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Superstring Capital Management’s Ultragenyx Pharmaceutical RARE Stock Holding History

Superstring Capital Management’s Portfolio RARE Stock Details RARE Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-31,738
Closed -$730K – 50
2025
Q4 		$730K Buy
+31,738
New +$1.04M 0.39% 40
2025
Q3 		– Sell
-130,422
Closed -$4.74M – 42
2025
Q2 		$4.74M Buy
+130,422
New +$4.7M 5.61% 5

Other funds holding RARE

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
RI
RTW Investments New York $10B AUM 135.35% 1-Year Est. Return
Sands Capital Management
Sands Capital Management Arlington, Virginia $25.5B AUM 26.46% 1-Year Est. Return
SI
Sofinnova Investments Menlo Park, California $2.63B AUM 117.41% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
BG
Bellevue Group Kuesnacht, Switzerland $4.2B AUM 54.85% 1-Year Est. Return

Superstring Capital Management's RARE Position: Q1 2026 in Review

Superstring Capital Management sold out of Ultragenyx Pharmaceutical (RARE) in Q1 2026, closing a stake of 31,738 shares — an estimated $730K sold.

Superstring Capital Management first reported a position in RARE in Q2 2025 and held it in 2 quarters. The position peaked at $4.74M in Q2 2025. 295 funds tracked by Wall St. Rank hold RARE as of Q1 2026.

  • Superstring Capital Management reported no remaining Ultragenyx Pharmaceutical position as of Q1 2026 after selling out during the quarter.
  • Superstring Capital Management sold 31,738 Ultragenyx Pharmaceutical shares in Q1 2026, an estimated $730K.
  • Superstring Capital Management first reported a position in Ultragenyx Pharmaceutical in Q2 2025 and held it in 2 quarters.
  • Superstring Capital Management's Ultragenyx Pharmaceutical position peaked at $4.74M in Q2 2025.
  • 295 funds tracked by Wall St. Rank held Ultragenyx Pharmaceutical as of Q1 2026.

Based on Superstring Capital Management's 13F filing for Q1 2026, filed 14 May 2026.