First Manhattan Co

SEC CIK: 0000728083
Latest filing: Aug 14, 2026

SEC filings (opens in a new tab)

AMAM holding history

Ambrx Biopharma, Inc. in every 13F filed by First Manhattan Co, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

AMAM overview All 13F holders of AMAM Full Q2 2026 holdings

Shares (Q4 2023): 0; Sold out in Q4 2023
Value: $0
% of portfolio: 0.0%
Quarters held: 2; Since Q2 2023

Holdings of AMAM by First Manhattan Co, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q4 2023	0	$0	0.0%	−135,003−100.0%	Sold out	Holders
Q3 2023	135,003	$1.55M	<0.1%	00.0%	Unchanged	Holders
Q2 2023	135,003	$2.22M	<0.1%	+135,003	New	Holders