0001104659-26-051889.txt : 20260429 0001104659-26-051889.hdr.sgml : 20260429 20260429192102 ACCESSION NUMBER: 0001104659-26-051889 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20260428 FILED AS OF DATE: 20260429 DATE AS OF CHANGE: 20260429 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: MOULDER LEON O JR CENTRAL INDEX KEY: 0001228865 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-42270 FILM NUMBER: 26919100 MAIL ADDRESS: STREET 1: C/O TESARO, INC. STREET 2: 1000 WINTER STREET, SUITE 3300 CITY: WALTHAM STATE: MA ZIP: 02451 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Zenas BioPharma, Inc. CENTRAL INDEX KEY: 0001953926 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] ORGANIZATION NAME: 03 Life Sciences EIN: 000000000 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 852 WINTER STREET, SUITE 250 CITY: WALTHAM STATE: MA ZIP: 02451 BUSINESS PHONE: 857-271-2954 MAIL ADDRESS: STREET 1: 852 WINTER STREET, SUITE 250 CITY: WALTHAM STATE: MA ZIP: 02451 FORMER COMPANY: FORMER CONFORMED NAME: Zenas BioPharma (Cayman) Ltd DATE OF NAME CHANGE: 20221108 4 1 tm2613154-1_4seq1.xml OWNERSHIP DOCUMENT X0609 4 2026-04-28 0 0001953926 Zenas BioPharma, Inc. ZBIO 0001228865 MOULDER LEON O JR false C/O ZENAS BIOPHARMA, INC. 852 WINTER STREET, SUITE 250 WALTHAM MA 02451 1 1 0 0 Chief Executive Officer 0 Common Stock 2026-04-28 4 P 0 25000 18.02 A 1751039 I See Footnote Common Stock 2026-04-29 4 P 0 35000 17.62 A 1786039 I See Footnote Common Stock 36928 I See Footnote Common Stock 423155 D The price reported is a weighted average price. These shares were purchased in multiple transactions ranging from $17.87 to $18.05, 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. 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. The price reported is a weighted average price. These shares were purchased in multiple transactions ranging from $17.56 to $17.67, 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. 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. By: /s/ Chase Jayasekera, Attorney-in-Fact 2026-04-29