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 21, 2025

TrustCo Bank Corp NY

(Exact name of registrant as specified in its charter)

New York	0-10592	14-1630287
State or Other Jurisdiction of Incorporation or Organization	Commission File No.	I.R.S. Employer Identification Number

5 SARNOWSKI DRIVE, GLENVILLE, NEW YORK 12302

(Address of principal executive offices)

(518) 377-3311

(Registrant’s Telephone Number,

Including Area Code)

NOT APPLICABLE

(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, $1.00 par value		TRST		Nasdaq Global Select Market

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. ☐

TrustCo Bank Corp NY

Item 2.02.

Results of Operations and Financial Condition

On October 21, 2025 TrustCo Bank Corp NY (“TrustCo”) issued a press release with results for the quarter ending September 30, 2025. Attached is a copy of the press release labeled as Exhibit 99(a).

Item 9.01.

Financial Statements and Exhibits

(d)

Exhibits

Reg S-K Exhibit No.	Description

99(a)	Press release dated October 21, 2025 for the period ending September 30, 2025, regarding quarterly results.

104	Cover Page Interactive Data File – the cover page XBRL tags are embedded within the Inline XBRL document.

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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 thereunto duly authorized.

Dated: October 21, 2025

	TrustCo Bank Corp NY
	(Registrant)

	By:	/s/ Michael M. Ozimek
		Michael M. Ozimek
		Executive Vice President and
		Chief Financial Officer

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TRUSTCO BANK CORP N Y 8-K