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 B  AB  JB*  OB  OE*  OE
 S  AS  JS*  OS  OS*  3
 JB
 JS
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Detailed Insider History for:
DAY ONE BIOPHARMACEUTICALS INC: DAWN
Price: 4/30/26 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
$21.53 $21.53 $5.64 $2,225 103 4,114 0.0% 7.5% 83.49% 16.82%
Exch Sector Industry Sub-Industry
NasdaqGS Manufacturing Chemicals And Allied Products Pharmaceutical Preparations
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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
    
 
AI DAY1 LLC
BO
JS
$277,980,416
12,929,322
---
4/23/26
---
$21.50
---
All
D
---
4/27/26 - 5:27:00 pm
2
    
 
BENDER JEREMY
CEO,DIR
JS
---
1,594,388
---
4/23/26
---
---
---
All
I
R
4/23/26 - 4:40:56 pm
3
    
 
BENDER JEREMY
CEO,DIR
JS
---
204,643
---
4/23/26
---
---
---
All
D
R
4/23/26 - 4:40:56 pm
4
    
 
VASCONCELLES MICHAEL
O
JS
---
4,397
---
4/23/26
---
---
---
All
D
R
4/23/26 - 4:39:50 pm
5
    
 
YORK CHARLES N II
COO,CFO
JS
---
312,025
---
4/23/26
---
---
---
All
D
R
4/23/26 - 4:39:05 pm
6
    
 
DUBOW ADAM
GC,SEC
JS
---
72,694
---
4/23/26
---
---
---
All
D
R
4/23/26 - 4:38:15 pm
7
    
 
HOLLES NATALIE C
DIR
JS
---
57,310
---
4/23/26
---
---
---
All
D
R
4/23/26 - 4:37:25 pm
8
    
 
RAMASASTRY SAIRA
DIR
JS
---
40,485
---
4/23/26
---
---
---
All
D
R
4/23/26 - 4:36:33 pm
9
    
 
JOSEY JOHN A
DIR
JS
---
72,292
---
4/23/26
---
---
---
All
D
R
4/23/26 - 4:35:39 pm
10
    
 
MERENDINO LAUREN
O
JS
---
60,157
---
4/23/26
---
---
---
All
D
R
4/23/26 - 4:30:00 pm
11
    
 
MERENDINO LAUREN
O
S
$67,448
5,814
---
2/17/26
---
$11.60
60,157
-8.8
D
R
2/18/26 - 5:18:49 pm
12
1y
6
83%
-27%
2
DUBOW ADAM
GC,SEC
S
$74,188
6,395
---
2/17/26
---
$11.60
72,694
-8.1
D
R
2/18/26 - 5:17:40 pm
13
1y
23
87%
-31%
2
YORK CHARLES N II
COO,CFO
S
$70,359
6,065
---
2/17/26
---
$11.60
312,025
-1.9
D
R
2/18/26 - 5:16:10 pm
14
    
 
BENDER JEREMY
CEO,DIR
S
$179,338
15,459
---
2/17/26
---
$11.60
204,603
-7.0
D
R
2/18/26 - 5:14:55 pm
15
    
 
VASCONCELLES MICHAEL
O
S
$31,647
2,728
---
2/17/26
---
$11.60
4,397
-38.3
D
R
2/18/26 - 5:13:17 pm
16
    
 
MERENDINO LAUREN
O
JB
---
15,162
---
2/15/26
---
---
65,971
29.8
D
R
2/18/26 - 5:18:49 pm
17
    
 
DUBOW ADAM
GC,SEC
JB
---
16,463
---
2/15/26
---
---
79,089
26.3
D
R
2/18/26 - 5:17:40 pm
18
    
 
YORK CHARLES N II
COO,CFO
JB
---
23,375
---
2/15/26
---
---
318,090
7.9
D
R
2/18/26 - 5:16:10 pm
19
    
 
BENDER JEREMY
CEO,DIR
JB
---
42,937
---
2/15/26
---
---
220,102
24.2
D
R
2/18/26 - 5:14:55 pm
20
    
 
VASCONCELLES MICHAEL
O
JB
---
7,125
---
2/15/26
---
---
7,125
New
D
R
2/18/26 - 5:13:17 pm
21
    
 
BENDER JEREMY
CEO,DIR
JS
---
614,450
---
11/25/25
---
---
---
All
I
---
11/26/25 - 4:10:24 pm
22
    
 
BENDER JEREMY
CEO,DIR
JB
---
600,000
---
11/25/25
---
---
300,000
---
I
---
11/26/25 - 4:10:24 pm
23
1y
6
83%
-27%
2
DUBOW ADAM
GC,SEC
S
$38,503
4,319
---
11/17/25
---
$8.91
62,626
-6.5
D
R
11/18/25 - 7:04:11 pm
24
1y
23
87%
-31%
2
YORK CHARLES N II
COO,CFO
S
$36,212
4,062
---
11/17/25
---
$8.91
294,715
-1.4
D
R
11/18/25 - 7:02:25 pm
25
    
