| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Nelson Daniel D | CEO and Chairman, Director | C/O SIGNING DAY SPORTS, INC., 8355 EAST HARTFORD RD., SUITE 100, SCOTTSDALE | /s/ Daniel D. Nelson | 18 Mar 2026 | 0001972305 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | SGN | Common Stock | Disposed to Issuer | -402,042 | -100% | 0 | 16 Mar 2026 | Direct | F1 | ||
| transaction | SGN | Common Stock | Disposed to Issuer | -31,247 | -100% | 0 | 16 Mar 2026 | By The Nelson Revocable Living Trust | F1, F2 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | SGN | Stock Option (right to buy) | Disposed to Issuer | -625 | -100% | 0 | 16 Mar 2026 | Common Stock | 625 | $148.80 | Direct | F3 | ||
| transaction | SGN | Stock Option (right to buy) | Disposed to Issuer | -105 | -100% | 0 | 16 Mar 2026 | Common Stock | 105 | $148.80 | Direct | F4 | ||
| transaction | SGN | Stock Option (right to buy) | Disposed to Issuer | -2,084 | -100% | 0 | 16 Mar 2026 | Common Stock | 2,084 | $108.00 | Direct | F5 |
Daniel D. Nelson is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.
| Id | Content |
|---|---|
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |