American Bitcoin director buys 306,981 shares

American Bitcoin Corp. director Justin Mateen reported open-market purchases of the company’s Class A Common Stock on two consecutive days.

Rhea-AI Filing Summary

American Bitcoin Corp. director Justin Mateen reported open-market purchases of the company’s Class A Common Stock on two consecutive days. He bought 162,438 shares at $6.1873 per share on August 6, 2026 and 144,543 shares at $6.3964 per share on August 5, 2026, totaling 306,981 shares.

The reported prices are each a weighted average price, and detailed per-trade prices are available on request. The share amounts reflect a 1-for-15 reverse stock split that took effect on July 2, 2026. The transactions are not reported as being under a Rule 10b5-1 trading plan.

Insider Trade Summary

Net Buyer: 306,981 shares

Net Buy 2 txns

Insider Mateen Justin

Role Director

Bought 306,981 shs ($1.93M)

Type	Security	Shares	Price	Value
Purchase	Class A Common Stock F1, F2	162,438	$6.1873	$1.01M
Purchase	Class A Common Stock F1, F2	144,543	$6.3964	$925K

Holdings After Transaction: Class A Common Stock — 492,297 shares (Direct)

Footnotes (2)

1. F1. The price reported in Column 4 is a weighted average price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.
2. F2. On July 2, 2026, the Issuer effected a 1-for-15 reverse stock split (the "Reverse Stock Split"). The number of securities reported on this Form 4 have been adjusted to reflect the Reverse Stock Split.

Key Figures

Shares purchased on 2026-08-06: 162,438 shares Shares purchased on 2026-08-05: 144,543 shares Total shares purchased: 306,981 shares +1 more

4 metrics

Shares purchased on 2026-08-06 162,438 shares Class A Common Stock bought at weighted average price of $6.1873 per share

Shares purchased on 2026-08-05 144,543 shares Class A Common Stock bought at weighted average price of $6.3964 per share

Total shares purchased 306,981 shares Sum of two open-market purchases reported in the Form 4

Reverse stock split ratio 1-for-15 Reverse stock split effected on July 2, 2026; reported amounts adjusted accordingly

Key Terms

weighted average price, Reverse Stock Split, Class A Common Stock, Rule 10b5-1 trading plan

4 terms

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

Reverse Stock Split financial

"the Issuer effected a 1-for-15 reverse stock split (the "Reverse Stock Split")."

A reverse stock split reduces a company's number of outstanding shares while raising the price per share proportionally, so the total value of each investor's holding is unchanged; a 1-for-10 split turns 100 shares worth $1 each into 10 shares worth $10 each. Companies often do this to regain compliance with an exchange's minimum price rule or to attract investors who avoid very low-priced stocks.

Class A Common Stock financial

"security_title": "Class A Common Stock""

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.

Rule 10b5-1 trading plan regulatory

"The transactions are not reported as being under a Rule 10b5-1 trading plan."

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

FAQ

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

What insider transactions did ABTC director Justin Mateen report?

Justin Mateen reported two open-market purchases of American Bitcoin Corp. Class A Common Stock, buying a total of 306,981 shares on August 5 and 6, 2026 at weighted average prices of $6.3964 and $6.1873 per share, respectively.

How many ABTC shares did Justin Mateen buy on August 6, 2026?

On August 6, 2026, Justin Mateen bought 162,438 shares of American Bitcoin Corp. Class A Common Stock at a weighted average price of $6.1873 per share. The filing notes the company can provide the detailed breakdown of prices on request.

How many ABTC shares did Justin Mateen buy on August 5, 2026?

On August 5, 2026, Justin Mateen bought 144,543 shares of American Bitcoin Corp. Class A Common Stock at a weighted average price of $6.3964 per share, reported as an open-market or private transaction under transaction code P.

Are Justin Mateen’s ABTC share purchases under a Rule 10b5-1 plan?

No. The Form 4 indicates the Rule 10b5-1 trading plan affirmation box is not checked, so these August 5 and 6, 2026 purchases are not reported as made pursuant to a pre-arranged Rule 10b5-1 trading plan.

How did ABTC’s July 2, 2026 reverse stock split affect the reported transactions?

American Bitcoin Corp. effected a 1-for-15 reverse stock split on July 2, 2026. The Form 4 states that the number of securities reported for Justin Mateen’s August 5 and 6 purchases has been adjusted to reflect this reverse stock split.

What is the total volume of ABTC shares Justin Mateen bought in this Form 4?

Across both reported transactions, Justin Mateen bought 306,981 shares of American Bitcoin Corp. Class A Common Stock, all classified as direct ownership. The filing’s transaction summary characterizes this activity as a net-buy of 306,981 shares.

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

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Available on EDGAR 08/07/2026 - 04:16 PM Accepted by SEC EDGAR 08/07/2026 - 04:15 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^*

Mateen Justin

(Last) (First) (Middle)

777 BRICKELL AVENUE, SUITE 200

(Street)

MIAMI FLORIDA 33131

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
American Bitcoin Corp. [ ABTC ]

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)
08/05/2026

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	08/05/2026		P		144,543	A	$6.3964(1)	329,859(2)	D
Class A Common Stock	08/06/2026		P		162,438	A	$6.1873(1)	492,297(2)	D

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. The price reported in Column 4 is a weighted average price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

2. On July 2, 2026, the Issuer effected a 1-for-15 reverse stock split (the "Reverse Stock Split"). The number of securities reported on this Form 4 have been adjusted to reflect the Reverse Stock Split.

	By: /s/ Aliza Rana, as Attorney-in-Fact	08/07/2026
	** 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)