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CHRISTOPHER Y CHAI

CIK 1413823 · Chief Financial Officer · last filed 2026-05-14

CHRISTOPHER Y CHAI is a Chief Financial Officer who has filed 26 SEC Form 4 insider transactions across 3 companies since 2008. The most recent filing, for SRZNW, was dated May 14, 2026. Across all open-market trades the lifetime net is −$3.3M, making them a net seller over the disclosed history.

"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

$0

Companies

3

Total Filings

26

Lifetime Open-Market Net

-$3.33M

Filer Profile

Reported Address
2400 BAYSHORE PARKWAY
SUITE 200
MOUNTAIN VIEW, CA 94043
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
Surrozen, Inc./DE (SRZNW) Delisted Director — $0.00 — $0 5 2026-05-14
Principia Biopharma Inc. (PRNB) Delisted Chief Financial Officer 0 — — -$1.73M 6 2020-09-28
MAPP SVP, Chief Financial Officer 0 $28.11 $0 -$1.61M 15 2013-03-04

Recent Filings

26 filings
Insider 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
2026-05-14 Surrozen, Inc./DE (SRZNW) Delisted Grant (A) — $0 EDGAR
2025-05-15 Surrozen, Inc./DE (SRZNW) Delisted Grant (A) — $0 EDGAR
2024-06-06 Surrozen, Inc./DE (SRZNW) Delisted Grant (A) — $0 EDGAR
2023-05-19 Surrozen, Inc./DE (SRZNW) Delisted Grant (A) — $0 EDGAR
2022-06-09 Surrozen, Inc./DE (SRZNW) Delisted Grant (A) — $0 EDGAR
2020-09-28 Principia Biopharma Inc. (PRNB) Delisted Mixed −7,101 -$710.1K EDGAR
2020-08-20 Principia Biopharma Inc. (PRNB) Delisted Mixed — -$722.8K EDGAR
2020-05-21 Principia Biopharma Inc. (PRNB) Delisted Mixed −1,825 -$471.3K EDGAR
2020-03-05 Principia Biopharma Inc. (PRNB) Delisted Grant (A) — $0 EDGAR
2020-02-20 Principia Biopharma Inc. (PRNB) Delisted Mixed −5,000 -$486.7K EDGAR
Showing 1–10 of 26
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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.