Signing Day Sports director disposes shares in merger

Signing Day Sports director Mason Roger disposed of his company equity in connection with a business combination.

Rhea-AI Filing Summary

Signing Day Sports director Mason Roger disposed of his company equity in connection with a business combination. On the closing date of the merger on March 16, 2026, he returned 90,919 shares of Signing Day Sports common stock and a stock option covering 500 shares to the issuer.

Under the Business Combination Agreement, for each returned Signing Day Sports share he received 0.09334 common shares of BlockchAIn Digital Infrastructure, valued at $4.60 per BlockchAIn share based on the first reported sale price after closing. His vested option was assumed by BlockchAIn and converted into an option for 47 BlockchAIn common shares exercisable at $1,594.17 per share.

Insider Trade Summary

Disposition: 91,419 shares

Disposition 2 txns

Insider Mason Roger

Role Director

Type	Security	Shares	Price	Value
Disposition	Stock Option (right to buy)	500	$0.00	$0.00
Disposition	Common Stock	90,919	$0.00	$0.00

Holdings After Transaction: Stock Option (right to buy) — 0 contracts (Direct); Common Stock — 0 shares (Direct)

Footnotes (2)

1. F1. Pursuant to the Business Combination Agreement, dated as of May 27, 2025, by and among Signing Day Sports, Inc., a Delaware corporation (the "Registrant"), One Blockchain LLC, a Delaware limited liability company, BlockchAIn Digital Infrastructure, Inc., a Delaware corporation ("BlockchAIn"), BCDI Merger Sub I Inc., a Delaware corporation, and BCDI Merger Sub II LLC, a Delaware limited liability company, as amended (the "Business Combination Agreement"), on the date of the closing (the "Closing") of the transactions contemplated by the Business Combination Agreement, or March 16, 2026 (the "Closing Date"), the reporting person received 0.09334 common shares of BlockchAIn for every share of common stock of the Registrant held by the reporting person, subject to rounding adjustments, having a market value of $4.60 per share based on the first reported sale price of the common stock of BlockchAIn on the NYSE American LLC after the Closing, which was reported on March 17, 2026.
2. F2. Pursuant to the terms of the Business Combination Agreement, on the Closing Date, the reporting person's option, which provided for vesting as to 1/12 of the shares of the Registrant's common stock subject to the option on the 9th day of each March, June, September, or December, that follows September 9, 2022, immediately became fully vested, was assumed by BlockchAIn, and was automatically converted into an option to purchase 47 common shares of BlockchAIn exercisable for $1,594.17 per share.

FAQ

What did Signing Day Sports (SGN) director Mason Roger report on this Form 4?

Director Mason Roger reported disposing of his Signing Day Sports equity back to the issuer on March 16, 2026. This included 90,919 common shares and a stock option for 500 shares, all in connection with the company’s business combination with BlockchAIn Digital Infrastructure.

How many Signing Day Sports shares did Mason Roger give up in the transaction?

Mason Roger returned 90,919 shares of Signing Day Sports common stock to the issuer. This disposition occurred on the March 16, 2026 closing of the business combination, as his holdings were exchanged under the Business Combination Agreement terms with BlockchAIn Digital Infrastructure.

What happened to Mason Roger’s Signing Day Sports stock option in the merger?

His Signing Day Sports option covering 500 shares became fully vested and was disposed of to the issuer on March 16, 2026. It was then assumed by BlockchAIn and converted into an option to purchase 47 BlockchAIn common shares at $1,594.17 per share.

What did Mason Roger receive in exchange for his Signing Day Sports shares?

For each Signing Day Sports share, he received 0.09334 BlockchAIn common shares at closing. The BlockchAIn shares were valued at $4.60 each, based on the first reported sale price after closing on the NYSE American on March 17, 2026.

Does Mason Roger still hold Signing Day Sports (SGN) shares after this Form 4?

After the March 16, 2026 transaction, his reported Signing Day Sports common stock holdings were zero. His economic interest shifted to BlockchAIn through received common shares and a converted option position following the Business Combination Agreement’s closing terms.

Was this Form 4 transaction an open-market sale of Signing Day Sports stock?

No, the filing describes a disposition to the issuer as part of a business combination. The transactions were governed by the Business Combination Agreement and involved exchanging Signing Day Sports equity for BlockchAIn shares and options, rather than open-market selling.

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Accepted by SEC EDGAR 03/18/2026 - 04:05 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
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X

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Mason Roger

(Last) (First) (Middle)

C/O SIGNING DAY SPORTS, INC.

8355 EAST HARTFORD RD., SUITE 100

(Street)

SCOTTSDALE ARIZONA 85255

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Signing Day Sports, Inc. [ SGN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/16/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/16/2026		D		90,919	D	(1)	0	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (right to buy)	$148.8	03/16/2026		D			500	(2)	09/09/2032	Common Stock	500	(2)	0	D

Explanation of Responses:

1. Pursuant to the Business Combination Agreement, dated as of May 27, 2025, by and among Signing Day Sports, Inc., a Delaware corporation (the "Registrant"), One Blockchain LLC, a Delaware limited liability company, BlockchAIn Digital Infrastructure, Inc., a Delaware corporation ("BlockchAIn"), BCDI Merger Sub I Inc., a Delaware corporation, and BCDI Merger Sub II LLC, a Delaware limited liability company, as amended (the "Business Combination Agreement"), on the date of the closing (the "Closing") of the transactions contemplated by the Business Combination Agreement, or March 16, 2026 (the "Closing Date"), the reporting person received 0.09334 common shares of BlockchAIn for every share of common stock of the Registrant held by the reporting person, subject to rounding adjustments, having a market value of $4.60 per share based on the first reported sale price of the common stock of BlockchAIn on the NYSE American LLC after the Closing, which was reported on March 17, 2026.

2. Pursuant to the terms of the Business Combination Agreement, on the Closing Date, the reporting person's option, which provided for vesting as to 1/12 of the shares of the Registrant's common stock subject to the option on the 9th day of each March, June, September, or December, that follows September 9, 2022, immediately became fully vested, was assumed by BlockchAIn, and was automatically converted into an option to purchase 47 common shares of BlockchAIn exercisable for $1,594.17 per share.

	/s/ Roger Mason Jr.	03/18/2026
	** 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 4 (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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)