Form 13F is an SEC quarterly report of long U.S. equity holdings by institutional investment managers with over $100 million in qualifying assets. This 13F filings tracker reads those 13F-HR documents to show ownership shares, portfolio weight, and quarter-over-quarter changes. Research only — not financial advice.

People often search “13 filing” or “13f filing” for the same Form 13F institutional ownership report. This desk links each period’s SEC filing next to the report date so you can open the original 13F-HR document.

For the selected calendar quarter (latest with enough filings by default), each manager is counted once per ticker. A buy is an increase in reported shares versus the prior quarter; a sell is a cut. Price-only moves, puts, calls, and principal (PRN) lines are excluded. Dollar in/out is a secondary sum of reported value changes. Use the quarter menu to screen a prior report period. Research only — not a buy signal.

The desk aligns every tracked manager to the same calendar quarter shown in the timeframe (for example Q2 2025 vs Q1 2025), then ranks tickers by aggregate buy value ($000s reported on Form 13F) from unique funds that increased shares. QoQ change shows net buy minus sell. Research only — not a buy signal.

Share % on a card is the value-weighted change among funds that already held the name (new and full exits are counted separately, not mixed into that %). Weight is the name’s percent of that fund’s 13F book. Violence is a 0–100 score from that share move, weight change, position size, and how many funds moved together — not the loudest single fund. Research only — not a buy or sell signal.

Min/max funds: how many managers moved the name. Share %: value-weighted change among continuing holders (blank for all-new or all-exit). Weight % / weight pp: size and change in those funds’ 13F books. Violence: 0–100 from share move, weight change, size, and fund count. Include blank share % keeps new/exits. Presets: High share %, few funds; One fund; Crowded (5+). Sort picks the rank column. Filters apply to the selected quarter only.

Yes. Ownership charts stay on the latest quarter. The quarter menu on Violent buys & drops screens an older Form 13F-HR period (about two years). KPIs and the violent board switch with that menu. Older quarters can have fewer filers. Research only.

Funds are ranked with a desk score that blends reported 13F portfolio size (AUM), net buy vs sell in the selected quarter, and how many violent position changes they printed. It is a research ranking of filing activity — not a measure of fund returns or alpha.

Charts default to percent of the fund’s reported 13F portfolio (weight) and can switch to share counts. Form 13F does not reliably report percent of a company’s float, so we do not invent that figure.

A curated universe of mega allocators and well-known hedge funds, plus managers already in the desk database and recent Form 13F-HR filers discovered from the SEC current feed (four Atom pages plus amendments, merged over time, capped around 550 for the VPS). Each scan stores up to eight recent filings per manager (about two years), two new XML downloads per tick. Weekly cron refreshes when the backend is free.

No. Educational research from public SEC Form 13F filings. Open the linked filing and the ticker stock page before you act. Not financial advice.