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WENDELL WIERENGA

CIK 1239956 · last filed 2026-07-16

WENDELL WIERENGA is a corporate insider who has filed 20 SEC Form 4 insider transactions across 3 companies since 2021. The most recent filing shows the insider was granted $6.2K of CYTK on Jul 16, 2026. Across all open-market trades the lifetime net is −$1.9M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $13.1M 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.

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Disclosed Exposure

$13.07M

Companies

3

Total Filings

20

Lifetime Open-Market Net

-$1.88M

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 35,563 $79.79 $2.84M -$1.88M 8 2026-07-16
CRNX Director 122,071 $83.85 $10.24M $0 1 2026-06-22
DRMAW Director 62,398 $0.01 $655 $0 8 2026-01-06

Recent Filings

20 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) +75 $6.2K EDGAR
2026-06-22 CRNX Grant (A) +5,925 $0 EDGAR
2026-05-27 CYTK Grant (A) +2,851 $0 EDGAR
2026-05-05 CYTK Notice (144) −4,032 -$266.3K EDGAR
2026-05-05 CYTK Mixed — -$252.4K EDGAR
2026-04-15 CYTK Grant (A) +95 $6.2K EDGAR
2026-01-16 CYTK Grant (A) +98 $6.2K EDGAR
2026-01-06 DRMAW Grant (A) — $0 EDGAR
2025-12-23 CYTK Mixed — -$1.17M EDGAR
2025-12-22 CYTK Notice (144) −20,000 -$1.25M EDGAR
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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.