-3 in their own right; the acquired Rule 58 companies are subjects of disclosure, not filers.

Because PUHCA registration applied only to a small set of multi-state electric and gas systems, the filer pool was always limited to a few dozen registrants during the form's active life.

Trigger and reporting cadence

Form U-9C-3 is periodic and calendar-driven, not event-driven. The trigger is the close of a fiscal quarter for a registered holding company with Rule 58 activity to disclose:

• Q1, Q2, Q3: due within 60 days after quarter-end.
• Q4: due within 90 days after fiscal year-end.

The quarterly obligation is imposed by Rule 58 itself: the rule permits certain nonutility acquisitions without prior Commission approval on the condition that the registered system report energy-related and gas-related subsidiary activity each quarter. U-9C-3 is the disclosure consideration for that relief.

A U-9C-3/A is filed by the same registered holding company (or its successor) when it must correct, restate, or supplement a prior U-9C-3, for example to fix subsidiary listings, revise interest-holding disclosures, or respond to staff comments. Amendments are tied to the original quarter, not to a new periodic deadline.

Regulatory framework

The regime sits inside PUHCA, not the Securities Act or Exchange Act periodic-reporting system:

• PUHCA 1935 subjected registered systems to comprehensive SEC oversight of structure, financings, and acquisitions. Acquisitions of nonutility businesses generally required prior SEC approval under Section 9(a) and Section 10.
• Rule 58 (17 CFR 250.58) carved out an exemption from Section 9(a)/10 prior approval for acquisitions of defined energy-related companies and gas-related companies, subject to investment caps tied to system consolidated capitalization or retail utility revenues. The exemption is conditioned on ongoing quarterly reporting via U-9C-3.
• Dual filing. U-9C-3 is filed both with the SEC and with each state public utility commission having jurisdiction over the retail rates of any utility subsidiary in the registered system, reflecting PUHCA's cooperative-federalism design.

Temporal boundaries

The dataset's coverage is set by two boundaries:

• EDGAR availability begins August 1997, when U-9C-3 became electronically filable. The dataset starts at 1997-08-01.
• Form retirement, February 8, 2006. The Energy Policy Act of 2005 (Pub. L. 109-58), Title XII, Subtitle F (the "Public Utility Holding Company Act of 2005") repealed PUHCA 1935 in full, effective six months after enactment on February 8, 2006. With Rule 58's statutory base gone, U-9C-3 was discontinued and holding-company supervision transferred to the Federal Energy Regulatory Commission (FERC) under PUHCA 2005's narrower books-and-records access regime.

Within the active window, the 60/90-day deadlines drove a predictable cadence per registered system per year; U-9C-3/A amendments arrive irregularly as corrections.

Important distinctions

• Exempt holding companies are out of scope. Section 3-exempt systems did not file U-9C-3 even if they held energy- or gas-related subsidiaries; Rule 58 operates only within the registered-system framework.
• U-9C-3 is one of several PUHCA forms. Registered systems also filed Form U5S (annual report), Forms U-1 and U5B (financings and declarations), and others. U-9C-3 covers specifically the Rule 58 nonutility-acquisition dimension; acquisitions outside Rule 58's safe harbor went through prior-approval applications, not U-9C-3.
• U-9C-3/A is filed by the original filer. An amendment is filed by the same registered holding company (or its legal successor) and references the original accession/quarter; it is not an independent periodic event.
• No SEC successor after February 2006. PUHCA 2005 replaced structural regulation with FERC-administered books-and-records access. Post-2006 holding-company structural data is captured, if at all, in FERC filings (e.g., FERC Form 60 for centralized service companies), not in any SEC form. The dataset is closed.
• Foreign and unregistered systems never filed. Foreign-based utility groups and U.S. systems below PUHCA 1935 registration thresholds are absent from the dataset, which reflects only SEC-registered domestic holding companies with Rule 58 activity.

How This Dataset Differs From Similar Datasets or Filings

Form U-9C-3 belongs to the closed family of SEC filings made under PUHCA. The comparisons that matter for users of this dataset fall into three groups: other PUHCA forms filed by the same companies (U5S, U-1, U-13-1, U5B, U-3A-2), Exchange Act periodic reports filed by those same parents (10-K, 10-Q), and the post-2006 FERC successor regime (FERC Form 60). Each is distinguished below on the axes that drive misclassification: legal authority, filer population, trigger, content, and dataset coverage.

Form U5S — annual report of registered public utility holding companies

The closest cousin to U-9C-3 and the form most likely to be confused with it. Same legal regime (PUHCA), same filer population (registered holding companies), same SEC division.

