Diadema Partners’s Alector ALEC Stock Holding History

Diadema Partners’s Portfolio ALEC Stock Details ALEC Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-136,023	Closed	-$403K	–	148
2025 Q3	$403K	Sell	136,023 -130,000	-49%	-$286K	0.1%	102
2025 Q2	$372K	Sell	266,023 -190,523	-42%	-$239K	0.11%	83
2025 Q1	$562K	Buy	456,546 +217,527	+91%	+$354K	0.15%	76
2024 Q4	$452K	Buy	+239,019	New	+$900K	0.19%	72

Other funds holding ALEC

TCM

TCG Crossover Management Palo Alto, California $3.5B AUM 1,165.83% 1-Year Est. Return

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

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

FCMI

Foresite Capital Management IV Larkspur, California $237M AUM 107.53% 1-Year Est. Return

Merck & Co Kenilworth, New Jersey $349M AUM 146.07% 1-Year Est. Return

Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return

6CM

683 Capital Management New York $1.92B AUM 85.52% 1-Year Est. Return

Balyasny Asset Management Chicago, Illinois $77.1B AUM 42.89% 1-Year Est. Return

D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Diadema Partners's ALEC Position: Q4 2025 in Review

Diadema Partners sold out of Alector (ALEC) in Q4 2025, closing a stake of 136,023 shares — an estimated $403K sold.

Diadema Partners first reported a position in ALEC in Q4 2024 and held it in 4 quarters. The position peaked at $562K in Q1 2025. 131 funds tracked by Wall St. Rank hold ALEC as of Q4 2025.

Diadema Partners reported no remaining Alector position as of Q4 2025 after selling out during the quarter.
Diadema Partners sold 136,023 Alector shares in Q4 2025, an estimated $403K.
Diadema Partners first reported a position in Alector in Q4 2024 and held it in 4 quarters.
Diadema Partners's Alector position peaked at $562K in Q1 2025.
131 funds tracked by Wall St. Rank held Alector as of Q4 2025.

Based on Diadema Partners's 13F filing for Q4 2025, filed 17 Feb 2026.