[SCHEDULE 13D/A] WiSA Technologies, Inc. SEC Filing

Rhea-AI Filing Summary

A Schedule 13D/A filing reveals significant ownership changes in Datavault AI. Nathaniel Bradley, the company's CEO and board member, beneficially owns 10,695,952 shares (13.1%) of common stock, consisting of:

• 3,715,361 shares held directly
• 3,999,911 shares through EOS Technology Holdings
• 2,980,680 shares held by spouse Sonia Choi

Recent transactions include Bradley receiving 50,000 shares from RSU vesting and 218,905 restricted shares as compensation. Sonia Choi, Chief Marketing Officer, received 150,000 and 54,726 restricted shares as employee compensation in February and June 2025, respectively. Notably, EOS Technology Holdings (formerly Data Vault Holdings) has dropped below 5% ownership, now holding 4.9% of outstanding shares. The filing is based on 81,593,467 total outstanding shares as of June 25, 2025.

Positive

• CEO Nathaniel Bradley and CMO Sonia Choi received additional equity compensation, demonstrating alignment with shareholder interests (Bradley: 268,905 shares, Choi: 204,726 shares)
• Management team maintains significant ownership stake with Bradley beneficially owning 13.1% of outstanding shares, indicating strong insider commitment

Negative

• EOS Technology Holdings' ownership stake dropped below 5% (to 4.9%), potentially signaling reduced strategic interest from a major institutional holder

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 1)

Datavault AI Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

86633R609

(CUSIP Number)

Nathaniel Bradley
48 Wall Street, Floor 11,
New York, NY, 10005
520-631-9595

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

06/25/2025

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

SCHEDULE 13D

CUSIP No. 86633R609

1

Name of reporting person

Nathaniel Bradley

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 10,695,952.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 10,695,952.00

11

Aggregate amount beneficially owned by each reporting person

10,695,952.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

13.1 %

14

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person:

Mr. Bradley is Chief Executive Officer and sole director of EOS Technology Holdings Inc. (formerly known as Data Vault Holdings Inc.) and the spouse of Sonia Choi. The shares beneficially owned by Mr. Bradley consist of 3,715,361 shares held directly by Mr. Bradley, 3,999,911 shares held directly by EOS Technology Holdings Inc., and 2,980,680 shares held directly by Ms. Choi.

SCHEDULE 13D

CUSIP No. 86633R609

1

Name of reporting person

Sonia Choi

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 6,696,041.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 6,696,041.00

11

Aggregate amount beneficially owned by each reporting person

6,696,041.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

8.2 %

14

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person:

Ms. Choi is the spouse of Mr. Bradley. The shares beneficially owned by Ms. Choi consist of 2,980,680 shares held directly by Ms. Choi and 3,715,361 shares held directly by Mr. Bradley.

SCHEDULE 13D

CUSIP No. 86633R609

1

Name of reporting person

EOS Technology Holdings Inc.

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 3,999,911.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 3,999,911.00

11

Aggregate amount beneficially owned by each reporting person

3,999,911.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

4.9 %

14

Type of Reporting Person (See Instructions)

CO

Comment for Type of Reporting Person:

These shares are held directly by EOS Technology Holdings Inc.

