Clearfield Inc

3.1 – Restated Articles of Incorporation of APA Optics, Inc. (n/k/a Clearfield, Inc.) dated November 3, 1983, and Articles of Amendment dated December 9, 1983, July 30, 1987, March 22, 1989, September 14, 1994 and August 17, 2000. (Incorporated by reference to Exhibit 3.1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2000.)

3.1(a) – Articles of Amendment to Articles of Incorporation dated August 25, 2004. (Incorporated by reference to Exhibit 3.1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2004.)

3.2 – Amended and Restated Bylaws of Clearfield, Inc. (Incorporated by reference to the Company’s Current Report on Form 8-K filed February 25, 2016.)

10.1 – Form of Performance Stock Unit Agreement under the Clearfield, Inc. 2022 Stock Compensation Plan. (Incorporated by reference to Exhibit 10.16 to the Company’s Annual Report on Form 10-K for the year ended September 30, 2023.)

31.1 – Certification of Chief Executive Officer pursuant to Rules 13a-14(a) and 15d-14(a) of the Exchange Act

31.2 – Certification of Chief Financial Officer pursuant to Rules 13a-14(a) and 15d-14(a) of the Exchange Act

32.1 – Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. §1350

101 – The following materials from Clearfield, Inc.’s Quarterly Report on Form 10-Q for the period ended December 31, 2023 are formatted in iXBRL (Inline eXtensible Business Reporting Language): (i) Consolidated Balance Sheets at December 31, 2023 and December 31, 2022; (ii) Consolidated Statements of Earnings for the three months ended December 31, 2023 and 2022; (iii) Consolidated Statements of Shareholders’ Equity for the three months ended December 31, 2023 and 2022; (iv) Consolidated Statements of Cash Flows for the three months ended December 31, 2023 and 2022; and (v) Notes to the Consolidated Financial Statements.

104 - Cover Page Interactive Data File (formatted in Inline XBRL and contained in Exhibit 101).