Adaptive Biotechnologies Corporation (ADPT) ownership: Top institutional holder: VIKING GLOBAL INVESTORS LP ($416.31M). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VIKING GLOBAL INVESTORS LP | 29993708.00 | $416.31M | 2026-03-31 |
| BlackRock, Inc. | 13303025.00 | $184.65M | 2026-03-31 |
| VANGUARD GROUP INC | 11282152.00 | $183.22M | 2025-12-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 6094144.00 | $84.59M | 2026-03-31 |
| WESTFIELD CAPITAL MANAGEMENT CO LP | 5436718.00 | $75.46M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 4491474.00 | $62.34M | 2026-03-31 |
| Invesco Ltd. | 4450066.00 | $61.77M | 2026-03-31 |
| WELLINGTON MANAGEMENT GROUP LLP | 3857422.00 | $53.54M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-11 | |
| Sell | null | 2026-06-04 | |
| Sell | null | 2026-06-04 | |
| Sell | null | 2026-06-04 | |
| Sell | null | 2026-06-04 | |
| Sell | null | 2026-06-04 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.