Thomas DesRosier
CIK 1435744 · See Remarks · last filed 2026-07-10
"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
$489.2K
Companies
5
Total Filings
45
Lifetime Open-Market Net
-$1.03M
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 |
|---|---|---|---|---|---|---|---|
| MCRB | See Remarks | 8,033 | $4.74 | $38.1K | -$92.5K | 25 | 2026-07-10 |
| ARIAD PHARMACEUTICALS INC (ARIA) Delisted | EVP, General Counsel | 55,000 | — | — | $0 | 3 | 2016-03-30 |
| CUBIST PHARMACEUTICALS INC (CBST.Z) Delisted | EVP, Chief Legal | 0 | — | — | $0 | 7 | 2015-01-21 |
| CUBIST PHARMACEUTICALS INC (CBST) Delisted | SVP, Chief Legal Officer & GC | 191 | — | — | $0 | 3 | 2013-10-02 |
| GENZ | Sr VP, General Counsel | 11,571 | $38.99 | $451.2K | -$937.1K | 7 | 2011-04-06 |
Recent Filings · Page 5 of 5
45 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 |
|---|---|---|---|---|---|
| 2010-05-26 | GENZ | Mixed | +3,861 | -$89.9K | EDGAR |
| 2009-05-26 | GENZ | Grant (A) | — | $0 | EDGAR |
| 2009-04-29 | GENZ | Disc (I) | +3,772 | $196.5K | EDGAR |
| 2008-08-08 | GENZ | Mixed | — | -$847.2K | EDGAR |
| 2008-05-27 | GENZ | Grant (A) | — | $0 | EDGAR |
Showing 41–45 of 45
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Page 5 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.
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.