Who owns a stock and who is about to sell it, from official SEC filings: what a fund such as Berkshire Hathaway holds (13F, with changes vs the previous quarter), which funds hold a ticker, who filed a 5%+ stake (13D activist, 13G passive), and which insiders filed to sell (Form 144). For investors, analysts and AI agents.

Price$0.0018 per row

DomainFinance & SEC

Call itApify API or MCP

Pricing (pay per event): $0.0018 per row ($1.80 per 1,000), no start fee.

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Questions agents ask

“What did Berkshire Hathaway buy and sell last quarter?”
“Which funds hold the most Nvidia stock?”
“Has anyone filed an activist 13D on Peraso?”
“Which insiders filed to sell more than $1 million of stock this week?”

What you get

Field	Type	Meaning
`schema_version`	string	Output schema version.
`record_type`	string	holding = a position in one 13F filer's portfolio; holder = one 13F filer holding the asked stock (SEC Form 13F data set); stake = one Schedule 13D/13G filing; form144 = one Form 144 notice.
`form`	string	Form as filed: 13F-HR or 13F-HR/A; 13D, 13D/A, 13G or 13G/A (Schedule); 144 or 144/A.
`filer_name`	string \| null	holding/holder: the 13F manager. stake: the first reporting person on the filing.
`filer_cik`	string \| null	SEC CIK (10 digits) of the 13F manager, of the 13D/13G filer, or of the person filing the Form 144.
`period_of_report`	string	13F rows: the quarter end the holdings are reported for (YYYY-MM-DD).
`accession_number`	string	SEC accession number of the filing the row comes from.
`filing_date`	string	Date the SEC received the filing (YYYY-MM-DD).
`issuer_name`	string \| null	Company whose securities are held, owned or to be sold, as written in the filing (13F names are often abbreviated).
`issuer_cik`	string \| null	stake/form144: SEC CIK (10 digits) of the issuer.
`title_of_class`	string \| null	13F rows: class of the security as filed, e.g. COM, CL A, CAP STK CL C.
`cusip`	string	13F rows: 9-character CUSIP of the security.
`cusips`	array	stake: the issuer CUSIP(s) on the cover page.
`ticker`	string \| null	Ticker of this security from the SEC's ticker list: the issuer by CIK or name, the share class by CUSIP or the class in title_of_class (GOOG for Alphabet class C). Null when unknown, or when the issuer has several share classes and the class can't be told (see ticker_candidates).
`ticker_candidates`	array	When ticker is null because the issuer has several listed share classes: the issuer's tickers, main first (e.g. ["BRK-B", "BRK-A"]). Empty otherwise. Ticker filters match these too.
`put_call`	string \| null	13F rows: PUT or CALL for option positions (value = the underlying), null for shares and bonds.
`shares`	number \| null	13F rows: shares (or principal amount when share_type is PRN) held at quarter end, summed over the filing's lines; 0 for a closed position. stake: shares beneficially owned by the reporting person with the highest percent.
`share_type`	string \| null	13F rows: SH (shares) or PRN (principal amount).
`value_usd`	number \| null	13F rows: market value in US dollars at quarter end as reported (filings before 2023-01-03 reported $1,000s and are multiplied by 1,000).
`portfolio_pct`	number \| null	holding: value as a percentage of the filing's total reported value.
`previous_period`	string \| null	holding: the previous quarter end the change is measured against.
`previous_shares`	number \| null	holding: shares at the previous quarter end (0 = not held then, null = no 13F for that quarter).
`previous_value_usd`	number \| null	holding: value at the previous quarter end, in US dollars.
`shares_change`	number \| null	holding: shares minus previous_shares.
`shares_change_pct`	number \| null	holding: shares_change as a percentage of previous_shares (null when not held before).
`change`	string \| null	holding: new, increased, decreased, unchanged or closed (sold out) vs the previous quarter; null when unknown.
`stake_type`	string \| null	stake: activist (Schedule 13D: may seek to influence control) or passive (Schedule 13G).
`amendment_no`	integer \| null	stake: amendment number on the cover page (null for an original filing).
`security_class`	string \| null	stake/form144: class of securities as filed, e.g. Common Stock.
`percent_of_class`	number \| null	stake: percent of the class beneficially owned, the highest among the reporting persons (group members usually report the same aggregate).
`reporting_persons`	array	stake: every reporting person on the cover pages: name, cik (null if none), percent_of_class, shares, person_type (SEC codes like IA, IN, PN, CO).
`event_date`	string \| null	stake: date of the event that required the filing (YYYY-MM-DD).
`seller_name`	string \| null	form144: the person for whose account the securities are to be sold, as filed.
`relationships`	array	form144: relationship to the issuer as filed, e.g. Director, Officer, 10% Securityholder.
`shares_to_be_sold`	number \| null	form144: number of shares (units) to be sold, summed over the notice's lines.
`aggregate_market_value_usd`	number \| null	form144: aggregate market value of the shares to be sold, in US dollars, as filed.
`shares_outstanding`	number \| null	form144: shares of the class outstanding, as filed.
`approx_sale_date`	string \| null	form144: approximate date of sale (YYYY-MM-DD; the earliest if several).
`exchanges`	array	form144: exchange(s) where the shares are to be sold.
`broker_names`	array	form144: broker(s) or market maker(s) handling the sale.
`plan_adoption_dates`	array	form144: adoption dates of the Rule 10b5-1 trading plan, if the sale is under one (YYYY-MM-DD).
`notice_date`	string \| null	form144: date of the notice (YYYY-MM-DD).
`filing_url`	string	EDGAR index page of the filing.
`source`	string	edgar-13f (the filing's information table), sec-13f-data-set (SEC Form 13F data set) or edgar-xml (the filing's XML).
`source_url`	string	The exact SEC file the row was read from.
`retrieved_at`	string	UTC time the row was produced.

Use with AI agents (MCP)

Add this URL to your MCP client (Claude, Cursor, VS Code, ...) to load the Actor as a tool through the Apify hosted MCP server. It signs you in with OAuth or accepts Authorization: Bearer <APIFY_TOKEN>. It works once the Actor is live on the Apify Store.

https://mcp.apify.com?tools=bosco_labs/sec-ownership

For “What did Berkshire Hathaway buy and sell last quarter?” the agent passes:

{"mode": "holdings13f", "filer": "Berkshire Hathaway"}

small, typed JSON, one row per position, holder or filing, with schema_version, a source_url pointing to the exact SEC file and a filing_url for the filing, so the agent can cite its source. Bad input fails within seconds with a status message that says what to fix and shows a valid input.

Or call the Apify API: POST https://api.apify.com/v2/acts/bosco_labs~sec-ownership/run-sync-get-dataset-items with the input as JSON body. Cost: $0.0018 per row.

Input fields

Field	Type	Meaning
`mode`	string	holdings13f = Form 13F: pass `filer` for a fund manager's holdings (with changes vs the previous quarter), or `ticker`/`cusip` for the funds holding a stock. stakes13dg = Schedule 13D/13G filings about `ticker`, or new 13D filings market-wide. planned144 = Form 144 notices of planned insider sales for `ticker`, or market-wide. Default holdings13f.
`filer`	string	holdings13f only: the fund manager's name or SEC CIK, e.g. "Berkshire Hathaway" or "1067983". A name is matched with EDGAR's company search (the first match that files 13F reports); a CIK is exact. Empty = look up the holders of `ticker`/`cusip` instead.
`ticker`	string	The company the shares are in, as a current US ticker, e.g. "AAPL". holdings13f: the funds holding it (or, with `filer`, only that position). stakes13dg / planned144: filings about it. Empty = whole market (stakes13dg, planned144).
`issuerCik`	string	Instead of `ticker`: the company's SEC CIK as digits, e.g. "320193" for Apple. Use for delisted or renamed companies. Empty = use `ticker`.
`cusip`	string	holdings13f only: the 9-character CUSIP of one share class, e.g. "037833100" (Apple common stock). Most precise way to ask which funds hold a security. Empty = CUSIPs found in the company's recent Schedule 13D/13G filings (all its share classes).
`quarter`	string	holdings13f only: the quarter of the holdings, as "2026Q2" or the quarter end "2026-06-30". Empty = the newest: the filer's latest 13F, or for holders of a stock the newest quarter in the SEC's Form 13F data sets (13F reports are due 45 days after quarter end).
`stakeForms`	array	stakes13dg only: which forms, e.g. ["13D"] for new activist stakes only. Empty = all four for a ticker; 13D and 13D/A for the whole market (activist alerts).
`minValueUsd`	integer	Minimum value in US dollars, e.g. 1000000. planned144: the notice's aggregate market value; holdings13f: the position value. Default 0 = no minimum. Not used by stakes13dg.
`dateFrom`	string	stakes13dg / planned144: earliest filing date, YYYY-MM-DD, e.g. "2026-10-01". Structured 13D/13G start 2024-12-18. Empty = `lookbackDays` before today.
`dateTo`	string	stakes13dg / planned144: latest filing date, YYYY-MM-DD, e.g. "2026-10-31". Empty = today, including today's filings from the EDGAR live feed.
