BAND

SEC source: 0001721962-25-000007 · wk-form4_1764712460.xml · derivative · entry 7

Morken David A. · CIK 0001721962 · Director · Chairman & CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 32,823

Underlying: Class A Common Stock · 16,411 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of the Company's Class A Common Stock.

F6 · derivative.exercise_date: On November 28, 2024, the Reporting Person was granted 49,234 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares will vest in eight equal quarterly installments beginning on February 28, 2026.

F6 · derivative.expiration_date: On November 28, 2024, the Reporting Person was granted 49,234 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares will vest in eight equal quarterly installments beginning on February 28, 2026.

SEC source: 0001721962-25-000007 · wk-form4_1764712460.xml · derivative · entry 6

Morken David A. · CIK 0001721962 · Director · Chairman & CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 30,908

Underlying: Class A Common Stock · 7,727 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of the Company's Class A Common Stock.

F5 · derivative.exercise_date: On November 28, 2023, the Reporting Person was granted 92,725 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on February 28, 2025.

F5 · derivative.expiration_date: On November 28, 2023, the Reporting Person was granted 92,725 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on February 28, 2025.

SEC source: 0001721962-25-000007 · wk-form4_1764712460.xml · derivative · entry 5

Morken David A. · CIK 0001721962 · Director · Chairman & CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 4,236 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of the Company's Class A Common Stock.

F4 · derivative.exercise_date: On November 28, 2022, the Reporting Person was granted 50,834 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vested in eight equal quarterly installments beginning on February 28, 2024.

F4 · derivative.expiration_date: On November 28, 2022, the Reporting Person was granted 50,834 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vested in eight equal quarterly installments beginning on February 28, 2024.

SEC source: 0001721962-25-000007 · wk-form4_1764712460.xml · nonDerivative · entry 3

Morken David A. · CIK 0001721962 · Director · Chairman & CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,078

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001721962-25-000007 · wk-form4_1764712460.xml · nonDerivative · entry 2

Morken David A. · CIK 0001721962 · Director · Chairman & CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 25,667

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001721962-25-000007 · wk-form4_1764712460.xml · nonDerivative · entry 1

Morken David A. · CIK 0001721962 · Director · Chairman & CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 17,940

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001527937-25-000005 · wk-form4_1764712423.xml · derivative · entry 3

Suriano Douglas A · CIK 0001527937 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,333

Underlying: Class A Common Stock · 13,333 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Bandwidth Inc. Class A Common Stock.

F3 · derivative.exercise_date: On November 28, 2025, the Reporting Person was granted 13,333 Restricted Stock Units, which vest in four equal quarterly installments beginning on February 28, 2026.

F3 · derivative.expiration_date: On November 28, 2025, the Reporting Person was granted 13,333 Restricted Stock Units, which vest in four equal quarterly installments beginning on February 28, 2026.

SEC source: 0001527937-25-000005 · wk-form4_1764712423.xml · derivative · entry 2

Suriano Douglas A · CIK 0001527937 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 2,024 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Bandwidth Inc. Class A Common Stock.

F2 · derivative.exercise_date: On November 28, 2024, the Reporting Person was granted 8,098 Restricted Stock Units, which vested in four equal quarterly installments beginning on February 28, 2025.

F2 · derivative.expiration_date: On November 28, 2024, the Reporting Person was granted 8,098 Restricted Stock Units, which vested in four equal quarterly installments beginning on February 28, 2025.

SEC source: 0001527937-25-000005 · wk-form4_1764712423.xml · nonDerivative · entry 1

Suriano Douglas A · CIK 0001527937 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,410

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001575505-25-000007 · wk-form4_1764712436.xml · derivative · entry 3

Bailey Brian D. · CIK 0001575505 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,333

Underlying: Class A Common Stock · 13,333 shares

Expires not disclosed

F4 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Bandwidth Inc. Class A Common Stock.

F6 · derivative.exercise_date: On November 28, 2025, the Reporting Person was granted 13,333 Restricted Stock Units, which vest in four equal quarterly installments beginning on February 28, 2026.

F6 · derivative.expiration_date: On November 28, 2025, the Reporting Person was granted 13,333 Restricted Stock Units, which vest in four equal quarterly installments beginning on February 28, 2026.

