PETER N KELLOGG
CIK 1226287 · SEE REMARKS · last filed 2026-05-22
"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
$26.87M
Companies
6
Total Filings
73
Lifetime Open-Market Net
-$322.3K
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 |
|---|---|---|---|---|---|---|---|
| ALNY | Director | 1,446 | $246.11 | $355.9K | $0 | 4 | 2026-05-22 |
| YIELD10 BIOSCIENCE, INC. (YTEN) Delisted | Director | 6 | $0.35 | $2 | $0 | 10 | 2019-05-23 |
| CELGENE CORP /DE/ (CELGZ) Delisted | SEE REMARKS | 49,689 | — | — | $0 | 25 | 2018-08-01 |
| YIELD10 BIOSCIENCE, INC. (MBLX) Delisted | Director | 12,500 | — | — | $0 | 11 | 2015-09-14 |
| MRK | Exe V-P & CFO | 149,553 | $149.86 | $22.41M | $502.4K | 18 | 2014-02-26 |
| BIIB | EVP, Finance and CFO | 18,966 | $216.04 | $4.10M | -$824.7K | 5 | 2007-03-22 |
Recent Filings · Page 8 of 8
73 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 |
|---|---|---|---|---|---|
| 2007-02-15 | BIIB | Sell (S) | −10,202 | -$502.1K | EDGAR |
| 2007-02-14 | BIIB | Grant (A) | +11,500 | $0 | EDGAR |
| 2007-02-08 | BIIB | Mixed | +581 | -$389.2K | EDGAR |
Showing 71–73 of 73
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Page 8 of 8
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.