Zenas Biopharma, Inc.

ZBIO·NASDAQ·$18.73Share Price as of 11/2·$836MMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/13/26 10-QQ1 ended 03/31/2605/13/26 10-KFY 202503/16/26 10-QQ3 ended 09/30/2511/12/25 10-QQ2 ended 06/30/2508/12/25

Disclosures

8-KCurrent report10/13/26 8-KCurrent report08/13/26 8-KCurrent report05/13/26 8-KCurrent report03/31/26 8-KCurrent report03/16/26

Prospectuses and Registrations

S-3ASRAutomatic shelf registration09/11/26 S-8Registration of securities for employees09/11/26 424B5Prospectus supplement03/30/26 424B5Prospectus supplement03/30/26 FWPFree writing prospectus03/27/26

Proxies

DEF 14ADefinitive proxy03/16/26 DEFA14AAdditional proxy materials03/16/26 DEF 14ADefinitive proxy04/28/25 DEFA14AAdditional proxy materials04/28/25

Ownership

Form 3Initial insider ownership09/08/26 SC 13GBeneficial ownership09/08/26 SC 13G/ABeneficial ownership (amended)09/08/26 Form 3Initial insider ownership09/02/26 Form 4Insider transaction09/02/26

Other

ARSAnnual report to shareholders03/16/26 ARSAnnual report to shareholders04/28/25 CERTCEO/CFO certification09/12/24 EFFECTRequest for effectiveness09/12/24 SEC STAFF LETTERSEC staff letter09/12/24