# EDGAR Filing Document

**Accession Number:** 0001760624
**File Stem:** 0000950103-26-006879
**Filing Date:** 2026-5
**Character Count:** 16465
**Document Hash:** f396a78c8adfdbf16b5061cb7cc67d84
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000950103-26-006879.hdr.sgml**: 20260505

**ACCESSION NUMBER**: 0000950103-26-006879

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260505

**DATE AS OF CHANGE**: 20260505

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** AST SpaceMobile, Inc.
- **CENTRAL INDEX KEY:** 0001780312
- **STANDARD INDUSTRIAL CLASSIFICATION:** COMMUNICATION SERVICES, NEC [4899]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-91129
- **FILM NUMBER:** 26945398

**BUSINESS ADDRESS:**
- **STREET 1:** MIDLAND INTL. AIR & SPACE PORT
- **STREET 2:** 2901 ENTERPRISE LANE
- **CITY:** MIDLAND
- **STATE:** TX
- **ZIP:** 79706
- **BUSINESS PHONE:** 432-276-3966

**MAIL ADDRESS:**
- **STREET 1:** MIDLAND INTL. AIR & SPACE PORT
- **STREET 2:** 2901 ENTERPRISE LANE
- **CITY:** MIDLAND
- **STATE:** TX
- **ZIP:** 79706

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** New Providence Acquisition Corp.
- **DATE OF NAME CHANGE:** 20190620
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Mikitani Hiroshi
- **CENTRAL INDEX KEY:** 0001760624

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** C/O RAKUTEN MOBILE, INC.
- **STREET 2:** 1-14-1 TAMAGAWA, SETAGAYA-KU
- **CITY:** TOKYO
- **PROVINCE COUNTRY:** M0

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 4)**

**AST SpaceMobile, Inc.**

*(Name of Issuer)*

**Class A Common Stock**

*(Title of Class of Securities)*

**—**

*(CUSIP Number)*

**Hiroshi Mikitani**<br>c/o Rakuten Mobile, Inc.<br>1-14-1 Tamagawa, Setagaya-Ku<br>Tokyo M0 158-0094<br>81-50-5581-6910

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**05/01/2026**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Rakuten Mobile, Inc.** | Name of reporting person<br>**Rakuten Mobile, Inc.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**M0** | Citizenship or place of organization<br>**M0** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**15510078.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**15510078.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**15510078.00** | Aggregate amount beneficially owned by each reporting person<br>**15510078.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**5.3%** | Percent of class represented by amount in Row (11)<br>**5.3%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

**Comment for Reporting Person:** (1) Comprised of 15,510,078 shares of Class A Common Stock of the Issuer. As discussed in Item 2 of this Schedule 13D/A, the other Stockholder Parties (as defined herein) are not included as reporting persons in this Schedule 13D/A, and the Reporting Persons expressly disclaim beneficial ownership of the shares of Class A Common Stock held by the other Stockholder Parties.

(2) Calculations of the percentage of the shares of Class A Common Stock beneficially owned is based on 292,637,039 shares of Class A Common Stock outstanding as of February 26, 2026, as reported in the Annual Report on Form 10-K for the fiscal year ended December 31, 2025, filed by the Issuer with the SEC on March 2, 2026 (the "Form 10-K").

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Hiroshi Mikitani** | Name of reporting person<br>**Hiroshi Mikitani** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**M0** | Citizenship or place of organization<br>**M0** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**15510078.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**15510078.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**15510078.00** | Aggregate amount beneficially owned by each reporting person<br>**15510078.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**5.3%** | Percent of class represented by amount in Row (11)<br>**5.3%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** (1) Comprised of 15,510,078 of Class A Common Stock of the Issuer. Hiroshi Mikitani ("Mr. Mikitani") is the founder, Chairman and Chief Executive Officer of Rakuten Group, Inc. ("Rakuten Group") and Rakuten Mobile, Inc. ("Rakuten Mobile") and has voting and investment discretion with respect to the securities held of record by Rakuten Mobile. By reason of the provisions of Rule 13d-3 under the Securities Exchange Act of 1934, as amended, Mr. Mikitani may be deemed to be the beneficial owner of the securities beneficially owned by Rakuten Mobile. Mr. Mikitani hereby disclaims beneficial ownership of all such securities, except to the extent of any indirect pecuniary interest therein.

As discussed in Item 2 of this Schedule 13D, the other Stockholder Parties (as defined herein) are not included as reporting persons in this Schedule 13D, and the Reporting Persons expressly disclaim beneficial ownership of the shares of Class A Common Stock held by the other Stockholder Parties.

(2) Calculations of the percentage of the shares of Class A Common Stock beneficially owned is based on 292,637,039 shares of Class A Common Stock outstanding as of February 26, 2026, as reported in the Annual Report on Form 10-K.

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Rakuten Group, Inc.** | Name of reporting person<br>**Rakuten Group, Inc.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**M0** | Citizenship or place of organization<br>**M0** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**15510078.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**15510078.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**15510078.00** | Aggregate amount beneficially owned by each reporting person<br>**15510078.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**5.3%** | Percent of class represented by amount in Row (11)<br>**5.3%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

**Comment for Reporting Person:** (1) Comprised of 15,510,078 of Class A Common Stock of the Issuer. Rakuten Mobile is a wholly-owned subsidiary of Rakuten Group. By reason of the provisions of Rule 13d-3 under the Securities Exchange Act of 1934, as amended, Rakuten Group may be deemed to be the beneficial owner of the securities beneficially owned by Rakuten Mobile. Rakuten Group hereby disclaims beneficial ownership of all such securities, except to the extent of any indirect pecuniary interest therein.

