New Leaf Venture Partners’s Alector ALEC Stock Holding History

New Leaf Venture 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 Q3	$1.01M	Hold	339,569	–	–	2.33%	6
2025 Q2	$475K	Hold	339,569	–	–	0.9%	7
2025 Q1	$418K	Hold	339,569	–	–	0.93%	9
2024 Q4	$642K	Hold	339,569	–	–	0.86%	8
2024 Q3	$1.58M	Hold	339,569	–	–	1.63%	8
2024 Q2	$1.54M	Hold	339,569	–	–	1.87%	8
2024 Q1	$2.04M	Hold	339,569	–	–	1.79%	8
2023 Q4	$2.71M	Hold	339,569	–	–	2.18%	8
2023 Q3	$2.2M	Hold	339,569	–	–	2.83%	8
2023 Q2	$2.04M	Hold	339,569	–	–	1.75%	11
2023 Q1	$2.1M	Hold	339,569	–	–	1.74%	11
2022 Q4	$3.13M	Hold	339,569	–	–	2.27%	9
2022 Q3	$3.21M	Hold	339,569	–	–	1.91%	7
2022 Q2	$3.45M	Hold	339,569	–	–	2.24%	10
2022 Q1	$4.84M	Hold	339,569	–	–	2.38%	10
2021 Q4	$7.01M	Hold	339,569	–	–	2.54%	11
2021 Q3	$7.75M	Hold	339,569	–	–	2.24%	9
2021 Q2	$7.07M	Hold	339,569	–	–	1.82%	9
2021 Q1	$6.84M	Hold	339,569	–	–	1.59%	9
2020 Q4	$5.14M	Hold	339,569	–	–	1.19%	10
2020 Q3	$3.58M	Hold	339,569	–	–	1.44%	11
2020 Q2	$8.3M	Sell	339,569 -300,000	-47%	-$8.28M	2.38%	8
2020 Q1	$15.4M	Hold	639,569	–	–	4.62%	6
2019 Q4	$11M	Hold	639,569	–	–	2.39%	8
2019 Q3	$9.22M	Sell	639,569 -148,200	-19%	-$2.68M	2.79%	7
2019 Q2	$15M	Hold	787,769	–	–	4.01%	6
2019 Q1	$14.7M	Buy	+787,769	New	+$14.9M	4.04%	6

Other funds holding ALEC

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

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

RTW Investments New York $10B AUM 135.35% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 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

T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return

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

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Eversept Partners New York $1.9B AUM 121.13% 1-Year Est. Return

New Leaf Venture Partners's ALEC Position: Q3 2025 in Review

New Leaf Venture Partners held its Alector (ALEC) position steady in Q3 2025 at 339,569 shares worth $1.01M. The position accounts for 2.33% of the portfolio, ranked #6.

New Leaf Venture Partners first reported a position in ALEC in Q1 2019 and has held it in 27 quarters since. The position peaked at $15.4M in Q1 2020. 149 funds tracked by Wall St. Rank hold ALEC as of Q3 2025.

New Leaf Venture Partners held 339,569 shares of Alector worth $1.01M as of Q3 2025.
New Leaf Venture Partners left its Alector share count unchanged in Q3 2025.
Alector made up 2.33% of New Leaf Venture Partners's portfolio in Q3 2025, its #6 holding.
New Leaf Venture Partners first reported a position in Alector in Q1 2019 and has held it in 27 quarters since.
New Leaf Venture Partners's Alector position peaked at $15.4M in Q1 2020.
149 funds tracked by Wall St. Rank held Alector as of Q3 2025.

Based on New Leaf Venture Partners's 13F filing for Q3 2025, filed 14 Nov 2025.