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Form 8-K

sec.gov

8-K — Inspire Medical Systems, Inc.

Accession: 0001609550-26-000038

Filed: 2026-07-22

Period: 2026-07-16

CIK: 0001609550

SIC: 3841 (SURGICAL & MEDICAL INSTRUMENTS & APPARATUS)

Item: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Item: Financial Statements and Exhibits

Documents

8-K — insp-20260716.htm (Primary)

EX-99.1 (caseytanseydeparturepr.htm)

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8-K

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_________________________

FORM 8-K

_________________________

CURRENT REPORT

Pursuant to Section 13 or 15(d) of

the Securities Exchange Act of 1934

Date of report (Date of earliest event reported): July 16, 2026

_________________________

INSPIRE MEDICAL SYSTEMS, INC.

(Exact name of registrant as specified in its charter)

_________________________

Delaware 001-38468 26-1377674

(State or other jurisdiction of incorporation) (Commission File Number) (I.R.S. Employer Identification No.)

5500 Wayzata Blvd., Suite 1600

Golden Valley, Minnesota 55416

(Address of principal executive offices) (Zip Code)

(844) 672-4357

(Registrant’s telephone number, including area code)

N/A

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐     Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐     Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.001 par value per share INSP New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company     ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition

period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.02.     Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On July 16, 2026, Casey Tansey, a member of the Board of Directors (the “Board”) of Inspire Medical Systems, Inc. (the “Company”), notified the Company of his decision to retire from the Board (and the committees on which he serves) and not stand for re-election at the Company’s 2027 Annual Meeting of Stockholders (the “2027 Annual Meeting”). Mr. Tansey’s retirement will become effective July 30, 2026. Mr. Tansey’s decision to retire and not stand for re-election was not the result of any disagreement with the Company or any matter relating to the Company’s operation, policies or practices.

Item 9.01.    Financial Statements and Exhibits.

(d) Exhibits

Exhibit No. Description

99.1

Press release of Inspire Medical Systems, Inc., dated July 22, 2026.

104 Cover Page Interactive Data File (embedded within the Inline XBRL document).

2

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

INSPIRE MEDICAL SYSTEMS, INC.

Date: July 22, 2026 By: /s/ Bryan K. Phillips

Bryan K. Phillips

Sr. Vice President, General Counsel and Secretary

3

EX-99.1

EX-99.1

Filename: caseytanseydeparturepr.htm · Sequence: 2

Document

Exhibit 99.1

Inspire Medical Systems, Inc. Announces Retirement of Casey M. Tansey from its Board of Directors

MINNEAPOLIS, July 22, 2026 – Inspire Medical Systems, Inc. (NYSE: INSP), a medical technology company focused on innovative, minimally invasive solutions for patients with obstructive sleep apnea (OSA), today announced the retirement of Casey M. Tansey from the Inspire Board after more than eighteen years of service, effective July 30.

“We are thankful for the many contributions Mr. Tansey has made to our Board of Directors over the past eighteen years,” said Tim Herbert, Chairman and Chief Executive Officer of Inspire Medical Systems. “As one of the first venture investors to recognize the potential impact of Inspire therapy for patients with OSA, Mr. Tansey has provided valuable mentorship, leadership, and perspective throughout the Company’s founding, initial public offering and subsequent growth. We are grateful for his long-standing commitment and wish Mr. Tansey the very best in the future.”

Mr. Tansey represented U.S. Venture Partners and led Inspire’s Series A financing in November 2007 and has served on the Inspire Board of Directors since that time. The Company expects to announce the appointment of a new Director to replace Mr. Tansey in the near future.

About Inspire Medical Systems

Inspire is a medical technology company focused on the development and commercialization of innovative, minimally invasive solutions for patients with obstructive sleep apnea. Inspire’s proprietary Inspire therapy is the first FDA-, EU MDR-, and PDMA-approved neurostimulation technology that provides a safe and effective treatment for moderate to severe obstructive sleep apnea.

For additional information about Inspire, please visit www.inspiresleep.com.

Investor and Media Contact

Ezgi Yagci

Vice President, Investor Relations

ezgiyagci@inspiresleep.com

617-549-2443

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