`lookbackDays`	integer	stakes13dg / planned144, used when `dateFrom` is empty: filings from this many days back until today, e.g. 30. Empty = 365 days for a ticker's 13D/13G, 90 for a ticker's Form 144, 7 for the whole market.
`maxResults`	integer	Maximum rows (one charged event each), e.g. 200. Default 50: a fund's largest positions, a stock's largest holders, or the newest filings.

Sources, licence and limits

How current is 13F data? 13F reports are quarterly and due 45 days after quarter end, so holdings are up to 4.5 months old when they appear. Positions are what the manager reported: long US-listed equities, options and convertibles on the SEC's 13(f) list; no shorts, no non-US holdings, no cash.

Values? As reported, in US dollars at quarter end (reports filed before 2023 used $1,000s and are converted). Amendments are applied: a restatement replaces the original report, a "new holdings" amendment adds to it.

Tickers? 13F filings carry CUSIPs, not tickers, and the SEC publishes no CUSIP-to-ticker list. The company is found by its CIK or, on 13F rows, its name in the SEC's ticker list (renamed or oddly abbreviated names stay null). The share class comes from the CUSIP (Alphabet class C 02079K107 is GOOG, class A 02079K305 is GOOGL; likewise Fox, News Corp, Under Armour, Zillow and the Liberty tracking stocks) or from the class in title_of_class when the ticker names it (BRK-A / BRK-B, LEN / LEN-B, HEI / HEI-A). When a company has several listed classes and the row doesn't say which, ticker is null and ticker_candidates lists the company's tickers; a ticker filter matches those too. cusip is always the exact security.

Which funds hold a ticker: which CUSIP? The ticker's CUSIPs are read from the company's recent Schedule 13D/13G filings, which can cover several share classes; CUSIPs of another class (GOOGL when you ask for GOOG) are left out and named in the status message. Pass cusip for one exact security, or when the company has no recent 13D/13G.

A name matched the wrong fund? Names go through EDGAR's company search; the status message lists the other matches. Pass the CIK as filer to be exact.

Older 13D/13G? Only filings since 2024-12-18, when Schedule 13D/13G became structured XML. For older ones, use our SEC EDGAR Filings Actor for the filing links.

13D vs 13G? A 13D is filed by a holder of more than 5% who may seek to influence the company (activist); a 13G by passive holders and institutions. percent_of_class is the highest among the filing's reporting persons; all of them are in reporting_persons.

Form 144? A notice by an insider or affiliate of a planned sale of restricted or control stock, filed when the order is placed. It is not proof that the sale happened (Form 4 reports that: see our SEC Insider Trading Actor). Not every Form 144 is followed by a sale.

Legal basis? SEC filings are US government public records; see LEGAL.md. This is data, not investment advice.

Coming soon to the Apify StoreAsk for early access

SEC Ownership API: 13F Holdings, 13D/13G Stakes, Form 144

Questions agents ask

Example

Input

Output

What you get

Use with AI agents (MCP)

Input fields

Sources, licence and limits