A23 Revocable Trust reports 8.0M Boost Run (BRUN) Class A shares

Rhea-AI Filing Summary

Boost Run Inc. reported that A23 Revocable Trust No.1, Dated January 26, 2026 is a more than 10% beneficial owner of the company’s Class A common stock. The trust holds 8,016,095 shares of Class A Common Stock, par value $0.0001 per share, in a direct ownership position.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider A23 Revocable Trust No.1, Dated January 26, 2026

Role null

Type	Security	Shares	Price	Value
holding	Class A Common Stock, par value $0.0001 per share	--	--	--

Holdings After Transaction: Class A Common Stock, par value $0.0001 per share — 8,016,095 shares (Direct, null)

Footnotes (1)

Key Figures

Shares beneficially owned: 8,016,095 shares Ownership status: More than 10% owner Security type: Class A Common Stock, $0.0001 par value

3 metrics

Shares beneficially owned 8,016,095 shares Class A Common Stock held after reported position

Ownership status More than 10% owner Reporting person classification in Form 3

Security type Class A Common Stock, $0.0001 par value Reported security title

Key Terms

Class A Common Stock, par value, more than 10% owner, beneficial ownership

4 terms

Class A Common Stock financial

"Class A Common Stock, par value $0.0001 per share"

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

par value financial

"Class A Common Stock, par value $0.0001 per share"

Par value is the fixed amount printed on a bond or stock that represents its original value when issued. It’s like the face value of a coin or bill—what the issuer promises to pay back or the starting price of a stock—though it often doesn’t change with market prices. It matters because it helps determine certain financial details, like how much the company will pay back at maturity.

more than 10% owner regulatory

"identified as a more than 10% owner of the company"

beneficial ownership regulatory

"initial statement of beneficial ownership by a major holder"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

Understanding Insider Trading Forms →

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
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hours per response:			0.5

1. Name and Address of Reporting Person^*

A23 Revocable Trust No.1, Dated January 26, 2026

(Last) (First) (Middle)

C/O BOOST RUN INC.

5 REVERE DRIVE, SUITE 200

(Street)

NORTHBROOK ILLINOIS 60062

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
05/08/2026

3. Issuer Name and Ticker or Trading Symbol
Boost Run Inc. [ BRUN ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class A Common Stock, par value $0.0001 per share	8,016,095	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	A23 Revocable Trust No.1, Dated January 26, 2026 By, /s/ Harry Georgakopoulos, Trustee	05/15/2026
	** Signature of Reporting Person	Date
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 5 (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 3: SEC 1473 (03-26)

FAQ

What does Boost Run Inc. (BRUN) disclose in this Form 3 filing?

Boost Run Inc. discloses the initial beneficial ownership of its stock by A23 Revocable Trust No.1. The trust is identified as a more than 10% owner, holding a large block of Class A common shares, giving investors transparency on significant ownership positions.

Who is the reporting person in Boost Run Inc. (BRUN) Form 3?

The reporting person is A23 Revocable Trust No.1, Dated January 26, 2026. It is not listed as a director or officer but is identified as a more than 10% owner, meaning it controls a substantial stake in Boost Run Inc.’s Class A common stock.

How many Boost Run Inc. (BRUN) shares does the reporting trust hold?

The trust holds 8,016,095 shares of Class A Common Stock. This amount is reported as the total shares beneficially owned following the reported position, highlighting that the trust controls a significant equity stake in Boost Run Inc. at the time of this Form 3 filing.

Does the Boost Run Inc. (BRUN) Form 3 show any recent insider transactions?

No specific buy or sell transaction is reported. The filing records a holding entry, showing total shares owned after the reported position. It functions as an initial statement of beneficial ownership rather than a record of new trading activity in the stock.

Is the A23 Revocable Trust a director or officer of Boost Run Inc. (BRUN)?

The trust is not reported as a director or officer of Boost Run Inc. Instead, it is classified solely as a more than 10% owner. This indicates significant ownership influence without implying a formal management or board role in the company.