BETH C SEIDENBERG
CIK 1184592 · last filed 2026-06-15
BETH C SEIDENBERG is a corporate insider who has filed 108 SEC Form 4 insider transactions across 10 companies since 2007. The most recent filing, for SGMT, was dated Jun 15, 2026. Across all open-market trades the lifetime net is +$67.7M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $42.0M 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.
$42.05M
10
108
$67.69M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| SGMT | Director | 84,768 | $7.27 | $616.3K | $750.0K | 4 | 2026-06-15 |
| KYTX | Director | 3,809,667 | $7.49 | $28.53M | $1000.0K | 4 | 2026-05-29 |
| VERA | Director | 135,565 | $33.32 | $4.52M | $2.90M | 21 | 2026-05-26 |
| ACELYRIN, Inc. (SLRN) Delisted | Director | 9,850,729 | $2.27 | $22.36M | $23.58M | 2 | 2024-06-11 |
| PGNY | Director | 271,322 | $30.76 | $8.35M | -$2.80M | 24 | 2024-05-28 |
| ATRA | Director | 4,636 | $7.81 | $36.2K | $0 | 15 | 2023-06-02 |
| Epizyme, Inc. (EPZM) Delisted | Director | 4,124,036 | $1.47 | $6.06M | -$10.74M | 11 | 2019-07-02 |
| ARMO BioSciences, Inc. (ARMO) Delisted | Director | 0 | — | — | $0 | 3 | 2018-06-22 |
| TESARO, Inc. (TSRO) Delisted | Director | 2,040,675 | — | — | $53.00M | 13 | 2018-06-05 |
| BCRX | Director | — | $9.74 | — | $0 | 4 | 2010-05-17 |
Recent Filings
108 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-06-15 | SGMT | Grant (A) | — | $0 | EDGAR |
| 2026-05-29 | KYTX | Grant (A) | +5,093 | $0 | EDGAR |
| 2026-05-26 | VERA | Grant (A) | — | $0 | EDGAR |
| 2025-12-22 | KYTX | Buy (P) | +133,333 | $1000.0K | EDGAR |
| 2025-06-10 | SGMT | Grant (A) | — | $0 | EDGAR |
| 2025-06-02 | KYTX | Grant (A) | +16,634 | $0 | EDGAR |
| 2025-05-23 | — | Disp (D) | −9,850,729 | $0 | |
| 2025-05-16 | VERA | Grant (A) | — | $0 | EDGAR |
| 2024-12-09 | PGNY | Notice (144) | −39,680 | -$627.6K | EDGAR |
| 2024-10-30 | VERA | Sell (S) | −15,000 | -$720.5K | 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.