Home

JOHN C MARTIN

CIK 1190578 · Executive Chairman · last filed 2021-03-05

JOHN C MARTIN is an Executive Chairman who has filed 190 SEC Form 4 insider transactions across 4 companies since 2007. The most recent filing, for SRPT, was dated Mar 5, 2021. Across all open-market trades the lifetime net is −$1.00B, making them a net seller over the disclosed history. Current disclosed insider exposure totals $468.1M 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.

Loading insider history…
Disclosed Exposure

$468.12M

Companies

4

Total Filings

190

Lifetime Open-Market Net

-$1.00B

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
SRPT Director 7,913 $15.68 $124.1K $0 2 2021-03-05
Kronos Bio, Inc. (KRON) Delisted Director 914,333 $0.88 $804.6K $1.44M 1 2020-10-16
GILD Director 3,619,142 $129.31 $467.99M -$1.00B 163 2019-02-08
GPRO Director 0 $0.67 $0 $0 24 2012-08-02

Recent Filings

190 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
2021-03-05 SRPT Grant (A) +2,726 $0 EDGAR
2020-10-16 Kronos Bio, Inc. (KRON) Delisted Mixed +1,952,364 $4.76M EDGAR
2020-02-28 SRPT Grant (A) +5,187 $0 EDGAR
2019-02-08 GILD Mixed +9,463 -$947.9K EDGAR
2018-12-04 GILD Mixed −140,000 -$2.38M EDGAR
2018-11-05 GILD Mixed — -$2.30M EDGAR
2018-10-03 GILD Mixed — -$2.72M EDGAR
2018-09-06 GILD Mixed — -$2.53M EDGAR
2018-08-03 GILD Mixed — -$2.71M EDGAR
2018-07-05 GILD Mixed — -$2.36M EDGAR
Showing 1–10 of 190
Page 1 of 19
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.