Alector, Inc.

ALECNASDAQ

$1.81-0.18 (-9.05% today)

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

Alector, Inc. price and activity chart data

Showing the 1Y range: Oct 6, 2025 to Oct 6, 2026. Price (-43.1%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
TCG Crossover Management, LLC	8.96%	$20.1M	0.48%	Not reported
Nantahala Capital Management, LLC	7.73%	$17.4M	0.29%	Add 206.69%
BlackRock, Inc.	7.03%	$15.8M	0.00%	Not reported
Acadian Asset Management LLC	3.95%	$8.86M	0.01%	Not reported
Vanguard Capital Management LLC	3.59%	$8.06M	0.00%	Not reported
Kynam Capital Management, LP	3.41%	$7.66M	0.42%	Add 90.42%
Merck & Co., Inc.	3.18%	$7.13M	1.35%	Not reported
Balyasny Asset Management L.P.	2.91%	$6.53M	0.01%	Not reported
683 Capital Management, LLC	2.87%	$6.43M	0.32%	Not reported
D. E. Shaw & Co., Inc.	2.65%	$5.95M	0.00%	Not reported
ADAR1 Capital Management, LLC	2.58%	$5.8M	0.27%	Add 174.63%
Vanguard Portfolio Management LLC	2.53%	$5.67M	0.00%	Not reported
Geode Capital Management, LLC	2.20%	$4.93M	0.00%	Not reported
Spruce Street Capital LP	1.88%	$4.22M	0.83%	Not reported
Millennium Management LLC	1.78%	$4M	0.00%	Not reported
Ikarian Capital, LLC	1.78%	$3.99M	0.43%	Reduce 4.80%
State Street Corp	1.68%	$3.78M	0.00%	Not reported
Jacobs Levy Equity Management, Inc	1.58%	$3.55M	0.01%	Not reported
Medici Capital LLC	1.48%	$3.32M	6.51%	Not reported
Affinity Asset Advisors, LLC	1.35%	$3.04M	0.14%	Add 202.00%
Eversept Partners, LP	1.28%	$2.86M	0.15%	Add 5.39%
FMR LLC	1.25%	$2.81M	0.00%	Not reported
AQR Capital Management LLC	1.17%	$2.63M	0.00%	Not reported
Euclidean Capital LLC	1.17%	$2.63M	0.60%	Not reported
Mackenzie Financial Corp	0.99%	$2.23M	0.00%	Not reported
Deutsche Bank Ag\	0.98%	$2.21M	0.00%	Not reported
Deerfield Management Company, L.P.	0.95%	$2.12M	0.02%	Not reported
Two Sigma Investments, LP	0.94%	$2.1M	0.00%	Not reported
Renaissance Technologies LLC	0.84%	$1.88M	0.00%	Not reported
DAFNA Capital Management LLC	0.81%	$1.83M	0.35%	Not reported
Elmind Capital, LP	0.81%	$1.81M	0.45%	Not reported
Panagora Asset Management Inc	0.76%	$1.7M	0.01%	Not reported
Charles Schwab Investment Management Inc	0.73%	$1.65M	0.00%	Not reported
Northern Trust Corp	0.69%	$1.55M	0.00%	Not reported
Vanguard Fiduciary Trust Co	0.59%	$1.33M	0.00%	Not reported
Marshall Wace, LLP	0.54%	$1.2M	0.00%	Not reported
Cantor Fitzgerald, L. P.	0.53%	$1.19M	0.01%	Not reported
Boothbay Fund Management, LLC	0.48%	$1.07M	0.01%	Not reported
Goldman Sachs Group Inc	0.39%	$872K	0.00%	Not reported
XTX Topco Ltd	0.36%	$803K	0.01%	Not reported
Citadel Advisors LLC	0.35%	$786K	0.00%	Not reported
UBS Group AG	0.25%	$550K	0.00%	Not reported
Invesco Ltd.	0.23%	$517K	0.00%	Not reported
Bank of New York Mellon Corp	0.22%	$503K	0.00%	Not reported
Ameriprise Financial Inc	0.20%	$451K	0.00%	Not reported
Nano Cap New Millennium Growth Fund L P	0.18%	$402K	0.31%	Not reported
Nuveen, LLC	0.16%	$354K	0.00%	Not reported
Utah Retirement Systems	0.14%	$310K	0.00%	Not reported
Bank of America Corp	0.13%	$287K	0.00%	Not reported
Bridgeway Capital Management, LLC	0.13%	$286K	0.01%	Not reported

50 of 131 holders

Activity score

Premium

100

WEAK

STRONG

Unlock

AI Activity Analysis

Premium

Coming soonAI reads of insider, institutional and company activity will appear here for Premium accounts.

Historical Activity Patterns

Premium

Historical Activity PatternsHistorical periods where multiple activity categories converged, with subsequent market performance shown for context.Unlock