Company: SLMT
Filing Date: 2025-12-03
Form Type: 6-K
Source: 0001213900-25-117568
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Company: Brera Holdings PLC
Filing Date: 2025-12-03
Form: 6-K
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<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 OF THE

SECURITIES EXCHANGE ACT OF 1934

For the month of December, 2025.

Commission File Number 001-41606

BRERA HOLDINGS PLC

(Translation of registrant’s name into English)

Connaught House, 5th Floor

One Burlington Road

Dublin 4

D04 C5Y6

Ireland

(Address of principal executive office)</div>

Indicate by check mark whether the registrant files or will file annual
reports under cover of Form 20-F or Form 40-F:

<div align='center'>Form 20-F ☒
Form 40-F ☐

INCORPORATION BY REFERENCE</div>

This
Report on Form 6-K shall be deemed to be incorporated by reference into the shelf registration statement on Form F-3 (Registration
Number 333-276870) of Brera Holdings PLC, operating under the name Solmate Infrastructure (the “Company”) (NASDAQ: SLMT),
a Solana-based crypto infrastructure company, filed by the Company with the U.S. Securities and Exchange Commission (the “SEC”)
on February 5, 2024 and declared effective by the SEC on February 13, 2024 (the “Shelf Registration Statement”), and into
each prospectus or prospectus supplement outstanding under the Shelf Registration Statement, and the registration statement on Form F-3ASR
(Registration Number 333-291657) of the Company, filed by the Company with the SEC on November 19, 2025 (the “Resale Registration
Statement”), and into each prospectus or prospectus supplement outstanding under the Resale Registration Statement, to the extent
not superseded by documents or reports subsequently filed or furnished by the Company under the Securities Act of 1933, as amended, or
the Securities Exchange Act of 1934, as amended.

<div align='center'>1

INFORMATION CONTAINED IN THIS FORM 6-K REPORT</div>

Resignation of Chief Financial Officer

On November 26, 2025, Dr. Fabio Scacciavillani
gave written notice of his resignation as the Chief Financial Officer of the Company, effective as of December