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Jon Marc Wigginton

CIK 1587487 · Chief Medical Officer · last filed 2026-06-09

Jon Marc Wigginton is a Chief Medical Officer who has filed 38 SEC Form 4 insider transactions across 4 companies since 2014. The most recent filing, for STRO, was dated Jun 9, 2026. Across all open-market trades the lifetime net is −$4.1M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $76.5K 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

$76.5K

Companies

4

Total Filings

38

Lifetime Open-Market Net

-$4.09M

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
STRO Director — $20.82 — $0 8 2026-06-09
Checkmate Pharmaceuticals, Inc. (CMPI) Delisted Director — $10.50 — $0 2 2022-05-31
CGEM Chief Medical Officer — $21.79 — $0 1 2021-01-11
MGNX Sr VP, Clinical Dev. & CMO 18,930 $4.04 $76.5K -$4.09M 27 2020-02-24

Recent Filings

38 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
2026-06-09 STRO Grant (A) — $0 EDGAR
2025-12-29 STRO Grant (A) — $0 EDGAR
2025-06-10 STRO Grant (A) — $0 EDGAR
2024-06-10 STRO Grant (A) — $0 EDGAR
2023-06-12 STRO Grant (A) — $0 EDGAR
2022-06-08 STRO Grant (A) — $0 EDGAR
2022-05-31 Checkmate Pharmaceuticals, Inc. (CMPI) Delisted Disp (D) — $0 EDGAR
2022-02-01 Checkmate Pharmaceuticals, Inc. (CMPI) Delisted Grant (A) — $0 EDGAR
2021-06-07 STRO Grant (A) — $0 EDGAR
2021-01-11 CGEM Grant (A) — $0 EDGAR
Showing 1–10 of 38
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.