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 dated February 25, 2016.)

10.1 – Lease Agreement dated April 4, 2024, by and among Prisma Shelter, S. de R.L. de C.V., Clearfield, Inc., and Banco Actinver, S.A., Institución de Banca Múltiple, Grupo Financiero Actinver, solely in its capacity as Trustee of Trust No. 3218. (Incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K dated April 9, 2024.)

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 March 31, 2024 are formatted in iXBRL (Inline eXtensible Business Reporting Language): (i) Consolidated Balance Sheets at March 31, 2024 and March 31, 2024; (ii) Consolidated Statements of Earnings for the three and six months ended March 31, 2024 and 2023; (iii) Consolidated Statements of Shareholders’ Equity for the three and six months ended March 31, 2024 and 2023; (iv) Consolidated Statements of Cash Flows for the six months ended March 31, 2024 and 2023; and (v) Notes to the Consolidated Financial Statements.

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