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Westlake BioPartners GP I, LLC

CIK 2007650 · last filed 2026-08-11

Westlake BioPartners GP I, LLC is a corporate insider who has filed 2 SEC Form 4 insider transactions across 2 companies since 2025. The most recent filing, for LTGO, was dated Aug 11, 2026. Across all open-market trades the lifetime net is +$4.0M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $27.8M across reported positions. The firm reports its address in Westlake Village, CA. 5 SEC filings were submitted jointly with Westlake BioPartners Opportunity GP I, LLC.

"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

$27.84M

Companies

2

Total Filings

2

Lifetime Open-Market Net

$4.00M

Filer Profile

Reported Address
3075 TOWNSGATE ROAD, SUITE 140
WESTLAKE VILLAGE, CA 91361
Phone
(805) 465-9588
State of Incorporation
DE
Related Filers
Westlake BioPartners Opportunity GP I, LLC — 5 joint filings, latest 2026-08-11
Sean E Harper — 2 joint filings, latest 2024-02-14
Westlake BioPartners Fund II, L.P. — 2 joint filings, latest 2026-08-11
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
Latigo Biotherapeutics, Inc. (LTGO) Delisted 10%+ Owner 5,160,847 — — $0 1 2026-08-11
KYTX 10%+ Owner 3,787,940 $7.35 $27.84M $4.00M 1 2025-12-22

Recent Filings

2 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
2026-08-11 Latigo Biotherapeutics, Inc. (LTGO) Delisted Conv (C) +76,171,830 $0 EDGAR
2025-12-22 KYTX Buy (P) +533,332 $4.00M 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.