BASTA STEVEN L

PrivateCIK: 1417397
Location

SAN MATEO, CA

BASTA STEVEN L (President and CEO) exercised options at PHATHOM PHARMACEUTICALS, INC.

Option exercise — a mechanical event triggered by vesting or expiry. Not a discretionary conviction trade.

M · 1 exercise
InsiderBASTA STEVEN LCIK 1417397
DirectorOfficer· President and CEO
Since Feb 2026
-48.38K
Net shares
Net seller
$755.6K
Total sold
0
Open market trades
0B · 0S
3
Total transactions
90K acquired · 138.38K disposed
Non-Derivative Transactions2

Common Stock

Direct
M · Option Exercise

Shares

+90K

Price / share

Trade value

% of position

216.2%
11/28/2025
41.63K131.63K

Common Stock

Direct
F · Tax Withholding

Shares

48.38K

Price / share

$15.62

Trade value

$755.62K

% of position

36.8%
11/28/2025
131.63K83.25K
Total

Net shares

+41.63K

Net value

-$755.62K

Derivative Transactions1

Performance Shares

Direct
M · Option Exercise
Converts to

Common Stock

90K shares

Shares

90K

Strike price

0

Held after

180K

Exercisable

11/28/2025
BASTA STEVEN L — Insider Transaction (Form 4) Filed Dec 2, 2025 | Finecho