[8-K] Pulmatrix, Inc. Reports Material Event

Rhea-AI Filing Summary

Pulmatrix, Inc. furnished an 8-K announcing it issued a press release with financial results for the third fiscal quarter ended September 30, 2025, along with a corporate update. The press release is provided as Exhibit 99.1 and incorporated by reference.

Consistent with General Instruction B.2 to Item 2.02, the information in this report, including Exhibit 99.1, is furnished and not deemed filed under the Exchange Act.

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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): October 16, 2025

PULMATRIX, INC.

(Exact name of registrant as specified in its charter)

Delaware		001-36199		46-1821392
(State or other jurisdiction of incorporation)		(Commission File Number)		(IRS Employer Identification No.)

945 Concord Street, Suite 1217

Framingham, MA 01701

(Address of principal executive offices) (Zip Code)

(888) 355-4440

(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 exchange on which registered
Common Stock, par value $0.0001 per share		PULM		The NASDAQ Stock Market LLC

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 2.02 Results of Operations and Financial Condition.

On October 16, 2025, Pulmatrix, Inc. issued a press release announcing its financial results for the third fiscal quarter ended September 30, 2025, and provided a corporate update. A copy of the press release is furnished as Exhibit 99.1 hereto and is incorporated herein by reference.

In accordance with General Instruction B.2 of Form 8-K, the information in this Current Report on Form 8-K, including Exhibit 99.1, being furnished pursuant to Item 2.02, shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit No.		Description
99.1		Press Release dated October 16, 2025*
104		Cover Page Interactive Data File (formatted as Inline XBRL)

* This exhibit is furnished pursuant to Item 2.02 and shall not be deemed to be “filed.”

SIGNATURES

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

	PULMATRIX, INC.
Date: October 16, 2025	By:	/s/ Peter Ludlum
		Peter Ludlum
		Interim Chief Executive Officer and Interim Chief Financial Officer

FAQ

What did Pulmatrix (PULM) disclose in this 8-K?

The company furnished a press release announcing financial results for the third fiscal quarter ended September 30, 2025, and provided a corporate update as Exhibit 99.1.

Which period does Pulmatrix’s (PULM) update cover?

The third fiscal quarter ended September 30, 2025.

Is the Pulmatrix (PULM) press release filed or furnished?

It is furnished pursuant to Item 2.02 and, under General Instruction B.2, is not deemed filed under the Exchange Act.

Where can I find the Pulmatrix (PULM) press release in the 8-K?

It is included as Exhibit 99.1 to the report.

Who signed the Pulmatrix (PULM) 8-K?

Peter Ludlum, Interim Chief Executive Officer and Interim Chief Financial Officer, signed the report.

What is Pulmatrix’s (PULM) trading symbol and exchange?

The common stock trades on The NASDAQ Stock Market LLC under the symbol PULM.