• Cadence: U5S is annual; U-9C-3 is quarterly (60 days after Q1-Q3, 90 days after Q4).
• Scope: U5S covers the full registered system — utility subsidiaries, financial statements, intercompany transactions, service-company allocations, organizational charts. U-9C-3 is narrowly scoped to Rule 58 nonutility acquisitions and energy-related and gas-related subsidiary activity.
• Form: U5S is an exhibit-heavy annual disclosure; U-9C-3 is a short quarterly narrative with subsidiary lists.

Use U5S for system-wide structural and financial data; use U-9C-3 for the quarterly cadence of nonutility diversification under Rule 58.

Form U-1 — application/declaration under Sections 9 and 10 of PUHCA

U-1 is the prior-approval vehicle: registered holding companies sought a Commission order before acquisitions, securities issuances, or intercompany loans. U-9C-3 is the post-hoc reporting counterpart for transactions covered by the Rule 58 safe harbor, which therefore did not require Section 9/10 approval.

• Trigger: U-1 is event-driven and pre-transaction; U-9C-3 is calendar-driven and post-transaction.
• Legal posture: U-1 seeks an order; U-9C-3 reports activity that needed none.
• Content: U-1 is a legal application with exhibits and proposed terms; U-9C-3 is a brief operating narrative.

The two are complementary: the universe of nonutility acquisitions on U-9C-3 is largely the universe that did not require a U-1.

Form U-13-1 — mutual service company filings under Section 13

U-13-1 documents the formation, contracts, and allocation methods of mutual and subsidiary service companies. It overlaps with U-9C-3 only insofar as both describe intra-system activity. The substance is unrelated: U-13-1 is about how affiliated service companies bill out centralized services; U-9C-3 is about Rule 58 nonutility acquisitions. Cost-flow questions point to U-13-1 (and U5S annexes); diversification questions point to U-9C-3.

Form U5B — registration statement for new registered holding companies

A one-time entry filing under PUHCA Section 5 that establishes a system in the registered population and lists subsidiaries at registration. U-9C-3 is filed only after registration and only as recurring quarterly Rule 58 reporting. U5B is rare per issuer; U-9C-3 recurs every quarter through early 2006. U5B marks the start of a system's PUHCA reporting history; U-9C-3 is part of the recurring stream that follows.

Form U-3A-2 — annual exemption statement under Section 3(a)

Filed by holding companies exempt from registration under Section 3(a) — the opposite filer population from U-9C-3, which was filed only by registered holding companies. The two describe mutually exclusive sets of companies, even though both regimes ended together with PUHCA's 2006 repeal. Treating them as interchangeable misclassifies the issuer's regulatory status.

Form 10-Q — Exchange Act quarterly report

Many registered holding companies filed both 10-Q and U-9C-3 each quarter. They are not substitutes.

• Authority: 10-Q under Sections 13/15(d) of the Exchange Act; U-9C-3 under PUHCA Rule 58.
• Content: 10-Q carries GAAP unaudited financials and MD&A for the registrant; U-9C-3 carries a PUHCA-specific narrative on nonutility acquisitions and energy/gas-related subsidiaries, with no full financial statements.
• Filer scope: 10-Q reports the registrant's GAAP-consolidated group; U-9C-3 reports the holding-company system under PUHCA definitions, which differ from GAAP consolidation.

A 10-Q and a U-9C-3 from the same parent and quarter answer different questions and rarely overlap textually.

Form 10-K — Exchange Act annual report

Same Exchange Act vs. PUHCA divide as the 10-Q comparison, at annual cadence. The PUHCA annual analogue is U5S, not U-9C-3. To reconstruct a registered system's annual position, pair 10-K (Exchange Act financials) with U5S (PUHCA system disclosure); use U-9C-3 only as the quarterly bridge for Rule 58 nonutility activity, not as a financial substitute.

FERC Form 60 — post-2006 holding company annual report

After PUHCA 1935 was repealed effective February 2006, holding-company oversight moved to FERC under PUHCA 2005, with Form 60 as the new annual report for centralized service companies.

• Regulator and venue: FERC eLibrary, not SEC EDGAR.
• Cadence and scope: Annual; focused on service-company financials and intercompany allocations — not quarterly nonutility acquisition disclosure.
• Coverage handoff: U-9C-3 ends in February 2006; Form 60 begins fiscal year 2006. No FERC instrument replicates Rule 58 quarterly nonutility reporting; that regime was not carried forward.

A continuous time series on holding-company nonutility diversification cannot be built by chaining U-9C-3 into Form 60 — the regulatory question itself changed.

