See what insiders and institutions are actually doing.
Market Riddle turns raw SEC filings into ranked, browsable intelligence — corporate insider buys and sells, and the moves of the world's biggest funds. Free to explore, with alerts and a data API when you need more.
Top moves right now
All activity →| Date | Actor | Action | Company | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Jun 11, 2026 | RA Capital Management, L.P. Director | Buy | PBLS Parabilis Medicines, Inc. Voting Common Stock | $394.57M | +19.7M +300.89% | 26,285,093 21.56% of shares | high |
| May 11, 2026 | RA Capital Management, L.P. Director | Buy | ARTV Artiva Biotherapeutics, Inc. Common Stock | $75.00M | +6.5M +74.89% | 15,203,995 31.10% of shares | high |
| Apr 2, 2026 | Portnoy Adam D. Director | Buy | Service Properties Trust Common Shares of Beneficial Interest | $50.00M | +41.7M | 41,666,666 32.17% of shares | high |
| Apr 30, 2026 | Volkswagen AG 10% owner | Buy | RIVN Rivian Automotive, Inc. / DE Class A common stock, par value $0.001 per share | $999.94M | +62.9M +42.82% | 209,769,645 14.49% of shares | high |
| May 15, 2026 | Blackstone Treasury Holdings III L.L.C. 10% owner | Buy | BXDC Blackstone Digital Infrastructure Trust Inc. Common Stock | $182.24M | +9.1M +182235900.00% | 9,111,800 9.05% of shares | high |
| Apr 30, 2026 | Ackman William a CEO | Buy | PSUS Pershing Square USA, Ltd. Common Shares of Beneficial Interest | $175.00M | +3.5M | 3,500,000 | high |
Top funds
Biggest moves →| Manager | 13F value |
|---|---|
| BlackRock, Inc. | $6.73T |
| State Street Corporation | $3.37T |
| LPL Financial LLC | $445.10B |
| Deutsche Bank AG | $344.43B |
| The PNC Financial Services Group, Inc. | $201.76B |
| Mitsubishi UFJ Asset Management Co., Ltd. | $180.42B |
| Victory Capital Management, Inc. | $178.34B |
| Alphabet Inc. | $99.08B |
Follow the biggest players
Browse institutions →Track how the world's largest funds and corporate insiders move — every Form 4 and 13F, ranked by impact and cross-linked so you can follow a stock, a person, or a fund.
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