The address of the principal business office of each of the other Reporting Persons and the other individuals named in this Item 2, unless otherwise noted below, is: c/o Kohlberg Kravis Roberts & Co. L.P. 30 Hudson Yards New York, New York 10001 The address of the principal business office of Mr. Roberts is: c/o Kohlberg Kravis Roberts & Co. L.P. 2800 Sand Hill Road, Suite 200 Menlo Park, CA 94025 The address of the principal business office of Mr. Holmes is: c/o Kohlberg Kravis Roberts & Co. L.P. 555 California Street, 50th Floor San Francisco, CA 94104 The address of the business office of each of the individuals listed on Annex A (other than Messrs. Kravis, Roberts, Bae, and Nuttall) is listed therein.

Tarheel Investors III L.P. is principally engaged in making investments. Each of Tarheel Investors III GP LLC, KKR North America Fund XIV SCSp, KKR Associates North America XIV SCSp, KKR North America XIV S.a r.l., KKR Associates Group L.P. and KKR Associates Group GP LLC is principally engaged in the business of being a general partner, sole member, or sole shareholder, as described above, and managing investments through other partnerships and limited liability companies. Each of KKR Group Partnership L.P., KKR Group Holdings Corp., KKR Group Co. Inc., KKR & Co. Inc., and KKR Management LLP is principally engaged in being a holding company. The present principal occupation or employment of each of Messrs. Kravis, Roberts, Bae, Nuttall, Lewin, and Holmes and Ms. Sudol is as an executive of Kohlberg Kravis Roberts & Co. L.P. and/or one or more of its affiliates. The present principal occupation of each of the other individuals named in Item 2 is listed on Annex A.

During the last five years, none of the Reporting Persons or, to the best knowledge of the Reporting Persons, any of the other individuals named in this Item 2, has been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).

During the last five years, none of the Reporting Persons or, to the best knowledge of the Reporting Persons, any of the other individuals named in this Item 2, has been party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding were or are subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

The information set forth in row (6) of the cover pages and Item 2(a) hereof is incorporated by reference into this Item 2(f).

The information set forth in Item 4 hereof is incorporated by reference into this Item 3.

Swap Transactions Tarheel Investors III L.P. previously held certain equity swaps with an unrelated counterparty ("Counterparty") that could be physically settled ("Equity Swaps") upon the satisfaction of certain regulatory conditions. On October 5, 2026, the regulatory conditions applicable to such Equity Swaps were satisfied and Tarheel Investors III L.P. acquired beneficial ownership of the Common Stock underlying the Equity Swaps, and subsequently received 4,753,677 shares of Common Stock for an aggregate payment upon settlement by Tarheel Investors III L.P. of $428,744,223. In addition, pursuant to a cash-settled swap ("Cash Swap") with the Counterparty, Tarheel Investors III L.P. has economic exposure to 836,392 underlying shares of Common Stock, but no voting or investment power with respect to, and therefore no beneficial ownership of, any shares of Common Stock held by the Counterparty. The foregoing description of the Cash Swap does not purport to be complete and is qualified in its entirety by reference to the full text of the share swap transaction confirmation, which is filed as Exhibit 99.3 to this Schedule 13D and is incorporated herein by reference. The Reporting Persons initially acquired the Equity Swaps and the Cash Swap for investment purposes. From time to time since acquiring the Equity Swaps and the Cash Swap, the Reporting Persons have engaged in evaluations of the Issuer and its business, including engaging in discussions with management of the Issuer, other shareholders, advisors and other persons to facilitate such evaluations. Merger Agreement On August 2, 2026, the Issuer entered into an Agreement and Plan of Merger (the "Merger Agreement"), by and among the Issuer, Armstrong Parent, Inc., a Delaware corporation ("Parent"), and Armstrong Bidco, Inc., a Delaware corporation and a wholly owned subsidiary of Parent ("Merger Sub"). Parent and Merger Sub are each affiliates of the Reporting Persons. Pursuant to the Merger Agreement, and upon the terms and subject to the conditions therein, Merger Sub will merge with and into the Issuer (the "Merger"), with the Issuer surviving the Merger as a wholly owned subsidiary of Parent. At the time of entry into the Merger Agreement, no Schedule 13D was filed as the Reporting Persons did not beneficially own greater than 5% of the Issuer's Common Stock because the regulatory conditions applicable to the Equity Swaps had not been satisfied. Subject to the terms and conditions of the Merger Agreement, at the effective time of the Merger (the "Effective Time"), each share of Common Stock issued and outstanding immediately prior to the Effective Time, subject to certain exceptions, will automatically be converted into the right to receive $127 in cash, without interest (the "Merger Consideration"). The Merger Agreement contains customary representations, warranties and covenants and the consummation of the Merger is subject to customary closing conditions. The foregoing description of the Merger Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Merger Agreement, which is filed as Exhibit 99.4 to this Schedule 13D and is incorporated herein by reference. Equity Commitment Letter KKR Core II Holding Company LLC, a Cayman Islands limited liability company and affiliate of the Reporting Persons ("Fund"), has committed to invest in Parent, directly or indirectly, the cash amounts set forth within an equity commitment letter delivered to Parent for the purpose of enabling Parent to pay the Merger Consideration at the Effective Time, subject to the terms and conditions set forth therein. The Fund has also provided the Issuer with a limited guarantee, which guarantees the payment of certain monetary obligations that may be owed by Parent to the Issuer pursuant to the Merger Agreement, including any reverse termination fee that may become payable by Parent, in each case, pursuant to and in accordance with the terms and conditions of the limited guarantee and Merger Agreement. Except as set forth above, the Reporting Persons and, to the best knowledge of the Reporting Persons, each of the other individuals named in Item 2 above, have no present plans, proposals or intentions that would result in or relate to any of the transactions described in clauses (a) through (j) of Item 4 of Schedule 13D. Although the foregoing reflects activities presently contemplated by the Reporting Persons and, to the best knowledge of the Reporting Persons, each of the other individuals named in Item 2 above, with respect to the Issuer, the foregoing is subject to change at any time.

