X0508 4 2024-03-04 0000909494 TUCOWS INC /PA/ TCX 0001244261 NOSS ELLIOT 96 MOWAT AVENUE TORONTO A6 M6K 3M1 ONTARIO, CANADA 1 1 Chief Executive Officer 1 Common Stock 114670 I Per EN RRSP Common Stock 1639 I Per EN TFSA Common Stock 6000 I Per EN US Retirement Savings Account Common Stock 2470 I By spouse Common Stock 2024-03-04 4 S 0 3100 18.38 D 532533 D Common Stock 2024-03-04 4 S 0 2500 18.02 D 530033 D Common Stock 2024-03-05 4 S 0 7900 18.04 D 522133 D Common Stock 2024-03-06 4 S 0 200 18.13 D 521933 D The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 15, 2023, at least ninety days prior to the trading date. These shares were sold in multiple transactions at prices ranging from $18.14 to $19.11 inclusive. The reporting person will provide to the Commission, the Issuer, and any stockholder, upon request, full information regarding the number of shares purchased or sold at each separate price. These shares were sold in multiple transactions at prices ranging from $17.95 to $18.07 inclusive. The reporting person will provide to the Commission, the Issuer, and any stockholder, upon request, full information regarding the number of shares purchased or sold at each separate price. These shares were sold in multiple transactions at prices ranging from $17.95 to $18.17 inclusive. The reporting person will provide to the Commission, the Issuer, and any stockholder, upon request, full information regarding the number of shares purchased or sold at each separate price. The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose. /s/ Elliot Noss 2024-03-06