X0306 4 2019-03-12 0 0001514416 Bandwidth Inc. BAND 0001721985 Murdock John C. C/O BANDWIDTH INC. 900 MAIN CAMPUS DRIVE, SUITE 500 RALEIGH NC 27606 1 0 0 0 Class A Common Stock 2019-03-12 4 C 0 34505 0.00 A 55860 D Class A Common Stock 2019-03-13 4 S 0 12390 65.937 D 43470 D Class A Common Stock 2019-03-13 4 S 0 900 66.9133 D 42570 D Stock Option (right to buy) 5.80 2019-03-12 4 X 0 34505 D 2020-11-10 Class B Common Stock 34505 0 D Class B Common Stock 2019-03-12 4 X 0 34505 0.00 A Class A Common Stock 34505 126887 D Class B Common Stock 2019-03-12 4 C 0 34505 0.00 D Class A Common Stock 34505 92382 D Class B Common Stock Class A Common Stock 52409 52409 I By John C. Murdock Family Line Trust In accordance with the terms of the lock-up letter agreement (the "Lock-Up Agreement") executed by the reporting person on March 11, 2019, certain of the Class A shares acquired in connection with the exercise of the option disclosed herein remain subject to transfer restrictions as described in the Lock-Up Agreement. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $65.42 to $66.33. The reporting person undertakes to provide Bandwidth Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $66.70 to $67.12. The reporting person undertakes to provide the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The stock option is currently exercisable. The reporting person acquired the option to purchase 34,505 shares of Class B common stock from David Morken as partial consideration for the reporting person's entry into a commercial agreement with Mr. Morken. The shares of Class B common stock are convertible in to Class A common stock on a 1-to-1 basis at the option of the holder and have no expiration date. /s/ W. Christopher Matton, Attorney-in-Fact for John C. Murdock 2019-03-14