Alector Ownership | Who Owns Alector?

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Alector Ownership Summary

Alector is owned by 7.19% institutional investors, 10.12% insiders, and 82.69% retail investors. Tcg crossover management is the largest institutional shareholder, holding 9.71% of ALEC shares. Fidelity Growth Compy Commingled Pl S is the top mutual fund, with 5.32% of its assets in Alector shares.

ALEC Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Alector	7.19%	10.12%	82.69%
Sector	Healthcare Stocks	232.80%	10.63%	-143.43%
Industry	Biotech Stocks	379.48%	10.37%	-289.85%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Tcg crossover management	10.00M	9.71%	$21.50M
Blackrock	9.10M	9.70%	$41.32M
Blackrock funding, inc. /de	7.74M	7.52%	$16.64M
Rtw investments, lp	6.99M	6.96%	$20.69M
Vanguard group	6.91M	6.73%	$10.78M
Acadian asset management	4.04M	3.92%	$8.68M
Foresite capital management iv	3.89M	3.77%	$8.36M
Merck	3.55M	3.44%	$7.62M
D. e. shaw	3.33M	3.24%	$7.17M
683 capital management	3.20M	3.11%	$6.88M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Medici capital	1.65M	4.37%	$3.55M
Foresite capital management iv	3.89M	3.53%	$8.36M
New leaf venture partners	339.57K	2.33%	$1.01M
Merck	3.55M	2.18%	$7.62M
5am venture management	995.84K	1.08%	$2.95M
Euclidean capital	1.31M	0.72%	$2.81M
Tcg crossover management	10.00M	0.62%	$21.50M
Dafna capital management	908.35K	0.44%	$1.95M
Nano cap new millennium growth fund l p	200.00K	0.40%	$430.00K
Ikarian capital	2.08M	0.36%	$4.48M

Top Buyers

Holder	Shares	% Assets	Change
Rtw investments, lp	6.99M	0.26%	6.99M
Nantahala capital management	2.82M	0.22%	2.82M
D. e. shaw	3.33M	0.00%	967.68K
Vanguard group	6.91M	0.00%	873.39K
Millennium management	1.98M	0.00%	646.31K

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
Adar1 capital management	-	-	-1.72M

New Positions

Holder	Shares	% Assets	Change	Value
Rtw investments, lp	6.99M	0.26%	6.99M	$20.69M
Nantahala capital management	2.82M	0.22%	2.82M	$6.05M
Vanguard fiduciary trust	577.94K	0.00%	577.94K	$1.24M
Affinity asset advisors	500.00K	0.06%	500.00K	$1.07M
Artia global partners lp	71.03K	0.03%	71.03K	$210.25K

Sold Out

Holder	Change
Sandy spring bank	-1.00
Truvestments capital	-2.00
Nelson, van denburg & campbell wealth management group	-13.00
Parallel advisors	-15.00
Northwestern mutual wealth management	-50.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	19	-87.82%	7,374,102	-90.14%	7	0.13%	7	-90.41%	7	-82.50%
Sep 30, 2025	48	-64.71%	8,400,791	-88.08%	8	0.17%	17	-73.02%	13	-64.86%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Fidelity Growth Compy Commingled Pl S	5.38M	5.32%	7.10K
Fidelity Growth Compy Commingled Pl O	5.02M	5.16%	13.10K
Fidelity Growth Company Fund	3.70M	3.66%	-22.17K
T. Rowe Price Health Sciences	3.13M	3.09%	-661.48K
Vanguard US Total Market Shares ETF	2.37M	2.39%	-
Vanguard Total Stock Mkt Idx Inv	2.54M	2.30%	-
iShares Russell 2000 ETF	2.09M	1.88%	17.58K
Fidelity Select Biotechnology	1.78M	1.60%	-442.40K
Fidelity Growth Company K6	1.27M	1.26%	15.32K
Fidelity Series Growth Company	999.46K	0.99%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
Apr 16, 2026	Wong-Sarad Grace	Principal Accounting Officer	Sell	$4.82K
Mar 10, 2026	Wong-Sarad Grace	Principal Accounting Officer	Sell	$2.65K
Mar 03, 2026	Wong-Sarad Grace	Principal Accounting Officer	Sell	$7.01K
Mar 02, 2026	Wong-Sarad Grace	Principal Accounting Officer	Sell	$17.14K
Mar 02, 2026	Rosenthal Arnon	Chief Executive Officer	Sell	$173.82K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	-	1
2026 Q1	-	6
2025 Q4	-	5
2025 Q3	-	5
2025 Q2	-	4

ALEC Ownership FAQ

Who Owns Alector?

Alector shareholders are primarily institutional investors at 7.19%, followed by 10.12% insiders and 82.69% retail investors. The average institutional ownership in Alector's industry, Biotech Stocks , is 379.48%, which Alector falls below.

Who owns the most shares of Alector?

Alector’s largest shareholders are Tcg crossover management (10M shares, 9.71%), Blackrock (9.1M shares, 9.70%), and Blackrock funding, inc. /de (7.74M shares, 7.52%). Together, they hold 26.93% 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?

Medici capital is Alector’s biggest shareholder by percentage of total assets invested, with 4.37% of its assets in 1.65M Alector shares, valued at 3.55M$.

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 5.32% of its total shares outstanding invested in 5.38M Alector shares.

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