Exhibit 3.1

CERTIFICATE OF

FOURTH AMENDMENT

TO

BYLAWS OF

SKECHERS U.S.A., INC.,

a Delaware corporation

Article II, Sections 2.4, 2.7 and 2.9 and Article III, Section 3.11 of the Bylaws of Skechers U.S.A., Inc., a Delaware corporation (the “Company”) was amended, effective as of March 9, 2023, by duly adopted resolution of the Board of Directors of the Company.

Article II, Section 2.4 was amended to provide in its entirety as follows:

SECTION 2.4 Notice of Meetings. Except as otherwise required by law, notice of each meeting of stockholders, whether annual or special, shall be given not less than ten (10) days nor more than sixty (60) days before the date of the meeting to each stockholder of record entitled to vote at such meeting by delivering a typewritten or printed notice thereof to such stockholder personally, or by depositing such notice in the United States mail, in a postage prepaid envelope, directed to such stockholder at such stockholder’s post office address furnished by such stockholder to the Secretary of the Corporation for such purpose, or, if such stockholder shall not have furnished an address to the Secretary for such purpose, then at such stockholder’s post office address last known to the Secretary, or by transmitting a notice thereof to such stockholder at such address by telegraph, cable, wireless or facsimile. Except as otherwise expressly required by law, no publication of any notice of a meeting of stockholders shall be required. Every notice of a meeting of stockholders shall state the place, date and hour of the meeting, the means of remote communication, if any, by which stockholders and proxy holders may be deemed to be present in person and vote at such meeting, and, in the case of a special meeting, shall also state the purpose for which the meeting is called. Notice of any meeting of stockholders shall not be required to be given to any stockholder to whom notice may be omitted pursuant to applicable Delaware law or who shall have waived such notice, and such notice shall be deemed waived by any stockholder who shall attend such meeting in person or by proxy, except a stockholder who shall attend such meeting for the express purpose of objecting, at the beginning of the meeting, to the transaction of any business because the meeting is not lawfully called or convened. Except as otherwise expressly required by law, notice of any adjourned meeting of stockholders need not be given if the time and place thereof are announced at the meeting at which the adjournment is taken.

Article II, Section 2.7 was amended to provide in its entirety as follows:

SECTION 2.7 Voting.

(A) Each stockholder shall, at each meeting of stockholders, be entitled to vote, in the manner prescribed by the Corporation’s Certificate of Incorporation, in person or by proxy authorized by an instrument in writing or by a transmission permitted by law, including Rule 14a-19 promulgated under the Securities Exchange Act of 1934, as amended, each share of the stock of the Corporation that has voting rights on the matter in question and that shall have been held by such stockholder and registered in such stockholder’s name on the books of the Corporation:

(i) on the date fixed pursuant to Section 2.5 of these Bylaws as the record date for the determination of stockholders entitled to notice of and to vote at such meeting; or

(ii) if no such record date shall have been so fixed, then (a) at the close of business on the business day next preceding the day upon which notice of the meeting shall be given or (b) if notice of the meeting shall be waived, at the close of business on the business day next preceding the day upon which the meeting shall be held.

(B) Shares of the Corporation’s own stock belonging to the Corporation or to another corporation, if a majority of the shares entitled to vote in the election of directors in such other corporation is held, directly or indirectly, by the Corporation, shall neither be entitled to vote nor be counted for quorum purposes. Persons holding stock of the Corporation in a fiduciary capacity shall be entitled to vote such stock. Persons whose stock is pledged shall be entitled to vote, unless in the transfer by the pledgor on the books of the Corporation the pledgor shall have expressly empowered the pledgee to vote thereon, in which case only the pledgee, or the pledgee’s proxy, may represent such stock and vote thereon. Stock having voting power standing of record in the names of two or more persons, whether fiduciaries, members of a partnership, joint tenants, tenants in common, tenants by the entirety or otherwise, or with respect to which two or more persons have the same fiduciary relationship, shall be voted in accordance with the provisions of the Delaware General Corporation Law, as the same exists or may hereafter be amended (the “DGCL”).

(C) Subject to the provisions of the Corporation’s Certificate of Incorporation, any such voting rights may be exercised by the stockholder entitled thereto in person or by such stockholder’s proxy appointed by an instrument in writing, subscribed by such stockholder or by such stockholder’s attorney thereunto authorized and delivered to the secretary of the meeting. The attendance at any meeting of a stockholder who may theretofore have given a proxy shall not have the effect of revoking the same unless such stockholder shall in writing so notify the secretary of the meeting prior to the voting of the proxy. At any meeting of stockholders at which a quorum is present, all matters, except as otherwise provided in the Certificate of Incorporation, in these Bylaws or bylaw, shall be decided by the vote of a majority in voting interest of the stockholders present in person or by proxy and entitled to vote thereat and thereon. The vote at any meeting of stockholders on any question need not be by ballot, unless so directed by the chairman of the meeting. On a vote by ballot, each ballot shall be signed by the stockholder voting, or by such stockholder’s proxy, if there be such proxy, and it shall state the number of shares voted.

Any stockholder directly or indirectly soliciting proxies from other stockholders must use a proxy card color other than white, which shall be reserved for the exclusive use by the Board.

Article II, Section 2.9 was amended to provide in its entirety as follows:

SECTION 2.9 Advance Notice of Stockholder Proposals and Stockholder Nominations.

