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Nasdaq · CIK 0001653087

ALEC Alector, Inc.

Insider trading from SEC Form 4. Last filing 38 d ago. Close $2.08 on Oct 9, 2026, +82% from the 52-week low and -37% from the high.

Last 90 days

Net insider value
-$296k
more sold than bought
Buys
0
$0 by 0 insiders
Sells
3
$296k by 3 insiders
Insiders on file
13
with a Form 4 at this company

Price and insider trades, last year

ALECOct 9, 2026 · close 2.08

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™

Signals

Open-market buys and sells at Alector, Inc., scored.

ScoreInsiderValueHoldingsPrice contextFiled
46ModerateNeil Lindsay Berkley
CFO & Chief Business Officer
sell
$78k
29,251 shares
-8%+120% from low-24% from high
52ModerateArnon Rosenthal
Chief Executive Officer
sell
$193k
72,606 shares
-3%+120% from low-24% from high
10WeakGrace Wong-Sarad
Principal Accounting Officer
sell
$25k
9,446 shares
-8%+139% from low-18% from high
10WeakGrace Wong-Sarad
Principal Accounting Officer
sell
$2,650
1,000 shares
-1%+163% from low-28% from high
51ModerateArnon Rosenthal
Chief Executive Officer
sell
$174k
81,864 shares
-3%+144% from low-33% from high
30WeakGrace Wong-Sarad
Principal Accounting Officer
sell
$17k
8,071 shares
-7%+144% from low-33% from high
10WeakGrace Wong-Sarad
Principal Accounting Officer
sell
$7,012
3,367 shares
-3%+133% from low-36% from high
45ModerateNeil Lindsay Berkley
CFO & Chief Business Officer
sell
$63k
29,649 shares
-8%+144% from low-33% from high
10WeakGrace Wong-Sarad
Principal Accounting Officer
sell
$10k
4,079 shares
-3%+183% from low-23% from high
10WeakGrace Wong-Sarad
Principal Accounting Officer
sell
$5,751
4,753 shares
-4%+35% from low-63% from high
50ModerateArnon Rosenthal
Chief Executive Officer
sell
$117k
104,347 shares
-4%+26% from low-66% from high
41ModerateSara Kenkare-Mitra
President and Head of R&D
sell
$47k
41,687 shares
-8%+26% from low-66% from high
30WeakGrace Wong-Sarad
Principal Accounting Officer
sell
$9,019
8,056 shares
-6%+26% from low-66% from high
43ModerateNeil Lindsay Berkley
Chief Bus Ofcr & Interim CFO
sell
$42k
37,261 shares
-9%+26% from low-66% from high
51ModerateArnon Rosenthal
Chief Executive Officer
sell
$129k
51,562 shares
-2%+187% from low-58% from high
42ModerateSara Kenkare-Mitra
President and Head of R&D
sell
$59k
23,638 shares
-4%+187% from low-58% from high
36WeakNeil Lindsay Berkley
Principal Financial Officer
sell
$40k
15,842 shares
-4%+187% from low-58% from high
30WeakGrace Wong-Sarad
Principal Accounting Officer
sell
$15k
5,910 shares
-5%+187% from low-58% from high
21WeakPaula Hammond
director
sell
$33k
14,000 shares
-16%+161% from low-62% from high
0WeakKristine Yaffe
director
sell
$1,440
1,000 shares
-1%+63% from low-76% from high
48ModerateArnon Rosenthal
Chief Executive Officer
sell
$70k
52,087 shares
-2%+53% from low-78% from high
40ModerateSara Kenkare-Mitra
President and Head of R&D
sell
$32k
23,890 shares
-4%+53% from low-78% from high
37WeakMarc Grasso
Chief Financial Officer
sell
$22k
16,488 shares
-5%+53% from low-78% from high
30WeakGary Romano
Chief Medical Officer
sell
$24k
16,306 shares
-5%0% from low-77% from high
47ModerateArnon Rosenthal
Chief Executive Officer
sell
$59k
40,330 shares
-2%0% from low-77% from high
41ModerateSara Kenkare-Mitra
President and Head of R&D
sell
$43k
29,073 shares
-5%0% from low-77% from high
42ModerateMarc Grasso
Chief Financial Officer
sell
$27k
18,091 shares
-5%0% from low-77% from high
36WeakGary Romano
Chief Medical Officer
sell
$38k
14,892 shares
-4%-
43ModerateSara Kenkare-Mitra
President and Head of R&D
sell
$67k
26,500 shares
-4%-
51ModerateArnon Rosenthal
Chief Executive Officer
sell
$131k
52,172 shares
-2%-
43ModerateMarc Grasso
Chief Financial Officer
sell
$42k
16,489 shares
-5%-

