Siren LLC’s Agenus AGEN Stock Holding History

Siren LLC’s Portfolio AGEN Stock Details AGEN Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$3.55M	Hold	1,064,250	–	–	0.1%	84
2025 Q4	$3.34M	Hold	1,064,250	–	–	0.1%	91
2025 Q3	$4.1M	Hold	1,064,250	–	–	0.16%	70
2025 Q2	$4.86M	Buy	1,064,250 +564,250	+113%	+$1.95M	0.25%	66
2025 Q1	$753K	Buy	+500,000	New	+$1.44M	0.04%	105
2024 Q4	–	Sell	-775,000	Closed	-$4.25M	–	120
2024 Q3	$4.25M	Buy	+775,000	New	+$5.8M	0.21%	72

Other funds holding AGEN

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return

Man Group London, United Kingdom $55.1B AUM 24.23% 1-Year Est. Return

Raymond James Financial St Petersburg, Florida $324B AUM 22.36% 1-Year Est. Return

UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

Siren LLC's AGEN Position: Q1 2026 in Review

Siren LLC held its Agenus (AGEN) position steady in Q1 2026 at 1,064,250 shares worth $3.55M. The position accounts for 0.1% of the portfolio, ranked #84.

Siren LLC first reported a position in AGEN in Q3 2024 and has held it in 6 quarters since. The position peaked at $4.86M in Q2 2025. 88 funds tracked by Wall St. Rank hold AGEN as of Q1 2026.

Siren LLC held 1,064,250 shares of Agenus worth $3.55M as of Q1 2026.
Siren LLC left its Agenus share count unchanged in Q1 2026.
Agenus made up 0.1% of Siren LLC's portfolio in Q1 2026, its #84 holding.
Siren LLC first reported a position in Agenus in Q3 2024 and has held it in 6 quarters since.
Siren LLC's Agenus position peaked at $4.86M in Q2 2025.
88 funds tracked by Wall St. Rank held Agenus as of Q1 2026.

Based on Siren LLC's 13F filing for Q1 2026, filed 14 May 2026.