United States Biotechnology & Medical Research

Alector Inc (ALEC)

Track

Alector Inc. experienced significant insider selling over the past ninety days, totaling approximately $221,682 in net value. Key executives, including the CEO and CFO, offloaded shares amid a 13.2% decline in stock performance. These transactions occurred following the most recent earnings report, which showed a 12.5% positive surprise in earnings per share.
Ticker: ALEC Exchange: NSM
Preparing chart...
Download chart Copy chart image Copy link Share to X Share


• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
Upgrade for signal details

Upgrade to see score, net flow, insiders and context.

Upgrade to see full signal details →

Insider trades have triggered activity signals for Alector Inc. Upgrade to see score, net flow, insiders and the full signal context.

Open in Activity Signals screener →
Top insiders
Trades
Planned sale 3 Jun 2026
Value US$3,200,468.20 | Price 223.95 | Shares 43,769 (-23.1%)
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-06-03 2026-06-03 PlS Planned sale
2.2
Wong-Sarad Grace

Principal Accounting Officer

Officer
43,769 -23.1%
223.95
US$3,200,468 		43,769 -23.1% 223.95 US$3,200,468
2026-06-03 2026-06-03 PrS Proposed sale
2.2
GRACE WONG-SARAD

Officer

Officer
1,935
270.92
US$4,616,133 		1,935 270.92 US$4,616,133
2026-06-03 2026-06-02 S Sale
2.2
Wong-Sarad Grace

Principal Accounting Officer

Officer
70,334 +18.7%
487.96
US$2,174,413 		70,334 +18.7% 487.96 US$2,174,413
2026-06-03 2026-06-02 S Sale
3.2
Rosenthal Arnon

Chief Executive Officer

Executive Director
87,216 -3.6%
1.97
US$172,191 		87,216 -3.6% 1.97 US$172,191
2026-06-03 2026-06-02 S Sale
2.0
Berkley Neil Lindsay

CFO & Chief Business Officer

Officer
19,360 -4.8%
1.97
US$38,221 		19,360 -4.8% 1.97 US$38,221
2026-06-01 2026-06-02 PrS Proposed sale
2.2
Grace Wong-Sarad

Officer

Officer
5,239
2.07
US$10,845 		5,239 2.07 US$10,845
2026-06-01 2026-06-02 PrS Proposed sale
2.0
Neil L. Berkley

Officer

Officer
18,213
2.07
US$37,701 		18,213 2.07 US$37,701
2026-06-01 2026-06-02 PrS Proposed sale
3.2
Arnon Rosenthal

Officer; Director

Executive Director
67,572
2.07
US$139,874 		67,572 2.07 US$139,874
2026-04-17 2026-04-16 PlS Planned sale
2.2
Wong-Sarad Grace

Principal Accounting Officer

Officer
1,820 -1.7%
2.65
US$4,823 		1,820 -1.7% 2.65 US$4,823
2026-04-16 2026-04-16 PrS Proposed sale
2.2
GRACE WONG-SARAD

Officer

Officer
1,820
2.65
US$4,823 		1,820 2.65 US$4,823
2026-03-12 2026-03-10 PlS Planned sale
2.2
Wong-Sarad Grace

Principal Accounting Officer

Officer
1,000 -0.9%
2.65
US$2,650 		1,000 -0.9% 2.65 US$2,650
2026-03-10 2026-03-10 PrS Proposed sale
2.2
GRACE WONG-SARAD

Officer

Officer
1,000
2.65
US$2,650 		1,000 2.65 US$2,650
2026-03-03 2026-03-03 PlS Planned sale
2.2
Wong-Sarad Grace

Principal Accounting Officer

Officer
3,367 -3.0%
2.08
US$7,012 		3,367 -3.0% 2.08 US$7,012
2026-03-03 2026-03-03 PrS Proposed sale
2.2
GRACE WONG-SARAD

Officer

Officer
3,367
2.08
US$7,012 		3,367 2.08 US$7,012
2026-03-03 2026-03-02 S Sale
2.2
Wong-Sarad Grace

Principal Accounting Officer

Officer
8,071 -6.8%
2.12
US$17,138 		8,071 -6.8% 2.12 US$17,138
2026-03-03 2026-03-02 S Sale
3.2
Rosenthal Arnon