SEC source: 0001575505-25-000007 · wk-form4_1764712436.xml · derivative · entry 2

Bailey Brian D. · CIK 0001575505 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 2,024 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Bandwidth Inc. Class A Common Stock.

F5 · derivative.exercise_date: On November 28, 2024, the Reporting Person was granted 8,098 Restricted Stock Units, which vested in four equal quarterly installments beginning on February 28, 2025.

F5 · derivative.expiration_date: On November 28, 2024, the Reporting Person was granted 8,098 Restricted Stock Units, which vested in four equal quarterly installments beginning on February 28, 2025.

SEC source: 0001575505-25-000007 · wk-form4_1764712436.xml · nonDerivative · entry 1

Bailey Brian D. · CIK 0001575505 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 65,422

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · ownership.nature: Carmichael Bandwidth LLC is the managing member of each of Carmichael Partners, LLC ("CP"); Carmichael Investment Partners II, LLC ("CP II"); and Carmichael Investment Partners III, LLC ("CP III"). Brian D. Bailey and Kevin J. Martin are the managing partners of Carmichael Bandwidth LLC and Carmichael Partners LLC and share voting and dispositive power with respect to the shares held by CP, CP II and CP III. The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his pecuniary interest therein.

F2 · ownership.nature: Following the transactions reported herein, consists of 8,750 shares of Class A Common Stock held by Carmichael Partners, LLC and 56,672 shares of Class A Common Stock held of record by Brian D. Bailey.

F3 · ownership.nature: Pursuant to an agreement between Mr. Bailey and Carmichael Partners LLC, Carmichael Partners LLC is entitled to all economic benefit with respect to 7,234 shares held by Mr. Bailey.

SEC source: 0001721985-25-000005 · wk-form4_1764712366.xml · derivative · entry 4

Murdock John C. · CIK 0001721985 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 13,333

Underlying: Class A Common Stock · 13,333 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Bandwidth Inc. Class A Common Stock.

F4 · derivative.exercise_date: On November 28, 2025, the Reporting Person was granted 13,333 Restricted Stock Units, which vest in four equal quarterly installments beginning on February 28, 2026.

F4 · derivative.expiration_date: On November 28, 2025, the Reporting Person was granted 13,333 Restricted Stock Units, which vest in four equal quarterly installments beginning on February 28, 2026.

SEC source: 0001721985-25-000005 · wk-form4_1764712366.xml · derivative · entry 3

Murdock John C. · CIK 0001721985 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 2,024 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Bandwidth Inc. Class A Common Stock.

F3 · derivative.exercise_date: On November 28, 2024, the Reporting Person was granted 8,098 Restricted Stock Units, which vested in four equal quarterly installments beginning on February 28, 2025.

F3 · derivative.expiration_date: On November 28, 2024, the Reporting Person was granted 8,098 Restricted Stock Units, which vested in four equal quarterly installments beginning on February 28, 2025.

SEC source: 0001721985-25-000005 · wk-form4_1764712366.xml · nonDerivative · entry 1

Murdock John C. · CIK 0001721985 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 113,371

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001575505-25-000005 · wk-form4_1764018397.xml · nonDerivative · entry 1

Bailey Brian D. · CIK 0001575505 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 63,398

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $13.525 to $13.92. 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.

F2 · ownership.nature: Carmichael Bandwidth LLC is the managing member of each of Carmichael Partners, LLC ("CP"); Carmichael Investment Partners II, LLC ("CP II"); and Carmichael Investment Partners III, LLC ("CP III"). Brian D. Bailey and Kevin J. Martin are the managing partners of Carmichael Bandwidth LLC and Carmichael Partners LLC and share voting and dispositive power with respect to the shares held by CP, CP II and CP III. The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his pecuniary interest therein.

F3 · ownership.nature: Following the transactions reported herein, consists of 8,750 shares of Class A Common Stock held by Carmichael Partners, LLC and 54,648 shares of Class A Common Stock held of record by Brian D. Bailey.

F4 · ownership.nature: Pursuant to an agreement between Mr. Bailey and Carmichael Partners LLC, Carmichael Partners LLC is entitled to all economic benefit with respect to 7,234 shares held by Mr. Bailey.

