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Dechert LLP

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August 12, 2026

UBS Series Funds

1285 Avenue of the Americas

New York, NY 10019

 

  Re:

UBS Series Funds

Post Effective Amendment No. 84 to the Registration Statement

on Form N-1A (“Registration Statement”)

Ladies and Gentlemen:

We have acted as counsel for UBS Series Funds (the “Trust”), a Delaware statutory trust, in connection with the Registration Statement relating to the issuance and sale by the Trust of an indefinite number of its authorized shares of beneficial interest of UBS Liquid Reserves Fund (“Shares”) under the Securities Act of 1933, as amended (“1933 Act”), and under the Investment Company Act of 1940, as amended.

This opinion is limited to the Delaware Statutory Trust Act statute, and we express no opinion with respect to the laws of any other jurisdiction or to any other laws of the State of Delaware. Further, we express no opinion as to compliance with any state or federal securities laws, including the securities laws of the State of Delaware.

In connection with the opinions set forth herein, we have examined the following documents: the Trust’s Trust Instrument and By-Laws, each as amended to date, and such other Trust records, certificates, resolutions, documents and statutes that we have deemed relevant in order to render the opinions expressed herein. In addition, we have reviewed and relied upon the certificate referred to below issued by the Delaware Secretary of State.

In rendering this opinion we have assumed, without independent verification, (i) the due authority of all individuals signing in representative capacities and the genuineness of signatures; (ii) the authenticity, completeness and continued effectiveness of all documents or copies furnished to us; (iii) that the facts contained in the instruments and certificates or statements of public officials, officers and representatives of the Trust on which we have relied for the purposes of this opinion are true and correct; and (iv) that no amendments, agreements, resolutions or actions have been approved, executed or adopted which would limit, supersede or modify the items described above.

Based upon the foregoing, we are of the opinion that the Shares proposed to be sold pursuant to the Registration Statement have been duly authorized for issuance and, when issued and delivered against payment therefor in accordance with the terms, conditions, requirements and procedures described in the Registration Statement, will be validly issued, fully paid and non-assessable beneficial interests in such series and class.


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In rendering this opinion, insofar as it relates to the valid existence of the Trust, we have relied solely on a certificate of the Secretary of State of the State of Delaware, dated as of August 10, 2026, and this opinion is limited accordingly and is rendered as of the date of such certificate.

We hereby consent to the filing of this opinion as an exhibit to the Registration Statement, to be filed with the Securities and Exchange Commission, and to the use of our name in the Trust’s Statement of Additional Information of the Registration Statement to be dated on or about August 12, 2026 and in any revised or amended versions thereof, under the caption “Counsel” unless and until we revoke such consent. In giving such consent, however, we do not admit that we are within the category of persons whose consent is required by Section 7 of the 1933 Act and the rules and regulations thereunder.

Very truly yours,

/s/ Dechert LLP

Dechert LLP