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Transaction Types Key To InsiderInsights' Infobase
 B  AB  JB*  OB  OE*  OE
 S  AS  JS*  OS  OS*  3
 JB
 JS
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Detailed Insider History for:
ALECTOR INC: ALEC
Price: 12/20/24 52-Wk
High		 52-Wk
Low		 Mkt Cap (mm) Shrs Out (mm) 3-Mth Ave
Vol (m)		 Ind. Yield Short Int
% Float		 Inst. Owned Insider Owned
$1.86 $8.90 $1.73 $182 98 1,080 0.0% 7.8% 95.87% 9.97%
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#
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Insider Statistics
T N H M S
Filer Name
Insider Title
Trans Type
Dollar Value
Shares Traded
Trans Date From
Trans Date To
Trans Price From
Trans Price To
Total Holdings
Delta % Owned
Owned
Other Info
Input Date
1
    
 
GRASSO MARC
CFO
S
$41,542
16,489
---
12/2/24
---
$2.52
330,651
-4.7
D
R
12/3/24 - 5:40:06 pm
2
    
 
ROSENTHAL ARNON
CEO,DIR
S
$131,442
52,172
---
12/2/24
---
$2.52
2,507,074
-2.0
D
R
12/3/24 - 5:40:05 pm
3
    
 
KENKARE MITRA SARA
PR
S
$66,764
26,500
---
12/2/24
---
$2.52
565,215
-4.5
D
R
12/3/24 - 5:40:03 pm
4
    
 
ROMANO GARY
O
S
$37,519
14,892
---
12/2/24
---
$2.52
349,283
-4.1
D
R
12/3/24 - 5:40:03 pm
5
    
 
GRASSO MARC
CFO
JB
---
216,400
---
10/1/24
---
---
347,140
165.5
D
R
10/2/24 - 4:05:45 pm
6
    
 
KENKARE MITRA SARA
PR
JB
---
300,000
---
10/1/24
---
---
591,715
102.8
D
R
10/2/24 - 4:05:07 pm
7
    
 
ROSENTHAL ARNON
CEO,DIR
JB
---
610,500
---
10/1/24
---
---
2,559,246
31.3
D
R
10/2/24 - 4:05:06 pm
8
    
 
ROMANO GARY
O
JB
---
184,380
---
10/1/24
---
---
364,175
102.6
D
R
10/2/24 - 4:05:03 pm
9
    
 
GRASSO MARC
CFO
S
$35,620
7,297
---
9/3/24
---
$4.88
130,740
-5.3
D
R
9/4/24 - 4:44:48 pm
10
    
 
ROSENTHAL ARNON
CEO,DIR
S
$129,387
26,499
---
9/3/24
---
$4.88
1,948,746
-1.3
D
R
9/4/24 - 4:15:30 pm
11
    
 
KENKARE MITRA SARA
PR
S
$67,981
13,926
---
9/3/24
---
$4.88
291,715
-4.6
D
R
9/4/24 - 4:15:27 pm
12
    
 
ROMANO GARY
O
S
$41,385
8,478
---
9/3/24
---
$4.88
179,795
-4.5
D
R
9/4/24 - 4:15:25 pm
13
1y
3
100%
-48%
7
SCHELLER RICHARD H
DIR
S
$228,388
44,250
---
8/22/24
---
$5.16
35,000
-55.8
D
---
8/23/24 - 4:05:04 pm
14
    
