Ideal Power Inc. (IPWR): Laurence W. Lytton discloses 7.5% beneficial stake

Rhea-AI Filing Summary

Ideal Power Inc. reports that investor Laurence W. Lytton has beneficial ownership tied to its common stock. Lytton is associated with a total of 959,856 shares of common stock and warrants, representing 7.5% of the class, based on 12,155,901 shares outstanding as of May 10, 2026. This includes 328,524 shares with sole voting and dispositive power and warrants for 631,332 shares with shared voting and dispositive power, all subject to a 9.99% beneficial ownership limitation.

Key Figures

Beneficially owned shares and warrants: 959,856 Ownership percentage: 7.5% Sole voting and dispositive power: 328,524 +3 more

6 metrics

Beneficially owned shares and warrants 959,856 Total beneficial ownership in Ideal Power common stock and warrants

Ownership percentage 7.5% Percent of Ideal Power common stock class beneficially owned

Sole voting and dispositive power 328,524 Shares over which Lytton has sole voting and dispositive power

Shared voting and dispositive power (warrants) 631,332 Warrants with shared voting and dispositive power

Shares outstanding baseline 12,155,901 Ideal Power common shares outstanding as of May 10, 2026

Beneficial ownership limitation 9.99% Cap applied to exercises of warrants held by Lytton

Key Terms

beneficial ownership limitation, sole voting power, shared dispositive power

3 terms

beneficial ownership limitation regulatory

"warrants to purchase 631,332 shares of Common Stock, subject to a 9.99% beneficial ownership limitation"

A beneficial ownership limitation is a rule that caps the percentage of a company’s shares an investor can be treated as owning or controlling for voting, regulatory or tax purposes. It matters to investors because it can restrict how many shares a person or group can buy or vote, affect takeover chances, and influence share liquidity and value — like a speed limit that prevents any single driver from taking over the whole road.

sole voting power financial

"Sole Voting Power 328,524.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

shared dispositive power financial

"Shared Dispositive Power 631,332.00"

FAQ

What percentage of Ideal Power Inc. (IPWR) does Laurence W. Lytton beneficially own?

Laurence W. Lytton beneficially owns 7.5% of Ideal Power Inc.’s common stock. This percentage is calculated using 12,155,901 shares outstanding as of May 10, 2026, as reported for the quarter ended March 31, 2026.

How many Ideal Power Inc. (IPWR) shares are beneficially owned by Laurence W. Lytton?

Laurence W. Lytton is reported to beneficially own 959,856 Ideal Power Inc. common shares and related warrants. This amount combines 328,524 shares held with sole power and warrants for 631,332 shares with shared power.

What is the breakdown of Laurence W. Lytton’s voting power in Ideal Power Inc. (IPWR)?

Laurence W. Lytton has 328,524 Ideal Power Inc. shares with sole voting power and 631,332 shares subject to shared voting power. These same amounts apply to his sole and shared dispositive power over the common stock.

What beneficial ownership limitation applies to Laurence W. Lytton’s Ideal Power Inc. (IPWR) warrants?

Lytton’s warrants to purchase 631,332 Ideal Power Inc. shares are subject to a 9.99% beneficial ownership limitation. This limitation restricts exercises that would increase his beneficial ownership above 9.99% of the outstanding common stock.

How many Ideal Power Inc. (IPWR) shares were outstanding for the 7.5% ownership calculation?

The 7.5% ownership figure is based on 12,155,901 Ideal Power Inc. common shares outstanding. This outstanding share count is as of May 10, 2026, as reported for the quarter ended March 31, 2026.

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Available on EDGAR 08/13/2026 - 02:05 PM Accepted by SEC EDGAR 08/13/2026 - 02:04 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Ideal Power Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP No.

1

Names of Reporting Persons

LYTTON LAURENCE W

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 328,524.00
6	Shared Voting Power 631,332.00
7	Sole Dispositive Power 328,524.00
8	Shared Dispositive Power 631,332.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

959,856.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.5 %

12

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person: The shares of the Common Stock reported herein consist of 328,524 shares of Common Stock and warrants to purchase 631,332 shares of Common Stock, subject to a 9.99% beneficial ownership limitation. Percentage calculated based on 12,155,901 shares of Common Stock outstanding on May 10, 2026, as reported in the Form 10-Q filed by the Issuer for the quarter ended March 31, 2026.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Ideal Power Inc.
(b)	Address of issuer's principal executive offices: 5508 Highway 290 West, Suite 120, Austin TX 78735
Item 2.
(a)	Name of person filing: Laurence W. Lytton
(b)	Address or principal business office or, if none, residence: 467 Central Park West New York, NY 10025
(c)	Citizenship: USA
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.:
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 959,856
(b)	Percent of class: 7.5%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 328,524
	(ii) Shared power to vote or to direct the vote: 631,332
	(iii) Sole power to dispose or to direct the disposition of: 328,524
	(iv) Shared power to dispose or to direct the disposition of: 631,332
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

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.

LYTTON LAURENCE W

Signature:	/s/ Laurence W. Lytton
Name/Title:	Reporting Person
Date:	08/13/2026