Chief Executive Officer

Executive Director
81,864 -3.4%
2.12
US$173,822 		81,864 -3.4% 2.12 US$173,822
2026-03-03 2026-03-02 S Sale
2.0
Berkley Neil Lindsay

CFO & Chief Business Officer

Officer
29,649 -7.9%
2.12
US$62,954 		29,649 -7.9% 2.12 US$62,954
2026-02-27 2026-03-02 PrS Proposed sale
2.0
Neil L. Berkley

Officer

Officer
23,161
2.43
US$56,281 		23,161 2.43 US$56,281
2026-02-27 2026-03-02 PrS Proposed sale
3.2
Arnon Rosenthal

Officer; Director

Executive Director
67,571
2.43
US$164,198 		67,571 2.43 US$164,198
2026-02-27 2026-03-02 PrS Proposed sale
2.2
Grace Wong-Sarad

Officer

Officer
6,297
2.43
US$15,302 		6,297 2.43 US$15,302
2026-02-26 2026-02-26 PlS Planned sale
2.2
Wong-Sarad Grace

Principal Accounting Officer

Officer
4,079 -3.3%
2.50
US$10,198 		4,079 -3.3% 2.50 US$10,198
2026-02-26 2026-02-26 PrS Proposed sale
2.2
GRACE WONG-SARAD

Officer

Officer
4,079
2.50
US$10,198 		4,079 2.50 US$10,198
2025-12-08 2025-12-05 PlS Planned sale
2.2
Wong-Sarad Grace

Principal Accounting Officer

Officer
4,753 -3.7%
1.21
US$5,751 		4,753 -3.7% 1.21 US$5,751
2025-12-05 2025-12-05 PrS Proposed sale
2.2
GRACE WONG-SARAD

Officer

Officer
4,753
1.21
US$5,751 		4,753 1.21 US$5,751
2025-12-03 2025-12-03 S Sale
3.6
Kenkare-Mitra Sara

President and Head of R&D

Officer
41,687 -7.7%
1.12
US$46,673 		41,687 -7.7% 1.12 US$46,673
2025-12-03 2025-12-03 S Sale
2.2
Wong-Sarad Grace

Principal Accounting Officer

Officer
8,056 -5.9%
1.12
US$9,019 		8,056 -5.9% 1.12 US$9,019
2025-12-03 2025-12-03 S Sale
3.2
Rosenthal Arnon

Chief Executive Officer

Executive Director
104,347 -4.1%
1.12
US$116,827 		104,347 -4.1% 1.12 US$116,827
2025-12-03 2025-12-03 S Sale
2.0
Berkley Neil Lindsay

Chief Bus Ofcr & Interim CFO

Officer
37,261 -9.1%
1.12
US$41,717 		37,261 -9.1% 1.12 US$41,717
2025-12-01 2025-12-01 PrS Proposed sale
3.2
Arnon Rosenthal

Officer; Director

Executive Director
92,427
1.23
US$113,685 		92,427 1.23 US$113,685
2025-12-01 2025-12-01 PrS Proposed sale
2.0
Neil L. Berkley

Officer

Officer
32,992
1.23
US$40,580 		32,992 1.23 US$40,580
2025-12-01 2025-12-01 PrS Proposed sale
2.2
Grace Wong-Sarad

Officer

Officer
7,085
1.23
US$8,715 		7,085 1.23 US$8,715
2025-12-01 2025-12-01 PrS Proposed sale
3.6
Sara Kenkare-Mitra

Officer

Officer
36,914
1.23
US$45,404 		36,914 1.23 US$45,404
2025-09-04 2025-09-02 S Sale
2.0
Berkley Neil Lindsay

Principal Financial Officer

Officer
15,842 -4.4%
2.50
US$39,554 		15,842 -4.4% 2.50 US$39,554
2025-09-04 2025-09-02 S Sale
2.2
Wong-Sarad Grace

Principal Accounting Officer

Officer
5,910 -5.4%
2.50
US$14,756 		5,910 -5.4% 2.50 US$14,756
2025-09-04 2025-09-02 S Sale
3.6
Kenkare-Mitra Sara

President and Head of R&D

Officer
23,638 -4.2%
2.50
US$59,019 		23,638 -4.2% 2.50 US$59,019
2025-09-04 2025-09-02 S Sale
3.2
Rosenthal Arnon

