Insider transactions

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 $2.9M 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
$2.95M
Companies
1
Total Filings
71
Lifetime Open-Market Net
-$8.95M

Charts

Trading activity, where the exposure sits, and each trade against the stock price.

Filer Profile

Reported Address
343 OYSTER POINT BLVD.
SUITE 100
SOUTH SAN FRANCISCO, CA 94080
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

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 $2.52 $2.95M -$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.