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Insider Trading Arrangements
 3 Months Ended
Sep. 30, 2025
Trading Arrangements, by Individual  
Material Terms of Trading Arrangement
During the quarter ended September 30, 2025, there were no Rule 10b5‑1 trading arrangements (as defined in Item 408(a) of Regulation S‑K) or non‑Rule 10b5‑1 trading arrangements (as defined in Item 408(c) of Regulation S‑K) adopted or terminated by any director or officer (as defined in Rule 16a‑1(f) under the Exchange Act) of Credit Acceptance Corporation, except for the following Rule 10b5-1 trading arrangements, each of which is intended to satisfy the affirmative defense of Rule 10b5‑1(c), that were adopted during such quarter:

Name and Title of Director or OfficerDate of Adoption of Trading ArrangementAggregate Number of Securities to be Sold Pursuant to the Trading ArrangementExpiration Date of the Trading Arrangement (1)
Kenneth S. Booth
Chief Executive Officer and President; Director
8/15/2025Up to 20,000 shares of common stock underlying employee stock options11/2/2026
Nicholas J. Elliott
Chief Alignment Officer
8/21/2025Up to 13,950 shares of common stock underlying employee stock options12/30/2026
Erin J. Kerber
Chief Legal Officer
8/18/2025Up to 24,625 shares of common stock underlying employee stock options6/28/2027
Jonathan L. Lum
Chief Operating Officer
9/4/2025Up to 18,000 shares of common stock underlying employee stock options10/30/2026
Jay D. Martin
Chief Financial Officer
8/13/2025Up to 12,000 shares of common stock underlying employee stock options11/2/2026
Ravi Mohan
Chief Technology Officer
9/24/2025Up to 3,147 shares of common stock underlying employee restricted stock units (2)9/22/2026
Andrew K. Rostami
Chief Marketing and Product Officer
8/26/2025Up to 1,606 shares of common stock underlying employee restricted stock units (2)12/30/2025
Wendy A. Rummler
Chief People Officer
8/13/2025Up to 17,500 shares of common stock underlying employee stock options11/2/2026
Daniel A. Ulatowski
Chief Sales Officer
8/8/2025Up to 20,000 shares of common stock underlying employee stock options8/4/2026

(1)    The trading arrangement permits transactions through and including the earlier of (i) the expiration date indicated and (ii) the date when all shares subject to the trading arrangement have been sold.
(2)    The aggregate number of shares to be sold will be reduced by the number of shares released to us as payment of tax withholdings upon the vesting of restricted stock units and the settlement of restricted stock units in shares of common stock.
Non-Rule 10b5-1 Arrangement Adopted false
Rule 10b5-1 Arrangement Terminated false
Non-Rule 10b5-1 Arrangement Terminated false
Erin J. Kerber [Member]  
Trading Arrangements, by Individual  
Name Erin J. Kerber
Title Chief Legal Officer
Rule 10b5-1 Arrangement Adopted true
Adoption Date 8/18/2025
Expiration Date 6/28/2027
Wendy A. Rummler [Member]  
Trading Arrangements, by Individual  
Name Wendy A. Rummler
Title Chief People Officer
Rule 10b5-1 Arrangement Adopted true
Adoption Date 8/13/2025
Expiration Date 11/2/2026
Kenneth S. Booth [Member]  
Trading Arrangements, by Individual  
Name Kenneth S. Booth
Title Chief Executive Officer and President; Director
Rule 10b5-1 Arrangement Adopted true
Adoption Date 8/15/2025
Expiration Date 11/2/2026
Ravi Mohan [Member]  
Trading Arrangements, by Individual  
Name Ravi Mohan
Title Chief Technology Officer
Rule 10b5-1 Arrangement Adopted true
Adoption Date 9/24/2025
Expiration Date 9/22/2026
Andrew K. Rostami [Member]  
Trading Arrangements, by Individual  
Name Andrew K. Rostami
Title Chief Marketing and Product Officer
Rule 10b5-1 Arrangement Adopted true
Adoption Date 8/26/2025
Expiration Date 12/30/2025
Daniel A. Ulatowski [Member]  
Trading Arrangements, by Individual  
Name Daniel A. Ulatowski
Title Chief Sales Officer
Rule 10b5-1 Arrangement Adopted true
Adoption Date 8/8/2025
Expiration Date 8/4/2026
Jonathan L. Lum [Member]  
Trading Arrangements, by Individual  
Name Jonathan L. Lum
Title Chief Operating Officer
Rule 10b5-1 Arrangement Adopted true
Adoption Date 9/4/2025
Expiration Date 10/30/2026
Nicholas J. Elliott [Member]  
Trading Arrangements, by Individual  
Name Nicholas J. Elliott
Title Chief Alignment Officer
Rule 10b5-1 Arrangement Adopted true
Adoption Date 8/21/2025
Expiration Date 12/30/2026
Jay D. Martin [Member]  
Trading Arrangements, by Individual  
Name Jay D. Martin
Title Chief Financial Officer
Rule 10b5-1 Arrangement Adopted true
Adoption Date 8/13/2025
Expiration Date 11/2/2026