Barbara Klencke - 25 Feb 2026 Form 3 Insider Report for ALX ONCOLOGY HOLDINGS INC (ALXO)

Role
Chief Medical Officer
Signature
/s/ Shelly Pinto, by power of attorney
Issuer symbol
ALXO
Transactions as of
25 Feb 2026
Net transactions value
$0
Form type
3
Filing time
05 Mar 2026, 16:01:03 UTC
Previous filing
19 Sep 2025
Next filing
05 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Klencke Barbara Chief Medical Officer C/O ALX ONCOLOGY HOLDINGS INC., 323 ALLERTON AVENUE, SOUTH SAN FRANCISCO /s/ Shelly Pinto, by power of attorney 05 Mar 2026 0001647647

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
holding ALXO Common Stock 60,000 25 Feb 2026 Direct
holding ALXO Common Stock 60,000 25 Feb 2026 See footnote F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
holding ALXO Stock option (right to buy) 25 Feb 2026 Common Stock 40,400 $1.65 Direct F2
holding ALXO Stock option (right to buy) 25 Feb 2026 Common Stock 300,000 $1.05 Direct F3
holding ALXO Stock option (right to buy) 25 Feb 2026 Common Stock 100,000 $1.48 Direct F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The shares are held directly by the reporting person's spouse.
F2 Shares subject to the option vest in 36 equal monthly installments beginning on February 21, 2025.
F3 One-third of the shares subject to the option vest on each of September 17, 2025, January 31, 2026 and June 30, 2026.
F4 Shares subject to the option vest in 12 equal monthly installments beginning on February 26, 2026.

Remarks:

Exhibit 24.1 - Power of Attorney