X0306 4 2021-08-09 0 0001043000 CAPITAL SENIOR LIVING CORP CSU 0001804502 Ortelius Advisors, L.P. 450 PARK AVENUE, SUITE 2700 NEW YORK NY 10022 0 0 1 0 0001645708 Pangaea Ventures, L.P. C/O ORTELIUS ADVISORS, L.P. 450 PARK AVENUE, SUITE 2700 NEW YORK NY 10022 0 0 1 0 0001804470 DeSorcy Peter 450 PARK AVENUE, SUITE 2700 NEW YORK NY 10022 0 0 1 0 Common Stock 2021-08-09 4 P 0 37420 26.06 A 255732 I See footnotes Common Stock 2021-08-10 4 P 0 21691 23.11 A 277423 I See footnotes The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $25.85 to $26.49, inclusive. The reporting person undertakes to provide upon request to the issuer, the Securities and Exchange Commission or any security holder of the issuer full information regarding the number of shares purchased at each separate price within the range set forth in this footnote (1). The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $21.80 to $24.00, inclusive. The reporting person undertakes to provide upon request to the issuer, the Securities and Exchange Commission or any security holder of the issuer full information regarding the number of shares purchased at each separate price within the range set forth in this footnote (2). These shares are beneficially owned by Pangaea Ventures, L.P. ("Pangaea"). Ortelius Advisors, L.P. (the "Adviser") is the investment manager of Pangaea. Peter DeSorcy is the sole member of the general partner of the Adviser, and Mr. DeSorcy has a controlling interest in the Adviser. The Adviser and Mr. DeSorcy disclaim beneficial ownership of any of the shares of common stock owned by Pangaea, except to the extent of their pecuniary interest therein. ORTELIUS ADVISORS, L.P. By: Ortelius Management, LLC, its general partner By: /s/ Peter DeSorcy Name: Peter DeSorcy Title: Managing Member 2021-08-11 PANGAEA VENTURES, L.P. By: Ortelius Advisors GP I, LLC, its general partner By: /s/ Peter DeSorcy Name: Peter DeSorcy Title: Managing Member 2021-08-11 /s/ Peter DeSorcy 2021-08-11