ISG (III) furnishes Q3 2025 release; Exhibit 99.1, non-GAAP noted

Rhea-AI Filing Summary

Information Services Group (ISG) furnished an Item 2.02 Form 8-K announcing its earnings release for the third quarter ended September 30, 2025. The company will discuss results on a teleconference at 9:00am ET on November 3, 2025, accessible via www.isg-one.com. The press release is included as Exhibit 99.1 and is furnished, not filed, under the Exchange Act.

ISG highlights the use of non-GAAP measures such as adjusted EBITDA, adjusted net income, adjusted EPS, and constant-currency metrics, with reconciliations to the nearest GAAP measures provided.

8-K Event Classification

2 items: 2.02, 9.01

2 items

Item 2.02 Results of Operations and Financial Condition Financial

Disclosure of earnings results, typically an earnings press release or preliminary financials.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, and exhibit attachments filed with this report.

Understanding 8-K Material Events →

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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FORM 8-K

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CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

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Date of Report (Date of earliest event reported) November 3, 2025 (November 3, 2025)

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Information Services Group, Inc.

(Exact name of registrant as specified in its charter)

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Delaware	​	001-33287	​	20-5261587
(State or other jurisdiction of incorporation)	​	(Commission File Number)	​	(I.R.S. Employer Identification No.)

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400 Atlantic Street

Stamford, CT 06901

(Address of principal executive offices)

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(203) 517-3100

(Registrant’s telephone number, including area code)

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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 (see General Instruction A.2 below):

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

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

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

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

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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).

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Emerging growth company ☐

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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. ☐

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

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Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Shares of Common Stock, $0.001 par value	III	The Nasdaq Stock Market LLC

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ITEM 2.02. RESULTS OF OPERATIONS AND FINANCIAL CONDITION

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On November 3, 2025 Information Services Group, Inc. (“ISG” or the “Company”) released its earnings for the third quarter 2025 which ended on September 30, 2025 and is furnishing a copy of the earnings release to the Securities and Exchange Commission under Item 2.02 of this Current Report on Form 8-K. In addition, ISG will discuss its financial results during a teleconference call on Monday, November 3, 2025 at 9:00am (ET). To access the teleconference call, go to ISG’s website at www.isg-one.com. The press release is furnished herewith as Exhibit 99.1 and shall not be deemed filed for purposes of the Exchange Act.

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ISG reports all financial information required in accordance with U.S. generally accepted accounting principles (GAAP). ISG believes, however, that evaluating its ongoing operating results will be enhanced if it also discloses certain non-GAAP information. These non-GAAP financial measures exclude non-cash and certain other special charges that many investors believe may obscure the user’s overall understanding of ISG’s current financial performance and the Company’s prospects for the future. ISG believes that these non-GAAP measures provide useful information to investors because they improve the comparability of the financial results between periods and provide for greater transparency of key measures used to evaluate the Company’s performance.

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ISG provides adjusted EBITDA (defined as net income, plus interest, taxes, depreciation and amortization, foreign currency transaction gains/losses, non-cash stock compensation, interest accretion associated with contingent consideration, acquisition and disposition-related cost, loss on the disposal of assets, gain on the sale of business and severance, integration and other expense), adjusted net income (defined as net income, plus amortization of intangible assets, non-cash stock compensation, foreign currency transaction gains/losses, interest accretion associated with contingent consideration, acquisition and disposition-related cost, loss on the disposal of assets, gain on the sale of business and severance, integration, and other expense on a tax-adjusted basis), adjusted net income per diluted share, adjusted EBITDA margin and selected financial data on a constant currency basis which are non-GAAP measures that the Company believes provide useful information to both management and investors by excluding certain expenses and financial implications of foreign currency translations, which management believes are not indicative of ISG’s core operations. These non-GAAP measures are used by ISG to evaluate the Company’s business strategies and management’s performance.

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Non-GAAP financial measures, when presented, are reconciled to the most closely applicable GAAP measure. Non-GAAP measures are provided as additional information and should not be considered in isolation or as a substitute for results prepared in accordance with GAAP.

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ITEM 9.01 FINANCIAL STATEMENTS AND EXHIBITS

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(d)Exhibit.

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99.1Press Release dated November 3, 2025 regarding earnings for the third quarter 2025

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EXHIBIT INDEX

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Exhibit Number	​	Description
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99.1 ​ ​ 104	​	Press Release dated November 3, 2025 regarding earnings for the third quarter 2025. ​ Cover Page Interactive Data file – the cover page iXBRL tags are embedded within the inline XBRL document. ​
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SIGNATURES

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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.

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Dated: November 3, 2025	INFORMATION SERVICES GROUP, INC.
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​	By:	/s/ Michael P. Connors
​	​	Michael P. Connors
​	​	Chairman and Chief Executive Officer

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FAQ

What did ISG (III) announce in this Form 8-K?

ISG furnished an earnings release for the quarter ended September 30, 2025, and provided access details for a same-day results call.

When is ISG’s Q3 2025 earnings call and how can I access it?

The call is at 9:00am ET on November 3, 2025. Access it via the company’s website at www.isg-one.com.

Which exhibit contains ISG’s Q3 2025 earnings press release?

The press release is furnished as Exhibit 99.1.

What period does ISG’s reported quarter cover?

The third quarter of 2025, which ended on September 30, 2025.

Which non-GAAP measures does ISG reference?

ISG references adjusted EBITDA, adjusted net income, adjusted diluted EPS, adjusted EBITDA margin, and selected constant-currency data, with GAAP reconciliations.

Are the non-GAAP measures reconciled to GAAP?

Yes. ISG states that non-GAAP measures are reconciled to the closest GAAP measures and are provided as additional information.

Is the earnings press release considered filed or furnished?

It is furnished under Item 2.02 and is not deemed filed for purposes of the Exchange Act.