BAND

SEC source: 0001405026-26-000043 · wk-form4_1788293930.xml · derivative · entry 6

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,850

Underlying: Class A Common Stock · 6,170 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, 2024, the Reporting Person was granted 74,040 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, 2026.

F5 · derivative.expiration_date: On November 28, 2024, the Reporting Person was granted 74,040 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, 2026.

SEC source: 0001405026-26-000043 · wk-form4_1788293930.xml · derivative · entry 5

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,731

Underlying: Class A Common Stock · 5,730 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, 2023, the Reporting Person was granted 68,767 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.

F4 · derivative.expiration_date: On November 28, 2023, the Reporting Person was granted 68,767 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: 0001405026-26-000043 · wk-form4_1788293930.xml · nonDerivative · entry 2

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,505

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: 0001405026-26-000043 · wk-form4_1788293930.xml · nonDerivative · entry 1

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,335

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: 0001721962-26-000019 · wk-form4_1788293904.xml · derivative · entry 6

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,514

Underlying: Class A Common Stock · 4,103 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, 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 vest in eight equal quarterly installments beginning on February 28, 2026.

F5 · 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 vest in eight equal quarterly installments beginning on February 28, 2026.

SEC source: 0001721962-26-000019 · wk-form4_1788293904.xml · derivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,727

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.

F4 · 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.

F4 · 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: 0001721962-26-000019 · wk-form4_1788293904.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,830

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: 0001721962-26-000019 · wk-form4_1788293904.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,727

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: 0001527937-26-000010 · wk-form4_1788293860.xml · derivative · entry 2

Suriano Douglas A · CIK 0001527937 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,333

Underlying: Class A Common Stock · 3,333 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, 2025, the Reporting Person was granted 13,333 Restricted Stock Units, which vest in four equal quarterly installments beginning on February 28, 2026.

F2 · 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: 0001527937-26-000010 · wk-form4_1788293860.xml · nonDerivative · entry 1

Suriano Douglas A · CIK 0001527937 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,410

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: 0001575505-26-000007 · wk-form4_1788293826.xml · derivative · entry 2

Bailey Brian D. · CIK 0001575505 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,333

Underlying: Class A Common Stock · 3,333 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, 2025, the Reporting Person was granted 13,333 Restricted Stock Units, which vest in four equal quarterly installments beginning on February 28, 2026.

F5 · 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: 0001575505-26-000007 · wk-form4_1788293826.xml · nonDerivative · entry 1

Bailey Brian D. · CIK 0001575505 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 75,422

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 CP 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 CP and 66,672 shares of Class A Common Stock held of record by Brian D. Bailey.

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

SEC source: 0001758209-26-000013 · wk-form4_1788207266.xml · nonDerivative · entry 1

Roush Lukas M. · CIK 0001758209 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 58,436

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on May 28, 2026.

SEC source: 0001527937-26-000008 · wk-form4_1787083534.xml · nonDerivative · entry 2

Suriano Douglas A · CIK 0001527937 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,077

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on May 18, 2026.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $54.16 to $54.17. 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: 0001527937-26-000008 · wk-form4_1787083534.xml · nonDerivative · entry 1

Suriano Douglas A · CIK 0001527937 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,277

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on May 18, 2026.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $52.61 to $53.45. 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: 0002029692-26-000026 · wk-form4_1786392295.xml · nonDerivative · entry 2

Agarwal Devesh · CIK 0002029692 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 72,776

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $50.085 to $51.02. 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: 0002029692-26-000026 · wk-form4_1786392295.xml · derivative · entry 3

Agarwal Devesh · CIK 0002029692 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 7,370 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.

F2 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of the Company's Class A Common Stock.

F3 · derivative.exercise_date: On August 8, 2022, the Reporting Person was granted 29,481 Restricted Stock Units, which vested in four equal annual installments beginning on August 8, 2023.

F3 · derivative.expiration_date: On August 8, 2022, the Reporting Person was granted 29,481 Restricted Stock Units, which vested in four equal annual installments beginning on August 8, 2023.

SEC source: 0002029692-26-000026 · wk-form4_1786392295.xml · nonDerivative · entry 1

Agarwal Devesh · CIK 0002029692 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,949

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: 0001967808-26-000023 · wk-form4_1781554275.xml · nonDerivative · entry 4

Krupka Devin M · CIK 0001967808 · Controller, PAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 11,958

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on March 13, 2026.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $66.69 to $66.81. 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: 0001967808-26-000023 · wk-form4_1781554275.xml · nonDerivative · entry 3

Krupka Devin M · CIK 0001967808 · Controller, PAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 12,414

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on March 13, 2026.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $65.65 to $66.625. 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: 0001967808-26-000023 · wk-form4_1781554275.xml · nonDerivative · entry 2

Krupka Devin M · CIK 0001967808 · Controller, PAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 17,308

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on March 13, 2026.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.64 to $65.63. 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: 0001967808-26-000023 · wk-form4_1781554275.xml · nonDerivative · entry 1

Krupka Devin M · CIK 0001967808 · Controller, PAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 24,571

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on March 13, 2026.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $63.56 to $64.545. 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: 0001842470-26-000024 · wk-form4_1780949983.xml · nonDerivative · entry 2

Asbill Richard Brandon · CIK 0001842470 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,000

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $72.04 to $72.99. 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: 0001842470-26-000024 · wk-form4_1780949983.xml · nonDerivative · entry 1

Asbill Richard Brandon · CIK 0001842470 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,884

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $71.00 to $71.99. 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: 0001721962-26-000015 · wk-form4_1780690087.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · kind: This transaction involved the Reporting Person's gift of shares of Bandwidth Inc. Class A Common Stock to an irrevocable trust for which he does not exercise or share voting or investment control. The Reporting Person disclaims beneficial ownership of the securities held by the trust, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner for the purposes of Section 16 or for any other purpose.

