| CUSIP No. 14081R 103 | 13G | Page 22 of 24 |
Exhibit 1
JOINT FILING AGREEMENT PURSUANT TO RULE13d-1(k)(1)
Pursuant to Rule13d-1(k)(1) under the Securities Exchange Act of 1934, the undersigned hereby agree that only one statement containing the information required by Schedule 13G need be filed with respect to the ownership by each of the undersigned of shares of Common Stock of Carbon Black, Inc.
| February 14, 2019 | ||||
| Date | ||||
| Highland Capital Partners VI Limited Partnership | ||||
| By: | Highland Management Partners VI Limited Partnership, its General Partner | |||
| By: | Highland Management Partners VI, Inc., its General Partner | |||
| By: | /s/ Jessica Healey | |||
| Authorized Manager | ||||
| Highland Capital PartnersVI-B Limited Partnership | ||||
| By: | Highland Management Partners VI Limited Partnership, its General Partner | |||
| By: | Highland Management Partners VI, Inc., its General Partner | |||
| By: | /s/ Jessica Healey | |||
| Authorized Manager | ||||
| Highland Entrepreneurs’ Fund VI Limited Partnership | ||||
| By: | HEF VI Limited Partnership, its General Partner | |||
| By: | Highland Management Partners VI, Inc., its General Partner | |||
| By: | /s/ Jessica Healey | |||
| Authorized Manager | ||||
| Highland Capital Partners VII Limited Partnership | ||||
| By: | Highland Management Partners VII Limited Partnership, its General Partner | |||
| By: | Highland Management Partners VII, LLC, its General Partner | |||
| By: | /s/ Jessica Healey | |||
| Authorized Manager | ||||
| CUSIP No. 14081R 103 | 13G | Page 2 3 of 24 |
| Highland Capital Partners VII-B Limited Partnership | ||||
| By: | Highland Management Partners VII Limited Partnership, its General Partner | |||
| By: | Highland Management Partners VII, LLC, its General Partner | |||
| By: | /s/ Jessica Healey | |||
| Authorized Manager | ||||
| Highland Capital Partners VII-C Limited Partnership | ||||
| By: | Highland Management Partners VII Limited Partnership, its General Partner | |||
| By: | Highland Management Partners VII, LLC, its General Partner | |||
| By: | /s/ Jessica Healey | |||
| Authorized Manager | ||||
| Highland Entrepreneurs’ Fund VII Limited Partnership | ||||
| By: | HEF VII Limited Partnership, its General Partner | |||
| By: | Highland Management Partners VII, LLC, its General Partner | |||
| By: | /s/ Jessica Healey | |||
| Authorized Manager | ||||
| Highland Management Partners VI, Limited Partnership | ||||
| By: | Highland Management Partners VI, Inc., its General Partner | |||
| By: | /s/ Jessica Healey | |||
| Authorized Manager | ||||
| Highland Management Partners VI, Inc. | ||||
| By: | /s/ Jessica Healey | |||
| Authorized Manager | ||||
| Highland Management Partners VII, Limited Partnership | ||||
| By: | Highland Management Partners VII, LLC, its General Partner | |||
| By: | /s/ Jessica Healey | |||
| Authorized Manager | ||||
| CUSIP No. 14081R 103 | 13G | Page 24 of 24 |
| Highland Management Partners VII, LLC | ||||
| By: | /s/ Jessica Healey | |||
| Authorized Manager | ||||
| HEF VI Limited Partnership | ||||
| By: | Highland Management Partners VI, Inc., its General Partner | |||
| By: | /s/ Jessica Healey | |||
| Authorized Manager | ||||
