BIOS Fund II, LP

CIK 1714576 · last filed 2024-08-14

BIOS Fund II, LP is a corporate insider who has filed 8 SEC Form 4 insider transactions across 4 companies since 2020. The most recent filing, for LTRN, was dated May 27, 2025. Across all open-market trades the lifetime net is +$18.9M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $865.6K across reported positions. The firm reports its address in Fort Worth, TX. 38 SEC filings were submitted jointly with BIOS Fund II QP, 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.

Disclosed Exposure

$865.6K

Companies

4

Total Filings

8

Lifetime Open-Market Net

$18.87M

Filer Profile

Reported Address

1401 FOCH STREET
SUITE 140
FORT WORTH, TX 76107

Phone

(817) 984-5964

State of Incorporation

Related Filers

BIOS Fund II QP, LP — 38 joint filings, latest 2026-06-22

Bios Equity Partners II, LP — 32 joint filings, latest 2026-06-22

BIOS Fund II NT, LP — 31 joint filings, latest 2025-06-30

BIOS Fund I QP, LP — 28 joint filings, latest 2026-06-22

BIOS Fund I, LP — 28 joint filings, latest 2026-06-22

Bios Equity Partners, LP — 26 joint filings, latest 2026-06-22

Aaron G.L. Fletcher — 25 joint filings, latest 2026-06-22

BIOS Advisors GP, LLC — 24 joint filings, latest 2026-06-22

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
ACTU	Director	84,917	$1.07	$90.9K	$0	1	2024-08-14
CGTX	10%+ Owner	255,765	$0.98	$251.4K	$18.00M	1	2022-11-16
INAB	Director	18,437	$1.07	$19.7K	$868.5K	2	2022-08-18
LTRN	10%+ Owner	294,557	$1.71	$503.7K	$0	1	2020-06-16

Recent Filings

8 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
2025-05-27	LTRN	Notice (144)	−53,454	-$175.9K	EDGAR
2024-08-14	ACTU	—	—	$0	EDGAR
2024-04-26	LTRN	Notice (144)	−124,887	-$666.9K	EDGAR
2024-02-28	LTRN	Notice (144)	−30,650	-$119.8K	EDGAR
2022-11-16	CGTX	Buy (P)	+15,000,000	$18.00M	EDGAR
2022-08-18	INAB	Buy (P)	+450,000	$868.5K	EDGAR
2021-08-03	INAB	Conv (C)	+59,625,918	$0	EDGAR
2020-06-16	LTRN	Mixed	+14,566,480	$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.