The responses of the Reporting Persons to rows (11) and (13) on the cover pages hereof are hereby incorporated by reference into this Item 5(a). As of the date hereof, Tarheel Investors III L.P. directly holds 4,753,677 shares of Common Stock, representing approximately 14.0% of the outstanding shares of Common Stock, based upon an aggregate of 33,992,048 shares of Common Stock outstanding as of July 30, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on August 4, 2026. Such amounts do not include shares of Common Stock underlying the Cash Swap as such Cash Swap will settle in cash at closing of the Merger, accordingly, the Reporting Persons do not have a right to acquire or beneficially own such shares of Common Stock. Each of Tarheel Investors III GP LLC (as the general partner of Tarheel Investors III L.P.), KKR North America Fund XIV SCSp (as the sole member of Tarheel Investors III GP LLC), KKR Associates North America XIV SCSp (as the general partner of KKR North America Fund XIV SCSp), KKR North America XIV S.a r.l. (as the general partner of KKR Associates North America XIV SCSp), KKR Associates Group L.P. (as the sole shareholder of KKR North America XIV S.a r.l.), KKR Associates Group GP LLC (as the general partner of KKR Associates Group L.P.), KKR Group Partnership L.P. (as the sole member of KKR Associates Group GP LLC), KKR Group Holdings Corp. (as the general partner of KKR Group Partnership L.P.), KKR Group Co. Inc. (as the sole shareholder of KKR Group Holdings Corp.), KKR & Co. Inc. (as the sole shareholder of KKR Group Co. Inc.), KKR Management LLP (as the Series I preferred stockholder of KKR & Co. Inc.) and Messrs. Henry R. Kravis and George R. Roberts (as the founding partners of KKR Management LLP) may be deemed to be the beneficial owner of the securities held directly by Tarheel Investors III L.P., in each case, as described more fully in this Schedule 13D. The filing of this Schedule 13D shall not be construed as an admission that any of the above-listed entities or individuals is the beneficial owner of any securities covered by this Schedule 13D for purposes of Section 13(d) or Section 13(g) or for any other purposes. To the best knowledge of the Reporting Persons, none of the individuals named in Item 2 beneficially owns any shares of Common Stock except as described herein.

The responses of the Reporting Persons to rows (7) through (10) on the cover pages hereof and the information set forth in Item 5(a) hereof are incorporated by reference into this Item 5(b).

The information set forth in Item 4 hereof is incorporated by reference into this Item 5(c). Except as otherwise set forth herein, no Reporting Person, or, to the best knowledge of the Reporting Persons, any other individual named in Item 2, has engaged in any transaction in Common Stock during the past 60 days.

To the best knowledge of the Reporting Persons, no one other than the Reporting Persons, or the partners, members, affiliates or shareholders of the Reporting Persons, has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities of the Issuer reported as beneficially owned by the Reporting Persons herein.

Not applicable.

The information set forth in Item 4 hereof is incorporated by reference into this Item 6.

Exhibit 99.1 - Annex A List of Directors and Officers. Exhibit 99.2 - Joint Filing Agreement by and among the Reporting Persons. Exhibit 99.3 - Share Swap Transaction Confirmation (Cash-Settled), dated January 7, 2026, by and between Tarheel Investors III L.P. and Counterparty. Exhibit 99.4 - Agreement and Plan of Merger by and among Integer Holdings Corporation, Armstrong Parent, Inc., and Armstrong Bidco, Inc., dated August 2, 2026 (incorporated by reference to the Issuer's Current Report on Form 8-K filed with the SEC on August 4, 2026).