Director swaps Signing Day Sports (SGN) shares for BlockchAIn stock

Rhea-AI Filing Summary

Signing Day Sports director Peter F. Borish fully exited his common stock position through a share exchange tied to a business combination. On March 16, 2026, he disposed of 176,232 shares of Signing Day Sports, Inc. common stock back to the issuer and received common shares of BlockchAIn Digital Infrastructure, Inc. under a Business Combination Agreement. The exchange ratio granted 0.09334 BlockchAIn common share for every Signing Day Sports share held, with BlockchAIn shares valued at $4.60 each based on the first reported post-closing sale price. Following the transaction, Borish directly held zero Signing Day Sports shares.

Insights

Equity compensation and M&A structure analyst

Director exchanged all Signing Day Sports shares for BlockchAIn stock in a structured merger transaction.

The filing shows director Peter F. Borish disposed of 176,232 Signing Day Sports common shares in a transaction coded "D" as a disposition to the issuer. This occurred at the closing of a Business Combination Agreement, indicating a corporate reorganization rather than an open-market trade.

Under that agreement, each Signing Day Sports share converted into 0.09334 BlockchAIn Digital Infrastructure, Inc. common share, with BlockchAIn stock valued at $4.60 per share based on the first reported post-closing sale price on March 17, 2026. This implies the director’s economic exposure shifted from Signing Day Sports equity into BlockchAIn equity.

Because the transaction is a structured exchange with no cash sale price and results in zero Signing Day Sports shares remaining, it primarily reflects completion of the combination terms for this holder. Future company filings may provide additional detail on how widely this exchange applied across other shareholders.

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

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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^*

Borish Peter F

(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		176,232	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

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.

	/s/ Peter Borish	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)

FAQ

What did Signing Day Sports (SGN) director Peter F. Borish report in this Form 4?

He reported a disposition to the issuer of 176,232 shares of Signing Day Sports common stock on March 16, 2026. This transaction transferred his entire directly held position as part of a closing business combination involving BlockchAIn Digital Infrastructure, Inc.

How many Signing Day Sports (SGN) shares did Peter F. Borish dispose of?

He disposed of 176,232 shares of Signing Day Sports common stock in a single non-derivative transaction. The Form 4 shows this as a code "D" disposition to the issuer, leaving him with 0 shares of Signing Day Sports common stock afterward.

Was cash involved in Peter F. Borish’s Signing Day Sports (SGN) transaction?

The reported transaction shows a price of $0.0000 per share, indicating no direct cash sale. Instead, his shares were exchanged for BlockchAIn Digital Infrastructure common stock pursuant to a Business Combination Agreement effective at closing on March 16, 2026.

What did Peter F. Borish receive for his Signing Day Sports (SGN) shares?

He received 0.09334 BlockchAIn common share for every Signing Day Sports share he held. The BlockchAIn shares were valued at $4.60 per share, based on the first reported sale price on the NYSE American after the Closing, reported on March 17, 2026.

Does Peter F. Borish still own Signing Day Sports (SGN) stock after this Form 4?

According to the Form 4, his total shares following the transaction are 0. The disposition to the issuer, tied to the business combination closing, eliminated his direct Signing Day Sports common stock holdings and replaced them with BlockchAIn Digital Infrastructure shares.

What agreement governed the share exchange reported for Signing Day Sports (SGN)?

The exchange followed a Business Combination Agreement dated May 27, 2025, among Signing Day Sports, One Blockchain LLC, BlockchAIn Digital Infrastructure, and related merger subsidiaries. The share conversion occurred on the Closing Date of March 16, 2026 as the agreement’s terms took effect.