What is Andrew Shafer’s remaining Gevo (GEVO) share ownership after this Form 4?

Following the reported sale, Andrew Shafer directly holds 321,051 shares of Gevo common stock. He also indirectly owns 16,858.96 shares through the company’s 401(k) plan, according to the position information provided in the Form 4 filing.

Gevo (GEVO) officer logs tax-related share sale under Rule 10b5-1 plan

Filing Impact

(Neutral)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Gevo, Inc. officer Andrew Shafer reported routine share activity. On May 27, 2026, he sold 32,667 shares of common stock at a weighted average price of $1.7598 per share to cover tax withholding obligations upon vesting of a restricted stock award, under a pre-arranged Rule 10b5-1 trading plan. After this sale, he directly holds 321,051 shares of Gevo common stock. He also indirectly holds 16,858.96 shares through the company’s 401(k) plan, where a total of 6.29 shares were disposed of between May 20 and May 27, 2026 to pay administrative fees.

Insider Trade Summary 10b5-1

Net Seller: 32,667 shares ($57,487)

Net Sell 2 txns

Insider Shafer Andrew

Role Chief Mktg Cust & Brnd Officer

Sold 32,667 shs ($57K)

Type	Security	Shares	Price	Value
Sale	Common Stock	32,667	$1.7598	$57K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 321,051 shares (Direct, null); Common Stock — 16,858.96 shares (Indirect, By 401(k) Plan)

Footnotes (1)

Represents shares sold by the Reporting Person to cover tax withholding obligations upon vesting of a restricted stock award. The reported sales were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person on November 19, 2025. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.74 to $1.80 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Between May 20, 2026 and May 27, 2026, the reporting person disposed of 6.29 shares of the issuer's common stock under the issuer's 401(k) plan to cover administrative fees. The information in this report is based on a plan statement dated May 22, 2026.

Key Figures

Shares sold: 32,667 shares Weighted average sale price: $1.7598 per share Direct holdings after sale: 321,051 shares +2 more

5 metrics

Shares sold 32,667 shares Common stock sold on May 27, 2026

Weighted average sale price $1.7598 per share Sale to cover tax withholding

Direct holdings after sale 321,051 shares Common stock directly owned after May 27, 2026 transaction

Indirect 401(k) holdings 16,858.96 shares Common stock held via Gevo 401(k) plan

401(k) shares disposed 6.29 shares Disposed between May 20–27, 2026 to cover administrative fees

Key Terms

restricted stock award, Rule 10b5-1 trading plan, weighted average price, 401(k) plan, +1 more

5 terms

restricted stock award financial

"upon vesting of a restricted stock award."

A restricted stock award is company shares given to an employee or executive that cannot be sold or fully owned until certain conditions—like staying with the company for a set time or hitting performance targets—are met. Think of it as a gift that only becomes yours after you fulfill specific obligations; for investors, these awards matter because they can increase the total shares outstanding when they vest, reveal how management is being paid and motivated, and create potential selling pressure when restrictions lift.

Rule 10b5-1 trading plan financial

"effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person"

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.

weighted average price financial

"The reported price 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.

401(k) plan financial

"the issuer's 401(k) plan to cover administrative fees."

A 401(k) plan is a workplace retirement account that lets employees set aside part of their pay into a tax-advantaged savings pot, often with employers adding matching contributions — like a workplace piggy bank for future income. It matters to investors because the amount people save and how employers fund these plans influence consumer spending, corporate payroll costs and the flow of money into financial markets, which can affect stock prices and company valuations.

tax withholding obligations financial

"to cover tax withholding obligations upon vesting of a restricted stock award."

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Form 4 Insider Transactions: What Each Field Means →

05/29/2026 - 05:36 PM

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^*

Shafer Andrew

(Last)

(First)

(Middle)

C/O GEVO, INC. 345 INVERNESS DRIVE SOUTH

BUILDING C, SUITE 310

(Street)

ENGLEWOOD

COLORADO

80112

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Gevo, Inc. [ GEVO ]

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

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	Chief Mktg Cust & Brnd Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/27/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	05/27/2026		S⁽¹⁾		32,667	D	$1.7598⁽²⁾	321,051	D
Common Stock								16,858.96⁽³⁾	I	By 401(k) Plan

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. Represents shares sold by the Reporting Person to cover tax withholding obligations upon vesting of a restricted stock award. The reported sales were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person on November 19, 2025.

2. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.74 to $1.80 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

3. Between May 20, 2026 and May 27, 2026, the reporting person disposed of 6.29 shares of the issuer's common stock under the issuer's 401(k) plan to cover administrative fees. The information in this report is based on a plan statement dated May 22, 2026.

Remarks:

	/s/ E. Cabell Massey, Attorney-in-Fact	05/29/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did Gevo (GEVO) report for Andrew Shafer?

Andrew Shafer reported selling 32,667 shares of Gevo common stock. The shares were sold on May 27, 2026 at a weighted average price of $1.7598 per share, primarily to cover tax withholding obligations tied to a restricted stock award.

Why did Gevo officer Andrew Shafer sell 32,667 GEVO shares?

The 32,667 shares were sold to cover tax withholding obligations from the vesting of a restricted stock award. The filing states these sales were executed under a pre-arranged Rule 10b5-1 trading plan adopted by Shafer, making the timing pre-scheduled.

At what price were Andrew Shafer’s Gevo shares sold in this Form 4?

The reported sale used a weighted average price of $1.7598 per share. Footnotes explain the 32,667 shares were sold in multiple transactions at prices ranging from $1.74 to $1.80 per share, all recorded for this Form 4.

What does the Rule 10b5-1 trading plan note mean in Gevo’s Form 4?

The filing specifies the sales were made under a Rule 10b5-1 trading plan adopted on November 19, 2025. Such plans pre-schedule trades in advance, indicating the timing of these tax-related sales was planned rather than a discretionary market-timing decision.

What activity occurred in Andrew Shafer’s Gevo 401(k) holdings?

Between May 20 and May 27, 2026, Shafer disposed of 6.29 shares of Gevo common stock within the company’s 401(k) plan. The filing states this small share disposal covered administrative fees based on a plan statement dated May 22, 2026.