Vida Ventures GP III, L.L.C.

CIK 1855502 · last filed 2025-09-16

Vida Ventures GP III, L.L.C. is a corporate insider who has filed 2 SEC Form 4 insider transactions across 2 companies since 2024. The most recent filing, for LBRX, was dated Sep 16, 2025. Across all open-market trades the lifetime net is +$47.3M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $33.3M across reported positions. The firm reports its address in San Francisco, CA. 6 SEC filings were submitted jointly with Vida Ventures III, L.P.

"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.

Disclosed Exposure

$33.32M

Companies

2

Total Filings

2

Lifetime Open-Market Net

$47.28M

Filer Profile

Reported Address

455 MARKET STREET, SUITE 1420
SAN FRANCISCO, CA 94105

Phone

(424) 313-1550

State of Incorporation

Related Filers

Vida Ventures III, L.P. — 6 joint filings, latest 2026-08-04

Arie Belldegrun — 2 joint filings, latest 2025-09-16

Attovia Therapeutics, Inc. — 1 joint filings, latest 2026-08-04

Vida Ventures, LLC — 1 joint filings, latest 2024-02-14

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
LBRX	10%+ Owner	1,434	$46.25	$66.3K	$25.00M	1	2025-09-16
KYTX	10%+ Owner	4,523,924	$7.35	$33.25M	$22.28M	1	2024-02-14

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
2025-09-16	LBRX	Mixed	+4,411,215	$25.00M	EDGAR
2024-02-14	KYTX	Mixed	+19,108,240	$22.28M	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.