RCM
ATII

Rivernorth Capital Management’s Archimedes Tech SPAC Partners II Co ATII Stock Holding History

Rivernorth Capital Management’s Portfolio ATII Stock Details ATII Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$4.45M Sell
427,500
-20,250
-5% -$213K 0.22% 127
2025
Q4 		$4.64M Buy
447,750
+90,000
+25% +$933K 0.22% 135
2025
Q3 		$3.65M Buy
+357,750
New +$3.65M 0.21% 134

Other funds holding ATII

TCM
Tenor Capital Management New York $6.49B AUM 3.01% 1-Year Est. Return
MF
Magnetar Financial Evanston, Illinois $9.84B AUM 190.64% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return
LA
Linden Advisors New York $17.9B AUM 1.72% 1-Year Est. Return
AA
AQR Arbitrage Greenwich, Connecticut $6.09B AUM 27.01% 1-Year Est. Return
WCMNY
Westchester Capital Management (New York) Valhalla, New York $2.21B AUM 26.02% 1-Year Est. Return
LP
LMR Partners London, United Kingdom $45.4B AUM 60.68% 1-Year Est. Return
GCM
Ghisallo Capital Management Boston, Massachusetts $3.63B AUM 30.51% 1-Year Est. Return
GL
Governors Lane New York $1.56B AUM 30.42% 1-Year Est. Return
AIMCA
Alberta Investment Management Corp (AIMCo) Edmonton, Alberta, Canada $16.7B AUM 23.27% 1-Year Est. Return

Rivernorth Capital Management's ATII Position: Q1 2026 in Review

Rivernorth Capital Management reduced its Archimedes Tech SPAC Partners II Co (ATII) stake by 4.5% in Q1 2026, selling an estimated $213K and leaving 427,500 shares worth $4.45M. The position accounts for 0.22% of the portfolio, ranked #127.

Rivernorth Capital Management first reported a position in ATII in Q3 2025 and has held it in 3 quarters since. The position peaked at $4.64M in Q4 2025. 54 funds tracked by Wall St. Rank hold ATII as of Q1 2026.

  • Rivernorth Capital Management held 427,500 shares of Archimedes Tech SPAC Partners II Co worth $4.45M as of Q1 2026.
  • Rivernorth Capital Management sold 20,250 Archimedes Tech SPAC Partners II Co shares in Q1 2026, an estimated $213K.
  • Archimedes Tech SPAC Partners II Co made up 0.22% of Rivernorth Capital Management's portfolio in Q1 2026, its #127 holding.
  • Rivernorth Capital Management first reported a position in Archimedes Tech SPAC Partners II Co in Q3 2025 and has held it in 3 quarters since.
  • Rivernorth Capital Management's Archimedes Tech SPAC Partners II Co position peaked at $4.64M in Q4 2025.
  • 54 funds tracked by Wall St. Rank held Archimedes Tech SPAC Partners II Co as of Q1 2026.

Based on Rivernorth Capital Management's 13F filing for Q1 2026, filed 15 May 2026.