APCM
RNA

Arbiter Partners Capital Management’s Atrium Therapeutics RNA Stock Holding History

Arbiter Partners Capital Management’s Portfolio RNA Stock Details RNA Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$3.51M Buy
261,288
+31,288
+14% +$409K 1.85% 14
2026
Q1 		$3.08M Buy
+230,000
New +$3.23M 1.76% 17

Other funds holding RNA

SC
Sessa Capital New York $5.98B AUM 99.85% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
CL
CRCM LP San Francisco, California $152M AUM 26.3% 1-Year Est. Return
TAL
TIG Advisors LLC New York $2.26B AUM 81.38% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
6CM
683 Capital Management New York $2.04B AUM 94.26% 1-Year Est. Return

Arbiter Partners Capital Management's RNA Position: Q2 2026 in Review

Arbiter Partners Capital Management increased its Atrium Therapeutics (RNA) stake by 14% in Q2 2026, buying an estimated $409K and bringing the position to 261,288 shares worth $3.51M. The position accounts for 1.85% of the portfolio, ranked #14.

Arbiter Partners Capital Management first reported a position in RNA in Q1 2026 and has held it in 2 quarters since. 155 funds tracked by Wall St. Rank hold RNA as of Q2 2026.

  • Arbiter Partners Capital Management held 261,288 shares of Atrium Therapeutics worth $3.51M as of Q2 2026.
  • Arbiter Partners Capital Management bought 31,288 Atrium Therapeutics shares in Q2 2026, an estimated $409K.
  • Atrium Therapeutics made up 1.85% of Arbiter Partners Capital Management's portfolio in Q2 2026, its #14 holding.
  • Arbiter Partners Capital Management first reported a position in Atrium Therapeutics in Q1 2026 and has held it in 2 quarters since.
  • 155 funds tracked by Wall St. Rank held Atrium Therapeutics as of Q2 2026.

Based on Arbiter Partners Capital Management's 13F filing for Q2 2026, filed 10 Aug 2026.