Charitable gift: Alto Ingredients (ALTO) CLO donates 20,000 shares

Rhea-AI Filing Summary

Alto Ingredients executive Graham Auste M, the company’s CLO & Secretary, reported a bona fide charitable gift of 20,000 shares of Common Stock. The shares were donated to a donor advised fund at Vanguard Charitable, and he now directly holds 233,173 shares after the transfer.

Insider Trade Summary

20,000 shares gifted

Mixed 1 txn

Insider Graham Auste M

Role CLO & Secretary

Type	Security	Shares	Price	Value
Gift	Common Stock	20,000	$0.00	--

Holdings After Transaction: Common Stock — 233,173 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares gifted: 20,000 shares Price per share: $0.0000 Shares held after transaction: 233,173 shares +2 more

5 metrics

Shares gifted 20,000 shares Bona fide charitable gift of Common Stock

Price per share $0.0000 Reported value for gifted shares

Shares held after transaction 233,173 shares Direct ownership following the gift

Gift transactions 1 transaction Gift count in transaction summary

Total gift shares in summary 20,000 shares GiftShares in transactionSummary

Key Terms

bona fide gift, donor advised fund, Vanguard Charitable, Common Stock

4 terms

bona fide gift financial

"Represents a bona fide charitable gift of shares to a donor advised fund"

A bona fide gift is a genuine, voluntary transfer of money, property, or benefits from one party to another made without expectation of repayment, services, or hidden conditions. Investors care because such gifts can affect company disclosures, related‑party transaction rules, tax treatment, and perceived conflicts of interest; think of it like someone giving you a present with no strings attached — but on a corporate scale, auditors and regulators need to verify it really is unconditional.

donor advised fund financial

"bona fide charitable gift of shares to a donor advised fund at Vanguard Charitable"

A donor advised fund is a charitable savings account you fund with cash or assets (including stocks) that lets you take an immediate tax benefit while recommending when and which charities receive grants over time. Think of it like a dedicated piggy bank for giving: you get tax relief when you put money in, can avoid selling appreciated securities and triggering capital gains, and still control the timing and recipients of donations, which affects tax planning, portfolio decisions, and public giving signals.

Vanguard Charitable financial

"bona fide charitable gift of shares to a donor advised fund at Vanguard Charitable"

Common Stock financial

"security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 Insider Transactions: What Each Field Means →

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^*

Graham Auste M

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/14/2026

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
Common Stock	05/14/2026		G		20,000(1)	D	$0.00	233,173	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. Represents a bona fide charitable gift of shares to a donor advised fund at Vanguard Charitable.

	/s/ Auste M. Graham	05/18/2026
	** 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)

FAQ

What insider transaction did Alto Ingredients (ALTO) disclose in this Form 4?

Alto Ingredients disclosed that CLO & Secretary Graham Auste M made a bona fide charitable gift of 20,000 shares of Common Stock. The transfer is reported with no sale proceeds, reflecting a donation rather than a market transaction.

How many Alto Ingredients (ALTO) shares did Graham Auste M gift?

Graham Auste M gifted 20,000 shares of Alto Ingredients Common Stock. This amount is classified in the Form 4 as a bona fide charitable gift under transaction code G, indicating no purchase or sale occurred in the open market.

To whom were the 20,000 Alto Ingredients (ALTO) shares donated?

The 20,000 Alto Ingredients shares were donated to a donor advised fund at Vanguard Charitable. The Form 4 footnote specifies this as a bona fide charitable gift, clarifying the shares were transferred for charitable purposes rather than sold for cash.

How many Alto Ingredients (ALTO) shares does Graham Auste M hold after the gift?

After the charitable gift, Graham Auste M directly holds 233,173 shares of Alto Ingredients Common Stock. This post-transaction balance is reported in the Form 4 and reflects his remaining direct ownership following the 20,000-share donation.

Was the Alto Ingredients (ALTO) Form 4 transaction a sale of shares?

No, the transaction was not a sale. The Form 4 identifies it as a bona fide charitable gift, coded G, with a per-share price of $0.0000. This indicates a donation of shares, not an open-market sale for cash proceeds.

What does transaction code G mean in the Alto Ingredients (ALTO) Form 4?

Transaction code G signifies a bona fide gift of securities. In this case, it reflects Graham Auste M’s charitable transfer of 20,000 Alto Ingredients Common Stock shares, with no purchase or sale price involved and no cash consideration reported.