# EDGAR Filing Document

**Accession Number:** 0001898474
**File Stem:** 0001213900-26-028475
**Filing Date:** 2026-3
**Character Count:** 12063
**Document Hash:** 6e78cef3687ca694eff912d01418d841
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-26-028475.hdr.sgml**: 20260317

**ACCESSION NUMBER**: 0001213900-26-028475

**CONFORMED SUBMISSION TYPE**: POS AM

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260317

**DATE AS OF CHANGE**: 20260316

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Signing Day Sports, Inc.
- **CENTRAL INDEX KEY:** 0001898474
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-COMPUTER PROCESSING & DATA PREPARATION [7374]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 872792157
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** POS AM
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-289965
- **FILM NUMBER:** 26758140

**BUSINESS ADDRESS:**
- **STREET 1:** 8355 EAST HARTFORD RD., STE. 100
- **CITY:** SCOTTSDALE
- **STATE:** AZ
- **ZIP:** 85255
- **BUSINESS PHONE:** 602-481-7440

**MAIL ADDRESS:**
- **STREET 1:** 8355 EAST HARTFORD RD., STE. 100
- **CITY:** SCOTTSDALE
- **STATE:** AZ
- **ZIP:** 85255

As filed with the Securities and Exchange Commission on March 16, 2026

**Registration No. 333-271951**

**Registration No. 333-276717**

**Registration No. 333-280700**

**Registration No. 333-281322**

**Registration No. 333-289965**

**Registration No. 333-292569**

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**WASHINGTON, D.C. 20549**

**Post-Effective Amendment No. 2 to Form S-1 Registration Statement No. 333-271951**

**Post-Effective Amendment No. 2 to Form S-1 Registration Statement No. 333-276717**

**Post-Effective Amendment No. 1 to Form S-1 Registration Statement No. 333-280700**

**Post-Effective Amendment No. 1 to Form S-1 Registration Statement No. 333-281322<br> Post-Effective Amendment No. 1 to Form S-1 Registration Statement No. 333-289965<br> Post-Effective Amendment No. 1 to Form S-1 Registration Statement No. 333-292569<br> UNDER<br> THE SECURITIES ACT OF 1933**

**Signing Day Sports, Inc.**

**(Exact name of registrant as specified in its charter)**

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;**Delaware** | &nbsp;&nbsp;**7389** | &nbsp;&nbsp;**87-2792157** |
| &nbsp;&nbsp;(State or other jurisdiction of<br> incorporation or organization) | &nbsp;&nbsp;(Primary Standard Industrial<br> Classification Code Number) | &nbsp;&nbsp;(I.R.S. Employer<br> Identification Number) |

---

1540 Broadway, Ste 1010

New York, NY 10036

(917) 558-3563

(Address, including zip code, and telephone number, including area code, of registrant's principal executive offices)

Jerry Tang

Chief Executive Officer

1540 Broadway, Ste 1010

New York, NY 10036

(917) 558-3563

(Names, address, including zip code, and telephone number, including area code, of agent for service)

***Copies to:***

Mitchell S. Nussbaum, Esq.

Tahra Wright, Esq.

Loeb & Loeb LLP

345 Park Avenue

New York, NY 10154

(212) 407-4000

**Approximate date of commencement of proposed sale to the public:** Not applicable.

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933 check the following box. ☐

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer ☐ Accelerated filer ☐ <br> Non-accelerated filer ☒ Smaller reporting company ☒ <br> Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for comply with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of Securities Act. ☐

**DEREGISTRATION OF SECURITIES**

These Post-Effective Amendments (these "Post-Effective Amendments") relate to the following Registration Statements on Form S-1 (collectively, the "Registration Statements") filed by Signing Day Sports, Inc., a Delaware corporation (the "Registrant"), with the Securities and Exchange Commission (the "SEC"):

&nbsp;&nbsp;&nbsp;&nbsp;1. Registration
 Statement on [Form S-1](https://www.sec.gov/Archives/edgar/data/1898474/000121390023039987/ea178536-s1_signingday.htm) (File No. 333-271951),
 originally filed with the SEC on May 15, 2023, and declared effective by the SEC on November
 13, 2023, registering (a) the Registrant's offering of (i) 25,000 shares of the Registrant's
 common stock, par value $0.0001 per share ("common stock"), (ii) warrants to
 purchase 2,013 shares of common stock, and (iii) 2,013 shares of common stock issuable
 upon exercise of warrants, and (b) the offering of up to 46,154 shares of common stock by
 certain selling stockholders named therein, consisting of (i) 14,507 shares of common stock;
 (ii) 7,673 shares of common stock issuable upon conversion of 6% convertible unsecured promissory
 notes; (iii) 4,384 shares of common stock issuable upon conversion of 8% convertible unsecured
 promissory notes; and (iv) 19,590 shares of common stock issuable upon exercise of warrants;
 as amended by [Post-Effective Amendment No. 1](https://www.sec.gov/Archives/edgar/data/0001898474/000121390024030419/ea0203088-posam_signingday.htm) , originally filed with the SEC on April 4, 2024, and declared effective
 by the SEC on April 10, 2024, registering the Registrant's offering of (i) warrants
 to purchase 1,750 shares of common stock and (ii) 1,750 shares of common stock underlying
 warrants;

