FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person * Liu Suying	2. Date of Event Requiring Statement (MM/DD/YYYY) 4/29/2026	3. Issuer Name and Ticker or Trading Symbol Mountain Crest Acquisition 6 Corp. [MCAH]
(Last)        (First)        (Middle) C/O MOUNTAIN CREST ACQUISITION 6 CORP., 524 BROADWAY, 11TH FLOOR,	4. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director                          ___X___ 10% Owner ___X___ Officer (give title below)        _____ Other (specify below) CEO and CFO /
(Street) NEW YORK  NEW YORK  10012       (City)              (State)              (Zip/Postal Code)	5. If Amendment, Date Original Filed(MM/DD/YYYY)	6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person
UNITED STATES
(Country)

Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Ordinary Shares	2,957,143	I	See Footnote (1)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

(1)

Consists of 2,957,143 shares owned by Mountain Crest Holdings 6 LLC (the "Sponsor"). Dr. Suying Liu controls Mountain Crest Holdings 6 LLC. As such, he may be deemed to have or share beneficial ownership of the ordinary shares held directly by Mountain Crest Holdings 6 LLC. Suying Liu disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Liu Suying C/O MOUNTAIN CREST ACQUISITION 6 CORP., 524 BROADWAY, 11TH FLOOR, NEW YORK NEW YORK 10012 UNITED STATES	X	X	CEO and CFO

Signatures
/s/ Suying Liu		4/29/2026
**Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note:	File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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* Form 3: SEC 1473 (03-26).