BlackRock
ATTO

BlackRock’s Attovia Therapeutics ATTO Stock Holding History

BlackRock’s Portfolio ATTO Stock Details ATTO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q3 		$4.55M Buy
+265,397
New +$5.59M ﹤0.01% 3971

Other funds holding ATTO

Sanofi
Sanofi Paris, France $630M AUM 104.49% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $114B AUM 35.47% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.76T AUM
Federated Hermes
Federated Hermes Pittsburgh, Pennsylvania $71.4B AUM 33.43% 1-Year Est. Return
Nantahala Capital Management
Nantahala Capital Management New Canaan, Connecticut $3.16B AUM 31.44% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.32T AUM 44.66% 1-Year Est. Return
Vivo Capital
Vivo Capital Palo Alto, California $909M AUM 385.65% 1-Year Est. Return
Spruce Street Capital
Spruce Street Capital New York $629M AUM 210.46% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return
KCM
Kalehua Capital Management Dallas, Texas $132M AUM 92.09% 1-Year Est. Return

BlackRock's ATTO Position: Q3 2026 in Review

BlackRock opened a new position in Attovia Therapeutics (ATTO) in Q3 2026: 265,397 shares worth $4.55M. The stake represents ﹤0.01% of the portfolio and ranks #3971 among its holdings.

27 funds tracked by Wall St. Rank hold ATTO as of Q3 2026.

  • BlackRock held 265,397 shares of Attovia Therapeutics worth $4.55M as of Q3 2026.
  • Attovia Therapeutics was a new BlackRock position in Q3 2026.
  • Attovia Therapeutics made up ﹤0.01% of BlackRock's portfolio in Q3 2026, its #3971 holding.
  • 27 funds tracked by Wall St. Rank held Attovia Therapeutics as of Q3 2026.

Based on BlackRock's 13F filing for Q3 2026, filed 13 Nov 2026.