InTest Corporation (NYSE:INTT), a global supplier of innovative test and process technology solutions for use in manufacturing and testing in key target markets which include Semiconductor, Auto/EV, Defense/Aerospace, Industrial, Life Sciences, and Safety/Security, today announced that it has been added as a member of the Russell 2000® and the Russell 3000® indexes, effective when the US market opens on June 29, as part of the first 2026 Russell indexes reconstitution. InTest retains membership in the Russell Microcap® Index.

The June reconstitution of the Russell US indexes captures up to the 4,000 largest US stocks as of April 30, ranking them by total market capitalization. Membership in the Russell 3000® Index, which remains in place for half a year beginning 2026, means automatic inclusion in the large-cap Russell 1000® Index or small-cap Russell 2000® Index as well as the appropriate growth and value style indexes. FTSE Russell determines membership for its Russell indexes primarily by objective, market-capitalization rankings and style attributes.

Russell indexes are widely used by investment managers and institutional investors for index funds and as benchmarks for active investment strategies. According to data as of the end of June 2025, about $12.2 trillion in assets are benchmarked against the Russell US indexes, which belong to FTSE Russell, the global index provider. For more information on the Russell 2000 and 3000 Indexes and the Russell indexes reconstitution, go to the "Russell Reconstitution" section on the FTSE Russell website.

About InTest Corporation

InTest Corporation is a global supplier of innovative test and process technology solutions for use in manufacturing and testing in key target markets including both the front-end and back-end of the semiconductor manufacturing industry ("Semi"), Automotive/EV, Defense/Aerospace, Industrial, Life Sciences and Safety/Security. Backed by decades of engineering expertise and a culture of operational excellence, InTest solves difficult thermal, mechanical, and electronic challenges for customers worldwide. InTest’s growth strategy leverages these strengths to grow organically and with acquisitions through the addition of innovative technologies, deeper and broader geographic reach, customer penetration and market expansion. For more information, visit https://www.intest.com/.

Forward-Looking Statements

This press release includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, as amended. These statements do not convey historical information but relate to predicted or potential future events and financial results, such as statements of the Company’s plans, strategies and intentions, or our future performance or goals, that are based upon management’s current expectations. These forward-looking statements can often be identified by the use of forward-looking terminology such as "believe," "continue," "expects," "guidance," "intended," "may," "outlook," "will," "plan," "potential," "strategy," "target," "estimated," or similar terminology. These statements are subject to risks and uncertainties that could cause actual results to differ materially from those expressed or implied by such statements. Such risks and uncertainties include, but are not limited to, any mentioned in this press release as well as the Company’s ability to execute on its VISION 2030 Strategy; realize the potential benefits of acquisitions and successfully integrate any acquired operations; grow the Company’s presence in its key target and international markets; manage supply chain challenges; convert backlog to sales and to ship product in a timely manner; the success of the Company’s strategy to diversify its markets; the impact of inflation on the Company’s business and financial condition; indications of a change in the market cycles in the semi market or other markets served; changes in business conditions and general economic conditions both domestically and globally including changes in U.S. and/or foreign trade policy, rising interest rates and fluctuation in foreign currency exchange rates; changes in the demand for semiconductors; access to capital and the ability to borrow funds or raise capital to finance potential acquisitions or for working capital; changes in the rates and timing of capital expenditures by the Company’s customers; and other risk factors set forth from time to time in the Company’s Securities and Exchange Commission filings, including, but not limited to, the Annual Report on Form 10-K for the year ended December 31, 2025, and any subsequent Quarterly Reports on Form 10-Q. Any forward-looking statement made by the Company in this press release is based only on information currently available to management and speaks to circumstances only as of the date on which it is made. The Company undertakes no obligation to update the information in this press release to reflect events or circumstances after the date hereof or to reflect the occurrence of anticipated or unanticipated events, except as required by law.

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InTest Corporation:

Duncan Gilmour

Chief Financial Officer and Treasurer

Tel: (856) 505-8999

Investors:

Jody Burfening / Sanjay M. Hurry

Alliance Advisors IR

INTTIR@allianceadvisors.com

Tel: (212) 838-3777