Armata Pharmaceuticals, Inc. (ARMP) ownership: Top institutional holder: Madison Asset Management, LLC ($21.58M). Insider activity: Net Seller (2 buys, 18 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| Madison Asset Management, LLC | 2107675.00 | $21.58M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 366028.00 | $3.75M | 2026-03-31 |
| MILLENNIUM MANAGEMENT LLC | 257992.00 | $2.64M | 2026-03-31 |
| VANGUARD GROUP INC | 357649.00 | $2.25M | 2025-12-31 |
| 683 Capital Management, LLC | 137000.00 | $1.40M | 2026-03-31 |
| GEODE CAPITAL MANAGEMENT, LLC | 114555.00 | $1.17M | 2026-03-31 |
| EDGEWOOD MANAGEMENT LLC | 100000.00 | $1.02M | 2026-03-31 |
| Dauntless Investment Group, LLC | 90580.00 | $927539.00 | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-04-24 | |
| Sell | null | 2026-04-24 | |
| Buy | null | 2026-03-14 | |
| Buy | null | 2026-03-14 | |
| Sell | null | 2026-03-14 | |
| Sell | null | 2026-03-14 | |
| Sell | null | 2026-03-09 | |
| Sell | null | 2026-03-09 |
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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.