Planned sales

Form 144 notices filed before a sale of restricted or control stock, newest first. The sale itself usually reaches a Form 4 within days. All planned sales

FiledSellerSharesValueSale datePast 3 months
Nov 29, 2024 Arnon Rosenthal
Officer, Director
50,142
0.05% of outstanding
$130kDec 2, 2024$129k
Nov 29, 2024 Marc Grasso
Officer
15,842
0.02% of outstanding
$41kDec 2, 2024$36k
Nov 29, 2024 Sara Kenkare-Mitra
Officer
25,465
0.03% of outstanding
$66kDec 2, 2024$68k
Nov 29, 2024 Gary Romano
Officer
14,306
0.01% of outstanding
$37kDec 2, 2024$41k

Transactions

The last 61 rows filed, every code.

DateInsiderTransactionSharesPriceValueHoldings afterFiled
Sep 3, 2026Neil Lindsay Berkley
CFO & Chief Business Officer
SOpen-market sale
Common Stock
-29,251$2.66$78k350,64938 d ago
Sep 3, 2026Arnon Rosenthal
Chief Executive Officer
SOpen-market sale
Common Stock
-72,606$2.66$193k2,294,60038 d ago
Sep 2, 2026Grace Wong-Sarad
Principal Accounting Officer
SOpen-market sale
Common Stock10b5-1
-656$2.75$1,804114,80538 d ago
Sep 3, 2026Grace Wong-Sarad
Principal Accounting Officer
SOpen-market sale
Common Stock
-5,165$2.67$14k109,64038 d ago
Sep 4, 2026Grace Wong-Sarad
Principal Accounting Officer
SOpen-market sale
Common Stock10b5-1
-3,625$2.51$9,094106,01538 d ago
Mar 15, 2026Neil Lindsay Berkley
CFO & Chief Business Officer
AGrant or award
Common Stock
+54,600$0.00$0399,260Mar 13, 2026
Mar 13, 2026Arnon Rosenthal
Chief Executive Officer
AGrant or award
Common Stock
+116,246$0.00$02,454,422Mar 13, 2026
Mar 10, 2026Grace Wong-Sarad
Principal Accounting Officer
SOpen-market sale
Common Stock10b5-1
-1,000$2.65$2,650106,465Mar 12, 2026
Mar 3, 2026Grace Wong-Sarad
Principal Accounting Officer
SOpen-market sale
Common Stock10b5-1
-3,367$2.08$7,012107,465Mar 3, 2026
Mar 2, 2026Arnon Rosenthal
Chief Executive Officer
SOpen-market sale
Common Stock
-81,864$2.12$174k2,338,176Mar 3, 2026
Mar 2, 2026Grace Wong-Sarad
Principal Accounting Officer
SOpen-market sale
Common Stock
-8,071$2.12$17k110,832Mar 3, 2026
Mar 2, 2026Neil Lindsay Berkley
CFO & Chief Business Officer
SOpen-market sale
Common Stock
-29,649$2.12$63k344,660Mar 3, 2026
Feb 26, 2026Grace Wong-Sarad
Principal Accounting Officer
SOpen-market sale
Common Stock10b5-1
-4,079$2.50$10k118,903Feb 26, 2026
Dec 5, 2025Grace Wong-Sarad
Principal Accounting Officer
SOpen-market sale
Common Stock10b5-1
-4,753$1.21$5,751122,982Dec 8, 2025
Dec 3, 2025Neil Lindsay Berkley
Chief Bus Ofcr & Interim CFO
SOpen-market sale
Common Stock
-37,261$1.12$42k374,309Dec 3, 2025
Dec 3, 2025Grace Wong-Sarad
Principal Accounting Officer
SOpen-market sale
Common Stock
-8,056$1.12$9,019127,735Dec 3, 2025
Dec 3, 2025Sara Kenkare-Mitra
President and Head of R&D
SOpen-market sale
