Boost Run director sells 500K shares at $14

Boost Run Inc. (BRUN) director Sean Goodrich reported that Goodrich ILMJS LLC, an entity he manages, sold 500,000 shares of Class A Common Stock on September 14, 2026 at $14.00 per share in an open-market or private transaction.

Rhea-AI Filing Summary

Boost Run Inc. (BRUN) director Sean Goodrich reported that Goodrich ILMJS LLC, an entity he manages, sold 500,000 shares of Class A Common Stock on September 14, 2026 at $14.00 per share in an open-market or private transaction. After the sale, the LLC held 4,437,921 shares indirectly attributed to Goodrich, who disclaims beneficial ownership beyond any pecuniary interest. No Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Net Seller: 500,000 shares

Net Sell 1 txn

Insider Goodrich Sean

Role Director

Sold 500,000 shs ($7.00M)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F1	500,000	$14.00	$7.00M

Holdings After Transaction: Class A Common Stock — 4,437,921 shares (Indirect, By Goodrich ILJMS LLC)

Footnotes (1)

1. F1. Goodrich ILMJS LLC is the record hold of such securities. Mr. Goodrich is the managing member of Goodrich ILMJS LLC and holds and holds voting and investment discretion with respect to the shares of Boost Run Inc. Class A Common Stock held of record by Goodrich ILMJS LLC. Mr. Goodrich disclaims any beneficial ownership of the securities held by Goodrich ILMJS LLC other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

Key Figures

Shares sold: 500,000 shares Sale price per share: $14.00 per share Shares held after transaction: 4,437,921 shares +1 more

4 metrics

Shares sold 500,000 shares Class A Common Stock sale reported for September 14, 2026

Sale price per share $14.00 per share Price for 500,000 Class A shares sold on September 14, 2026

Shares held after transaction 4,437,921 shares Indirectly held by Goodrich through Goodrich ILMJS LLC after the sale

Net buy/sell shares 500,000 shares net sold Net effect of reported transactions in this Form 4

Key Terms

Class A Common Stock, indirectly, beneficial ownership, pecuniary interest

4 terms

Class A Common Stock financial

"shares of Boost Run Inc. Class A Common Stock held of record"

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.

indirectly financial

"Mr. Goodrich may have therein, directly or indirectly"

beneficial ownership financial

"Mr. Goodrich disclaims any beneficial ownership of the securities"

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.

pecuniary interest financial

"other than to the extent of any pecuniary interest he may have"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did BRUN director Sean Goodrich report?

He reported that Goodrich ILMJS LLC, an entity he manages, sold 500,000 shares of Boost Run Inc. Class A Common Stock on September 14, 2026 at $14.00 per share in an open-market or private transaction.

How many BRUN shares does the affiliated LLC hold after this transaction?

Following the sale, Goodrich ILMJS LLC held 4,437,921 shares of Boost Run Inc. Class A Common Stock, reported as indirectly owned by director Sean Goodrich.

Was the Sean Goodrich BRUN share sale under a Rule 10b5-1 plan?

No. The filing’s Rule 10b5-1 checkbox is not marked as affirmative, and no Rule 10b5-1 trading plan is reported for this 500,000-share sale.

Who is the record holder of the BRUN shares sold in this Form 4?

The record holder is Goodrich ILMJS LLC. The filing states it is the record holder of the securities, and Sean Goodrich is its managing member with voting and investment discretion over those shares.

Does Sean Goodrich claim full beneficial ownership of the BRUN shares held by the LLC?

No. Sean Goodrich disclaims beneficial ownership of securities held by Goodrich ILMJS LLC, except to the extent of any pecuniary interest he may have in them, directly or indirectly.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/16/2026 - 04:31 PM Accepted by SEC EDGAR 09/16/2026 - 04:30 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Goodrich Sean

(Last) (First) (Middle)

C/O BOOST RUN INC.

5 REVERE DRIVE, SUITE 200

(Street)

NORTHBROOK ILLINOIS 60062

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/14/2026

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

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

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

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	09/14/2026		S		500,000	D	$14	4,437,921	I	By Goodrich ILJMS LLC(1)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Goodrich ILMJS LLC is the record hold of such securities. Mr. Goodrich is the managing member of Goodrich ILMJS LLC and holds and holds voting and investment discretion with respect to the shares of Boost Run Inc. Class A Common Stock held of record by Goodrich ILMJS LLC. Mr. Goodrich disclaims any beneficial ownership of the securities held by Goodrich ILMJS LLC other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

	/s/ Sean Goodrich	09/16/2026
	** 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 4 (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 4: SEC 1474 (03-26)