InsiderSource
ALEC

Alector, Inc.

SEC CIK 1653087
$1.53 −20.7% · 90 days
90-day buys
$0
0 open-market
90-day sells
$233K
5 open-market
Net insider flow
−$233K
Net selling
Filings shown
26
Most recent
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At a glance

Over the last 90 days, insiders at ALEC have sold a net $233K of stock (0 open-market buys vs 5 sells).

Largest recent trade: Rosenthal Arnon sold $173.8K of ALEC, trimming their stake 3%.

Most active filer: Wong-sarad Grace, with 11 transactions among the recent filings shown.

Insider transaction history

Form 4 filings for ALEC, newest first
View on SEC EDGAR ↗
ALEC
Alector, Inc.
Sell Wong-Sarad Grace · Principal Accounting Officer · Open-market sale · filed 1w ago ΔOwn −3.5%

Wong-sarad Grace sold $6.5K of ALEC, trimming their stake 4%.

−$6.5K
3,475 sh @ $2
ALEC
Alector, Inc.
Sell Rosenthal Arnon · Director, Chief Executive Officer · Open-market sale · filed 1w ago ΔOwn −3.6%

Rosenthal Arnon sold $172.2K of ALEC, trimming their stake 4%.

−$172.2K
87,216 sh @ $2
ALEC
Alector, Inc.
Sell Wong-Sarad Grace · Principal Accounting Officer · Open-market sale · filed 1w ago ΔOwn −5.5%

Wong-sarad Grace sold $11.3K of ALEC, trimming their stake 5%.

−$11.3K
5,709 sh @ $2
ALEC
Alector, Inc.
Sell Berkley Neil Lindsay · CFO & Chief Business Officer · Open-market sale · filed 1w ago ΔOwn −4.8%

Berkley Neil Lindsay sold $38.2K of ALEC, trimming their stake 5%.

−$38.2K
19,360 sh @ $2
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ALEC
Alector, Inc.
Sell Wong-Sarad Grace · Principal Accounting Officer · Open-market sale · filed Apr 17, 2026 ΔOwn −1.7%

Wong-sarad Grace sold $4.8K of ALEC, trimming their stake 2%.

−$4.8K
1,820 sh @ $3
ALEC
Alector, Inc.
Grant/award Rosenthal Arnon · Director, Chief Executive Officer · Grant/award · filed Mar 13, 2026 ΔOwn +5.0%
+$0
116,246 sh
ALEC
Alector, Inc.
Sell Wong-Sarad Grace · Principal Accounting Officer · Open-market sale · filed Mar 12, 2026 ΔOwn −0.9%

Wong-sarad Grace sold $2.7K of ALEC, trimming their stake 1%.

−$2.7K
1,000 sh @ $3
ALEC
Alector, Inc.
Sell Wong-Sarad Grace · Principal Accounting Officer · Open-market sale · filed Mar 3, 2026 ΔOwn −3.0%

Wong-sarad Grace sold $7K of ALEC, trimming their stake 3%.

−$7K
3,367 sh @ $2
ALEC
Alector, Inc.
Sell Wong-Sarad Grace · Principal Accounting Officer · Open-market sale · filed Mar 3, 2026 ΔOwn −6.8%

Wong-sarad Grace sold $17.1K of ALEC, trimming their stake 7%.

−$17.1K
8,071 sh @ $2
ALEC
Alector, Inc.
Sell Rosenthal Arnon · Director, Chief Executive Officer · Open-market sale · filed Mar 3, 2026 ΔOwn −3.4%

Rosenthal Arnon sold $173.8K of ALEC, trimming their stake 3%.

−$173.8K
81,864 sh @ $2
ALEC
Alector, Inc.
Sell Berkley Neil Lindsay · CFO & Chief Business Officer · Open-market sale · filed Mar 3, 2026 ΔOwn −7.9%

Berkley Neil Lindsay sold $63K of ALEC, trimming their stake 8%.

−$63K
29,649 sh @ $2
ALEC
Alector, Inc.
Sell Wong-Sarad Grace · Principal Accounting Officer · Open-market sale · filed Feb 26, 2026 ΔOwn −3.3%

Wong-sarad Grace sold $10.2K of ALEC, trimming their stake 3%.