Boundary summary

Form U-9C-3 is distinct on five axes:

1. Legal authority: PUHCA Rule 58 only — not Sections 9/10 (U-1), Section 5 (U5B), Section 13 (U-13-1), Section 3(a) (U-3A-2), or the Exchange Act (10-K/10-Q).
2. Filer population: registered (not exempt) public utility holding companies, during active registration.
3. Trigger: routine quarterly post-acquisition reporting for transactions inside the Rule 58 nonutility safe harbor — not pre-approval, annual aggregation, or event-driven disclosure.
4. Content: quarterly narrative of nonutility activity, energy-related and gas-related subsidiary lists, newly acquired companies, and system-company interests. No full financial statements, no service-agreement detail.
5. Coverage window: a closed corpus of U-9C-3 and U-9C-3/A filings spanning August 1997 through February 2006. The form is permanently retired.

Use U5S for annual system-wide disclosure, U-1 for pre-approval records, U-13-1 for service-company economics, U5B for system entry, U-3A-2 for exempt holding companies, 10-K/10-Q for GAAP financial reporting by the same parents, and FERC Form 60 for the post-2006 successor regime. Use U-9C-3 only for the quarterly trail of Rule 58 nonutility diversification inside registered holding-company systems during the final decade of PUHCA 1935.

Who Uses This Dataset

This is a closed historical archive of Rule 58 quarterly reports filed by registered public utility holding companies between August 1997 and PUHCA's repeal in February 2006. Realistic users work on historical reconstruction, litigation support, regulatory archaeology, and academic research, not live monitoring.

Regulatory historians and academic researchers

Scholars of U.S. electric and gas utility regulation use the corpus to study how registered holding-company systems behaved under Rule 58 during the late PUHCA era and the run-up to repeal. They map system topology over time from Item 1 organization charts and the energy-related and gas-related subsidiary listings, track distance to the 50% nonutility ceiling using Item 4 aggregate investment, and pick up activity outside the Rule 58 safe harbor through Item 5. Output is peer-reviewed work and policy histories of deregulation.

Energy economists and policy analysts

Economists at think tanks, regulatory consultancies, and government research offices use U-9C-3s as one of the few quarter-by-quarter disclosures of nonutility expansion outside ratemaking proceedings. Item 2 issuance and capital contributions quantifies how parents funded subsidiary growth; Item 3 associate transactions captures intra-system flows; Item 4 benchmarks the pace of diversification across systems. The narrative section is coded to classify acquisitions by sector for retrospective consolidation studies.

Litigation support and forensic accounting teams

In disputes involving long-tail liabilities of former PUHCA registrants — environmental remediation, successor liability, dissolved-subsidiary obligations, contested affiliate transactions — these teams use U-9C-3s to fix what was disclosed and when. Item 1 charts plus the metadata.entities[] block establish corporate genealogy as of a given quarter. Item 2 and Item 3 trace money movements between parent, service company, and operating affiliates. Item 5 surfaces minority stakes that later became contested. The Exhibit A state-commission certificate is treated as contemporaneous evidence of what state regulators were told. Output: exhibits, expert reports, and timelines.

Corporate-development and integration teams at utility holding companies

In-house M&A and integration staff use the archive to reconstruct the genealogy of energy-related and gas-related subsidiaries that landed on current balance sheets through 1997-2006 acquisitions, internal reorganizations, and joint ventures often unrecoverable from current 10-K exhibits. They walk Item 1 charts across sequential quarters, tie newly acquired companies in the narrative to Item 4 acquisition values, and use the result for clean-room diligence on legacy entities and portfolio rationalization.

State commission staff and consumer advocates

Commission staff and ratepayer advocates revisit Rule 58 acquisitions whose ratemaking effects still flow through cost-of-service, affiliate-cost allocations, and stranded-cost proceedings. They lean on Item 3 for affiliate cost flows, Item 2 for capital-structure history, and Exhibit A to confirm what the state was told. Output is testimony, discovery requests, and rate-case exhibits anchored in disclosures predating current FERC and state filings.

FERC compliance and books-and-records teams

Compliance staff at successor holding-company systems and at federal regulators use the dataset to reconstruct the pre-2006 baseline for acquisitions that fell under FERC jurisdiction after PUHCA-2005 transferred books-and-records oversight and merger-review functions. Item 4 aggregate investment, Item 5 other investments, and the energy-related and gas-related subsidiary listings flag entities relevant to current books-and-records access and Section 203 historical analyses.

