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BlockchAIn Digital Infrastructure (AIB) director awarded shares and options in SGN merger

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

BlockchAIn Digital Infrastructure, Inc. director Nelson Daniel D reported equity grants and option conversions tied to the closing of a Business Combination Agreement with Signing Day Sports, Inc. On March 16, 2026, he received common stock and replacement stock options in BlockchAIn instead of prior SGN awards.

The filing shows three employee stock options converted into options to buy 59, 10, and 195 BlockchAIn common shares at exercise prices of $1,594.17 and $1,157.06 per share. It also reports grants or conversions of 37,527 common shares held directly and 2,917 shares held indirectly by The Nelson Revocable Living Trust, for which he disclaims beneficial ownership beyond his pecuniary interest.

Positive

  • None.

Negative

  • None.
Insider Nelson Daniel D
Role Director
Type Security Shares Price Value
Grant/Award Stock Option (right to buy) 59 $0.00 --
Grant/Award Stock Option (right to buy) 10 $0.00 --
Grant/Award Stock Option (right to buy) 195 $0.00 --
Grant/Award Common Stock 37,527 $0.00 --
Grant/Award Common Stock 2,917 $0.00 --
Holdings After Transaction: Stock Option (right to buy) — 59 shares (Direct); Common Stock — 37,527 shares (Direct); Common Stock — 2,917 shares (Indirect, By The Nelson Revocable Living Trust)
Footnotes (1)
  1. Pursuant to the Business Combination Agreement, dated as of May 27, 2025, by and among Signing Day Sports, Inc., a Delaware corporation ("SGN"), 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 reporting person received 0.09334 common shares of BlockchAIn for every share of common stock of SGN held by the reporting person, subject to rounding adjustments. The last reported sale price of SGN common stock after the Closing was $0.54 per share, as reported on March 16, 2026. The first reported sale price after the Closing of BlockchAIn's common stock was $4.60 per share, as reported on March 17, 2026. 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. Pursuant to the terms of the Business Combination Agreement, on the date of the Closing, the reporting person's employee stock option to acquire 625 shares of SGN common stock for $148.80 per share was assumed by BlockchAIn and automatically converted into an option to purchase 59 common shares of BlockchAIn exercisable for $1,594.17 per share. Pursuant to the terms of the Business Combination Agreement, on the date of the Closing, the reporting person's employee stock option to acquire 105 shares of SGN common stock for $148.80 per share was assumed by BlockchAIn and automatically converted into an option to purchase 10 common shares of BlockchAIn exercisable for $1,594.17 per share. Pursuant to the terms of the Business Combination Agreement, on the date of the Closing, the reporting person's employee stock option to acquire 2,084 shares of SGN common stock for $108.00 per share was assumed by BlockchAIn and automatically converted into an option to purchase 195 common shares of BlockchAIn exercisable for $1,157.06 per share.
SEC Form 4
FORM 4UNITED 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
Estimated average burden
hours per response:0.5
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*
Nelson Daniel D

(Last)(First)(Middle)
1540 BROADWAY, STE 1010

(Street)
NEW YORK NEW YORK 10036

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
BlockchAIn Digital Infrastructure, Inc. [ AIB ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% 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)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock03/16/2026A37,527A(1)37,527D
Common Stock03/16/2026A2,917A(1)2,917IBy The Nelson Revocable Living Trust(2)
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (right to buy)$1,594.1703/16/2026A5903/16/202609/28/2032Common Stock59(3)59D
Stock Option (right to buy)$1,594.1703/16/2026A1003/16/202609/28/2032Common Stock10(4)10D
Stock Option (right to buy)$1,157.0603/16/2026A19503/16/202611/21/2033Common Stock195(5)195D
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 ("SGN"), 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 reporting person received 0.09334 common shares of BlockchAIn for every share of common stock of SGN held by the reporting person, subject to rounding adjustments. The last reported sale price of SGN common stock after the Closing was $0.54 per share, as reported on March 16, 2026. The first reported sale price after the Closing of BlockchAIn's common stock was $4.60 per share, as reported on March 17, 2026.
2. 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.
3. Pursuant to the terms of the Business Combination Agreement, on the date of the Closing, the reporting person's employee stock option to acquire 625 shares of SGN common stock for $148.80 per share was assumed by BlockchAIn and automatically converted into an option to purchase 59 common shares of BlockchAIn exercisable for $1,594.17 per share.
4. Pursuant to the terms of the Business Combination Agreement, on the date of the Closing, the reporting person's employee stock option to acquire 105 shares of SGN common stock for $148.80 per share was assumed by BlockchAIn and automatically converted into an option to purchase 10 common shares of BlockchAIn exercisable for $1,594.17 per share.
5. Pursuant to the terms of the Business Combination Agreement, on the date of the Closing, the reporting person's employee stock option to acquire 2,084 shares of SGN common stock for $108.00 per share was assumed by BlockchAIn and automatically converted into an option to purchase 195 common shares of BlockchAIn exercisable for $1,157.06 per share.
/s/ Daniel D. Nelson03/18/2026
** Signature of Reporting PersonDate
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 insider transactions did Nelson Daniel D report for BlockchAIn Digital Infrastructure (AIB)?

Nelson Daniel D reported equity acquisitions, not open-market trades. He received BlockchAIn common stock and replacement stock options on March 16, 2026, in connection with a Business Combination Agreement with Signing Day Sports, Inc., converting prior SGN equity awards into BlockchAIn instruments.

How many BlockchAIn common shares did Nelson Daniel D acquire directly in this Form 4?

The Form 4 shows an acquisition of 37,527 BlockchAIn common shares held directly. These shares reflect grants or conversions at a transaction price per share of zero, arising from the closing of the Business Combination Agreement with Signing Day Sports, Inc. on March 16, 2026.

What indirect holdings did The Nelson Revocable Living Trust receive in BlockchAIn (AIB)?

The Nelson Revocable Living Trust received 2,917 BlockchAIn common shares on March 16, 2026. Nelson Daniel D is a co‑trustee and disclaims beneficial ownership of these securities except to the extent of his pecuniary interest, meaning economic benefit he may derive from the trust holdings.

How were Nelson Daniel D’s SGN stock options converted in the BlockchAIn business combination?

Existing employee stock options in Signing Day Sports, Inc. were assumed by BlockchAIn and automatically converted. They became options to purchase 59, 10, and 195 BlockchAIn shares, exercisable at $1,594.17 and $1,157.06 per share, preserving his economic position under the new entity.

What exchange ratio applied to SGN shares in the BlockchAIn Digital Infrastructure merger?

At closing on March 16, 2026, each share of Signing Day Sports, Inc. common stock held by the reporting person was exchanged for 0.09334 BlockchAIn common shares, subject to rounding. This ratio determined how many BlockchAIn shares he received for his prior SGN holdings.

What were the reported post-closing stock prices for SGN and BlockchAIn?

After the closing, the last reported sale price of SGN common stock was $0.54 per share on March 16, 2026. The first reported sale price of BlockchAIn’s common stock was $4.60 per share on March 17, 2026, illustrating pricing for each security around the transaction.