−$10.2K
4,079 sh @ $3
ALEC
Alector, Inc.
Sell Wong-Sarad Grace · Principal Accounting Officer · Open-market sale · filed Dec 8, 2025 ΔOwn −3.7%

Wong-sarad Grace sold $5.8K of ALEC, trimming their stake 4%.

−$5.8K
4,753 sh @ $1
ALEC
Alector, Inc.
Sell Wong-Sarad Grace · Principal Accounting Officer · Open-market sale · filed Dec 3, 2025 ΔOwn −5.9%

Wong-sarad Grace sold $9K of ALEC, trimming their stake 6%.

−$9K
8,056 sh @ $1
ALEC
Alector, Inc.
Sell Rosenthal Arnon · Director, Chief Executive Officer · Open-market sale · filed Dec 3, 2025 ΔOwn −4.1%

Rosenthal Arnon sold $116.8K of ALEC, trimming their stake 4%.

−$116.8K
104,347 sh @ $1
ALEC
Alector, Inc.
Sell Kenkare-Mitra Sara · President and Head of R&D · Open-market sale · filed Dec 3, 2025 ΔOwn −7.7%

Kenkare-mitra Sara sold $46.7K of ALEC, trimming their stake 8%.

−$46.7K
41,687 sh @ $1
ALEC
Alector, Inc.
Sell Berkley Neil Lindsay · Chief Bus Ofcr & Interim CFO · Open-market sale · filed Dec 3, 2025 ΔOwn −9.1%

Berkley Neil Lindsay sold $41.7K of ALEC, trimming their stake 9%.

−$41.7K
37,261 sh @ $1
ALEC
Alector, Inc.
Grant/award Rosenthal Arnon · Director, Chief Executive Officer · Grant/award · filed Nov 12, 2025 ΔOwn +7.4%
+$0
174,167 sh
ALEC
Alector, Inc.
Sell Wong-Sarad Grace · Principal Accounting Officer · Open-market sale · filed Sep 4, 2025 ΔOwn −5.4%

Wong-sarad Grace sold $14.8K of ALEC, trimming their stake 5%.

−$14.8K
5,910 sh @ $2
ALEC
Alector, Inc.
Sell Berkley Neil Lindsay · Principal Financial Officer · Open-market sale · filed Sep 4, 2025 ΔOwn −4.4%

Berkley Neil Lindsay sold $39.6K of ALEC, trimming their stake 4%.

−$39.6K
15,842 sh @ $2
ALEC
Alector, Inc.
Sell Kenkare-Mitra Sara · President and Head of R&D · Open-market sale · filed Sep 4, 2025 ΔOwn −4.2%

Kenkare-mitra Sara sold $59K of ALEC, trimming their stake 4%.

−$59K
23,638 sh @ $2
ALEC
Alector, Inc.
Sell Rosenthal Arnon · Director, Chief Executive Officer · Open-market sale · filed Sep 4, 2025 ΔOwn −2.1%

Rosenthal Arnon sold $128.7K of ALEC, trimming their stake 2%.

−$128.7K
51,562 sh @ $2
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About ALEC insider activity

This page tracks every recent Form 4 filed for Alector, Inc. with the U.S. Securities and Exchange Commission. Form 4 is the disclosure that company insiders — officers, directors, and holders of more than 10% of the stock — must file within two business days of buying or selling shares.

The summary above nets open-market purchases against open-market sales over the trailing 90 days. Open-market trades (codes P and S) tend to carry the most signal because they reflect a deliberate choice to put money in or take it out, as opposed to routine grants, option exercises, or tax-withholding events. Use the badges on each row to tell them apart, and always confirm details against the original filing before drawing conclusions.

Frequently asked questions

How often is ALEC insider data updated?

Continuously. We read from SEC EDGAR, so new Form 4 filings for Alector, Inc. usually appear here within minutes of being accepted by the SEC.

What does "net insider flow" mean?

It is the total dollar value of open-market insider purchases minus open-market sales over the last 90 days. A positive number (green) means insiders bought more than they sold; a negative number (red) means the reverse.

Why do some rows show grants or option exercises instead of buys?

Insiders receive stock through compensation as well as buying it outright. Form 4 captures all of these. We label each transaction by its SEC code so you can focus on open-market activity if you prefer.

Is this investment advice?

No. InsiderSource presents public filing data for informational purposes only. Insider activity is one of many factors to consider and is never a recommendation to buy or sell.