There have been 50 recent insider transactions recorded for Day One Biopharmaceuticals, Inc. (DAWN), including 14 buys and 33 sells. Total insider buying was valued at RSU Award and total insider selling at $5.41M.
Notable insiders with recent activity include York Charles N Ii, Vasconcelles Michael, Dubow Adam. Insider transactions can provide insights into how company leadership views the stock's valuation and future prospects.
Insider Transactions — DAWN
| Date |
Name |
Role |
Transaction |
Shares |
Avg. Price |
Value |
Shares Owned |
| 2026-02-17 |
York Charles N Ii |
COO and CFO |
Informative Sell |
6,065 |
$11.60 |
$70.36K |
312,025 |
| 2026-02-17 |
Vasconcelles Michael |
Head of Research and Dev. |
Informative Sell |
2,728 |
$11.60 |
$31.65K |
4,397 |
| 2026-02-17 |
Dubow Adam |
Gen Counsel & Secretary |
Informative Sell |
6,395 |
$11.60 |
$74.19K |
72,694 |
| 2026-02-17 |
Merendino Lauren |
Chief Commercial Officer |
Informative Sell |
5,814 |
$11.60 |
$67.45K |
60,157 |
| 2026-02-17 |
Bender Jeremy |
Chief Executive Officer |
Informative Sell |
15,459 |
$11.60 |
$179.34K |
204,603 |
| 2026-02-15 |
York Charles N Ii |
COO and CFO |
Option Exercise (Sell) |
2,250 |
- |
- |
6,750 |
| 2026-02-15 |
Vasconcelles Michael |
Head of Research and Dev. |
Option Exercise |
7,125 |
- |
- |
7,125 |
| 2026-02-15 |
Dubow Adam |
Gen Counsel & Secretary |
Option Exercise (Sell) |
1,750 |
- |
- |
5,250 |
| 2026-02-15 |
Merendino Lauren |
Chief Commercial Officer |
Option Exercise (Sell) |
3,162 |
- |
- |
18,978 |
| 2026-02-15 |
Bender Jeremy |
Chief Executive Officer |
Option Exercise (Sell) |
4,750 |
- |
- |
14,250 |
| 2026-01-30 |
York Charles N Ii |
COO and CFO |
RSU Award |
126,000 |
- |
- |
126,000 |
| 2026-01-30 |
Vasconcelles Michael |
Head of Research and Dev. |
RSU Award |
114,000 |
- |
- |
114,000 |
| 2026-01-30 |
Dubow Adam |
Gen Counsel & Secretary |
RSU Award |
70,000 |
- |
- |
70,000 |
| 2026-01-30 |
Merendino Lauren |
Chief Commercial Officer |
RSU Award |
74,000 |
- |
- |
74,000 |
| 2026-01-30 |
Bender Jeremy |
Chief Executive Officer |
RSU Award |
237,000 |
- |
- |
237,000 |
| 2025-11-25 |
Bender Jeremy |
Chief Executive Officer |
Gift (Given) |
7,225 |
- |
- |
- |
| 2025-11-17 |
York Charles N Ii |
COO and CFO |
Informative Sell |
4,062 |
$8.91 |
$36.21K |
294,715 |
| 2025-11-17 |
Dubow Adam |
Gen Counsel & Secretary |
Informative Sell |
4,319 |
$8.91 |
$38.5K |
62,626 |
| 2025-11-17 |
Merendino Lauren |
Chief Commercial Officer |
Informative Sell |
3,726 |
$8.91 |
$33.22K |
50,809 |
| 2025-11-17 |
Bender Jeremy |
Chief Executive Officer |
Informative Sell |
15,894 |
$8.91 |
$141.69K |
177,165 |
| 2025-11-15 |
York Charles N Ii |
COO and CFO |
Option Exercise (Sell) |
1,375 |
- |
- |
- |
| 2025-11-15 |
Dubow Adam |
Gen Counsel & Secretary |
Option Exercise (Sell) |
1,750 |
- |
- |
7,000 |
| 2025-11-15 |
Merendino Lauren |
Chief Commercial Officer |
