Daniel D. Nelson - 16 Mar 2026 Form 4 Insider Report for Signing Day Sports, Inc. (SGN)

Reporting relationship: CEO and Chairman, Director
Issuer ticker: SGN
Reported as of: 16 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 18 Mar 2026, 16:05:29 UTC
Prior SEC filing: 13 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Daniel D. Nelson

Key filing fact

Daniel D. Nelson filed Form 4 for Signing Day Sports, Inc. (SGN) on 18 Mar 2026.

Key facts

This page summarizes Daniel D. Nelson's Form 4 filing for Signing Day Sports, Inc. (SGN).
5 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 18 Mar 2026, 16:05.

Change

Previous filing in this sequence was filed on 13 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001972305 Primary reporting owner

Nelson Daniel D

Relationship: CEO and Chairman, Director
Address: C/O SIGNING DAY SPORTS, INC., 8355 EAST HARTFORD RD., SUITE 100, SCOTTSDALE
Signature: /s/ Daniel D. Nelson
Signature date: 18 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

SGN transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -402,042
Change %: -100%
Price
Shares after: 0
Date: 16 Mar 2026
Ownership: Direct
Footnotes: F1

SGN transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -31,247
Change %: -100%
Price
Shares after: 0
Date: 16 Mar 2026
Ownership: By The Nelson Revocable Living Trust
Footnotes: F1, F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

SGN transaction Derivative

Stock Option (right to buy)

Disposed to Issuer

Transaction value
Shares: -625
Change %: -100%
Price
Shares after: 0
Date: 16 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 625
Exercise price: $148.80
Footnotes: F3

SGN transaction Derivative

Stock Option (right to buy)

Disposed to Issuer

Transaction value
Shares: -105
Change %: -100%
Price
Shares after: 0
Date: 16 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 105
Exercise price: $148.80
Footnotes: F4

SGN transaction Derivative

Stock Option (right to buy)

Disposed to Issuer

Transaction value
Shares: -2,084
Change %: -100%
Price
Shares after: 0
Date: 16 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 2,084
Exercise price: $108.00
Footnotes: F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

Daniel D. Nelson is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 5 footnotes

Footnote 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.

Footnote F2

The reporting person is a co-trustee of The Nelson Revocable Living Trust, an Arizona trust provided for by the Nelson Revocable Living Trust Agreement established on March 9, 1999 and amended and restated on November 21, 2005. The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein.

Footnote F3

Pursuant to the terms of the Business Combination Agreement, on the Closing Date, the reporting person's option was assumed by BlockchAIn, and was automatically converted into an option to purchase 59 common shares of BlockchAIn exercisable for $1,594.17 per share.

Footnote F4

Pursuant to the terms of the Business Combination Agreement, on the Closing Date, the reporting person's option was assumed by BlockchAIn, and was automatically converted into an option to purchase 10 common shares of BlockchAIn exercisable for $1,594.17 per share.

Footnote F5

Pursuant to the terms of the Business Combination Agreement, on the Closing Date, the reporting person's option was assumed by BlockchAIn, and was automatically converted into an option to purchase 195 common shares of BlockchAIn exercisable for $1,157.06 per share.