Alto Ingredients CEO reports tax share withholding

Alto Ingredients President & CEO Bryon T. McGregor reported a routine tax-related share disposition.

Rhea-AI Filing Summary

Alto Ingredients President & CEO Bryon T. McGregor reported a routine tax-related share disposition. On the vesting of restricted stock, 73,062 shares of common stock were withheld at $4.79 per share to cover withholding taxes. After this non‑market transaction, he directly owned 957,882 common shares.

Insider Trade Summary

Exercise Price or Tax Liability: 73,062 shares

Exercise Price or Tax Liability 1 txn

Insider McGregor Bryon T

Role President & CEO

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	73,062	$4.79	$350K

Holdings After Transaction: Common Stock — 957,882 shares (Direct)

Footnotes (1)

1. F1. Amount represents shares withheld upon vesting of restricted stock to cover withholding taxes.

Key Figures

Shares withheld for taxes: 73,062 shares Reference price per share: $4.79 per share Shares owned after transaction: 957,882 shares

3 metrics

Shares withheld for taxes 73,062 shares Withheld upon restricted stock vesting

Reference price per share $4.79 per share Value used for withheld shares

Shares owned after transaction 957,882 shares Direct common stock holding post-event

Key Terms

restricted stock, withholding taxes, tax-withholding disposition

3 terms

restricted stock financial

"Amount represents shares withheld upon vesting of restricted stock to cover withholding taxes."

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

withholding taxes financial

"shares withheld upon vesting of restricted stock to cover withholding taxes."

Withholding taxes are amounts a payer or government takes out of payments — such as wages, interest, or dividends — before the recipient gets the money, functioning like a cashier keeping part of a bill to pay taxes on your behalf. For investors this matters because it reduces the cash they actually receive, affects net returns and yield calculations, and may require additional paperwork or treaty claims to recover or offset the withheld amount against final tax bills.

tax-withholding disposition financial

"transaction_action: "tax-withholding disposition" for 73,062 common shares."

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

FAQ

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

What did Alto Ingredients (ALTO) CEO Bryon McGregor report in this Form 4?

Bryon T. McGregor reported a tax-related share disposition. 73,062 common shares were withheld upon vesting of restricted stock to cover withholding taxes, leaving him with 957,882 directly owned shares in Alto Ingredients after the transaction.

Was the Alto Ingredients (ALTO) CEO’s Form 4 transaction an open-market sale?

No, the reported transaction was not an open-market sale. The 73,062 shares were withheld by Alto Ingredients upon vesting of restricted stock specifically to satisfy withholding tax obligations, a common administrative step for equity compensation.

How many Alto Ingredients (ALTO) shares were withheld for taxes in this filing?

The filing shows that 73,062 shares of common stock were withheld. These shares were retained by the company when restricted stock vested, at a reference value of $4.79 per share, to cover required withholding taxes for Bryon McGregor.

How many Alto Ingredients (ALTO) shares does the CEO hold after this Form 4 event?

After the tax-withholding disposition, Bryon T. McGregor directly owns 957,882 shares of Alto Ingredients common stock. This figure reflects his holdings after the company withheld 73,062 vested shares to cover withholding taxes on restricted stock.

What does the footnote about restricted stock mean in the Alto Ingredients (ALTO) Form 4?

The footnote explains that the reported amount represents shares withheld upon vesting of restricted stock to cover withholding taxes. This clarifies the transaction is a compensation-related tax event, not a discretionary purchase or sale in the open market.

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

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Accepted by SEC EDGAR 04/03/2026 - 01:40 PM EDT 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^*

McGregor Bryon T

(Last) (First) (Middle)

1300 SOUTH SECOND STREET

(Street)

PEKIN ILLINOIS 61554

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Alto Ingredients, Inc. [ ALTO ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/01/2026

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
Common Stock	04/01/2026		F		73,062(1)	D	$4.79	957,882	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. Amount represents shares withheld upon vesting of restricted stock to cover withholding taxes.

	/s/ Bryon T. McGregor	04/03/2026
	** 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)