Mark Stejbach is SVP/Chief Comm Off & Alks Inc at Alkermes plc. (ALKS). They have made 5 open-market trades across 4 companies since 2010, most recently 2026-05-13.
CIK 0001487937
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
5 open-market purchases totalling $99K since 2010, never a sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| ALKS | 51,065 | $2.1M |
| INDV | 27,087 | $878K |
| FLXN | 12,631 | $304K |
| TNGN | 28,663 | — |
| Total | $3.3M |
Shares reported on the most recent Form 4, priced at the 2026-05-14 close. 1 holding could not be priced and is excluded from the total.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| INDV | BUY | 2026-01-05 | 2026-01-07 | $35.39 | $27K | -10.5% | -6.7% | -17.2% |
| FLXN | BUY | 2020-05-26 | 2020-05-27 | $9.75 | $20K | +19.7% | +16.8% | +7.2% |
| ALKS | SELL · 10b5-1 | 2018-02-16 | 2018-02-21 | $70.50 | $767K | -2.6% | -5.2% | -25.9% |
| FLXN | BUY | 2017-06-16 | 2017-06-20 | $17.02 | $27K | +10.5% | +28.9% | +38.3% |
| ALKS | SELL · 10b5-1 | 2017-06-08 | 2017-06-08 | $60.34 | $603K | -5.4% | -3.9% | -17.6% |
| ALKS | SELL · 10b5-1 | 2017-01-09 | 2017-01-10 | $60.27 | $33K | -4.4% | -6.5% | -0.2% |
| ALKS | SELL · 10b5-1 | 2017-01-04 | 2017-01-06 | $60.05 | $568K | -7.1% | -8.3% | -4.7% |
| ALKS | SELL · 10b5-1 | 2015-12-28 | 2015-12-28 | $80.24 | $802K | -17.4% | -58.1% | -60.9% |
| ALKS | SELL · 10b5-1 | 2015-12-01 | 2015-12-02 | $72.17 | $1.3M | -17.4% | -3.2% | -55.5% |
| ALKS | SELL · 10b5-1 | 2015-11-02 | 2015-11-04 | $72.07 | $1.3M | -17.4% | -3.2% | -57.2% |
| ALKS | BUY | 2012-11-13 | 2012-11-19 | $20.13 | $24K | -17.4% | -3.2% | -3.2% |
| TNGN | BUY | 2010-04-09 | 2010-04-13 | $5.00 | $500 | N/A | N/A | N/A |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.