Quantitative legal and policy researchers

Teams building structured datasets on subsidiary structures, intra-system transactions, and energy-sector consolidation parse the corpus into relational form. They rely on metadata.entities[] for filer and parent identification, Item 1 charts as the spine of subsidiary graphs, Item 4 for normalized financial fields, and Item 6 financial statements for system-level totals. Item 5 and the narrative are mined as text for acquisition and divestiture events. Output: cleaned panel datasets feeding econometric, network, and empirical-legal work.

Tax counsel and restructuring advisers

Practitioners tracing system-company investments and inter-affiliate transactions during the Rule 58 era use the dataset to reconstruct historical tax basis, identify dormant legacy entities, and document the timing and form of capital infusions. Item 2 anchors capital contributions, Item 3 covers intra-system loans and services, Item 4 supports cost-basis evidence, and Item 5 records minority positions. The work backs basis studies, entity-rationalization projects, and positions taken on intercompany transactions completed during the PUHCA period.

Specific Use Cases

Concrete workflows the U-9C-3 archive supports for historical reconstruction of registered holding-company nonutility activity between 1997 and February 2006.

• Reconstructing subsidiary genealogies across a registered system. Walk Item 1 organization-chart tables across sequential quarterly filings for one parent CIK to build a panel of energy-related and gas-related subsidiaries with date of organization, state of organization, percentage of voting securities, and nature of business. Join across metadata.entities[].cik to follow renames, transfers, and dispositions. Output feeds clean-room diligence files and successor-liability charts where current 10-K Exhibit 21 listings no longer name the entity.

• Quantifying Rule 58 nonutility diversification trajectories. Extract Item 4 aggregate-investment line items for Energy-Related Companies and Gas-Related Companies from each filing, joining on periodOfReport and filer CIK to construct a quarterly diversification time series per registered system. Where Item 4 carries a Confidential Treatment requested pursuant to Rule 104(b) marker, flag the slot rather than treating it as zero. The resulting panel supports retrospective consolidation studies and policy histories of the late-PUHCA era.

• Evidencing affiliate cost flows in legacy rate proceedings. For state-commission staff and ratepayer advocates revisiting Rule 58 acquisitions whose effects still flow through cost-of-service, pull Item 3 Part 1 and Part 2 tables for the relevant parent and quarters to document services rendered, direct and indirect costs charged, and total amounts billed between the holding company and its associate companies. Pair with the Exhibit A state-commission certificate as contemporaneous evidence that the disclosure reached the state. Output: discovery exhibits and rate-case testimony anchored to specific accession numbers.

• Tracing capital-infusion history for tax basis and restructuring work. Mine Item 2 issuance tables (company issuing stock, type of security, principal amount, person to whom issued, consideration received) and capital-contribution tables (contributing company, receiving company, amount) for each Rule 58 nonutility entity over its reporting life. The reconstructed sequence backs historical tax-basis studies, intercompany-loan documentation, and entity-rationalization projects targeting dormant legacy subsidiaries from the PUHCA window.

• Building a reconciled amendment-aware filing index. Use formType to separate U-9C-3 originals from U-9C-3/A amendments, then join amendments to their parent originals on filer CIK plus periodOfReport to produce an as-amended view of each quarter. Surface which items were restated by diffing Items 1 through 6 against the original filing; this is essential for the late-2005 and early-2006 records, which skew heavily toward amendments closing out earlier quarters.

• Compiling a state-commission disclosure ledger from Exhibit A. Parse Exhibit A free-text attestations to extract every state public service or public utility commission named, with mailing addresses and the certifying officer signature, and key the result by filer CIK and periodOfReport. The resulting ledger documents the dual-filing footprint of each registered system across state regulators and supports forensic timelines in successor-liability and environmental-remediation matters.

• Cataloguing minority and other energy-related investments outside the safe harbor. Extract Item 5 four-column tables (major line of business, prior-report investment, current-report investment, reason for difference) to identify minority stakes, joint ventures, and out-of-safe-harbor positions, then track movement quarter over quarter. Combined with Item 1 entries that disappear or change ownership percentage, this surfaces divestitures and stake adjustments that later become contested in litigation or relevant to FERC Section 203 historical analyses.

Dataset Access

Dataset Index JSON API: https://api.sec-api.io/datasets/form-u9c3-files.json

This endpoint returns the dataset metadata, including the full archive download URL and the list of monthly container files. Each container entry includes its size, record count, last updated timestamp, and a direct download URL. The endpoint can be polled regularly to detect which containers were modified in the latest refresh run, so downstream consumers can selectively download only the containers that changed. No API key is required to call this endpoint.

