Siren LLC’s Generate Biomedicines GENB Stock Holding History

Siren LLC’s Portfolio GENB Stock Details GENB Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$12.4M	Hold	736,104	–	–	0.25%	64
2026 Q1	$9.2M	Buy	+736,104	New	+$8.99M	0.26%	60

Other funds holding GENB

Flagship Pioneering Cambridge, Massachusetts $1.54B AUM 86.39% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return

Braidwell Stamford, Connecticut $2.7B AUM 88.53% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

Norges Bank Oslo, Norway $1T AUM

Arch Venture Management Chicago, Illinois $1.1B AUM 356.62% 1-Year Est. Return

Harbourvest Partners Boston, Massachusetts $170M AUM 34.45% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

BBA

Baker Bros. Advisors New York $20B AUM 154.41% 1-Year Est. Return

Siren LLC's GENB Position: Q2 2026 in Review

Siren LLC held its Generate Biomedicines (GENB) position steady in Q2 2026 at 736,104 shares worth $12.4M. The position accounts for 0.25% of the portfolio, ranked #64.

Siren LLC first reported a position in GENB in Q1 2026 and has held it in 2 quarters since. 86 funds tracked by Wall St. Rank hold GENB as of Q2 2026.

Siren LLC held 736,104 shares of Generate Biomedicines worth $12.4M as of Q2 2026.
Siren LLC left its Generate Biomedicines share count unchanged in Q2 2026.
Generate Biomedicines made up 0.25% of Siren LLC's portfolio in Q2 2026, its #64 holding.
Siren LLC first reported a position in Generate Biomedicines in Q1 2026 and has held it in 2 quarters since.
86 funds tracked by Wall St. Rank held Generate Biomedicines as of Q2 2026.

Based on Siren LLC's 13F filing for Q2 2026, filed 13 Aug 2026.