Peter W. Sonsini
CIK 1559807 · last filed 2022-12-22
Peter W. Sonsini is a corporate insider who has filed 87 SEC Form 4 insider transactions across 32 companies since 2014. The most recent filing, for ACLX, was dated Dec 22, 2022. Across all open-market trades the lifetime net is +$647.0M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $3.80B across reported positions. 35 SEC filings were submitted jointly with FOREST BASKETT.
"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
$3.80B
Companies
32
Total Filings
87
Lifetime Open-Market Net
$646.98M
Filer Profile
Reported Address
2855 SAND HILL ROADMENLO PARK, CA 94025
Related Filers
FOREST BASKETT — 35 joint filings, latest 2023-01-04
SCOTT D SANDELL — 35 joint filings, latest 2023-01-04
Anthony A. Florence Jr. — 31 joint filings, latest 2022-08-05
NEA 14 GP, LTD — 25 joint filings, latest 2023-01-04
NEA Partners 14, L.P. — 25 joint filings, latest 2023-01-04
New Enterprise Associates 14, L.P. — 24 joint filings, latest 2023-01-04
PATRICK J KERINS — 22 joint filings, latest 2023-01-04
Mohamad Makhzoumi — 11 joint filings, latest 2022-06-23
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses.
View filings on SEC EDGAR.
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 |
|---|---|---|---|---|---|---|---|
| Arcellx, Inc. (ACLX) Delisted | 10%+ Owner | 4,850,214 | $115.07 | $558.11M | $190.00M | 2 | 2022-12-22 |
| Akouos, Inc. (AKUS) Delisted | 10%+ Owner | 0 | $13.29 | $0 | $10.00M | 2 | 2022-12-02 |
| IONQ.WS | 10%+ Owner | 0 | $25.41 | $0 | $0 | 1 | 2022-11-18 |
| AVEO PHARMACEUTICALS, INC. (AVEO) Delisted | 10%+ Owner | 24 | $15.00 | $360 | $24.62M | 17 | 2022-10-21 |
| NeueHealth, Inc. (BHG) Delisted | 10%+ Owner | 278,608 | $16.35 | $4.56M | $35.00M | 3 | 2022-10-19 |
| GENOCEA BIOSCIENCES, INC. (GNCA) Delisted | 10%+ Owner | 0 | $0.00 | $0 | $21.03M | 4 | 2022-05-26 |
| HOOD | Director | 30,431 | $112.57 | $3.43M | $0 | 5 | 2022-05-04 |
| TRVI | 10%+ Owner | 10,421,428 | $15.90 | $165.70M | $31.80M | 4 | 2022-04-13 |
| Metacrine, Inc. (MTCR) Delisted | 10%+ Owner | 2,734,189 | $0.49 | $1.35M | $9.51M | 2 | 2021-12-27 |
| GLUE | 10%+ Owner | 5,973,296 | $14.07 | $84.04M | $19.95M | 1 | 2021-06-30 |
| Desktop Metal, Inc. (DM) Delisted | 10%+ Owner | 5 | $4.96 | $25 | $0 | 1 | 2021-06-10 |
| Eargo, Inc. (EAR) Delisted | 10%+ Owner | 1,500 | $2.57 | $3.9K | $5.60M | 2 | 2021-05-26 |
| OnKure Therapeutics, Inc. (RPHM) Delisted | 10%+ Owner | 478,549 | $18.20 | $8.71M | $90.00M | 1 | 2021-04-15 |
| MRKR | 10%+ Owner | 1,071,428 | $1.15 | $1.23M | $10.00M | 1 | 2021-03-18 |
| Regulus Therapeutics Inc. (RGLS) Delisted | 10%+ Owner | 645,106 | $8.16 | $5.26M | $3.96M | 3 | 2020-12-07 |