Example response:

          1
          {
        

          2
            "datasetId": "1f13365b-9ae0-69b6-85c2-1420579fd4c4",
        

          3
            "datasetDownloadUrl": "https://api.sec-api.io/datasets/form-u9c3-files.zip",
        

          4
            "name": "Form U-9C-3 Files Dataset",
        

          5
            "updatedAt": "2026-03-21T02:51:19.000Z",
        

          6
            "earliestSampleDate": "1997-08-01",
        

          7
            "totalRecords": 1322,
        

          8
            "totalSize": 11681707,
        

          9
            "formTypes": ["U-9C-3", "U-9C-3/A"],
        

          10
            "containerFormat": "ZIP",
        

          11
            "fileTypes": ["TXT", "JSON", "HTML", "PDF"],
        

          12
            "containers": [
        

          13
              {
        

          14
                "downloadUrl": "https://api.sec-api.io/datasets/form-u9c3-files/2006/2006-02.zip",
        

          15
                "key": "2006/2006-02.zip",
        

          16
                "size": 184213,
        

          17
                "records": 9,
        

          18
                "updatedAt": "2026-03-21T02:51:19.000Z"
        

          19
              }
        

          20
            ]
        

          21
          }
        

Download Entire Dataset: https://api.sec-api.io/datasets/form-u9c3-files.zip?token=YOUR_API_KEY

Downloads the complete dataset as a single ZIP archive containing every Form U-9C-3 and U-9C-3/A filing from August 1997 through the form's discontinuation in February 2006. This endpoint requires an API key.

Download Single Container: https://api.sec-api.io/datasets/form-u9c3-files/2005/2005-11.zip?token=YOUR_API_KEY

Downloads one monthly container ZIP instead of the full archive. Container keys follow the form-u9c3-files/<YYYY>/<YYYY-MM>.zip pattern, allowing targeted retrieval of a specific month. This endpoint requires an API key.

Frequently Asked Questions

What does one record in this dataset represent?

One record is a single Form U-9C-3 or U-9C-3/A filing as it was submitted to EDGAR, identified by an 18-digit zero-padded accession number. The accession folder bundles a metadata.json describing the EDGAR header and document manifest together with the redistributed filing documents in their native EDGAR formats (TXT, HTML, or PDF), each preserving its EDGAR SGML <DOCUMENT> wrapper.

Who was required to file Form U-9C-3?

Only registered public utility holding companies under Section 5 of PUHCA 1935 that engaged in Rule 58 energy-related or gas-related nonutility activity. Section 3-exempt holding companies, operating utility subsidiaries, foreign systems, and U.S. systems below the registration threshold did not file. The reporting obligation runs to the top-level registered parent, not to its utility subsidiaries.

When were filings due?

The form was periodic and calendar-driven. Filings for Q1, Q2, and Q3 were due within 60 days after quarter-end, and the Q4 filing was due within 90 days after fiscal year-end. The form was filed simultaneously with the SEC and with each state public utility commission having jurisdiction over the retail rates of any utility subsidiary in the system.

What time period does the dataset cover?

Coverage runs from 1997-08-01, when U-9C-3 became electronically filable on EDGAR, through February 8, 2006, when the Energy Policy Act of 2005 repealed PUHCA 1935 in full and discontinued the form. The dataset is closed: no records exist for reporting periods after early 2006, and the final months skew heavily toward U-9C-3/A amendments closing out earlier quarters.

What file formats and container layout does the dataset use?

Records are distributed in monthly ZIP containers organized as form-u9c3-files/<YYYY>/<YYYY-MM>.zip. Inside each container, every filing has its own accession-numbered subfolder containing metadata.json plus the filing documents in TXT (early plain-text submissions), HTML (the post-2002 dominant format), and occasional PDF exhibits. Image files (GIF, JPG) are excluded from the redistribution but remain referenced in the documentFormatFiles manifest with EDGAR URLs.

How does this dataset differ from Form U5S filings?

Both forms come from the same registered holding companies under PUHCA, but U5S is the annual system-wide report covering utility subsidiaries, financial statements, intercompany transactions, and service-company allocations, while U-9C-3 is the quarterly report narrowly scoped to Rule 58 nonutility (energy-related and gas-related) activity. Use U5S for system-wide structural and financial data; use U-9C-3 for the quarter-by-quarter cadence of nonutility diversification under the Rule 58 safe harbor.

Is there a successor dataset after PUHCA's repeal?

No SEC successor exists. After February 2006, holding-company oversight transferred to FERC under PUHCA 2005, with FERC Form 60 serving as an annual report for centralized service companies on FERC eLibrary. Form 60 does not replicate Rule 58 quarterly nonutility reporting, so a continuous time series on holding-company nonutility diversification cannot be constructed by chaining U-9C-3 into Form 60.