As discussed in Item 2 of this Schedule 13D, the other Stockholder Parties (as defined herein) are not included as reporting persons in this Schedule 13D, and the Reporting Persons expressly disclaim beneficial ownership of the shares of Class A Common Stock held by the other Stockholder Parties.

(2) Calculations of the percentage of the shares of Class A Common Stock beneficially owned is based on 292,637,039 shares of Class A Common Stock outstanding as of February 26, 2026, as reported in the Annual Report on Form 10-K.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Class A Common Stock

**(b) Name of Issuer:**
AST SpaceMobile, Inc.

**(c) Address of Issuer's Principal Executive Offices:**
c/o Rakuten Mobile, Inc., 1-14-1 Tamagawa, Setagaya-Ku, Tokyo, M0, 158-0094

This Schedule 13D/A (this "Schedule 13D/A") amends and supplements the Schedule 13D filed by the Reporting Persons (as defined below) on April 6, 2021 (the "Original Schedule 13D"), as amended by Amendment No.1 filed on October 10, 2024 ("Amendment No. 1"), as amended by Amendment No. 2 filed on April 16, 2026 ("Amendment No. 2") and as amended by Amendment No. 3 filed on April 24, 2026 ("Amendment No. 3") (the Original Schedule 13D, as amended and supplemented by Amendment No. 1, Amendment No. 2, Amendment No. 3 and this Schedule 13D/A, the "Schedule 13D") with respect to the Class A Common Stock. Capitalized terms used in this Schedule 13D/A and not defined herein shall have the same meanings ascribed to them in the Original Schedule 13D.

**Item 4. Purpose of Transaction**

Item 4 of the Original Schedule 13D is hereby amended to add the following:

The Trading Plan has been completed. All Sale Shares have been sold pursuant to the Trading Plan.

**Item 5. Interest in Securities of the Issuer**

**(a)**
(a) Item 5 of the Original Schedule 13D is hereby amended to add the following:

Mr. Mikitani is the founder, Chairman and Chief Executive Officer of Rakuten Group and Rakuten Mobile and has voting and investment discretion with respect to the securities held of record by Rakuten Mobile. By reason of the provisions of Rule 13d-3 under the Securities Exchange Act of 1934, as amended, Mr. Mikitani may be deemed to be the beneficial owner of the securities beneficially owned by Rakuten Mobile. Mr. Mikitani hereby disclaims beneficial ownership of all such securities, except to the extent of any indirect pecuniary interest therein.
Amount beneficially owned: 15,510,078 shares of Class A Common Stock.

Percent of Class: 5.3%

Number of shares the Reporting Persons have:

Sole power to vote or direct the vote: 15,510,078 shares of Class A Common Stock. Each share of Class A Common Stock carries one vote per share.

Shared power to vote: 0

Sole power to dispose or direct the disposition of: 15,510,078 shares of Class A Common Stock.

Shared power to dispose or direct the disposition of: 0

Calculations of the percentage of the shares of Class A Common Stock beneficially owned is based on 292,637,039 shares of Class A Common Stock outstanding as of February 26, 2026, as reported in the Annual Report on Form 10-K.

**(b)**
—

**(c)**
Except as described in this Schedule 13D/A, during the past 60 days, the Reporting Persons effected the following transactions with respect to Class A Common Stock:

Date: April 27, 2026 Transaction: Sale
Number of Shares: 400,000
Average Price Per Share: $76.3098

Date: April 28, 2026 Transaction: Sale
Number of Shares: 430,000
Average Price Per Share: $73.9463

Date: April 29, 2026 Transaction: Sale
Number of Shares: 70,500
Average Price Per Share: $70.3395

Date: April 30, 2026 Transaction: Sale
Number of Shares: 1,800,000
Average Price Per Share: $73.2644

Date: May 1, 2026  Transaction: Sale
Number of Shares: 870,000
Average Price Per Share: $72.0739

Date: May 4, 2026
Transaction: Sale
Number of Shares: 970,000
Average Price Per Share: $69.2240

Date: May 5, 2026  Transaction: Sale
Number of Shares: 969,577
Average Price Per Share: $65.3255

The sales set forth above were effected pursuant to the Trading Plan in open market transactions.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

The information set forth or incorporated by reference in Items 3, 4 and 5 of this Schedule 13D/A is incorporated by reference in its entirety into this Item 6.

Except as set forth in the Schedule 13D, the Reporting Persons do not have any contracts, arrangements, understandings or relationships (legal or otherwise) with any person with respect to any securities of the Issuer, including but not limited to any contracts, arrangements, understandings or relationships concerning the transfer or voting of such securities, finder's fees, joint ventures, loan or option arrangements, puts or calls, guarantees of profits, division of profits or losses, or the giving or withholding of proxies.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Rakuten Mobile, Inc.

**Signature:** /s/ Atsushi Maeda

**Name/Title:** Atsushi Maeda/Director, Executive Vice President and Chief Financial Officer

**Date:** 05/05/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Hiroshi Mikitani

**Signature:** /s/ Hiroshi Mikitani

**Name/Title:** Hiroshi Mikitani

**Date:** 05/05/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Rakuten Group, Inc.

**Signature:** /s/ Kentaro Hyakuno

**Name/Title:** Kentaro Hyakuno/Representative Director, Group Senior Executive Vice President

**Date:** 05/05/2026