SEC source: 0001967808-25-000007 · wk-form4_1758225864.xml · nonDerivative · entry 1

Krupka Devin M · CIK 0001967808 · Controller, PAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 19,192

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on March 12, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.00 to $18.07. 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.

SEC source: 0001405026-25-000016 · wk-form4_1757707410.xml · nonDerivative · entry 1

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,895

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.25 to $16.205. 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.

SEC source: 0001405026-25-000013 · wk-form4_1757458378.xml · nonDerivative · entry 4

Raiford Daryl · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 90,395

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.40 to $15.51. 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.

SEC source: 0001405026-25-000013 · wk-form4_1757458378.xml · nonDerivative · entry 3

Raiford Daryl · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By IRA

Disclosed balance after: 0

SEC source: 0001405026-25-000013 · wk-form4_1757458378.xml · nonDerivative · entry 2

Raiford Daryl · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 104,538

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.70 to $15.72. 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.

SEC source: 0001405026-25-000013 · wk-form4_1757458378.xml · nonDerivative · entry 1

Raiford Daryl · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 109,538

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.5042 to $15.5050. 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.

SEC source: 0001405026-25-000011 · wk-form4_1757019544.xml · nonDerivative · entry 3

Raiford Daryl · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 128,538

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.17 to $15.65. 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.

SEC source: 0001405026-25-000011 · wk-form4_1757019544.xml · nonDerivative · entry 2

Raiford Daryl · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 131,132

F2 · kind: Reflects shares sold to cover taxes upon the vesting of Restricted Stock Units on August 30, 2025, pursuant to a Rule 10b5-1 instruction letter adopted by the Reporting Person on March 3, 2023 related solely to tax obligations associated with awards received in connection with the Company's equity compensation programs.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.13 to $15.32. 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.

SEC source: 0001405026-25-000011 · wk-form4_1757019544.xml · nonDerivative · entry 1

Raiford Daryl · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 135,249

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.72 to $15.28. 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.

SEC source: 0001405026-25-000009 · wk-form4_1756845419.xml · derivative · entry 8

Raiford Daryl · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 31,806

Underlying: Class A Common Stock · 10,603 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of the Company's Class A Common Stock.

F6 · derivative.exercise_date: On May 30, 2023, the Reporting Person was granted 127,226 Restricted Stock Units, one third of which vest on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on August 30, 2024.

F6 · derivative.expiration_date: On May 30, 2023, the Reporting Person was granted 127,226 Restricted Stock Units, one third of which vest on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on August 30, 2024.

SEC source: 0001405026-25-000009 · wk-form4_1756845419.xml · nonDerivative · entry 4

Raiford Daryl · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 137,399

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0002029692-25-000005 · wk-form4_1756845442.xml · nonDerivative · entry 3

Agarwal Devesh · CIK 0002029692 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 67,263

F1 · kind: Reflects shares sold to cover taxes upon the vesting of Restricted Stock Units on August 28, 2025, pursuant to a Rule 10b5-1 instruction letter adopted by the Reporting Person on March 3, 2023 related solely to tax obligations associated with awards received in connection with Bandwidth Inc. (the "Company") equity compensation programs.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.87 to $15.1947. 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.

SEC source: 0001967808-25-000003 · wk-form4_1756845649.xml · nonDerivative · entry 3

Krupka Devin M · CIK 0001967808 · Controller, PAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 26,358

F1 · kind: Reflects shares sold to cover taxes upon the vesting of Restricted Stock Units on August 28, 2025, pursuant to a Rule 10b5-1 instruction letter adopted by the Reporting Person on May 5, 2023 related solely to tax obligations associated with awards received in connection with Bandwidth Inc. (the "Company") equity compensation programs.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.87 to $15.1947. 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.

SEC source: 0001842470-25-000003 · wk-form4_1756845490.xml · nonDerivative · entry 3

Asbill Richard Brandon · CIK 0001842470 · General Counsel

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 51,617

F1 · kind: Reflects shares sold to cover taxes upon the vesting of Restricted Stock Units on August 28, 2025, pursuant to a Rule 10b5-1 instruction letter adopted by the Reporting Person on March 3, 2023 related solely to tax obligations associated with awards received in connection with Bandwidth Inc. (the "Company") equity compensation programs.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.87 to $15.1947. 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.