Common Stock
-41,687$1.12$47k501,652Dec 3, 2025
Dec 3, 2025Arnon Rosenthal
Chief Executive Officer
SOpen-market sale
Common Stock
-104,347$1.12$117k2,420,040Dec 3, 2025
Nov 10, 2025Arnon Rosenthal
Chief Executive Officer
AGrant or award
Common Stock
+174,167$0.00$02,524,387Nov 12, 2025
Nov 10, 2025Grace Wong-Sarad
Principal Accounting Officer
AGrant or award
Common Stock
+32,343$0.00$0135,791Nov 12, 2025
Nov 10, 2025Neil Lindsay Berkley
Chief Bus Ofcr & Interim CFO
AGrant or award
Common Stock
+65,000$0.00$0411,570Nov 12, 2025
Nov 10, 2025Grace Wong-Sarad
Principal Accounting Officer
AGrant or award
Employee Stock Option (right to buy)derivative
+48,535$0.00$048,535Nov 12, 2025
Nov 10, 2025Neil Lindsay Berkley
Chief Bus Ofcr & Interim CFO
AGrant or award
Employee Stock Option (right to buy)derivative
+195,000$0.00$0195,000Nov 12, 2025
Nov 10, 2025Arnon Rosenthal
Chief Executive Officer
AGrant or award
Employee Stock Option (right to buy)derivative
+522,500$0.00$0522,500Nov 12, 2025
Sep 2, 2025Arnon Rosenthal
Chief Executive Officer
SOpen-market sale
Common Stock
-51,562$2.50$129k2,350,220Sep 4, 2025
Sep 2, 2025Sara Kenkare-Mitra
President and Head of R&D
SOpen-market sale
Common Stock
-23,638$2.50$59k543,339Sep 4, 2025
Sep 2, 2025Neil Lindsay Berkley
Principal Financial Officer
SOpen-market sale
Common Stock
-15,842$2.50$40k346,570Sep 4, 2025
Sep 2, 2025Grace Wong-Sarad
Principal Accounting Officer
SOpen-market sale
Common Stock
-5,910$2.50$15k103,448Sep 4, 2025
Aug 26, 2025Paula Hammond
director
SOpen-market sale
Common Stock10b5-1
-14,000$2.36$33k74,909Aug 27, 2025
Jul 1, 2025Neil Lindsay Berkley
Principal Financial Officer
AGrant or award
Employee Stock Option (right to buy)derivative
+18,000$0.00$018,000Jul 1, 2025
Jul 1, 2025Sara Kenkare-Mitra
President and Head of R&D
AGrant or award
Common Stock
+54,725$0.00$0566,977Jul 1, 2025
Jul 1, 2025Arnon Rosenthal
Chief Executive Officer
AGrant or award
Common Stock
+137,125$0.00$02,551,782Jul 1, 2025
Jul 1, 2025Sara Kenkare-Mitra
President and Head of R&D
AGrant or award
Employee Stock Option (right to buy)derivative
+18,250$0.00$018,250Jul 1, 2025
Jul 1, 2025Arnon Rosenthal
Chief Executive Officer
AGrant or award
Employee Stock Option (right to buy)derivative
+45,700$0.00$045,700Jul 1, 2025
Jun 20, 2025Kristine Yaffe
director
SOpen-market sale
Common Stock10b5-1
-1,000$1.44$1,44095,409Jun 23, 2025
Jun 11, 2025Mark Altmeyer
director
AGrant or award
Common Stock
+28,700$0.00$069,950Jun 12, 2025
Jun 11, 2025Paula Hammond
director
AGrant or award
Common Stock
+28,700$0.00$088,909Jun 12, 2025
Jun 11, 2025Kristine Yaffe
director
AGrant or award
Common Stock
+28,700$0.00$096,409Jun 12, 2025
Jun 11, 2025Elizabeth A. Garofalo
director
AGrant or award
