Who's buying NVIDIA?
What did Berkshire trim?
Ask the filings.
The clean record of who owns what. 5.9M+ SEC filings parsed for research and AI agents. 13F holdings reconciled against filing totals, with unit corrections and quarantined exceptions made visible.
Largest NVIDIA adds this quarter Works with$75 trillion+
in 13F holdings as reported for Q2 2026, options excluded
5.9M+
SEC filings parsed
18.7M+
EDGAR filings indexed since 1994
88M+
13F position records across 53 quarters
20 years
of insider filings: Forms 3, 4 and 5 since 2006
11,587
13F filings with unit errors caught and corrected
5,270
institution-quarters quarantined rather than guessed
How we count
- $75 trillion+ in 13F holdings as reported for Q2 2026, options excluded: $75,314,385,472,507 of holdings reported on Form 13F by 8,729 institutions, put and call rows excluded ($82,272,147,240,566 with them): one selected filing set per institution for the quarter, including amendments that add holdings; unit errors corrected; published institutions only; rounded down. Reported value, not market size: one manager can report shares of a fund or ETF whose own manager reports the underlying securities.
- 5.9M+ SEC filings parsed: 5,950,704 distinct SEC filings (accession numbers) parsed into tables, excluding XBRL-only references.
- 18.7M+ EDGAR filings indexed since 1994: 18,768,348 filings from 985,205 filers in the EDGAR index. Indexed does not mean parsed.
- 88M+ 13F position records across 53 quarters: 88,337,541 13F position records in the serving tables: records, not trades or unique investments.
- 20 years of insider filings: Forms 3, 4 and 5 since 2006: 4,494,967 Form 3, 4 and 5 filings.
- 11,587 13F filings with unit errors caught and corrected: 11,587 of 311,477 selected 13F filings: detector overrides of dollars-versus-thousands errors, with the original values kept.
- 5,270 institution-quarters quarantined rather than guessed: Of 305,479 13F institution-quarters checked against their own cover totals, 300,209 are published; the rest are held back with a reason code.
Filings are distinct accession numbers. Measured 2026-09-25 on the production database, one copy.
The Terminal
Institutions, stocks, insider trades, congressional trades and crypto ETF holders in one workbench. Data previews are free; a free account shows every row in the allowed period.
Institutions
SEC Form 13F-HR · ranked by reported 13F value
One position, two ways to query it
Browse Berkshire Hathaway's Apple position in the Terminal, or request the same row over REST. Every figure comes from the API.
SEC Form 13F-HR · Berkshire Hathaway Inc
Institutional holdings
One position, one row, one request
In its Q2 2026 13F-HR, Berkshire reports Apple on 12 lines, split by manager and discretion. The API returns one row: the position an analyst means. Press Run to request the latest available row live.
Source: 13F-HR 0001193125-26-352200 (opens the filing on sec.gov) · reported total $299.25B. 13F, Form 4 and similar REST rows do not include an accession number; the filing lookup endpoints locate the source documents.
Captured example · Q2 2026 · verified 2026-09-23
curl "https://api.ko.io/api/v1/holdings/1067983?ticker=AAPL" \-H "Authorization: Bearer $KO_API_KEY"# 200 OK{ "data": [{"ticker": "AAPL","name_of_issuer": "APPLE INC","quarter_date": "2026-06-30","shares_held": "227917808","holding_value": "65950296923","portfolio_weight_pct": 22.04,"action": "UNCHANGED"}] }
Works with your AI agent
Ask what a portfolio manager would ask. The agent chains ko.io tools across 13F holdings, congressional trades, fails-to-deliver and prices, draws the chart and cites the filing.
Questions an analyst asked
Each run was captured from the live MCP server between Sep 24, 2026 and Sep 26, 2026. The charts and answers use only the numbers the tools returned.
How did reported institutional holdings of NVIDIA change in the latest 13F quarter? Which of the 25 largest holders changed their positions the most?
Latest-quarter example · The Free plan or demo mode reproduces it while Q2 2026 is the latest 13F quarter
Show the full answerHide the full answer
Called 2 tools on ko-sec-data
In Q2 2026, NVDA common shares reported by 13F filers rose by a net 194.70M shares from the previous quarter, an estimated $38.96B at quarter-end prices (option legs excluded). 3,292 filers increased their positions, including 274 new positions, and 2,480 reduced them, including 115 that exited. These counts include filers with no prior-quarter filing on record. The changes compare reported quarter-end positions; they do not measure trading volume or cash flows.
Among existing positions in the 25 largest holders (reported shares, all legs as filed), the largest increases were FMR (Fidelity) (+32.20M), State Street (+15.90M) and BlackRock (+14.85M); the largest reductions were Citadel Advisors (-18.63M), Wellington (-11.77M) and Legal & General (-10.33M).
Connect your AI agent
Claude, Codex, Cursor, Grok and Gemini use the same server. Without an API key it runs in demo mode: Free-plan tools only, rate-limited per IP.
Claude CodeRun in your terminal.
claude mcp add ko-sec-data --transport http https://mcp.ko.io/mcpTools, questions and sourcesHide tools, questions and sources
- Ask about any 13F filer, insider, member of Congress or ticker.
- 24 tools, 19 on the Free plan. See all
- Available fields vary by tool; filing lookup tools retrieve source documents. 13F and Form 4 REST rows currently lack accession numbers.
Holdings, trades and macro, one API key
Browse all 23 datasets13F holdings
Quarterly fund holdings
13F-HR · Quarterly · Free plan
Insider trades
Officers and directors
Form 4 · Daily · Free plan
Congress trades
House and Senate
PTR · As filed · Free plan
Fails-to-deliver
FTD and Reg SHO lists
Via REST and MCP
SEC FTD · Twice monthly · Free plan
Macro
Treasury yields, Fed rates, CPI
Via REST and MCP
Treasury, Fed · By release · Pro plan
Built for scale. Served from the edge.
Served from data centers in Europe and Asia-Pacific over a global edge network spanning 340+ cities. High-throughput pipelines, precomputed research views, low-latency queries.
340+
cities in our edge provider's global network
2
serving regions: Europe and Asia-Pacific
3
database replicas across both regions
410M+
rows in the serving tables, per replica
How a filing becomes an answerHide the four steps
SEC disclosures
SEC EDGAR and 13 more official sources.
Sources by datasetCleaning and reconciliation
Parse supported forms; for 13F, correct detected unit errors, select amendments, consolidate filers and reconcile to cover totals. 400+ automated tests are defined across the pipeline.
Versioned dataset
For 13F, required checks and cover-total reconciliation gate each published release; otherwise the last good release keeps serving.
Investor · agent · application
The Terminal, REST and MCP read the same tables.
Measured query times
Database query time, p95 over the seven days to 2026-09-25: 301 ms in Europe and 219 ms in Asia-Pacific. The workload is dominated by our own gates, probes and benchmarks, and the figures exclude API, network and browser time. Serving tables are counted per replica and include multiple projections of the same facts. Synthetic probes run every 5 minutes; live health is on the status page.
Start free
Data previews in the Terminal are free, and a free account shows every row in the allowed period. An API key on the Free plan gives you 200 calls a day across REST and MCP, 500 rows per request and the most recent quarter; Pro adds full history.