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MICHAEL JOHN TOMSICEK

CIK 1570392 · Chief Financial Officer · last filed 2026-06-22

MICHAEL JOHN TOMSICEK is a Chief Financial Officer who has filed 42 SEC Form 4 insider transactions across 8 companies since 2013. The most recent filing, for ACRV, was dated Jun 22, 2026. Across all open-market trades the lifetime net is −$5.6M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $120.4K 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

$120.4K

Companies

8

Total Filings

42

Lifetime Open-Market Net

-$5.65M

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
ACRV Director 9,366 $1.54 $14.4K $0 5 2026-06-22
MIST Director 15,000 $1.07 $16.1K $79.8K 8 2026-06-12
CRSP Chief Financial Officer 1,891 $47.55 $89.9K -$5.61M 10 2021-08-10
CRISPR Therapeutics AG (PZRX) Delisted Chief Financial Officer — — — $0 1 2017-11-14
ABIOMED INC (ABMD) Delisted Vice President, CFO 27,081 $381.02 $10.32M $0 3 2017-07-18
ABIOMED INC (APOL) Delisted Vice President, CFO 26,800 — — $0 2 2016-05-26
CUBIST PHARMACEUTICALS INC (CBST.Z) Delisted SVP & Chief Financial Officer 0 — — -$67.7K 6 2015-01-21
CUBIST PHARMACEUTICALS INC (CBST) Delisted SVP & Chief Financial Officer 3,318 — — -$49.6K 7 2013-10-02

Recent Filings

42 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
2026-06-22 ACRV Grant (A) — $0 EDGAR
2026-06-12 MIST Grant (A) — $0 EDGAR
2026-05-20 ACRV Grant (A) +9,366 $0 EDGAR
2025-06-17 ACRV Grant (A) — $0 EDGAR
2025-06-12 MIST Grant (A) — $0 EDGAR
2024-08-29 MIST Grant (A) — $0 EDGAR
2024-06-24 ACRV Grant (A) — $0 EDGAR
2023-06-09 MIST Grant (A) — $0 EDGAR
2022-11-16 ACRV Grant (A) — $0 EDGAR
2022-10-21 MIST Buy (P) +15,000 $79.8K EDGAR
Showing 1–10 of 42
Page 1 of 5
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.