ALKS — Alkermes plc.
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
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Measured signals that fired on ALKS
| date | signal | measured base rate |
|---|---|---|
| 2026-08-21 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-07-13 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-07-07 | Equal highs taken out structure | -0.70% over 21 days · t = -8.28 · n = 68,636 statistically distinguishable from its control group |
| 2026-06-03 | Equal highs taken out structure | -0.70% over 21 days · t = -8.28 · n = 68,636 statistically distinguishable from its control group |
| 2026-05-13 | Fair value gap, bullish structure | -0.67% over 21 days · t = -6.43 · n = 111,973 statistically distinguishable from its control group |
| 2026-05-07 | Bollinger bandwidth breaks out of its own compression structure | -0.63% over 21 days · t = -2.80 · n = 7,196 statistically 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 |
|---|---|---|---|---|---|
| 2026-08-17 | Nichols Christian Todd SVP, Chief Commercial Officer | Open-market sale 10b5-1 plan | 6.9K | 49.19 | 340.0K |
| 2026-08-17 | Nichols Christian Todd SVP, Chief Commercial Officer | Open-market sale 10b5-1 plan | 664 | 49.65 | 33.0K |
| 2026-08-03 | snyderman nancy lynn MD Director | Open-market sale | 44.5K | 50.35 | 2.2M |
| 2026-08-03 | snyderman nancy lynn MD Director | Option exercise | 27.9K | 46.72 | 1.3M |
| 2026-08-03 | snyderman nancy lynn MD Director | Option exercise | 16.5K | 46.72 | 772.0K |
| 2026-08-03 | Hopkinson Craig C. EVP R&D, Chief Medical Officer | Open-market sale 10b5-1 plan | 9.0K | 48.58 | 437.2K |
| 2026-08-03 | Hopkinson Craig C. EVP R&D, Chief Medical Officer | Option exercise 10b5-1 plan | 4.9K | 24.59 | 120.4K |
| 2026-08-03 | Gaffin David Joseph EVP, CLO, Alkermes, Inc. | Open-market sale 10b5-1 plan | 2.0K | 48.58 | 98.8K |
| 2026-08-03 | Hopkinson Craig C. EVP R&D, Chief Medical Officer | Option exercise 10b5-1 plan | 104 | 19.34 | 2.0K |
| 2026-07-06 | Gaffin David Joseph EVP, CLO, Alkermes, Inc. | Open-market sale 10b5-1 plan | 2.0K | 54.03 | 109.9K |
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 |
|---|---|---|
| BlackRock, Inc. | 1.0B | 28.3M |
| BAKER BROS. ADVISORS LP | 354.0M | 10.0M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 336.3M | 9.5M |
| STATE STREET CORP | 334.7M | 9.5M |
| VANGUARD CAPITAL MANAGEMENT LLC | 262.6M | 7.4M |
| RENAISSANCE TECHNOLOGIES LLC | 217.8M | 6.2M |
| AMERICAN CENTURY COMPANIES INC | 214.7M | 6.1M |
| DIMENSIONAL FUND ADVISORS LP | 159.9M | 4.5M |
| Commodore Capital LP | 148.5M | 4.2M |
| GEODE CAPITAL MANAGEMENT, LLC | 147.9M | 4.2M |
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
- Alkermes Plc. (ALKS) filed form 8-K · 2026-08-12 · SEC EDGAR
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