Tananbaum James B.

SEC CIK: 0001581754

SEC filings (opens in a new tab)

In the past year, 4 open-market purchase filings worth $13.1M and no sales.

Current role at each company

LTGO Latigo Biotherapeutics, Inc.Director, 10% Owneras of Aug 10, 2026
ALMS Alumis Inc.Director, 10% Owneras of Apr 3, 2026
KNTE Kinnate Biopharma Inc.Director, 10% Owneras of Apr 5, 2024
PRDS Pardes Biosciences, Inc.President and CEOas of Aug 31, 2023
THRX Theseus Pharmaceuticals, Inc.10% Owneras of Jul 19, 2023

Show 2 more companies

ACRS Aclaris Therapeutics, Inc.10% Owneras of Nov 3, 2021
IRON Disc Medicine, Inc.Director, 10% Owneras of Oct 6, 2021

Open-market trades in the past year

Open-market purchases (P) and sales (S) filed in the last 365 days, not counting derivative securities or duplicate filings. Values leave out price outliers.

Bought: $13.1M; 4 filings
Sold: –; 0 filings
Net: +$13.1M; Bought minus sold
Companies: 2; With open-market trades

Trades

Every Form 4 that lists Tananbaum James B. as a reporting owner, including filings made jointly with others, grouped by company. Each row adds up one type of transaction in one filing. Only open-market purchases (P) and sales (S) are shown by default.

Transaction type

Role

Minimum value (USD)

Filed from

Filed to

Filing delay at least (days)

Filing delay at most (days)

LTGO Latigo Biotherapeutics, Inc.

Director, 10% Owner1 trade

Insider trades
Filed (ET)	Trade date	Filing delay	Insider	Transaction	Shares	Avg price	Value	Holding change	Flags
Aug 10, 2026 (view filing)8:00 PM ET	Aug 10	Same day	Tananbaum James B.Director, 10% Owner	PPurchase	+140.0K	$18.00	+$2.52M	+7.5%2.01M after

ALMS Alumis Inc.

Director, 10% Owner5 trades

Insider trades
Filed (ET)	Trade date	Filing delay	Insider	Transaction	Shares	Avg price	Value	Holding change	Flags
Jan 12, 2026 (view filing)	Jan 8	4 days	Tananbaum James B.Director, 10% Owner	PPurchase	+411.8K	$17.00	+$7.00M	+16.5%2.91M after	2 lots
Nov 25, 2025 (view filing)	Nov 21	4 days	Tananbaum James B.Director, 10% Owner	PPurchase	+72.2K	$7.38	+$532.9K	+2.8%2.61M after
Nov 19, 2025 (view filing)	Nov 17-19	2 days	Tananbaum James B.Director, 10% Owner	PPurchase	+507.9K	$6.09	+$3.09M	+25.0%2.54M after	4 lots
May 6, 2025 (view filing)	May 2-6	4 days	Tananbaum James B.Director, 10% Owner	PPurchase	+45.0K	$4.50	+$202.3K	+1.1%4.25M after	2 lots
Jul 3, 2024 (view filing)	Jul 1	2 days	Tananbaum James B.Director, 10% Owner	PPurchase	+2.50M	$16.00	+$40.0M	+146.8%4.20M after	2 lots

THRX Theseus Pharmaceuticals, Inc.

10% Owner2 trades

Insider trades
Filed (ET)	Trade date	Filing delay	Insider	Transaction	Shares	Avg price	Value	Holding change	Flags
Jul 19, 2023 (view filing)2:54 PM ET	Jul 17	2 days	Tananbaum James B. and 4 others10% Owner	PPurchase	+700.0K	$2.97	+$2.08M	+102.1%1.39M after	2 lots
Jan 3, 2023 (view filing)4:24 PM ET	Dec 29, 2022	5 days	Tananbaum James B. and 4 others10% Owner	PPurchase	+500.0K	$5.00	+$2.50M	+70.5%1.21M after	2 lots

KNTE Kinnate Biopharma Inc.