M KATHLEEN BEHRENS
CIK 1211701 · last filed 2026-06-05
"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.
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Disclosed Exposure
$4.76M
Companies
5
Total Filings
79
Lifetime Open-Market Net
$10.99M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| SRPT | Director | 224,357 | $17.18 | $3.85M | $193.3K | 28 | 2026-06-05 |
| IGM Biosciences, Inc. (IGMS) Delisted | Director | 0 | $1.27 | $0 | $10.65M | 35 | 2025-08-14 |
| MDXG | Director | 212,771 | $4.27 | $908.5K | $0 | 7 | 2025-06-23 |
| AMYLIN PHARMACEUTICALS INC (AMLN) Delisted | Director | 6,000 | — | — | $0 | 4 | 2012-05-17 |
| Sarepta Therapeutics, Inc. (AVII) Delisted | Director | 18,333 | — | — | $150.0K | 4 | 2011-06-22 |
Recent Filings · Page 2 of 8
79 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2024-07-08 | SRPT | Exer (M) | +15,000 | $208.5K | EDGAR |
| 2024-07-02 | IGM Biosciences, Inc. (IGMS) Delisted | Grant (A) | +3,078 | $0 | EDGAR |
| 2024-06-06 | MDXG | Grant (A) | +23,190 | $168.4K | EDGAR |
| 2024-04-02 | IGM Biosciences, Inc. (IGMS) Delisted | Grant (A) | +3,078 | $0 | EDGAR |
| 2024-03-14 | IGM Biosciences, Inc. (IGMS) Delisted | Grant (A) | — | $0 | EDGAR |
| 2024-03-05 | SRPT | Grant (A) | +1,846 | $0 | EDGAR |
| 2024-01-03 | IGM Biosciences, Inc. (IGMS) Delisted | Grant (A) | +800 | $0 | EDGAR |
| 2023-11-06 | SRPT | Exer (M) | +15,000 | $435.4K | EDGAR |
| 2023-10-03 | IGM Biosciences, Inc. (IGMS) Delisted | Grant (A) | +800 | $0 | EDGAR |
| 2023-07-05 | IGM Biosciences, Inc. (IGMS) Delisted | Grant (A) | +800 | $0 | EDGAR |
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
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.
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.