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Douglas Kerr

CIK 1814189 · Chief Medical Officer · last filed 2026-08-17

Douglas Kerr is a Chief Medical Officer who has filed 33 SEC Form 4 insider transactions across 2 companies since 2021. The most recent filing shows the insider sold $40.9K of DYN on Aug 17, 2026. Across all open-market trades the lifetime net is −$1.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $4.4M 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.

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Disclosed Exposure

$4.36M

Companies

2

Total Filings

33

Lifetime Open-Market Net

-$1.76M

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
DYN Chief Medical Officer 167,599 $26.00 $4.36M -$210.2K 12 2026-08-17
Generation Bio Co. (GBIO) Delisted CHIEF MEDICAL OFFICER 38,563 $5.34 $205.9K -$1.55M 16 2024-01-31

Recent Filings

33 filings
Insider 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
2026-08-17 DYN Sell (S) −1,556 -$40.9K EDGAR
2026-08-13 DYN Notice (144) −2,443 -$64.2K EDGAR
2026-06-17 DYN Sell (S) −887 -$16.3K EDGAR
2026-05-14 DYN Sell (S) −1,564 -$28.7K EDGAR
2026-03-06 DYN Sell (S) −904 -$13.5K EDGAR
2026-02-17 DYN Grant (A) +85,000 $0 EDGAR
2025-12-05 DYN Notice (144) −880 -$18.2K EDGAR
2025-12-05 DYN Sell (S) −880 -$18.2K EDGAR
2025-09-08 DYN Sell (S) −4,425 -$58.8K EDGAR
2025-09-04 DYN Notice (144) −4,552 -$60.4K EDGAR
Showing 1–10 of 33
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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.