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Flagship Ventures Opportunities Fund I, L.P.

CIK 1677345 · last filed 2026-01-15

Flagship Ventures Opportunities Fund I, L.P. is a corporate insider who has filed 1 SEC Form 4 insider transactions across 1 company since 2026. The most recent filing, for FHTX, was dated Jan 15, 2026. The firm reports its address in Cambridge, MA. 20 SEC filings were submitted jointly with NOUBAR AFEYAN.

"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

1

Total Filings

1

Lifetime Open-Market Net

$0

Filer Profile

Reported Address
ONE MEMORIAL DRIVE
7TH FLOOR
CAMBRIDGE, MA 02142
Phone
(617) 868-1888
State of Incorporation
DE
Related Filers
NOUBAR AFEYAN — 20 joint filings, latest 2026-01-15
Flagship Ventures Opportunities Fund I General Partner LLC — 18 joint filings, latest 2026-01-15
Flagship Ventures Fund IV General Partner LLC — 13 joint filings, latest 2022-10-17
Flagship Ventures Fund IV, L.P. — 13 joint filings, latest 2022-10-17
Flagship Ventures Fund V, L.P. — 10 joint filings, latest 2026-01-15
Flagship Ventures Fund IV-Rx, L.P. — 9 joint filings, latest 2022-06-01
Flagship Ventures Fund V General Partner LLC — 8 joint filings, latest 2026-01-15
Flagship Pioneering Inc. — 6 joint filings, latest 2026-01-15
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
FHTX Director — $4.92 — $0 1 2026-01-15

Recent Filings

1 filing
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
2026-01-15 FHTX Grant (A) — $0 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.