SEC source: 0001807759-26-000016 · wk-form4_1780517444.xml · nonDerivative · entry 5

Ross Kade · CIK 0001807759 · Chief Information Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 43,996

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on November 24, 2025.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $72.44 to $72.58. 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: 0001807759-26-000016 · wk-form4_1780517444.xml · nonDerivative · entry 4

Ross Kade · CIK 0001807759 · Chief Information Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 44,044

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on November 24, 2025.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $71.275 to $72.05. 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: 0001807759-26-000016 · wk-form4_1780517444.xml · nonDerivative · entry 3

Ross Kade · CIK 0001807759 · Chief Information Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 44,220

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on November 24, 2025.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $70.24 to $71.02. 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: 0001807759-26-000016 · wk-form4_1780517444.xml · nonDerivative · entry 2

Ross Kade · CIK 0001807759 · Chief Information Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 44,912

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on November 24, 2025.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $69.22 to $70.21. 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: 0001807759-26-000016 · wk-form4_1780517444.xml · nonDerivative · entry 1

Ross Kade · CIK 0001807759 · Chief Information Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 45,772

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on November 24, 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 $68.20 to $69.15. 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: 0001405026-26-000039 · wk-form4_1780517413.xml · nonDerivative · entry 13

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 28,605

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 3, 2025.

SEC source: 0001405026-26-000039 · wk-form4_1780517413.xml · nonDerivative · entry 12

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 28,705

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 3, 2025.

F13 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $71.13 to $71.19. 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: 0001405026-26-000039 · wk-form4_1780517413.xml · nonDerivative · entry 11

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 29,205

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 3, 2025.

F12 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $69.98 to $70.81. 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: 0001405026-26-000039 · wk-form4_1780517413.xml · nonDerivative · entry 10

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 30,405

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 3, 2025.

F11 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.80 to $69.75. 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: 0001405026-26-000039 · wk-form4_1780517413.xml · nonDerivative · entry 9

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 32,111

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 3, 2025.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $67.80 to $68.79. 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: 0001405026-26-000037 · wk-form4_1780346525.xml · nonDerivative · entry 8

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,919

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.69 to $64.70. 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: 0001405026-26-000037 · wk-form4_1780346525.xml · nonDerivative · entry 7

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,619

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $63.48 to $64.455. 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: 0001405026-26-000039 · wk-form4_1780517413.xml · nonDerivative · entry 8

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 34,979

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 3, 2025.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $71.31 to $71.73. 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: 0001405026-26-000039 · wk-form4_1780517413.xml · nonDerivative · entry 7

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 36,179

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 3, 2025.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $70.25 to $71.18. 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: 0001405026-26-000039 · wk-form4_1780517413.xml · nonDerivative · entry 6

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 39,119

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 3, 2025.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $69.07 to $69.64. 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: 0001405026-26-000039 · wk-form4_1780517413.xml · nonDerivative · entry 5

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 39,719

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 3, 2025.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $67.94 to $68.06. 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: 0001405026-26-000039 · wk-form4_1780517413.xml · nonDerivative · entry 4

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 40,119

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 3, 2025.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $66.88 to $67.74. 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: 0001405026-26-000039 · wk-form4_1780517413.xml · nonDerivative · entry 3

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 40,519

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 3, 2025.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $65.06 to $65.39. 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: 0001405026-26-000039 · wk-form4_1780517413.xml · nonDerivative · entry 2

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 40,919

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 3, 2025.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.05 to $65.00. 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: 0001405026-26-000039 · wk-form4_1780517413.xml · nonDerivative · entry 1

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 41,919

F1 · kind: Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 3, 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 $62.93 to $63.87. 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: 0001405026-26-000037 · wk-form4_1780346525.xml · derivative · entry 11

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 10,602 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.

F5 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of the Company's Class A Common Stock.

F8 · derivative.exercise_date: On May 30, 2023, the Reporting Person was granted 127,226 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 August 28, 2024.

F8 · derivative.expiration_date: On May 30, 2023, the Reporting Person was granted 127,226 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 August 28, 2024.

SEC source: 0001405026-26-000037 · wk-form4_1780346525.xml · nonDerivative · entry 6

Raiford Daryl E · CIK 0001405026 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,147

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: 0002029692-26-000020 · wk-form4_1780346550.xml · nonDerivative · entry 6

Agarwal Devesh · CIK 0002029692 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 68,579

SEC source: 0002029692-26-000020 · wk-form4_1780346550.xml · nonDerivative · entry 5

Agarwal Devesh · CIK 0002029692 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 68,586

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $58.89 to $59.75. 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: 0002029692-26-000020 · wk-form4_1780346550.xml · nonDerivative · entry 4

Agarwal Devesh · CIK 0002029692 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 70,323

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $57.88 to $58.88. 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.