(A) At any meeting of the stockholders, only such business shall be conducted as shall have been brought before the meeting (i) by or at the direction of the Board or (ii) by any stockholder of the Corporation who complies with the notice procedures set forth in this Section 2.9(A). For business to be properly brought before any meeting of the stockholders by a stockholder, the stockholder must have given notice thereof in writing to the Secretary of the Corporation not less than ninety (90) days in advance of such meeting or, if later, the seventh day following the first public announcement of the date of such meeting. A stockholder’s notice to the Secretary shall set forth as to each matter the stockholder proposes to bring before the meeting (1) a brief description of the business desired to be brought before the meeting and the reasons for conducting such business at the meeting, (2) the

name and address, as they appear on the Corporation’s books, of the stockholder proposing such business, (3) the class and number of shares of the Corporation that are beneficially owned by the stockholder, (4) any material interest of the stockholder in such business; (5) any other information relating to such item of business that would be required to be disclosed in a proxy statement or other filing required to be made in connection with solicitations of proxies in support of the business proposed to be brought before the meeting pursuant to Section 14(a) of the Exchange Act; and (6) for nominations, a representation that the stockholder intends or is part of a group which intends to deliver a proxy statement and/or form of proxy to holders of at least the percentage of the Corporation’s outstanding capital stock required to elect any nominee and solicit the holders of shares representing at least 67% of the voting power of shares entitled to vote on the election of directors in support of director nominees other than the corporation’s nominees in accordance with Rule 14a-19 promulgated under the Exchange Act. In addition, the stockholder making such proposal shall promptly provide any other information reasonably requested by the Corporation. Notwithstanding anything in these Bylaws to the contrary, no business shall be conducted at any meeting of the stockholders except in accordance with the procedures set forth in this Section 2.9. The Chairman of any such meeting shall direct that any business not properly brought before the meeting shall not be considered.

(B) Nominations for the election of directors may be made by the Board or by any stockholder entitled to vote in the election of directors; provided, however, that a stockholder may nominate a person for election as a director at a meeting only if written notice of such stockholder’s intent to make such nomination has been given to the Secretary of the Corporation not later than ninety (90) days in advance of such meeting or, if later, the seventh day following the first public announcement of the date of such meeting. Each such notice shall set forth: (i) the name and address of the stockholder who intends to make the nomination and of the person or persons to be nominated; (ii) a representation that the stockholder is a holder of record of stock of the Corporation entitled to vote at such meeting and intends to appear in person or by proxy at the meeting and nominate the person or persons specified in the notice; (iii) a description of all arrangements or understandings between the stockholder and each nominee and any other person or persons (naming such person or persons) pursuant to which the nomination or nominations are to be made by the stockholder; (iv) such other information regarding each nominee proposed by such stockholder as would be required to be included in a proxy statement filed pursuant to the proxy rules of the United States Securities and Exchange Commission had the nominee been nominated, or intended to be nominated, by the Board; and (v) the consent of each nominee to be named in the proxy and accompanying proxy card and to serve as a director of the Corporation if so elected for a full term until the next meeting at which such nominee would face re-election. In addition, the stockholder making such nomination shall promptly provide any other information reasonably requested by the Corporation. No person shall be eligible for election as a director of the Corporation unless nominated in accordance with the procedures set forth in this Section 2.9(B). The Chairman of any meeting of stockholders shall direct that any nomination not made in accordance with these procedures be disregarded.

(C) Notwithstanding anything to the contrary in this Section 2.9, in no event may a stockholder provide timely notice with respect to a greater number of director candidates than are subject to election by stockholders at the annual meeting or special meeting, as applicable.

(D) In addition to the requirements of this Section 2.9 with respect to any nomination proposed to be made at a meeting, each stockholder providing notice as to nominations pursuant to this Section 2.9 shall comply with all applicable requirements of the Exchange Act with respect to any such nominations.

Notwithstanding the foregoing provisions of this Section 2.9, unless otherwise required by law, (i) no such stockholder shall solicit proxies in support of director nominees other than the corporation’s nominees unless such stockholder has complied with Rule 14a-19 promulgated under the Exchange Act in connection with the solicitation of such proxies, including the provision to the corporation of notices required thereunder in a timely manner and (ii) if any such stockholder (1) provides notice pursuant to Rule 14a-19(b) promulgated under the Exchange Act and (2) subsequently fails to comply with the requirements of Rule 14a-19(a)(2) and Rule 14a-19(a)(3) promulgated under the Exchange Act, including the provision to the corporation of notices required thereunder in a timely manner, or fails to timely provide reasonable evidence sufficient to satisfy the corporation that such stockholder has met the requirements of Rule 14a-19(a)(3) promulgated under the Exchange Act in accordance with the following sentence, then the corporation shall disregard any proxies or votes solicited for such stockholder’s candidates. If any such stockholder provides notice pursuant to Rule 14a-19(b) promulgated under the Exchange Act, such stockholder shall deliver to the corporation, no later than seven (7) business days prior to the applicable meeting, reasonable evidence that it has met the requirements of Rule 14a-19(a)(3) promulgated under the Exchange Act.

Article III, Section 3.11 was amended to provide in its entirety as follows:

SECTION 3.11 Action by Unanimous Written Consent. Any action required or permitted to be taken at any meeting of the Board or of any committee thereof may be taken without a meeting if consent in writing or by electronic transmission, in compliance with applicable law, is given thereto by all members of the Board or of such committee, as the case may be, and such consent is filed with the minutes of proceedings of the Board or of such committee. Such filing shall be in paper form if the minutes are maintained in paper form and shall be in electronic form if the minutes are maintained in electronic form.

This Certificate of Amendment of Bylaws shall be effective as of this 9th day of March, 2023.