ARMP — Armata Pharmaceuticals, Inc.
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2016-01-04.
Performance
Technicals
Others in Healthcare
Measured signals that fired on ARMP
| date | signal | measured base rate |
|---|---|---|
| 2026-05-15 | Institutional holders jumped in a quarter ownership | -0.52% over 21 days · t = -0.38 · n = 1,553 not distinguishable from its control group |
Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →
Insider transactions (Form 4)
| date | insider | what | shares | price | value |
|---|---|---|---|---|---|
| 2026-07-10 | Birx Deborah Chief Executive Officer | Shares withheld for tax | 14.0K | 4.26 | 59.8K |
| 2026-03-14 | Birx Deborah Chief Executive Officer | Shares withheld for tax | 4.9K | 10.54 | 51.8K |
| 2026-03-14 | Kyme Pierre Chief Business Officer | Shares withheld for tax | 1.0K | 10.54 | 10.9K |
| 2025-07-10 | Birx Deborah Chief Executive Officer | Shares withheld for tax | 13.6K | 2.27 | 31.0K |
| 2025-03-14 | Birx Deborah Chief Executive Officer | Shares withheld for tax | 6.1K | 1.95 | 11.8K |
| 2025-03-14 | Kyme Pierre Chief Business Officer | Shares withheld for tax | 1.0K | 1.95 | 2.0K |
| 2024-07-10 | Birx Deborah Chief Executive Officer | Shares withheld for tax | 22.9K | 2.68 | 61.4K |
| 2024-03-14 | Birx Deborah Chief Executive Officer | Grant or award | 60.0K | 0.00 | 0 |
| 2024-03-14 | Rychlik Richard Corporate Controller and PFO | Grant or award | 10.0K | 0.00 | 0 |
| 2023-12-21 | Birx Deborah Chief Executive Officer | Grant or award | 200.0K | 0.00 | 0 |
Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →
Largest institutional holders
| manager | value | shares |
|---|---|---|
| Madison Asset Management, LLC | 21.6M | 2.1M |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.7M | 366.0K |
| MILLENNIUM MANAGEMENT LLC | 2.6M | 258.0K |
| 683 Capital Management, LLC | 1.4M | 137.0K |
| GEODE CAPITAL MANAGEMENT, LLC | 1.2M | 114.6K |
| EDGEWOOD MANAGEMENT LLC | 1.0M | 100.0K |
| Dauntless Investment Group, LLC | 927.5K | 90.6K |
| SEI INVESTMENTS CO | 759.7K | 74.2K |
| VANGUARD FIDUCIARY TRUST CO | 694.9K | 67.9K |
| BlackRock, Inc. | 666.1K | 65.0K |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
Recent headlines
- Armata Pharmaceuticals, Inc. (ARMP) filed form 8-K · 2026-08-12 · SEC EDGAR
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