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 $546.7M across reported positions. 194 SEC filings were submitted jointly with GILEAD SCIENCES, INC.

"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

$546.65M

Companies

4

Total Filings

190

Lifetime Open-Market Net

-$1.00B

Filer Profile

Reported Address
333 LAKESIDE DRIVE
FOSTER CITY, X1 94404
Related Filers
GILEAD SCIENCES, INC. — 194 joint filings, latest 2019-02-08
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
SRPT Director 7,913 $22.50 $178.0K $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 $151.00 $546.47M -$1.00B 163 2019-02-08
GPRO Director 0 $1.70 $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.