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Sean A. McCarthy

CIK 1654058 · CEO · last filed 2026-03-19

Sean A. McCarthy is a CEO who has filed 71 SEC Form 4 insider transactions across 1 company since 2016. The most recent filing shows the insider sold $764.1K of CTMX on Mar 19, 2026. Across all open-market trades the lifetime net is −$8.9M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $4.0M 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.

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Disclosed Exposure

$3.97M

Companies

1

Total Filings

71

Lifetime Open-Market Net

-$8.95M

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
CTMX CEO 1,172,080 $3.39 $3.97M -$8.95M 70 2026-03-19

Recent Filings

71 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
2026-03-19 CTMX Sell (S) −118,969 -$764.1K EDGAR
2026-02-04 CTMX Grant (A) +210,000 $0 EDGAR
2025-11-10 CTMX Sell (S) −101,793 -$461.9K EDGAR
2025-11-06 CTMX Notice (144) −101,793 -$461.9K EDGAR
2025-09-30 CTMX Grant (A) — $0 EDGAR
2025-06-17 CTMX Mixed +94,489 -$149.3K EDGAR
2025-03-20 CTMX Sell (S) −37,656 -$22.6K EDGAR
2025-02-06 CTMX Grant (A) +375,000 $0 EDGAR
2024-08-22 CTMX Mixed +23,602 -$17.1K EDGAR
2024-03-28 CTMX Exer (M) +109,768 $172.9K EDGAR
Showing 1–10 of 71
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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.