Alexander J. Denner is Director at BIOGEN INC. (BIIB). They have made 27 open-market trades across 8 companies since 2012, most recently 2026-09-15.
CIK 0001361754
24 open-market purchases totalling $385.6M since 2013, against 3 sales. Across 24 scored buys the stock is up 12.4% at ninety days, and 8.0 points ahead of the S&P over the same stretch.
24 scored purchases · one row per filing · discretionary only
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 67% | 71% | 71% |
| Avg Move | +0.7% | +3.1% | +12.4% |
| Alpha | +0.5% | +0.5% | +8.0% |
| Scored | 24 | 24 | 24 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| IRWD | SELL | 2026-03-17 | 2026-03-17 | $3.05 | $20.5M | -5.0% | +34.5% | +14.6% |
| INVA | SELL | 2025-03-04 | 2025-03-06 | $17.55 | $56.8M | -2.4% | -1.1% | +18.0% |
| INVA | BUY | 2023-06-05 | 2023-06-07 | $13.05 | $196K | -5.7% | -8.5% | -7.4% |
| INVA | BUY | 2023-05-25 | 2023-05-30 | $13.05 | $2.6M | +1.4% | -2.7% | +0.2% |
| INVA | BUY | 2023-05-11 | 2023-05-15 | $12.34 | $3.6M | +0.4% | +2.2% | +3.6% |
| IRWD | BUY | 2021-03-03 | 2021-03-05 | $10.01 | $7.8M | +9.7% | +4.5% | +14.0% |
| IRWD | BUY | 2021-02-26 | 2021-03-02 | $9.44 | $12.7M | +11.5% | +7.2% | +13.9% |
| MDCO | BUY | 2019-06-28 | 2019-06-28 | $33.00 | $1.6M | +3.1% | +0.1% | +35.1% |
| MDCO | BUY | 2019-05-29 | 2019-05-31 | $34.83 | $3.0M | +1.9% | +5.7% | +20.5% |
| MDCO | BUY | 2019-05-20 | 2019-05-22 | $33.89 | $14.6M | +10.9% | +9.1% | -1.6% |
| BIIB | BUY | 2019-04-30 | 2019-05-02 | $229.74 | $38.8M | -1.5% | -4.0% | +2.2% |
| MDCO | BUY | 2019-03-06 | 2019-03-08 | $24.91 | $6.2M | +7.1% | +14.8% | +45.7% |
| MDCO | BUY | 2019-03-01 | 2019-03-05 | $25.59 | $15.5M | +1.6% | +9.2% | +35.4% |
| BIIB | BUY | 2019-01-30 | 2019-02-01 | $327.59 | $20.6M | -3.0% | -1.2% | -30.4% |
| MDCO | BUY | 2018-12-20 | 2018-12-21 | $17.89 | $179K | +8.3% | +14.7% | +63.1% |
| MDCO | BUY | 2018-12-17 | 2018-12-18 | $18.00 | $540K | +1.3% | +5.6% | +43.7% |
| MDCO | BUY | 2018-12-13 | 2018-12-17 | $19.99 | $20.7M | +0.2% | +4.9% | +43.8% |
| BIIB | BUY | 2018-04-25 | 2018-04-27 | $269.91 | $25.9M | -1.3% | +3.4% | +24.2% |
| MDCO | BUY | 2017-11-29 | 2017-11-30 | $30.03 | $5.1M | -6.7% | -8.5% | +4.8% |
| BIIB | BUY | 2017-11-28 | 2017-11-30 | $317.98 | $12.7M | +2.2% | +4.2% | -9.9% |
| BIVV | BUY | 2017-05-30 | 2017-06-01 | $55.93 | $5.0M | +3.3% | +10.2% | -0.7% |
| BIVV | BUY | 2017-05-24 | 2017-05-26 | $55.77 | $51.3M | +0.7% | +6.8% | -2.4% |
| BIIB | BUY | 2017-04-27 | 2017-05-01 | $278.50 | $41.1M | -6.4% | -8.7% | +6.7% |
| BIIB | BUY | 2015-10-22 | 2015-10-26 | $277.47 | $86.0M | -11.0% | -1.9% | -12.7% |
| ARIA | BUY | 2014-08-15 | 2014-08-19 | $5.83 | $5.0M | -13.2% | +0.2% | +0.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.
| ARIA | 40,673 | $1.0M |
| AMLN | 1,104 | — |
| Total | $636.8M |
Shares reported on the most recent Form 4, priced at the 2026-09-17 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.