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Diadema Partners’s Gossamer Bio GOSS Stock Holding History

Diadema Partners’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
-10,964
Closed -$2.72M – 166
2025
Q4 		$2.72M Buy
10,964
+654
+6% +$149K 0.47% 48
2025
Q3 		$2.17M Hold
10,310
– – 0.55% 59
2025
Q2 		$1.01M Hold
10,310
– – 0.31% 65
2025
Q1 		$907K Buy
10,310
+7,099
+221% +$657K 0.24% 67
2024
Q4 		$232K Buy
+3,211
New +$220K 0.1% 87

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

Diadema Partners's GOSS Position: Q2 2025 in Review

Diadema Partners sold out of Gossamer Bio (GOSS) in Q2 2025, closing a stake of 3,370 shares — an estimated $294K sold.

Diadema Partners first reported a position in GOSS in Q4 2024 and held it in 2 quarters. The position peaked at $297K in Q1 2025. 121 funds tracked by Wall St. Rank hold GOSS as of Q2 2025.

  • Diadema Partners reported no remaining Gossamer Bio position as of Q2 2025 after selling out during the quarter.
  • Diadema Partners sold 3,370 Gossamer Bio shares in Q2 2025, an estimated $294K.
  • Diadema Partners first reported a position in Gossamer Bio in Q4 2024 and held it in 2 quarters.
  • Diadema Partners's Gossamer Bio position peaked at $297K in Q1 2025.
  • 121 funds tracked by Wall St. Rank held Gossamer Bio as of Q2 2025.

Based on Diadema Partners's 13F filing for Q2 2025, filed 14 Aug 2025.