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Platinum Investment Management’s Gossamer Bio GOSS Stock Holding History

Platinum Investment Management’s Portfolio GOSS Stock Details GOSS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-561,951
Closed -$1.74M – 105
2025
Q4 		$1.74M Sell
561,951
-202,214
-26% -$577K 0.4% 69
2025
Q3 		$2.01M Sell
764,165
-619,698
-45% -$1.37M 0.13% 67
2025
Q2 		$1.7M Sell
1,383,863
-347,492
-20% -$379K 0.11% 60
2025
Q1 		$1.9M Sell
1,731,355
-1,448,940
-46% -$1.67M 0.11% 54
2024
Q4 		$2.88M Sell
3,180,295
-344,613
-10% -$295K 0.17% 53
2024
Q3 		$3.48M Hold
3,524,908
– – 0.16% 52
2024
Q2 		$3.18M Sell
3,524,908
-1,169,157
-25% -$875K 0.13% 49
2024
Q1 		$5.54M Sell
4,694,065
-2,260,045
-32% -$2.49M 0.22% 38
2023
Q4 		$6.35M Buy
6,954,110
+1,596,332
+30% +$1.18M 0.26% 52
2023
Q3 		$4.46M Buy
5,357,778
+2,994,608
+127% +$3.45M 0.17% 53
2023
Q2 		$2.84M Hold
2,363,170
– – 0.1% 72
2023
Q1 		$2.98M Buy
+2,363,170
New +$4.52M 0.1% 71

Other funds holding GOSS

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
KCM
Kalehua Capital Management Dallas, Texas $174M AUM
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
AVM
Arch Venture Management Chicago, Illinois $1.1B AUM 356.62% 1-Year Est. Return
OCA
Octagon Capital Advisors New York $1.11B AUM 866.76% 1-Year Est. Return
SB
Samsara BioCapital Palo Alto, California $1.22B AUM 242.83% 1-Year Est. Return
Balyasny Asset Management
Balyasny Asset Management Chicago, Illinois $80.2B AUM 51.53% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return
SL
Siren LLC Greenwich, Connecticut $4.94B AUM 244.43% 1-Year Est. Return

Platinum Investment Management's GOSS Position: Q1 2026 in Review

Platinum Investment Management sold out of Gossamer Bio (GOSS) in Q1 2026, closing a stake of 561,951 shares — an estimated $1.74M sold.

Platinum Investment Management first reported a position in GOSS in Q1 2023 and held it in 12 quarters. The position peaked at $6.35M in Q4 2023. 185 funds tracked by Wall St. Rank hold GOSS as of Q1 2026.

  • Platinum Investment Management reported no remaining Gossamer Bio position as of Q1 2026 after selling out during the quarter.
  • Platinum Investment Management sold 561,951 Gossamer Bio shares in Q1 2026, an estimated $1.74M.
  • Platinum Investment Management first reported a position in Gossamer Bio in Q1 2023 and held it in 12 quarters.
  • Platinum Investment Management's Gossamer Bio position peaked at $6.35M in Q4 2023.
  • 185 funds tracked by Wall St. Rank held Gossamer Bio as of Q1 2026.

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