&nbsp;&nbsp;&nbsp;&nbsp;2. Registration
 Statement on [Form S-1](https://www.sec.gov/Archives/edgar/data/1898474/000121390024007020/ea192044-s1_signingday.htm) (File No. 333-276717),
 originally filed with the SEC on January 26, 2024, and declared effective by the SEC on February
 14, 2024, registering the offering of up to 97,107 shares of common stock by the selling
 stockholder named therein, as amended by [Post-Effective Amendment No. 1](https://www.sec.gov/Archives/edgar/data/0001898474/000121390024030420/ea0203080-posam_signingday.htm) , originally filed with the SEC on
 April 4, 2024, and declared effective by the SEC on April 10, 2024, registering the offering
 of up to 4,511,391 shares of common stock by the selling stockholder named therein;

&nbsp;&nbsp;&nbsp;&nbsp;3. Registration
 Statement on [Form S-1](http://www.sec.gov/Archives/edgar/data/0001898474/000121390024059235/ea0208881-s1_signing.htm) (File No. 333-280700),
 originally filed with the SEC on July 5, 2024, and declared effective by the SEC on July
 18, 2024, registering the offering of up to 138,418 shares of common stock by the selling
 stockholders named therein, consisting of (i) 7,086 shares of common stock, (ii) 79,002 shares
 of common stock issuable upon conversion of senior secured promissory notes, and (iii) 52,330
 shares of common stock issuable upon exercise of warrants;

&nbsp;&nbsp;&nbsp;&nbsp;4. Registration
 Statement on [Form S-1](https://www.sec.gov/Archives/edgar/data/1898474/000121390024071537/ea0211855-s1a1_signing.htm) (File No. 333-281322),
 originally filed with the SEC on August 7, 2024, and declared effective by the SEC on August
 29, 2024, registering <u>the</u> offering of up to 73,764 shares of common stock by the selling
 stockholders named therein, consisting of (i) 14,248 shares of common stock, (ii) 59,029
 shares of common stock issuable upon exercise of pre-funded warrants, and (iii) 487 shares
 of common stock issuable upon exercise of a warrant;

&nbsp;&nbsp;&nbsp;&nbsp;5. Registration
 Statement on [Form S-3](https://www.sec.gov/Archives/edgar/data/1898474/000121390025082692/ea0255150-s3_signing.htm) filed with the SEC on August 29, 2025, as amended on Pre-Effective
 Amendment on Form S-1 to Form S-3 on September 25, 2025 (File No. [333-289965](https://www.sec.gov/Archives/edgar/data/0001898474/000121390025091745/ea0257314-s1a1_signing.htm)),
 and declared effective by the SEC on September 30, 2025, registering the offering of up to
 1,297,322 shares of common stock by the selling stockholder named therein; and

&nbsp;&nbsp;&nbsp;&nbsp;6. Registration
 Statement on [Form S-1](https://www.sec.gov/Archives/edgar/data/1898474/000121390026000719/ea0270528-s1_signing.htm) (File No. 333-292569),
 originally filed with the SEC on January 5, 2026, and declared effective by the SEC on January
 13, 2026, registering the Registrant's offering of (a) 9,483,500 shares of common stock,
 (b) warrants to purchase up to 14,225,250 shares of common stock, (c) representative's
 warrants to purchase up to 474,175 shares of common stock, and (d) up to 14,699,425 shares
 of common stock issuable upon exercise of warrants and representative's warrants.

All share numbers set forth above reflect a one-for-forty-eight (1-for-48) reverse stock split of the outstanding common stock which became effective on November 16, 2024.

Pursuant to the Business Combination Agreement, dated as of May 27, 2025, by and among the Registrant, One Blockchain LLC, a Delaware limited liability company ("One Blockchain"), BlockchAIn Digital Infrastructure, Inc., a Delaware corporation ("BlockchAIn"), BCDI Merger Sub I Inc., a Delaware corporation and a wholly-owned subsidiary of BlockchAIn ("Merger Sub I"), and BCDI Merger Sub II LLC, a Delaware limited liability company and a wholly-owned subsidiary of BlockchAIn ("Merger Sub II"), as amended by Amendment No. 1 to the Business Combination Agreement, dated as of November 10, 2025, between the Registrant and One Blockchain, as amended by Amendment No. 2 to the Business Combination Agreement, dated as of December 21, 2025, among the Registrant, One Blockchain, BlockchAIn, Merger Sub I, and Merger Sub II (as amended, the "Business Combination Agreement"), among other things, Merger Sub I merged with and into the Registrant, with the Registrant continuing as the surviving corporation and a direct wholly-owned subsidiary of BlockchAIn, and Merger Sub II merged with and into One Blockchain, with One Blockchain continuing as the surviving limited liability company and a direct wholly-owned subsidiary of BlockchAIn. As a result of the transactions contemplated by the Business Combination Agreement, the Registrant has terminated all offerings of its securities pursuant to the Registration Statements and hereby removes and withdraws from registration all securities registered pursuant to the Registration Statements that remain unsold as of the date hereof. The Registration Statements are hereby amended, as appropriate, to reflect the deregistration of such securities.

**SIGNATURES**

Pursuant to the requirements of the Securities Act of 1933, the registrant has duly caused these Post-Effective Amendments to be signed on its behalf by the undersigned, thereunto duly authorized, in New York, New York, on March 16, 2026.

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| | |
|:---|:---|
| **Signing Day Sports, Inc.** | **Signing Day Sports, Inc.** |
| /s/ Jerry Tang | /s/ Jerry Tang |
| Name: | Jerry Tang |
| Title: | President |

---

Pursuant to Rule 478 of the Securities Act of 1933, as amended, no other person is required to sign these Post-Effective Amendments.