SEC source: 0001807759-25-000003 · wk-form4_1756845565.xml · nonDerivative · entry 4

Ross Kade · CIK 0001807759 · Chief Information Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 71,250

F1 · kind: Reflects shares sold to cover taxes upon the vesting of Restricted Stock Units on August 28, 2025, pursuant to a Rule 10b5-1 instruction letter adopted by the Reporting Person on March 3, 2023 related solely to tax obligations associated with awards received in connection with Bandwidth Inc. (the "Company") equity compensation programs.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.87 to $15.1947. 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.

SEC source: 0001804735-25-000007 · wk-form4_1756845534.xml · nonDerivative · entry 4

Bottorff Rebecca · CIK 0001804735 · Director · Chief People Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,706

F1 · kind: Reflects shares sold to cover taxes upon the vesting of Restricted Stock Units on August 28, 2025, pursuant to a Rule 10b5-1 instruction letter adopted by the Reporting Person on March 7, 2023 related solely to tax obligations associated with awards received in connection with Bandwidth Inc. (the "Company") equity compensation programs.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.87 to $15.1947. 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.

SEC source: 0001405026-25-000009 · wk-form4_1756845419.xml · nonDerivative · entry 3

Raiford Daryl · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 126,796

F1 · kind: Reflects shares sold to cover taxes upon the vesting of Restricted Stock Units on August 28, 2025, pursuant to a Rule 10b5-1 instruction letter adopted by the Reporting Person on March 3, 2023 related solely to tax obligations associated with awards received in connection with Bandwidth Inc. (the "Company") equity compensation programs.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.87 to $15.1947. 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.

SEC source: 0001721962-25-000003 · wk-form4_1756845291.xml · nonDerivative · entry 3

Morken David A. · CIK 0001721962 · Director · Chairman & CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 13,704

F1 · kind: Reflects shares sold to cover taxes upon the vesting of Restricted Stock Units on August 28, 2025, pursuant to a Rule 10b5-1 instruction letter adopted by the Reporting Person on March 3, 2023 related solely to tax obligations associated with awards received in connection with Bandwidth Inc. (the "Company") equity compensation programs.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.87 to $15.1947. 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.

SEC source: 0001721985-25-000003 · wk-form4_1756844988.xml · nonDerivative · entry 2

Murdock John C. · CIK 0001721985 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 111,347

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.93 to $15.20. 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.

SEC source: 0002029692-25-000005 · wk-form4_1756845442.xml · derivative · entry 5

Agarwal Devesh · CIK 0002029692 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 19,636

Underlying: Class A Common Stock · 3,928 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of the Company's Class A Common Stock.

F5 · derivative.exercise_date: On November 28, 2023, the Reporting Person was granted 47,127 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on February 28, 2025.

F5 · derivative.expiration_date: On November 28, 2023, the Reporting Person was granted 47,127 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on February 28, 2025.

SEC source: 0002029692-25-000005 · wk-form4_1756845442.xml · derivative · entry 4

Agarwal Devesh · CIK 0002029692 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,153

Underlying: Class A Common Stock · 2,153 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of the Company's Class A Common Stock.

F4 · derivative.exercise_date: On November 28, 2022, the Reporting Person was granted 25,837 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on February 28, 2024.

F4 · derivative.expiration_date: On November 28, 2022, the Reporting Person was granted 25,837 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on February 28, 2024.

SEC source: 0002029692-25-000005 · wk-form4_1756845442.xml · nonDerivative · entry 2

Agarwal Devesh · CIK 0002029692 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 69,008

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0002029692-25-000005 · wk-form4_1756845442.xml · nonDerivative · entry 1

Agarwal Devesh · CIK 0002029692 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 65,080

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001967808-25-000003 · wk-form4_1756845649.xml · derivative · entry 5

Krupka Devin M · CIK 0001967808 · Controller, PAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 13,876

Underlying: Class A Common Stock · 2,776 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of the Company's Class A Common Stock.

