Mark P Stevenson
CIK 1387890 · Retiring Executive VP & COO · last filed 2026-03-02
"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
$39.68M
Companies
4
Total Filings
68
Lifetime Open-Market Net
-$132.72M
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 |
|---|---|---|---|---|---|---|---|
| IR | Director | 11,705 | $84.15 | $985.0K | $0 | 8 | 2026-03-02 |
| TMO | Retiring Executive VP & COO | 67,461 | $573.52 | $38.69M | -$132.90M | 39 | 2022-03-01 |
| LIFE | President & COO | 0 | $20.07 | $0 | $181.0K | 16 | 2014-02-04 |
| APPLIED BIOSYSTEMS INC. (CRA) Delisted | Vice President | 3,469 | — | — | $0 | 2 | 2007-08-20 |
Recent Filings · Page 4 of 7
68 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 |
|---|---|---|---|---|---|
| 2019-03-01 | TMO | Tax (F) | −2,129 | -$552.6K | EDGAR |
| 2019-02-28 | TMO | Mixed | +19,053 | -$1.02M | EDGAR |
| 2018-08-30 | TMO | Tax (F) | −1,156 | -$275.1K | EDGAR |
| 2018-08-28 | TMO | Tax (F) | −3,596 | -$845.9K | EDGAR |
| 2018-03-01 | TMO | Mixed | +19,356 | -$1.04M | EDGAR |
| 2018-02-27 | TMO | Tax (F) | −1,610 | -$340.9K | EDGAR |
| 2017-09-11 | TMO | Grant (A) | — | $0 | EDGAR |
| 2017-08-29 | TMO | Tax (F) | −815 | -$145.4K | EDGAR |
| 2017-08-28 | TMO | Tax (F) | −6,645 | -$1.18M | EDGAR |
| 2017-03-02 | TMO | Mixed | +22,509 | -$357.3K | 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.