Alector Ownership | Who Owns Alector?

Overview Forecast RevenueFinancials Chart Transcripts

Alector Ownership Summary

Alector is owned by 7.19% institutional investors, 10.12% insiders, and 82.69% retail investors. Fmr is the largest institutional shareholder, holding 15.13% 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	232.63%	10.66%	-143.29%
Industry	Biotech Stocks	382.12%	10.42%	-292.54%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Fmr	15.18M	15.13%	$44.94M
Blackrock	9.10M	9.70%	$41.32M
Blackrock funding, inc. /de	7.15M	6.97%	$11.15M
Rtw investments, lp	6.99M	6.96%	$20.69M
Vanguard group	6.91M	6.73%	$10.78M
Merck	3.55M	3.53%	$10.50M
Acadian asset management	3.44M	3.36%	$5.36M
Price t rowe associates inc /md/	2.19M	2.18%	$6.47M
Geode capital management	2.08M	2.02%	$3.24M
State street	1.73M	1.73%	$5.13M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Merck	3.55M	4.60%	$10.50M
New leaf venture partners	339.57K	2.33%	$1.01M
Euclidean capital	1.31M	1.63%	$3.87M
5am venture management	995.84K	1.08%	$2.95M
Medici capital	481.97K	1.03%	$1.43M
Dafna capital management	798.35K	0.58%	$2.36M
Eversept partners, lp	1.49M	0.30%	$4.41M
Nano cap new millennium growth fund l p	200.00K	0.27%	$312.00M
Rtw investments, lp	6.99M	0.26%	$20.69M
Ikarian capital	760.00K	0.23%	$2.25M

Top Buyers

Holder	Shares	% Assets	Change
Rtw investments, lp	6.99M	0.26%	6.99M
Acadian asset management	3.44M	0.01%	1.07M
683 capital management	1.00M	0.15%	1.00M
Vanguard group	6.91M	0.00%	873.39K
Jane street group	993.91K	0.00%	643.68K

Top Sellers

Holder	Shares	% Assets	Change
Ra capital management	-	-	-9.70M
Deep track capital, lp	-	-	-4.63M
Ecor1 capital	-	-	-4.06M
Price t rowe associates inc /md/	2.19M	0.00%	-2.69M
Braidwell lp	-	-	-2.16M

New Positions

Holder	Shares	% Assets	Change	Value
Rtw investments, lp	6.99M	0.26%	6.99M	$20.69M
683 capital management	1.00M	0.15%	1.00M	$2.96M
Nano cap new millennium growth fund l p	200.00K	0.27%	200.00K	$312.00M
Artia global partners lp	71.03K	0.03%	71.03K	$210.25K
Sg americas securities	27.00K	0.00%	27.00K	$42.00K

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
Farther finance advisors	-40.00

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%	-
Fidelity Select Biotechnology	2.22M	2.01%	-
iShares Russell 2000 ETF	1.89M	1.72%	570.92K
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
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
Mar 02, 2026	Berkley Neil Lindsay	CFO & Chief Business Officer	Sell	$62.95K

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	6
2025 Q4	-	5
2025 Q3	-	5
2025 Q2	-	4
2025 Q1	-	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 382.12%, which Alector falls below.

Who owns the most shares of Alector?

Alector’s largest shareholders are Fmr (15.18M shares, 15.13%), Blackrock (9.1M shares, 9.70%), and Blackrock funding, inc. /de (7.15M shares, 6.97%). Together, they hold 31.79% 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 4.60% of its assets in 3.55M Alector shares, valued at 10.5M$.

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.

Try Tickergate Pro Free

Customize Everything. 100% Flexibility. Fast and Easy to Use (No code or Excel Needed)

Customize your own personal stocks lists, views and charts
Choose from hundreds of fields, up to 15 years of history
Conduct deep comparison analysis

Discover trending investment themes
Find your next best investment
Research stocks using tools