Bain Capital Life Sciences Fund II, L.P.

CIK 1773187 · last filed 2025-02-21

Bain Capital Life Sciences Fund II, L.P. is a corporate insider who has filed 4 SEC Form 4 insider transactions across 1 company since 2025. The most recent filing, for NAMS, was dated Dec 2, 2025. Across all open-market trades the lifetime net is +$40.3M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $36.9M across reported positions. The firm reports its address in Boston, MA. 7 SEC filings were submitted jointly with BCIP Life Sciences Associates, LP.

"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

$36.90M

Companies

1

Total Filings

4

Lifetime Open-Market Net

$40.30M

Filer Profile

Reported Address
200 CLARENDON STREET
BOSTON, MA 02116
Phone
(617) 516-2000
State of Incorporation
Cayman Islands
Related Filers
BCIP Life Sciences Associates, LP — 7 joint filings, latest 2025-02-21
BCLS II Investco, LP — 7 joint filings, latest 2025-02-21
Bain Capital Life Sciences Investors II, LLC — 7 joint filings, latest 2025-02-21
Bain Capital Life Sciences Investors, LLC — 7 joint filings, latest 2025-02-21
Bain Capital Life Sciences Partners, LP — 3 joint filings, latest 2025-02-21
Bain Capital Life Sciences Fund III, L.P. — 2 joint filings, latest 2024-12-17
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
SLDB 10%+ Owner 5,034,582 $7.33 $36.90M $40.30M 1 2025-02-21

Recent Filings

4 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
2025-12-02 NAMS Notice (144) −267,429 -$10.25M EDGAR
2025-07-24 NUVL Notice (144) −1,286,344 -$105.58M EDGAR
2025-02-21 SLDB Buy (P) +10,000,000 $40.30M EDGAR
2024-12-11 NUVL Notice (144) −1,114,286 -$104.31M 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.