So here's my math:
9/30/2018 share count was 1,642,269 A share equivalents [2,463,403,858 B share equivalents] - from page 23 of the Q3 10Q
10/25/2018 share count was 1,641,681 A share equivalents [2,462,520,906 B share equivalents] - from front cover of Q3 10Q
So subsequent to quarter-end, they resumed repurchases and it was about $181 million worth of stock through 10/25. Which means they didn't stop in August because of a black-out period - they stopped because they have a ceiling price on their purchase plan.
* [sorry, should have included the difference, about 588 A share equivalents repurchased in Q4 up to 10/25, or 882,900 B shares eq.]