Leon O Moulder Jr. - 02 Feb 2026 Form 4 Insider Report for Zenas BioPharma, Inc. (ZBIO)

Role
Chief Executive Officer, Director
Signature
By: /s/ Chase Jayasekera, Attorney-in-Fact
Issuer symbol
ZBIO
Transactions as of
02 Feb 2026
Net transactions value
+$1,023,720
Form type
4
Filing time
03 Feb 2026, 16:30:13 UTC
Previous filing
09 Jan 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
MOULDER LEON O JR Chief Executive Officer, Director C/O ZENAS BIOPHARMA, INC., 852 WINTER STREET, SUITE 250, WALTHAM By: /s/ Chase Jayasekera, Attorney-in-Fact 03 Feb 2026 0001228865

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ZBIO Common Stock Purchase $1,023,720 +57,000 +16% $17.96 423,155 02 Feb 2026 Direct F1
holding ZBIO Common Stock 36,928 02 Feb 2026 See Footnote F2
holding ZBIO Common Stock 1,672,039 02 Feb 2026 See Footnote F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The price reported is a weighted average price. These shares were purchased in multiple transactions ranging from $17.69 to $18.14, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range.
F2 The reporting person is a Trustee of the Leon O. Moulder, Jr. Revocable Trust U/A dtd 9/9/2008 (the "Trust") and may be deemed to have voting and dispositive power over the shares held by the Trust. The reporting person is the Issuer's chief executive officer and Chairman of its board of directors. The reporting person disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.
F3 Leon O. Moulder, Jr. is the Managing Member of Tellus BioVentures LLC ("Tellus") and may be deemed to have sole voting and dispositive power over the shares held by Tellus. Mr. Moulder is the Issuer's chief executive officer and Chairman of its board of directors. Mr. Moulder disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.