Boundless Bio, Inc.

BOLD·NASDAQ·$1.47Share Price as of 11/2·$33MMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/07/26 10-QQ1 ended 03/31/2605/08/26 10-KFY 202503/09/26 10-QQ3 ended 09/30/2511/05/25 10-QQ2 ended 06/30/2508/05/25

Disclosures

8-KCurrent report08/28/26 8-KCurrent report06/23/26 8-KCurrent report06/17/26 8-KCurrent report05/08/26 8-KCurrent report04/13/26

Prospectuses and Registrations

S-4Registration (business combination)10/08/26 S-3Shelf registration04/01/25 424B4Prospectus03/28/24 S-8Registration of securities for employees03/28/24 S-1/ARegistration statement (amended)03/21/24

Proxies

DEF 14ADefinitive proxy04/28/26 DEFA14AAdditional proxy materials04/28/26 DEF 14ADefinitive proxy04/29/25 DEFA14AAdditional proxy materials04/29/25

Ownership

Form 4Insider transaction10/29/26 Form 4Insider transaction10/26/26 Form 4Insider transaction10/20/26 Form 4Insider transaction08/28/26 SC 13GBeneficial ownership08/27/26

Other

42542510/26/26 42542510/26/26 DRSDRS08/31/26 42542508/28/26 42542506/23/26