STEPHEN A SHERWIN
CIK 1079462 · Chairman and CEO · last filed 2026-06-11
STEPHEN A SHERWIN is a Chairman and CEO who has filed 105 SEC Form 4 insider transactions across 9 companies since 2007. The most recent filing, for BIIB, was dated Jun 11, 2026. Across all open-market trades the lifetime net is −$28.7M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $8.8M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$8.78M
9
105
-$28.66M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| BIIB | Director | 15,193 | $207.09 | $3.15M | -$10.17M | 30 | 2026-06-11 |
| NBIX | Director | 30,860 | $182.50 | $5.63M | -$18.51M | 40 | 2026-06-09 |
| CHINOOK THERAPEUTICS, INC. (ADRO) Delisted | Director | — | — | — | $0 | 6 | 2020-05-28 |
| Neon Therapeutics, Inc. (NTGN) Delisted | Director | 0 | — | — | $0 | 2 | 2020-05-06 |
| RIGL | Director | — | $39.83 | — | $0 | 9 | 2016-05-12 |
| VSTM | Director | 208 | $6.14 | $1.3K | $21.4K | 4 | 2015-06-16 |
| Fresh Tracks Therapeutics, Inc. (VICL) Delisted | Director | 3,143 | — | — | $70 | 2 | 2015-05-26 |
| ANI PHARMACEUTICALS INC (BPAX) Delisted | Director | 15,374 | — | — | $0 | 4 | 2012-03-30 |
| CELL GENESYS INC (CEGE) Delisted | Chairman and CEO | 30,000 | — | — | $0 | 4 | 2009-10-15 |
Recent Filings
105 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-06-11 | BIIB | Grant (A) | +1,505 | $0 | EDGAR |
| 2026-06-09 | NBIX | Mixed | — | -$2.53M | EDGAR |
| 2026-06-05 | NBIX | Notice (144) | −25,000 | -$4.18M | EDGAR |
| 2026-05-29 | NBIX | Grant (A) | — | $0 | EDGAR |
| 2026-05-21 | NBIX | Exer (M) | +3,318 | $0 | EDGAR |
| 2025-09-03 | NBIX | Gift (G) | −1,000 | $0 | EDGAR |
| 2025-06-18 | BIIB | Grant (A) | +2,370 | $0 | EDGAR |
| 2025-05-22 | NBIX | Mixed | +2,869 | $0 | EDGAR |
| 2025-03-10 | BIIB | Sell (S) | −8,760 | -$1.31M | EDGAR |
| 2025-03-07 | BIIB | Notice (144) | −8,760 | -$1.29M | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.