Tecogen CFO granted 29K restricted shares June 26

Tecogen’s CFO received a time-vested restricted stock award and corrected his reported post‑grant share holdings.

This filing corrects an earlier one, and you can read the original Form 4 if you want to see what changed.

Rhea-AI Filing Summary

TECOGEN INC. (symbol: TGEN) is the issuer of record for a Form 4/A filing submitted to the SEC. Deschenes Roger P. reported acquisition or exercise transactions in this Form 4 filing.

TECOGEN INC. (TGEN) reported that Chief Financial Officer Roger P. Deschenes received a grant of 29,013 shares of Common Stock on June 26, 2026 as a Restricted Stock Award under the Tecogen Inc. 2022 Stock Incentive Plan, with restrictions lapsing 25% per year. Following this equity award, Deschenes is reported to beneficially own 81,975 shares of Tecogen common stock. The amendment corrects the number of shares beneficially owned that was previously reported on June 30, 2026, and no Rule 10b5-1 trading plan is reported for this award.

Insider Trade Summary

Grant/Award: 29,013 shares

Grant/Award 1 txn

Insider Deschenes Roger P.

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1, F2, F3	29,013	$0.00	$0.00

Holdings After Transaction: Common Stock — 81,975 shares (Direct)

Footnotes (3)

1. F1. Restricted Stock Award pursuant to Tecogen Inc. 2022 Stock Incentive Plan. Restrictions lapse 25% per year.
2. F2. Not applicable
3. F3. Corrected number of shares beneficially owned following restricted stock grant previously reported on June 30, 2026.

Key Figures

Restricted Stock Award shares: 29,013 shares Price per share for award: $0.00 per share Shares beneficially owned after transaction: 81,975 shares +2 more

5 metrics

Restricted Stock Award shares 29,013 shares Grant of Common Stock to CFO on June 26, 2026

Price per share for award $0.00 per share Reported transaction price for the Restricted Stock Award

Shares beneficially owned after transaction 81,975 shares CFO’s Tecogen common stock holdings following the June 26, 2026 award

Vesting schedule 25% per year Restrictions on the Restricted Stock Award lapse annually in four equal parts

Number of acquisition transactions reported 1 transaction Single grant, award, or other acquisition reported in this Form 4/A

Key Terms

Restricted Stock Award, 2022 Stock Incentive Plan, beneficially owned

3 terms

Restricted Stock Award financial

"Restricted Stock Award pursuant to Tecogen Inc. 2022 Stock Incentive Plan."

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.

2022 Stock Incentive Plan financial

"Restricted Stock Award pursuant to Tecogen Inc. 2022 Stock Incentive Plan."

beneficially owned financial

"Corrected number of shares beneficially owned following restricted stock grant"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

FAQ

What insider transaction did Tecogen Inc. (TGEN) disclose in this Form 4/A?

Tecogen disclosed that its CFO, Roger P. Deschenes, received a grant of 29,013 shares of common stock as a Restricted Stock Award on June 26, 2026 under the 2022 Stock Incentive Plan, with no cash price per share reported for the grant.

How many Tecogen (TGEN) shares does the CFO hold after this restricted stock grant?

After the June 26, 2026 Restricted Stock Award, CFO Roger P. Deschenes is reported to beneficially own 81,975 shares of Tecogen common stock. This Form 4/A corrects the previously reported post‑grant holdings figure from the original June 30, 2026 filing.

What are the vesting terms of the Tecogen (TGEN) restricted stock awarded to the CFO?

The filing states that the grant is a Restricted Stock Award under the Tecogen Inc. 2022 Stock Incentive Plan and that restrictions lapse 25% per year, implying the award vests in four equal annual installments, subject to those restrictions lapsing.

Was the Tecogen (TGEN) CFO’s equity grant made under a Rule 10b5-1 trading plan?

No. The filing’s Rule 10b5-1 checkbox is marked such that no Rule 10b5-1 trading plan is reported for this transaction. The award is described as a Restricted Stock Award under the company’s 2022 Stock Incentive Plan.

Why is this Tecogen (TGEN) Form 4/A an amendment rather than an original filing?

The amendment states it was filed to correct the number of shares beneficially owned following the restricted stock grant that had been previously reported on June 30, 2026. The corrected post‑transaction holdings are now reported as 81,975 shares.

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

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 09/08/2026 - 05:11 PM Accepted by SEC EDGAR 09/08/2026 - 05:10 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^*

Deschenes Roger P.

(Last) (First) (Middle)

76 TREBLE COVE ROAD

(Street)

NORTH BILLERICA MASSACHUSETTS 01862

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
TECOGEN INC. [ TGEN ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/26/2026

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)
06/30/2026

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(1)	06/26/2026		A		29,013	A	$0(2)	81,975(3)	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. Restricted Stock Award pursuant to Tecogen Inc. 2022 Stock Incentive Plan. Restrictions lapse 25% per year.

2. Not applicable

3. Corrected number of shares beneficially owned following restricted stock grant previously reported on June 30, 2026.

Remarks:

Filed to amend Form 4 filed by Reporting Person on June 30, 2026.

	/s/ Roger P. Deschenes	09/08/2026
	** 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)