 
MERENDINO LAUREN
O
S
$33,216
3,726
---
11/17/25
---
$8.91
50,809
-6.8
D
R
11/18/25 - 7:00:31 pm
26
    
 
BENDER JEREMY
CEO,DIR
S
$141,690
15,894
---
11/17/25
---
$8.91
177,165
-8.2
D
R
11/18/25 - 6:59:24 pm
27
    
 
DUBOW ADAM
GC,SEC
JB
---
12,087
---
11/15/25
---
---
66,945
22.0
D
R
11/18/25 - 7:04:11 pm
28
    
 
YORK CHARLES N II
COO,CFO
JB
---
16,875
---
11/15/25
---
---
298,777
6.0
D
R
11/18/25 - 7:02:25 pm
29
    
 
MERENDINO LAUREN
O
JB
---
10,536
---
11/15/25
---
---
54,535
23.9
D
R
11/18/25 - 7:00:31 pm
30
    
 
BENDER JEREMY
CEO,DIR
JB
---
31,694
---
11/15/25
---
---
193,059
19.6
D
R
11/18/25 - 6:59:24 pm
31
1y
23
87%
-31%
2
YORK CHARLES N II
COO,CFO
S
$27,786
4,106
---
8/18/25
---
$6.77
278,000
-1.5
D
R
8/19/25 - 7:40:12 pm
32
1y
6
83%
-27%
2
DUBOW ADAM
GC,SEC
S
$29,538
4,365
---
8/18/25
---
$6.77
54,858
-7.4
D
R
8/19/25 - 7:38:03 pm
33
    
 
BENDER JEREMY
CEO,DIR
S
$108,666
16,058
---
8/18/25
---
$6.77
161,365
-9.1
D
R
8/19/25 - 7:37:00 pm
34
    
 
MERENDINO LAUREN
O
S
$25,485
3,766
---
8/18/25
---
$6.77
41,931
-8.2
D
R
8/19/25 - 7:36:13 pm
35
    
 
YORK CHARLES N II
COO,CFO
JB
---
16,875
---
8/15/25
---
---
282,106
6.4
D
R
8/19/25 - 7:40:12 pm
36
    
 
DUBOW ADAM
GC,SEC
JB
---
12,087
---
8/15/25
---
---
59,223
25.6
D
R
8/19/25 - 7:38:03 pm
37
    
 
BENDER JEREMY
CEO,DIR
JB
---
31,686
---
8/15/25
---
---
177,423
21.7
D
R
8/19/25 - 7:37:00 pm
38
    
 
MERENDINO LAUREN
O
JB
---
10,536
---
8/15/25
---
---
45,697
30.0
D
R
8/19/25 - 7:36:13 pm
39
    
 
BENDER JEREMY
CEO,DIR
JS
---
601,259
---
7/10/25
---
---
14,450
-97.7
I
---
7/14/25 - 4:18:48 pm
40
    
 
BENDER JEREMY
CEO,DIR
JB
---
601,259
7/2/24
7/10/25
---
---
1,408,285
74.5
I
---
7/14/25 - 4:18:48 pm
41
    
 
VASCONCELLES MICHAEL
O
3
---
---
---
6/16/25
---
---
---
---
---
---
6/18/25 - 7:41:26 pm
42
    
 
MERENDINO LAUREN
O
S
$24,575
3,927
---
5/16/25
---
$6.26
35,161
-10.0
D
R
5/19/25 - 5:54:37 pm
43
1y
6
83%
-27%
2
DUBOW ADAM
GC
S
$28,486
4,552
---
5/16/25
---
$6.26
47,136
-8.8
D
R
5/19/25 - 5:48:04 pm
44
1y
23
87%
-31%
2
YORK CHARLES N II
COO,CFO,SEC
S
$26,796
4,282
---
5/16/25
---
$6.26
265,231
-1.6
D
R
5/19/25 - 5:45:58 pm
45
    
 
BENDER JEREMY
CEO,DIR
S
$87,385
13,964
---
5/16/25
---
$6.26
145,737
-8.7
D
R
5/19/25 - 5:44:25 pm
46
    
 
MERENDINO LAUREN
O
JB
---
10,536
---
5/15/25
---
---
39,088
36.9
D
R
5/19/25 - 5:54:37 pm
47
    
 
DUBOW ADAM
GC
JB
---
12,086
---
5/15/25
---
---
51,688
30.5
D
R
5/19/25 - 5:48:04 pm
48
    
 
YORK CHARLES N II
COO,CFO,SEC
JB
---
16,875
---
5/15/25
---
---
269,513
6.7
D
R
5/19/25 - 5:45:58 pm
49
    
 
BENDER JEREMY
CEO,DIR
JB
---
31,686
---
5/15/25
---
---
159,701
24.8
D
R
5/19/25 - 5:44:25 pm
50
    
 
MERENDINO LAUREN
O
3
---
---
---
2/26/25
---
---
28,552
---
D
R
2/28/25 - 7:50:59 pm
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