Alector Ownership | Who Owns Alector?

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Alector Ownership Summary

Alector is owned by 70.00% institutional investors, 10.48% insiders, and 19.52% retail investors. Fmr is the largest institutional shareholder, holding 15.20% of ALEC shares. Fidelity Growth Compy Commingled Pl S is the top mutual fund, with 5.37% of its assets in Alector shares.

ALEC Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Alector	70.00%	10.48%	19.52%
Sector	Healthcare Stocks	486.50%	11.08%	-397.59%
Industry	Biotech Stocks	304.14%	11.08%	-215.23%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Fmr	14.69M	15.20%	$27.76M
Blackrock	9.10M	9.70%	$41.32M
Blackrock funding, inc. /de	7.97M	7.94%	$11.16M
Vanguard group	5.62M	5.81%	$10.61M
Merck	3.55M	3.53%	$4.96M
Morgan stanley	3.01M	3.20%	$13.64M
Acadian asset management	2.17M	2.16%	$3.03M
Geode capital management	1.91M	1.98%	$3.62M
Eversept partners, lp	1.99M	1.98%	$2.78M
State street	1.85M	1.91%	$3.50M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Merck	3.55M	2.30%	$4.96M
New leaf venture partners	339.57K	0.90%	$475.40K
Euclidean capital	1.31M	0.60%	$1.83M
Sio capital management	845.53K	0.45%	$1.18M
5am venture management	995.84K	0.45%	$1.88M
Medici capital	167.19K	0.39%	$315.99K
Adar1 capital management	1.72M	0.37%	$2.41M
Dafna capital management	912.93K	0.35%	$1.28M
Eversept partners, lp	1.99M	0.26%	$2.78M
Ikarian capital	900.00K	0.24%	$1.26M

Top Buyers

Holder	Shares	% Assets	Change
Eversept partners, lp	1.99M	0.26%	1.37M
Adar1 capital management	1.72M	0.37%	1.34M
5am venture management	995.84K	0.45%	995.84K
Acadian asset management	2.17M	0.01%	729.73K
Blackrock	9.10M	0.00%	617.87K

Top Sellers

Holder	Shares	% Assets	Change
Ra capital management	-	-	-9.70M
Deep track capital, lp	-	-	-4.63M
Ecor1 capital	-	-	-4.06M
Braidwell lp	-	-	-2.16M
Soleus capital management	-	-	-1.21M

New Positions

Holder	Shares	% Assets	Change	Value
5am venture management	995.84K	0.45%	995.84K	$1.88M
Mackenzie financial	274.44K	0.00%	274.44K	$384.22K
Apollon wealth management	25.00K	0.00%	25.00K	$47.25K
Vanguard personalized indexing management	13.11K	0.00%	13.11K	$24.77K
Dlk investment management	10.50K	0.01%	10.50K	$19.84K

Sold Out

Holder	Change
Sandy spring bank	-1.00
Ifp advisors	-4.00
Nelson, van denburg & campbell wealth management group	-13.00
Parallel advisors	-15.00
Farther finance advisors	-40.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2025	134	-5.63%	70,260,765	-3.24%	70	1.31%	60	-7.69%	38	11.76%
Mar 31, 2025	13	-91.45%	16,026,504	-78.15%	16	0.28%	7	-90.67%	1	-97.37%
Dec 31, 2024	149	-9.15%	73,332,095	1.08%	75	1.35%	73	7.35%	38	-20.83%
Sep 30, 2024	163	0.62%	72,549,854	-0.17%	75	1.33%	68	-16.05%	48	-5.88%
Jun 30, 2024	161	1.90%	72,671,102	-1.85%	77	1.01%	81	-6.90%	50	38.89%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Fidelity Growth Compy Commingled Pl S	5.37M	5.37%	75.04K
Fidelity Growth Compy Commingled Pl O	5.02M	5.16%	13.10K
T. Rowe Price Health Sciences	3.79M	3.79%	-142.80K
Fidelity Growth Company Fund	3.73M	3.73%	51.30K
Fidelity Select Biotechnology	3.59M	3.59%	576.30K
Vanguard Total Stock Mkt Idx Inv	2.42M	2.39%	-53.33K
Vanguard US Total Market Shares ETF	2.37M	2.39%	-
iShares Russell 2000 ETF	1.86M	1.84%	-35.38K
Fidelity Growth Company K6	1.26M	1.26%	9.76K
Fidelity Series Growth Company	999.46K	1.00%	-200.00

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jun 20, 2025	Yaffe Kristine	-	Sell	$1.44K
Jun 02, 2025	GRASSO MARC	Chief Financial Officer	Sell	$22.07K
Jun 02, 2025	Kenkare-Mitra Sara	President and Head of R&D	Sell	$31.97K
Jun 02, 2025	Rosenthal Arnon	Chief Executive Officer	Sell	$69.71K
Mar 03, 2025	Kenkare-Mitra Sara	President and Head of R&D	Sell	$42.66K

Insider Transactions Trends

Date	Buy	Sell
2025 Q3	-	-
2025 Q2	-	4
2025 Q1	-	4
2024 Q4	-	4
2024 Q3	-	7

ALEC Ownership FAQ

Who Owns Alector?

Alector shareholders are primarily institutional investors at 70.00%, followed by 10.48% insiders and 19.52% retail investors. The average institutional ownership in Alector's industry, Biotech Stocks , is 304.14%, which Alector falls below.

Who owns the most shares of Alector?

Alector’s largest shareholders are Fmr (14.69M shares, 15.20%), Blackrock (9.1M shares, 9.70%), and Blackrock funding, inc. /de (7.97M shares, 7.94%). Together, they hold 32.84% of Alector’s total shares outstanding.

Does Blackrock own Alector?

Yes, BlackRock owns 9.70% of Alector, totaling 9.1M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 41.32M$. In the last quarter, BlackRock increased its holdings by 617.87K shares, a 7.28% change.

Who is Alector’s biggest shareholder by percentage of total assets invested?

Merck is Alector’s biggest shareholder by percentage of total assets invested, with 2.30% of its assets in 3.55M Alector shares, valued at 4.96M$.

Who is the top mutual fund holder of Alector shares?

Fidelity Growth Compy Commingled Pl S is the top mutual fund holder of Alector shares, with 5.37% of its total shares outstanding invested in 5.37M Alector shares.

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