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JOHN T HENDERSON

CIK 1226488 · last filed 2026-07-16

JOHN T HENDERSON is a corporate insider who has filed 109 SEC Form 4 insider transactions across 3 companies since 2007. The most recent filing shows the insider was granted $22.5K of CYTK on Jul 16, 2026. Across all open-market trades the lifetime net is −$11.0M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $5.4M across reported positions. 30 SEC filings were submitted jointly with MYRIAD GENETICS 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.

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Disclosed Exposure

$5.40M

Companies

3

Total Filings

109

Lifetime Open-Market Net

-$11.05M

Filer Profile

Reported Address
C/O CYTOKINETICS, INCORPORATED
350 OYSTER POINT BLVD
SOUTH SAN FRANCISCO, CA 94080
Related Filers
MYRIAD GENETICS INC — 30 joint filings, latest 2019-12-06
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
CYTK Director 78,443 $64.76 $5.08M -$5.67M 73 2026-07-16
MYGN Director 78,090 $4.14 $323.7K -$5.38M 23 2019-12-06
Myrexis, Inc. (MYRX) Delisted Director 33,575 — — $0 4 2013-01-25

Recent Filings

109 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
2026-07-16 CYTK Grant (A) +272 $22.5K EDGAR
2026-05-27 CYTK Grant (A) +2,851 $0 EDGAR
2026-05-05 CYTK Notice (144) −20,000 -$1.32M EDGAR
2026-05-05 CYTK Mixed — -$1.37M EDGAR
2026-04-15 CYTK Grant (A) +325 $21.2K EDGAR
2026-01-16 CYTK Grant (A) +334 $21.2K EDGAR
2025-12-02 CYTK Notice (144) −8,750 -$577.9K EDGAR
2025-12-02 CYTK Mixed — -$471.6K EDGAR
2025-10-16 CYTK Grant (A) +338 $21.2K EDGAR
2025-07-16 CYTK Grant (A) +559 $21.2K EDGAR
Showing 1–10 of 109
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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.