 
HAMMOND PAULA
DIR
AS
$53,179
10,500
---
8/12/24
---
$5.06
60,209
-14.8
D
10b
8/13/24 - 7:55:04 pm
15
    
 
YAFFE KRISTINE
DIR
AS
$25,309
5,000
---
8/12/24
---
$5.06
67,709
-6.9
D
10b
8/13/24 - 7:55:03 pm
16
    
 
SCHELLER RICHARD H
DIR
JB
---
15,833
---
8/2/24
---
---
50,833
45.2
D
R
10/10/24 - 4:05:06 pm
17
    
 
LAVIGNE LOUIS J JR
DIR
JB
---
35,000
---
6/12/24
---
---
70,709
98.0
D
R
6/12/24 - 4:46:10 pm
18
    
 
YAFFE KRISTINE
DIR
JB
---
35,000
---
6/12/24
---
---
72,709
92.8
D
R
6/12/24 - 4:46:09 pm
19
    
 
GAROFALO ELIZABETH A
DIR
JB
---
35,000
---
6/12/24
---
---
61,250
133.3
D
R
6/12/24 - 4:46:08 pm
20
    
 
SCHELLER RICHARD H
DIR
JB
---
35,000
---
6/12/24
---
---
79,250
79.1
D
R
6/12/24 - 4:46:06 pm
21
    
 
WEHNER DAVID M
DIR
JB
---
35,000
---
6/12/24
---
---
115,330
43.6
D
R
6/12/24 - 4:46:05 pm
22
    
 
HAMMOND PAULA
DIR
JB
---
35,000
---
6/12/24
---
---
70,709
98.0
D
R
6/12/24 - 4:46:03 pm
23
    
 
ROMANO GARY
O
S
$38,582
8,040
---
6/3/24
---
$4.80
188,273
-4.1
D
R
6/4/24 - 6:05:06 pm
24
    
 
KENKARE MITRA SARA
PR
S
$63,373
13,206
---
6/3/24
---
$4.80
305,641
-4.1
D
R
6/4/24 - 6:05:05 pm
25
    
 
ROSENTHAL ARNON
CEO,DIR
S
$120,618
25,135
---
6/3/24
---
$4.80
1,975,245
-1.3
D
R
6/4/24 - 6:05:04 pm
26
    
 
GRASSO MARC
CFO
S
$33,208
6,920
---
6/3/24
---
$4.80
138,037
-4.8
D
R
6/4/24 - 6:05:03 pm
27
    
 
POLARIS VENTURE MANAGEMENT CO VI L L C
BO
JS
---
98,533
---
5/29/24
---
---
---
All
D
---
5/31/24 - 5:24:23 pm
28
    
 
POLARIS VENTURE MANAGEMENT CO VI L L C
BO
JS
---
500,000
---
5/29/24
---
---
9,853,817
-4.8
I
---
5/31/24 - 5:24:23 pm
29
    
 
POLARIS VENTURE MANAGEMENT CO VI L L C
BO
JB
---
98,533
---
5/29/24
---
---
98,533
New
D
---
5/31/24 - 5:24:23 pm
30
    
 
POLARIS VENTURE MANAGEMENT CO VI L L C
BO
JS
---
500,000
---
4/30/24
---
---
10,353,817
-4.6
I
---
5/2/24 - 5:32:41 pm
31
    
 
POLARIS VENTURE MANAGEMENT CO VI L L C
BO
JS
---
98,533
---
4/30/24
---
---
---
All
D
---
5/2/24 - 5:32:41 pm
32
    
 
POLARIS VENTURE MANAGEMENT CO VI L L C
BO
JB
---
98,533
---
4/30/24
---
---
98,533
New
D
---
5/2/24 - 5:32:41 pm
33
    
 
ALTMEYER MARK
DIR
JB
---
41,250
---
3/19/24
---
---
41,250
New
D
R
3/21/24 - 5:01:10 pm
34
    
 
DESOUZA ERROL B
DIR
JB
---
41,250
---
3/19/24
---
---
41,250
New
D
R
3/21/24 - 5:01:08 pm
35
    
 
ALTMEYER MARK
DIR
3
---
---
---
3/19/24
---
---
---
---
D
---
3/21/24 - 5:00:20 pm
36
    
 
DESOUZA ERROL B
DIR
3
---
---
---
3/19/24
---
---
---
---
D
---
3/21/24 - 5:00:15 pm
37
    
 
GRASSO MARC
CFO
S
$39,562
5,716
---
3/4/24
---
$6.92
144,957
-3.8
D
R
3/5/24 - 6:00:22 pm
38
    
 
ROSENTHAL ARNON
CEO,DIR
S
$130,386
18,837
---
3/4/24
---
$6.92
2,000,380
-0.9
D
R
3/5/24 - 6:00:21 pm
39
    
 
ROMANO GARY
O
S
$41,554
6,001
---
3/4/24
---
$6.92
196,313
-3.0
D
R
3/5/24 - 6:00:19 pm
40
    
 
KENKARE MITRA SARA
PR
S
$70,387
10,169
---
3/4/24
---
$6.92
318,847
-3.1
D
R
3/5/24 - 6:00:14 pm
41
    
 
GAROFALO ELIZABETH A
DIR
JS
---
9,459
---
12/5/23
---
---
26,250
-26.5
D
---
12/6/23 - 6:30:12 pm
42
    
 
GRASSO MARC
CFO
S
$25,431
4,574
---
12/4/23
---
$5.56
150,673
-2.9
D
R
12/6/23 - 6:30:16 pm
43
    
 
ROMANO GARY
O
S
$27,995
5,035
---
12/4/23
---
$5.56
202,314
-2.4
D
R
12/6/23 - 6:30:14 pm
44
    
 
ROSENTHAL ARNON
CEO,DIR
S
$132,500
23,831
---
12/4/23
---
$5.56
2,019,217
-1.2
D
R
12/6/23 - 6:30:09 pm
45
    
 
KENKARE MITRA SARA
PR
S
$69,606
12,519
---
12/4/23
---
$5.56
329,016
-3.7
D
R
12/6/23 - 6:30:06 pm
46
    
 
ROMANO GARY
O
JB
---
108,000
---
10/1/23
---
---
207,349
108.7
D
R
10/3/23 - 6:12:44 pm
47
    
 
GRASSO MARC
CFO
JB
---
123,000
---
10/1/23
---
---
155,247
381.4
D
R
10/3/23 - 6:12:14 pm
48
    
 
KENKARE MITRA SARA
PR
JB
---
163,600
---
10/1/23
---
---
341,535
91.9
D
R
10/3/23 - 6:10:48 pm
49
    
 
ROSENTHAL ARNON
CEO,DIR
JB
---
397,600
---
10/1/23
---
---
2,043,048
24.2
D
R
10/3/23 - 6:10:00 pm
50
1y
2
100%
-13%
3
POLARIS VENTURE MANAGEMENT CO VI L L C
BO
S
$3,000,000
500,000
---
9/11/23
---
$6.00
10,853,817
-4.4
I
---
9/13/23 - 4:33:40 pm
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