Arbiter Partners Capital Management LLC

Position in RNA — Atrium Therapeutics, Inc.

CIK 1513193 NEW YORK, NY

Position in RNA

as of Jun 30, 2026 · filed Aug 19, 2026 Compact

Position Value

$3,514,323

+$439,223 QoQ

Shares Held

261,288

+13.6% QoQ

Ownership

1.53%

of shares outstanding

% of Portfolio

1.95%

of 13F equity value

Holder Rank

#12

of 154 holders

Holding Since

Mar 2026

2 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Healthcare · as of Jun 30, 2026

Arbiter Partners Capital Management LLC holds $6,436,158 across 3 Biotechnology names. RNA ranks #1 (54.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	RNA	Atrium Therapeutics, Inc. This page	261,288	$3,514,323
2	ARVN	Arvinas, Inc.	294,594	$2,448,076
3	OABI	OmniAb, Inc.	192,585	$473,759

2 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$3,514,323	261,288	+13.6%	Shares	Defined	2026-08-19
2026-03-31	$3,075,100	230,000	—	Shares	Defined	2026-05-12
No filing history on record for this holder in this stock.