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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: 9/5/25 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
$3.01 $6.37 $0.87 $305 101 933 0.0% 6.8% 77.10% 10.37%
Exch Sector Industry Sub-Industry
NasdaqGS Manufacturing Chemicals And Allied Products Biological Products, (No Disgnostic Substances)
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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
    
 
POLARIS VENTURE MANAGEMENT CO VI L L C
BO
JS
---
98,533
---
5/29/24
---
---
---
All
D
---
5/31/24 - 5:24:23 pm
2
    
 
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
3
    
 
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
4
    
 
POLARIS VENTURE MANAGEMENT CO VI L L C
BO
JS
---
98,533
---
4/30/24
---
---
---
All
D
---
5/2/24 - 5:32:41 pm
5
    
 
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
6
    
 
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
7
    
 
ALTMEYER MARK
DIR
JB
---
41,250
---
3/19/24
---
---
41,250
New
D
R
3/21/24 - 5:01:10 pm
8
    
 
DESOUZA ERROL B
DIR
JB
---
41,250
---
3/19/24
---
---
41,250
New
D
R
3/21/24 - 5:01:08 pm
9
    
 
ALTMEYER MARK
DIR
3
---
---
---
3/19/24
---
---
---
---
D
---
3/21/24 - 5:00:20 pm
10
    
 
DESOUZA ERROL B
DIR
3
---
---
---
3/19/24
---
---
---
---
D
---
3/21/24 - 5:00:15 pm
11
    
 
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
12
    
 
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
13
    
 
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
14
    
 
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
15
    
 
GAROFALO ELIZABETH A
DIR
JS
---
9,459
---
12/5/23
---
---
26,250
-26.5
D
---
12/6/23 - 6:30:12 pm
16
    
 
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
17
    
 
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
18
    
 
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
19
    
 
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
20
    
 
ROMANO GARY
O
JB
---
108,000
---
10/1/23
---
---
207,349
108.7
D
R
10/3/23 - 6:12:44 pm
21
    
 
GRASSO MARC
CFO
JB
---
123,000
---
10/1/23
---
---
155,247
381.4
D
R
10/3/23 - 6:12:14 pm
22
    
 
KENKARE MITRA SARA
PR
JB
---
163,600
---
10/1/23
---
---
341,535
91.9
D
R
10/3/23 - 6:10:48 pm
23
    
 
ROSENTHAL ARNON
CEO,DIR
JB
---
397,600
---
10/1/23
---
---
2,043,048
24.2
D
R
10/3/23 - 6:10:00 pm
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