Kathryn L. Biberstein is CAO & CCO +2 at Alkermes plc. (ALKS). They have made 7 open-market trades across 1 company since 2011, most recently 2026-09-03.
CIK 0001520262
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.
0 open-market purchases, against 7 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| ALKS | 223,422 | $9.2M |
Shares reported on the most recent Form 4, priced at the 2026-09-03 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ALKS | SELL · 10b5-1 | 2026-09-03 | 2026-09-03 | $48.01 | $98K | +0.1% | -7.2% | — |
| ALKS | SELL | 2017-09-11 | 2017-09-13 | $51.29 | $1.4M | -0.7% | -3.6% | +0.0% |
| ALKS | SELL | 2017-04-03 | 2017-04-04 | $57.67 | $1.7M | -3.5% | +2.5% | -0.4% |
| ALKS | SELL | 2016-12-08 | 2016-12-08 | $55.42 | $230K | +1.0% | +6.6% | +2.2% |
| ALKS | SELL | 2016-12-07 | 2016-12-08 | $56.61 | $283K | +1.0% | +6.6% | +2.2% |
| ALKS | SELL | 2016-12-06 | 2016-12-08 | $56.24 | $281K | +1.0% | +6.6% | +2.2% |
| ALKS | SELL | 2016-12-06 | 2016-12-08 | $55.97 | $1.0M | +1.0% | +6.6% | +2.2% |
| ALKS | SELL | 2016-12-01 | 2016-12-02 | $56.13 | $1.7M | -3.0% | -1.1% | +7.8% |
| ALKS | SELL · 10b5-1 | 2015-01-07 | 2015-01-08 | $65.00 | $1.8M | -17.4% | -3.2% | -3.2% |
| ALKS | SELL · 10b5-1 | 2014-12-05 | 2014-12-05 | $57.61 | $889K | -17.4% | -3.2% | -3.2% |
| ALKS | SELL · 10b5-1 | 2014-11-11 | 2014-11-13 | $52.74 | $791K | -17.4% | -3.2% | -3.2% |
| ALKS | SELL · 10b5-1 | 2014-11-06 | 2014-11-07 | $50.54 | $1.0M | -17.4% | -3.2% | -3.2% |
| ALKS | SELL · 10b5-1 | 2014-06-30 | 2014-07-02 | $50.26 | $426K | -17.4% | -3.2% | -3.2% |
| ALKS | SELL · 10b5-1 | 2014-06-17 | 2014-06-18 | $47.41 | $398K | -17.4% | -3.2% | -3.2% |
| ALKS | SELL · 10b5-1 | 2013-04-16 | 2013-04-18 | $26.96 | $1.1M | -17.4% | -3.2% | -3.2% |
| ALKS | SELL · 10b5-1 | 2013-04-12 | 2013-04-12 | $24.61 | $615K | -17.4% | -3.2% | -3.2% |
| ALKS | SELL · 10b5-1 | 2013-01-31 | 2013-02-01 | $23.13 | $243K | -17.4% | -3.2% | -3.2% |
| ALKS | SELL · 10b5-1 | 2011-07-01 | 2011-07-05 | $19.00 | $1.9M | -17.4% | -3.2% | -3.2% |
| ALKS | SELL · 10b5-1 | 2011-05-13 | 2011-05-17 | $18.01 | $2.3M | -17.4% | -3.2% | -3.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.