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Bandwidth Inc.

For the period ended Sep 30, 2026. Filed Oct 29, 2026.

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About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Sep 30, 2026 · Filed Oct 29, 2026

BAND$41.86+3.8%Stored close · as of Nov 9, 2026

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Item 6. Exhibits

Exhibit Index

ExhibitnumberDescription of ExhibitFormFile No.ExhibitFiling Date
3.1Second Amended and Restated Certificate of Incorporation.10-Q001-382853.112/14/2017
3.2Third Amended and Restated Bylaws.8-K001-382853.111/2/2023
10.1Letter Agreement, dated August 31, 2026, between the Company and Mr. Asbill.8-K001-3828510.19/4/2026
10.2Employment Agreement, dated September 1, 2026, between the Company and Ms. Harlan.8-K001-3828510.29/4/2026
10.3Fourth Amendment to Credit Agreement among Bandwidth Inc., certain subsidiaries of Bandwidth Inc., the several lenders from time to time party thereto, and Bank of America, N.A., dated as of October 26, 2026.Filed herewith
31.1Certification of the Chief Executive Officer pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.Filed herewith
31.2Certification of the Chief Financial Officer pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.Filed herewith
32.1*Certification of the Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act 2002.Furnished herewith
101.INSXBRL Instance Document - the Instance Document does not appear in the interactive data file because its XBRL tags are embedded within the Inline XBRL Document.Filed herewith
101.SCHXBRL Taxonomy Schema Document.Filed herewith
101.CALXBRL Taxonomy Extension Calculation Linkbase Document.Filed herewith
101.DEFXBRL Taxonomy Extension Definition Linkbase Document.Filed herewith
101.LABXBRL Taxonomy Extension Label Linkbase Document.Filed herewith
101.PREXBRL Taxonomy Extension Presentation Linkbase Document.Filed herewith
104Cover Page Interactive Data File (embedded within the Inline XBRL document).Filed herewith

*The certifications furnished in Exhibit 32.1 hereto are deemed to accompany this Quarterly Report on Form 10-Q and will not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, except to the extent that the registrant specifically incorporates it by reference.

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.