F5 · derivative.exercise_date: On November 28, 2023, the Reporting Person was granted 33,303 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on February 28, 2025.

F5 · derivative.expiration_date: On November 28, 2023, the Reporting Person was granted 33,303 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on February 28, 2025.

SEC source: 0001967808-25-000003 · wk-form4_1756845649.xml · derivative · entry 4

Krupka Devin M · CIK 0001967808 · Controller, PAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,369

Underlying: Class A Common Stock · 1,370 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of the Company's Class A Common Stock.

F4 · derivative.exercise_date: On November 28, 2022, the Reporting Person was granted 16,432 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on February 28, 2024.

F4 · derivative.expiration_date: On November 28, 2022, the Reporting Person was granted 16,432 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on February 28, 2024.

SEC source: 0001967808-25-000003 · wk-form4_1756845649.xml · nonDerivative · entry 2

Krupka Devin M · CIK 0001967808 · Controller, PAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 27,547

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001967808-25-000003 · wk-form4_1756845649.xml · nonDerivative · entry 1

Krupka Devin M · CIK 0001967808 · Controller, PAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 24,771

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001842470-25-000003 · wk-form4_1756845490.xml · derivative · entry 5

Asbill Richard Brandon · CIK 0001842470 · General Counsel

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 20,843

Underlying: Class A Common Stock · 4,169 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of the Company's Class A Common Stock.

F5 · derivative.exercise_date: On November 28, 2023, the Reporting Person was granted 50,023 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on February 28, 2025.

F5 · derivative.expiration_date: On November 28, 2023, the Reporting Person was granted 50,023 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on February 28, 2025.

SEC source: 0001842470-25-000003 · wk-form4_1756845490.xml · derivative · entry 4

Asbill Richard Brandon · CIK 0001842470 · General Counsel

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,285

Underlying: Class A Common Stock · 2,286 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of the Company's Class A Common Stock.

F4 · derivative.exercise_date: On November 28, 2022, the Reporting Person was granted 27,424 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on February 28, 2024.

F4 · derivative.expiration_date: On November 28, 2022, the Reporting Person was granted 27,424 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on February 28, 2024.

SEC source: 0001842470-25-000003 · wk-form4_1756845490.xml · nonDerivative · entry 2

Asbill Richard Brandon · CIK 0001842470 · General Counsel

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 53,469

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001842470-25-000003 · wk-form4_1756845490.xml · nonDerivative · entry 1

Asbill Richard Brandon · CIK 0001842470 · General Counsel

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 49,300

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001807759-25-000003 · wk-form4_1756845565.xml · derivative · entry 7

Ross Kade · CIK 0001807759 · Chief Information Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 16,957

Underlying: Class A Common Stock · 3,392 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of the Company's Class A Common Stock.

F6 · derivative.exercise_date: On November 28, 2023, the Reporting Person was granted 40,697 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on February 28, 2025.

F6 · derivative.expiration_date: On November 28, 2023, the Reporting Person was granted 40,697 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on February 28, 2025.

SEC source: 0001807759-25-000003 · wk-form4_1756845565.xml · derivative · entry 6

Ross Kade · CIK 0001807759 · Chief Information Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,784

Underlying: Class A Common Stock · 446 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of the Company's Class A Common Stock.

F5 · derivative.exercise_date: On August 28, 2023, the Reporting Person was granted 5,353 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight quarterly installments beginning on November 28, 2024.

F5 · derivative.expiration_date: On August 28, 2023, the Reporting Person was granted 5,353 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight quarterly installments beginning on November 28, 2024.

SEC source: 0001807759-25-000003 · wk-form4_1756845565.xml · derivative · entry 5

Ross Kade · CIK 0001807759 · Chief Information Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,859

Underlying: Class A Common Stock · 1,859 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of the Company's Class A Common Stock.

F4 · derivative.exercise_date: On November 28, 2022, the Reporting Person was granted 22,311 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on February 28, 2024.

F4 · derivative.expiration_date: On November 28, 2022, the Reporting Person was granted 22,311 Restricted Stock Units, one third of which vested on the first anniversary of the date of grant and the remaining shares vest in eight equal quarterly installments beginning on February 28, 2024.