Chief Executive Officer

Executive Director
51,562 -2.1%
2.50
US$128,740 		51,562 -2.1% 2.50 US$128,740
2025-08-29 2025-09-02 PrS Proposed sale
2.0
Neil L. Berkley

Officer

Officer
15,426
2.35
US$36,251 		15,426 2.35 US$36,251
2025-08-29 2025-09-02 PrS Proposed sale
2.2
Grace Wong-Sarad

Officer

Officer
5,717
2.35
US$13,435 		5,717 2.35 US$13,435
2025-08-29 2025-09-02 PrS Proposed sale
3.6
Sara Kenkare-Mitra

Officer

Officer
23,019
2.35
US$54,095 		23,019 2.35 US$54,095
2025-08-29 2025-09-02 PrS Proposed sale
3.2
Arnon Rosenthal

Officer; Director

Executive Director
50,242
2.35
US$118,069 		50,242 2.35 US$118,069
2025-08-27 2025-08-26 PlS Planned sale
Hammond Paula
Non-Executive Director
14,000 -15.7%
2.36
US$32,998 		14,000 -15.7% 2.36 US$32,998
2025-08-26 2025-08-26 PrS Proposed sale
PAULA HAMMOND

Director

Non-Executive Director
14,000
2.36
US$32,997 		14,000 2.36 US$32,997
2025-08-08 2025-08-08 PrS Proposed sale
3.9
MARC GRASSO

Officer

Officer
76,446
2.00
US$152,892 		76,446 2.00 US$152,892
2025-06-23 2025-06-20 S Sale
0.5
Yaffe Kristine
Non-Executive Director
1,000 -1.0%
1.44
US$1,440 		1,000 -1.0% 1.44 US$1,440
2025-06-04 2025-06-02 S Sale
3.6
Kenkare-Mitra Sara

President and Head of R&D

Officer
23,890 -4.5%
1.34
US$31,974 		23,890 -4.5% 1.34 US$31,974
2025-06-04 2025-06-02 S Sale
3.9
GRASSO MARC

Chief Financial Officer

Officer
16,488 -5.3%
1.34
US$22,068 		16,488 -5.3% 1.34 US$22,068
2025-06-04 2025-06-02 S Sale
3.2
Rosenthal Arnon

Chief Executive Officer

Executive Director
52,087 -2.1%
1.34
US$69,713 		52,087 -2.1% 1.34 US$69,713
2025-05-30 2025-06-02 PrS Proposed sale
3.6
Sara Kenkare-Mitra

Officer

Officer
23,020
1.33
US$30,617 		23,020 1.33 US$30,617
2025-05-30 2025-06-02 PrS Proposed sale
3.2
Arnon Rosenthal

Officer; Director

Executive Director
50,242
1.33
US$66,822 		50,242 1.33 US$66,822
2025-05-30 2025-06-02 PrS Proposed sale
3.9
Marc Grasso

Officer

Officer
15,873
1.33
US$21,111 		15,873 1.33 US$21,111
2025-03-05 2025-03-03 S Sale
3.9
GRASSO MARC

Chief Financial Officer

Officer
18,091 -5.5%
1.47
US$26,547 		18,091 -5.5% 1.47 US$26,547
2025-03-05 2025-03-03 S Sale
4.1
Romano Gary

Chief Medical Officer

Officer
16,306 -4.7%
1.47
US$23,927 		16,306 -4.7% 1.47 US$23,927
2025-03-05 2025-03-03 S Sale
3.2
Rosenthal Arnon

Chief Executive Officer

Executive Director
40,330 -1.6%
1.47
US$59,176 		40,330 -1.6% 1.47 US$59,176
2025-03-05 2025-03-03 S Sale
3.6
Kenkare-Mitra Sara

President and Head of R&D

Officer
29,073 -5.1%
1.47
US$42,662 		29,073 -5.1% 1.47 US$42,662
2025-02-28 2025-03-03 PrS Proposed sale
4.1
Gary Romano

Officer

Officer
14,306
1.64
US$23,462 		14,306 1.64 US$23,462
2025-02-28 2025-03-03 PrS Proposed sale
3.2
Arnon Rosenthal