Common Stock
+28,700$0.00$089,950Jun 12, 2025
Jun 11, 2025Richard H Scheller
director
AGrant or award
Common Stock
+28,700$0.00$095,366Jun 12, 2025
Jun 11, 2025Louis J Lavigne Jr
director
AGrant or award
Common Stock
+28,700$0.00$099,409Jun 12, 2025
Jun 11, 2025Errol B Desouza
director
AGrant or award
Common Stock
+28,700$0.00$069,950Jun 12, 2025
Jun 11, 2025Richard H Scheller
director
AGrant or award
Stock Option (right to buy)derivative
+9,450$0.00$09,450Jun 12, 2025
Jun 11, 2025Errol B Desouza
director
AGrant or award
Stock Option (right to buy)derivative
+9,450$0.00$09,450Jun 12, 2025
Jun 11, 2025Elizabeth A. Garofalo
director
AGrant or award
Stock Option (right to buy)derivative
+9,450$0.00$09,450Jun 12, 2025
Jun 11, 2025Kristine Yaffe
director
AGrant or award
Stock Option (right to buy)derivative
+9,450$0.00$09,450Jun 12, 2025
Jun 11, 2025Mark Altmeyer
director
AGrant or award
Stock Option (right to buy)derivative
+9,450$0.00$09,450Jun 12, 2025
Jun 11, 2025Paula Hammond
director
AGrant or award
Stock Option (right to buy)derivative
+9,450$0.00$09,450Jun 12, 2025
Jun 11, 2025Louis J Lavigne Jr
director
AGrant or award
Stock Option (right to buy)derivative
+9,450$0.00$09,450Jun 12, 2025
Jun 2, 2025Sara Kenkare-Mitra
President and Head of R&D
SOpen-market sale
Common Stock
-23,890$1.34$32k512,252Jun 4, 2025
Jun 2, 2025Marc Grasso
Chief Financial Officer
SOpen-market sale
Common Stock
-16,488$1.34$22k296,072Jun 4, 2025
Jun 2, 2025Arnon Rosenthal
Chief Executive Officer
SOpen-market sale
Common Stock
-52,087$1.34$70k2,414,657Jun 4, 2025
May 2, 2025Richard H Scheller
director
AGrant or award
Common Stock
+15,833$0.00$066,666May 2, 2025
Mar 3, 2025Gary Romano
Chief Medical Officer
SOpen-market sale
Common Stock
-16,306$1.47$24k332,977Mar 5, 2025
Mar 3, 2025Arnon Rosenthal
Chief Executive Officer
SOpen-market sale
Common Stock
-40,330$1.47$59k2,466,744Mar 5, 2025
Mar 3, 2025Sara Kenkare-Mitra
President and Head of R&D
SOpen-market sale
Common Stock
-29,073$1.47$43k536,142Mar 5, 2025
Mar 3, 2025Marc Grasso
Chief Financial Officer
SOpen-market sale
Common Stock
-18,091$1.47$27k312,560Mar 5, 2025
Dec 2, 2024Gary Romano
Chief Medical Officer
SOpen-market sale
Common Stock
-14,892$2.52$38k349,283Dec 3, 2024
Dec 2, 2024Sara Kenkare-Mitra
President and Head of R&D
SOpen-market sale
Common Stock
-26,500$2.52$67k565,215Dec 3, 2024
Dec 2, 2024Arnon Rosenthal
Chief Executive Officer
SOpen-market sale
Common Stock
-52,172$2.52$131k2,507,074Dec 3, 2024
Dec 2, 2024Marc Grasso
Chief Financial Officer
SOpen-market sale
Common Stock
-16,489$2.52$42k330,651Dec 3, 2024

Insiders

Everyone who has filed a Form 4 here.

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

ALEC insider trading: Alector, Inc. | InsiderTell