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Samsara BioCapital’s X4 Pharmaceuticals XFOR Stock Holding History

Samsara BioCapital’s Portfolio XFOR Stock Details XFOR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$6.52M Sell
1,395,587
-436,979
-24% -$1.79M 0.54% 20
2026
Q1 		$7.57M Sell
1,832,566
-127,434
-7% -$477K 0.74% 13
2025
Q4 		$7.84M Buy
+1,960,000
New +$7.12M 0.81% 16

Other funds holding XFOR

Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BCLSI
Bain Capital Life Sciences Investors Boston, Massachusetts $1.68B AUM 126.09% 1-Year Est. Return
PA
Perceptive Advisors New York $6.66B AUM 360.84% 1-Year Est. Return
SVCM
Saturn V Capital Management Austin, Texas $697M AUM 628.57% 1-Year Est. Return
EAM
Empery Asset Management New York $86.5M AUM
DTC
Deep Track Capital Greenwich, Connecticut $6.87B AUM 205.24% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
KCM
Kalehua Capital Management Dallas, Texas $174M AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Samsara BioCapital's XFOR Position: Q2 2026 in Review

Samsara BioCapital reduced its X4 Pharmaceuticals (XFOR) stake by 24% in Q2 2026, selling an estimated $1.79M and leaving 1,395,587 shares worth $6.52M. The position accounts for 0.54% of the portfolio, ranked #20.

Samsara BioCapital first reported a position in XFOR in Q4 2025 and has held it in 3 quarters since. The position peaked at $7.84M in Q4 2025. 89 funds tracked by Wall St. Rank hold XFOR as of Q2 2026.

  • Samsara BioCapital held 1,395,587 shares of X4 Pharmaceuticals worth $6.52M as of Q2 2026.
  • Samsara BioCapital sold 436,979 X4 Pharmaceuticals shares in Q2 2026, an estimated $1.79M.
  • X4 Pharmaceuticals made up 0.54% of Samsara BioCapital's portfolio in Q2 2026, its #20 holding.
  • Samsara BioCapital first reported a position in X4 Pharmaceuticals in Q4 2025 and has held it in 3 quarters since.
  • Samsara BioCapital's X4 Pharmaceuticals position peaked at $7.84M in Q4 2025.
  • 89 funds tracked by Wall St. Rank held X4 Pharmaceuticals as of Q2 2026.

Based on Samsara BioCapital's 13F filing for Q2 2026, filed 14 Aug 2026.