VASCONCELLES MICHAEL (Head of Research and Dev.) sold 38.3% of their position (2.73K shares) of DAY ONE BIOPHARMACEUTICALS, INC. on the open market
Open‑market sale worth $31.6K — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.
S · 1 sale
Filed: 2/18/2026ACC: 0001734755-26-000004
Officer· Head of Research and Dev.
Since Feb 2026
-2.73K
Net shares
Net seller
$31.6K
Total sold
1
Open market trades
0B · 1S
3
Total transactions
7.13K acquired · 9.85K disposed
Non-Derivative Transactions2
Common Stock
Direct
Shares
+7.13K
Price / share
—
Trade value
—
% of position
New position
2/15/2026
0.00→7.13K
Common Stock
Direct
Shares
−2.73K
Price / share
$11.60
Trade value
$31.65K
% of position
38.3%
2/17/2026
7.13K→4.40K
Total
Net shares
+4.40K
Net value
-$31.65K
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common Stock Direct | 2/15/2026 | M · Option Exercise | +7.13K | — | — | New position | 0.00 | 7.13K |
| Common Stock Direct | 2/17/2026 | S · Sale | −2.73K | $11.60 | $31.65K | 38.3% | 7.13K | 4.40K |
| Total | +4.40K | -$31.65K | ||||||
Derivative Transactions1
Restricted Stock Unit (RSU)
Direct
Converts to
Common Stock
7.13K shares
Shares
−7.13K
Strike price
Held after
106.88K
Exercisable
—
2/15/2026
| Security | Converts To | Date | Type | Shares | Strike Price | Exercisable | Held After |
|---|---|---|---|---|---|---|---|
| Restricted Stock Unit (RSU) Direct | Common Stock7.13K shares | 2/15/2026 | M · Option Exercise | −7.13K | — | 106.88K |