Option Exercise (Sell) |
3,162 |
- |
- |
22,140 |
| 2025-11-15 |
Bender Jeremy |
Chief Executive Officer |
Option Exercise (Sell) |
3,570 |
- |
- |
- |
| 2025-11-06 |
Dable Habib J |
Director |
Return of Shares |
66,660 |
$13.81 |
$920.57K |
- |
| 2025-11-06 |
Bender Jeremy |
Chief Executive Officer |
Return of Shares |
286,000 |
$11.87 |
$3.39M |
- |
| 2025-06-16 |
Vasconcelles Michael |
Officer |
Unknown |
- |
- |
- |
- |
| 2025-06-16 |
Vasconcelles Michael |
Head of Research and Dev. |
RSU Award |
226,000 |
- |
- |
226,000 |
| 2025-06-02 |
Garland J. Scott |
Director |
RSU Award |
15,000 |
- |
- |
15,000 |
| 2025-06-02 |
Ramasastry Saira |
Director |
RSU Award |
15,000 |
- |
- |
15,000 |
| 2025-06-02 |
Holles Natalie C. |
Director |
RSU Award |
15,000 |
- |
- |
15,000 |
| 2025-06-02 |
Nicholson Garry A |
Director |
RSU Award |
15,000 |
- |
- |
15,000 |
| 2025-06-02 |
Dable Habib J |
Director |
RSU Award |
15,000 |
- |
- |
15,000 |
| 2025-06-02 |
Grossman William |
Director |
RSU Award |
15,000 |
- |
- |
15,000 |
| 2025-06-02 |
Josey John A. |
Director |
RSU Award |
15,000 |
- |
- |
15,000 |
| 2025-05-16 |
York Charles N Ii |
COO, CFO and Secretary |
Informative Sell |
4,282 |
$6.26 |
$26.8K |
265,231 |
| 2025-05-16 |
Dubow Adam |
General Counsel |
Informative Sell |
4,552 |
$6.26 |
$28.49K |
47,136 |
| 2025-05-16 |
Merendino Lauren |
Chief Commercial Officer |
Informative Sell |
3,927 |
$6.26 |
$24.57K |
35,161 |
| 2025-05-16 |
Bender Jeremy |
Chief Executive Officer |
Informative Sell |
13,964 |
$6.26 |
$87.39K |
145,737 |
| 2025-05-15 |
York Charles N Ii |
COO, CFO and Secretary |
Option Exercise (Sell) |
1,375 |
- |
- |
2,750 |
| 2025-05-15 |
Dubow Adam |
General Counsel |
Option Exercise (Sell) |
1,750 |
- |
- |
10,500 |
| 2025-05-15 |
Merendino Lauren |
Chief Commercial Officer |
Option Exercise (Sell) |
3,162 |
- |
- |
28,464 |
| 2025-05-15 |
Bender Jeremy |
Chief Executive Officer |
Option Exercise (Sell) |
3,562 |
- |
- |
7,132 |
| 2025-02-26 |
Merendino Lauren |
Chief Commercial Officer |
Unknown |
55,313 |
- |
- |
- |
| 2025-02-18 |
York Charles N Ii |
COO, CFO and Secretary |
Informative Sell |
4,370 |
$11.96 |
$52.28K |
252,638 |
| 2025-02-18 |
Dubow Adam |
General Counsel |
Informative Sell |
4,646 |
$11.96 |
$55.58K |
39,602 |
| 2025-02-18 |
Bender Jeremy |
Chief Executive Officer |
Informative Sell |
12,048 |
$11.96 |
$144.13K |
128,015 |
| 2025-02-15 |
York Charles N Ii |
COO, CFO and Secretary |
Option Exercise (Sell) |
1,375 |
- |
- |
4,125 |
| 2025-02-15 |
Dubow Adam |
General Counsel |
Option Exercise (Sell) |
1,750 |
- |
- |
12,250 |
| 2025-02-15 |
Bender Jeremy |
Chief Executive Officer |
Option Exercise (Sell) |
3,562 |
- |
- |
10,694 |
■ Informative Buy/Sell — open market transaction (most significant)
■ Uninformative Buy — award, option exercise, conversion
■ Uninformative Sell — tax withholding, award vest sale
■ Neutral — gift, trust, expiry
