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Dennis J. Selkoe

CIK 1582306 · last filed 2026-05-15

Dennis J. Selkoe is a corporate insider who has filed 33 SEC Form 4 insider transactions across 1 company since 2013. The most recent filing, for PRTA, was dated May 15, 2026. Across all open-market trades the lifetime net is −$4.5M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $84.9K 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

$84.9K

Companies

1

Total Filings

33

Lifetime Open-Market Net

-$4.47M

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
PRTA Director 9,208 $9.22 $84.9K -$4.47M 31 2026-05-15

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
2026-05-15 PRTA Grant (A) — $0 EDGAR
2025-05-16 PRTA Grant (A) — $0 EDGAR
2024-05-17 PRTA Grant (A) — $0 EDGAR
2023-07-03 PRTA Notice (144) −5,000 -$337.1K EDGAR
2023-07-03 PRTA Mixed — -$280.5K EDGAR
2023-05-19 PRTA Grant (A) — $0 EDGAR
2023-05-05 PRTA Mixed — -$583.9K EDGAR
2023-05-03 PRTA Notice (144) −15,000 -$855.0K EDGAR
2022-05-27 PRTA Grant (A) — $0 EDGAR
2022-01-05 PRTA Mixed — -$191.1K EDGAR
Showing 1–10 of 33
Page 1 of 4
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.