Officer; Director

Executive Director
50,242
1.64
US$82,397 		50,242 1.64 US$82,397
2025-02-28 2025-03-03 PrS Proposed sale
3.9
Marc Grasso

Officer

Officer
15,873
1.64
US$26,032 		15,873 1.64 US$26,032
2025-02-28 2025-03-03 PrS Proposed sale
3.6
Sara Kenkare-Mitra

Officer

Officer
25,516
1.64
US$41,846 		25,516 1.64 US$41,846
2024-12-03 2024-12-02 S Sale
3.9
GRASSO MARC

Chief Financial Officer

Officer
16,489 -4.7%
2.52
US$41,542 		16,489 -4.7% 2.52 US$41,542
2024-12-03 2024-12-02 S Sale
4.1
Romano Gary

Chief Medical Officer

Officer
14,892 -4.1%
2.52
US$37,519 		14,892 -4.1% 2.52 US$37,519
2024-12-03 2024-12-02 S Sale
3.6
Kenkare-Mitra Sara

President and Head of R&D

Officer
26,500 -4.5%
2.52
US$66,764 		26,500 -4.5% 2.52 US$66,764
2024-12-03 2024-12-02 S Sale
3.2
Rosenthal Arnon

Chief Executive Officer

Executive Director
52,172 -2.0%
2.52
US$131,442 		52,172 -2.0% 2.52 US$131,442
2024-11-29 2024-12-02 PrS Proposed sale
4.1
Gary Romano

Officer

Officer
14,306
2.59
US$37,053 		14,306 2.59 US$37,053
2024-11-29 2024-12-02 PrS Proposed sale
3.6
Sara Kenkare-Mitra

Officer

Officer
25,465
2.59
US$65,954 		25,465 2.59 US$65,954
2024-11-29 2024-12-02 PrS Proposed sale
3.9
Marc Grasso

Officer

Officer
15,842
2.59
US$41,031 		15,842 2.59 US$41,031
2024-11-29 2024-12-02 PrS Proposed sale
3.2
Arnon Rosenthal

Officer; Director

Executive Director
50,142
2.59
US$129,868 		50,142 2.59 US$129,868
2024-09-04 2024-09-03 S Sale
3.6
Kenkare-Mitra Sara

President and Head of R&D

Officer
13,926 -4.6%
4.88
US$67,981 		13,926 -4.6% 4.88 US$67,981
2024-09-04 2024-09-03 S Sale
3.2
Rosenthal Arnon

Chief Executive Officer

Executive Director
26,499 -1.3%
4.88
US$129,387 		26,499 -1.3% 4.88 US$129,387
2024-09-04 2024-09-03 S Sale
4.1
Romano Gary

Chief Medical Officer

Officer
8,478 -4.5%
4.88
US$41,385 		8,478 -4.5% 4.88 US$41,385
2024-09-04 2024-09-03 S Sale
3.9
GRASSO MARC

Chief Financial Officer

Officer
7,297 -5.3%
4.88
US$35,620 		7,297 -5.3% 4.88 US$35,620
2024-08-30 2024-09-03 PrS Proposed sale
3.2
Arnon Rosenthal

Officer; Director

Executive Director
24,359
5.28
US$128,616 		24,359 5.28 US$128,616
2024-08-30 2024-09-03 PrS Proposed sale
3.9
Marc Grasso

Officer

Officer
6,703
5.28
US$35,392 		6,703 5.28 US$35,392
2024-08-30 2024-09-03 PrS Proposed sale
3.6
Sara Kenkare-Mitra

Officer

Officer
12,796
5.28
US$67,563 		12,796 5.28 US$67,563
2024-08-30 2024-09-03 PrS Proposed sale
4.1
Gary Romano

Officer

Officer
7,788
5.28
US$41,121 		7,788 5.28 US$41,121
2024-08-23 2024-08-22 S Sale
2.4
SCHELLER RICHARD H
Non-Executive Director
44,250 -55.8%
5.16
US$228,388 		44,250 -55.8% 5.16 US$228,388
Explore more

More insider trading research around Alector Inc

More insider trades in United States
Similar Healthcare companies with insider activity
More Pharmaceuticals & Medical Research companies with insider activity
More Biotechnology & Medical Research companies with insider activity
Insider trading in North America