| Mersana Therapeutics, Inc. (MRSN) Delisted | 10%+ Owner | 30 | $29.08 | $872 | $150.00M | 4 | 2020-09-16 |
| Inozyme Pharma, Inc. (INZY) Delisted | 10%+ Owner | 2,187,689 | $4.00 | $8.75M | $4.00M | 1 | 2020-07-28 |
| NKTX | 10%+ Owner | 522,639 | $2.91 | $1.52M | $12.00M | 1 | 2020-07-16 |
| Surface Oncology, Inc. (SURF) Delisted | 10%+ Owner | 6,072,421 | $1.07 | $6.50M | -$10.28M | 2 | 2020-05-22 |
| Adaptimmune Therapeutics PLC (ADAP) Delisted | 10%+ Owner | 82,978,668 | $0.06 | $4.80M | $5.00M | 1 | 2020-01-28 |
| ARDX | 10%+ Owner | 3,082,186 | $3.58 | $11.03M | $23.33M | 4 | 2019-12-09 |
| MIRM | 10%+ Owner | 3,736,243 | $98.22 | $366.97M | $6.75M | 1 | 2019-07-24 |
| ASND | 10%+ Owner | 12,000,000 | $263.51 | $3.16B | $49.02M | 4 | 2018-09-10 |
| Oruka Therapeutics, Inc. (ABIO) Delisted | 10%+ Owner | 0 | $28.80 | $0 | -$731.3K | 1 | 2018-02-27 |
| Cascadian Therapeutics, Inc. (CASC) Delisted | 10%+ Owner | 10,882,574 | — | — | $0 | 1 | 2018-02-22 |
| APPN | 10%+ Owner | 27,581 | $34.76 | $958.7K | -$66.07M | 4 | 2018-02-15 |
| SYNLOGIC, INC. (SYBX) Delisted | 10%+ Owner | 281,929 | $0.69 | $194.5K | $0 | 2 | 2018-01-26 |
| MULESOFT, INC (MULE) Delisted | 10%+ Owner | 12,679,970 | — | — | $0 | 1 | 2017-03-22 |
| Achaogen, Inc. (AKAO) Delisted | 10%+ Owner | 5,215,128 | — | — | $13.50M | 2 | 2016-12-19 |
| Avalo Therapeutics, Inc. (CERC.U) Delisted | 10%+ Owner | 594,245 | — | — | $0 | 1 | 2015-10-20 |
| SYNLOGIC, INC. (MIRN) Delisted | 10%+ Owner | 2,082,725 | — | — | $6.00M | 1 | 2015-10-06 |
| Loxo Oncology, Inc. (LOXO) Delisted | 10%+ Owner | 1,789,420 | — | — | $3.00M | 1 | 2014-08-06 |
Recent Filings
87 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 |
|---|---|---|---|---|---|
| 2022-12-22 | Arcellx, Inc. (ACLX) Delisted | Other (J) | −1,999,179 | $0 | EDGAR |
| 2022-12-02 | Akouos, Inc. (AKUS) Delisted | U | −4,294,207 | $0 | EDGAR |
| 2022-11-18 | IONQ.WS | Other (J) | −11,687,067 | $0 | EDGAR |
| 2022-10-21 | AVEO PHARMACEUTICALS, INC. (AVEO) Delisted | Other (J) | −3,951,334 | $0 | EDGAR |
| 2022-10-19 | NeueHealth, Inc. (BHG) Delisted | Buy (P) | — | $0 | EDGAR |
| 2022-05-26 | GENOCEA BIOSCIENCES, INC. (GNCA) Delisted | Sell (S) | −10,376,936 | -$750.7K | EDGAR |
| 2022-05-04 | HOOD | Other (J) | −23,813,965 | $0 | EDGAR |
| 2022-04-13 | TRVI | Buy (P) | +3,580,526 | $6.80M | EDGAR |
| 2022-02-09 | Arcellx, Inc. (ACLX) Delisted | Mixed | +51,462,096 | $190.00M | EDGAR |
| 2022-02-01 | HOOD | Other (J) | −23,856,861 | $0 | EDGAR |
Showing 1–10 of 87
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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.