MICHAEL JOHN TOMSICEK
CIK 1570392 · Chief Financial Officer · last filed 2026-06-22
"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 · Page 2 of 5
42 filingsInsider 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 |
|---|---|---|---|---|---|
| 2022-08-11 | MIST | Grant (A) | — | $0 | EDGAR |
| 2021-08-10 | CRSP | Mixed | — | -$3.02M | EDGAR |
| 2021-07-29 | MIST | Grant (A) | — | $0 | EDGAR |
| 2021-03-12 | CRSP | Mixed | +1,481 | -$167.9K | EDGAR |
| 2020-10-06 | CRSP | Grant (A) | — | $0 | EDGAR |
| 2020-09-03 | CRSP | Mixed | — | -$894.1K | EDGAR |
| 2020-08-05 | CRSP | Mixed | — | -$827.9K | EDGAR |
| 2020-06-08 | MIST | Grant (A) | — | $0 | EDGAR |
| 2020-03-12 | CRSP | Grant (A) | — | $0 | EDGAR |
| 2019-12-05 | CRSP | Grant (A) | — | $0 | EDGAR |
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.
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.