SCHEDULE 13D

Item 1.	Security and Issuer
(a)	Title of Class of Securities: Common Stock
(b)	Name of Issuer: Datavault AI Inc.
(c)	Address of Issuer's Principal Executive Offices: 15268 NW Greenbrier Pkwy, Beaverton, OREGON , 97006.
Item 1 Comment: This Amendment No. 1 to Schedule 13D (this "Amendment No. 1") relating to the shares of common stock, par value $0.0001 per share ("Common Stock"), of Datavault AI Inc., a Delaware corporation (the "Issuer"), amends and supplements the Schedule 13D originally filed by the Reporting Persons with the Securities and Exchange Commission (the "SEC") on January 13, 2025 (the "Schedule 13D"). Except as specifically amended below, all other provisions of the Schedule 13D remain in effect. Capitalized terms used herein but not defined herein have the respective meanings ascribed to them in the Schedule 13D.
Item 2.	Identity and Background
(a)	Item 2(a) of the Schedule 13D is amended and restated as follows: This Schedule 13D is being filed by (i) Nathaniel Bradley, with respect to the shares directly and beneficially owned by him, his spouse, Sonia Choi, and EOS Technology Holdings Inc. ("EOS", formerly known as Data Vault Holdings Inc. or "Data Vault."), of which Mr. Bradley is Chief Executive Officer and sold director; (ii) Ms. Choi, with respect to the shares directly and beneficially owned by her and her spouse, Mr. Bradley; and (iii) EOS, with respect to the shares directly and beneficially owned by it (together with Mr. Bradley and Ms. Choi, the "Reporting Persons").
(c)	Item 2(c) of the Schedule 13D is amended and restated as follows: EOS is a data technology and licensing company. Mr. Bradley is the Chief Executive Officer and sole director of EOS. Mr. Bradley is also the Chief Executive Officer and a member of the board of directors of the Issuer. Ms. Choi is the Chief Marketing Officer of EOS and the Issuer.
Item 3.	Source and Amount of Funds or Other Consideration
	Item 3 of the Schedule 13D is amended to add the following: On June 20, 2025, Mr. Bradley received 50,000 shares as a result of the scheduled vesting of a portion of the restricted stock units ("RSUs") granted on January 2, 2025 as compensation for Mr. Bradley's service as an officer of the Issuer. On June 25, 2025, Mr. Bradley received 218,905 restricted shares as compensation for his service as an employee of the Issuer pursuant to the issuer's 2018 Long-Term Stock Incentive Plan. On February 26, 2025 and June 25, 2025, Ms. Choi received 150,000 and 54,726 restricted shares, respectively, as compensation for her service as an employee of the Issuer pursuant to the issuer's 2018 Long-Term Stock Incentive Plan.
Item 4.	Purpose of Transaction
	Item 4 of the Schedule 13D is amended to add the following: To the extent required, the disclosure in Item 3 of this Amendment No. 1 is incorporated by reference in this Item 4.
Item 5.	Interest in Securities of the Issuer
(a)	Item 5(a) of the Schedule 13D is amended and restated as follows: The percentage ownership of shares of Common Stock set forth in this Amendment No. 1 is based upon 81,593,467 shares outstanding as of June 25, 2025.
(b)	Item 5(b) of the Schedule 13D is amended and restated as follows: As of the date of this Amendment No. 1, Mr. Bradley beneficially owned 10,695,952 shares, consisting of 3,715,361 shares held directly by Mr. Bradley, 3,999,911 shares held directly by EOS Technology Holdings Inc., and 2,980,680 shares held directly by Ms. Choi. As of the date of this Amendment No. 1, Ms. Choi beneficially owned 6,696,041 shares, consisting of 2,980,680 shares held directly by Ms. Choi and 3,715,361 shares held directly by Mr. Bradley.
(c)	Except as set forth in Item 4 of this Amendment No. 1, the Reporting Persons have not engaged in any transaction with respect to the Common Stock during the sixty days prior to the date of filing this Amendment No. 1.
(e)	Item 5(e) of the Schedule 13D is amended to add the following: As of June 25, 2025, EOS Technology Holdings Inc. had ceased to be the beneficial owner of more than five percent of the outstanding shares of the Issuer.

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.

Nathaniel Bradley

Signature:	/s/ Nathaniel Bradley
Name/Title:	Nathaniel Bradley
Date:	06/27/2025

Sonia Choi

Signature:	/s/ Sonia Choi
Name/Title:	Sonia Choi
Date:	06/27/2025

EOS Technology Holdings Inc.

Signature:	/s/ Nathaniel Bradley
Name/Title:	Nathaniel Bradley, CEO
Date:	06/27/2025

FAQ

How many shares of WISA (Datavault AI) does Nathaniel Bradley beneficially own as of June 2025?

According to the Schedule 13D/A filing, Nathaniel Bradley beneficially owns 10,695,952 shares, consisting of 3,715,361 shares held directly, 3,999,911 shares held by EOS Technology Holdings Inc., and 2,980,680 shares held by his spouse Sonia Choi, representing approximately 13.1% of outstanding shares.

What recent stock compensation did WISA's CEO Nathaniel Bradley receive in June 2025?

In June 2025, Nathaniel Bradley received two forms of stock compensation: 50,000 shares from vested RSUs granted on January 2, 2025, and 218,905 restricted shares granted on June 25, 2025 under the company's 2018 Long-Term Stock Incentive Plan.

What is Sonia Choi's ownership position in WISA stock as of June 2025?

Sonia Choi beneficially owns 6,696,041 shares (8.2% of outstanding shares), which includes 2,980,680 shares held directly by her and 3,715,361 shares held by her spouse Nathaniel Bradley. She recently received 150,000 restricted shares on February 26, 2025 and 54,726 restricted shares on June 25, 2025.

Why did EOS Technology Holdings Inc. cease to be a 5% holder of WISA stock?

As of June 25, 2025, EOS Technology Holdings Inc.'s ownership fell below 5% of outstanding shares, holding 3,999,911 shares representing 4.9% of the company. This is based on 81,593,467 total outstanding shares of WISA as of June 25, 2025.

What positions do Nathaniel Bradley and Sonia Choi hold at WISA (Datavault AI)?

Nathaniel Bradley serves as the Chief Executive Officer and a member of the board of directors of Datavault AI Inc. (WISA). Sonia Choi serves as the Chief Marketing Officer of the company. Both also hold executive positions at EOS Technology Holdings Inc.