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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
-877,100
Closed -$2.72M – 166
2025
Q4 		$2.72M Buy
877,100
+52,300
+6% +$149K 0.47% 48
2025
Q3 		$2.17M Hold
824,800
– – 0.55% 59
2025
Q2 		$1.01M Hold
824,800
– – 0.31% 65
2025
Q1 		$907K Buy
824,800
+567,900
+221% +$656K 0.24% 67
2024
Q4 		$232K Buy
+256,900
New +$220K 0.1% 87

Other funds holding GOSS

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
KCM
Kalehua Capital Management Dallas, Texas $141M AUM
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
AVM
Arch Venture Management Chicago, Illinois $677M AUM 322.07% 1-Year Est. Return
OCA
Octagon Capital Advisors New York $904M AUM 737.04% 1-Year Est. Return
SB
Samsara BioCapital Palo Alto, California $1.03B AUM 214.94% 1-Year Est. Return
Balyasny Asset Management
Balyasny Asset Management Chicago, Illinois $77.1B AUM 42.89% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
SL
Siren LLC Greenwich, Connecticut $3.61B AUM 203.3% 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 269,589 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. 123 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 269,589 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.
  • 123 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.