John Thomas Burns - 03 Dec 2025 Form 4 Insider Report for SELLAS Life Sciences Group, Inc. (SLS)

Role
CFO
Signature
/s/ Kostantinos Skordalos, Power of Attorney For: John Thomas Burns
Issuer symbol
SLS
Transactions as of
03 Dec 2025
Transactions value $
-$87,888
Form type
4
Filing time
05 Dec 2025, 16:05:39 UTC
Previous filing
14 Jan 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Burns John Thomas CFO C/O SELLAS LIFE SCIENCES GROUP, INC.,, 7 TIMES SQUARE, SUITE 2503, NEW YORK /s/ Kostantinos Skordalos, Power of Attorney For: John Thomas Burns 05 Dec 2025 0001568734

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction SLS Common Stock Other -$87.9K -58.6K -18.72% $1.50 254K 03 Dec 2025 Direct F1, F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Transaction relates to shares of common stock withheld by the SELLAS Life Sciences Group, Inc. (the "Issuer") to cover tax withholding obligations of the Reporting Person in connection with the vesting of Restricted Stock Units ("RSUs").
F2 Represents the number shares of common stock withheld by the Issuer to cover tax withholding obligations of the Reporting Person in connection with the vesting of RSUs.