TGEN Insider Activity: Earl R. Lewis Receives 25k Stock Options

Rhea-AI Filing Summary

Form 4 filing synopsis: Tecogen Inc. (TGEN) director Earl R. Lewis was granted 25,000 non-qualified stock options on 07/24/2025 at an exercise price of $8.35 per share. The award vests 25 % each year and carries a 10-year term, expiring 07/24/2035. No common shares were bought or sold and no cash changed hands at the time of grant.

After this transaction, Lewis holds 91,250 derivative securities (options) in total, all recorded as direct ownership. The filing represents routine equity compensation aimed at aligning the director’s incentives with long-term shareholder value. Because the transaction involves options rather than immediate share issuance, near-term cash flow and ownership percentages are unaffected; any dilution would occur only if the options are exercised in the future.

Insights

Securities Analyst

TL;DR: Routine option grant; neutral on valuation, marginal future dilution risk.

The grant of 25,000 options to Director Earl R. Lewis is standard board compensation. The strike price of $8.35 sets a hurdle that must be surpassed for intrinsic value, promoting long-term alignment. Post-grant holdings rise to 91,250 options, but no immediate share issuance or insider buying/selling occurred, so trading sentiment and liquidity remain unchanged. Potential dilution is minor and deferred until exercise, leaving current EPS and free float intact. Overall, the filing is informational with neutral investment impact.

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
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

LEWIS EARL R

(Last) (First) (Middle)

C/O TECOGEN INC.

76 TREBLE COVE ROAD

(Street)

NORTH BILLERICA MA 01862

(City) (State) (Zip)

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

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

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

3. Date of Earliest Transaction (Month/Day/Year)
07/24/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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

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
Stock Option (Right to Buy)	$8.35	07/24/2025		A		25,000		07/24/2026(1)	07/24/2035	Common Stock	25,000	$8.35	91,250	D

Explanation of Responses:

1. Vests 25% per year

Remarks:

	/s/ Earl R. Lewis	07/28/2025
	** 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.

FAQ

What did Tecogen (TGEN) report in the latest Form 4?

Director Earl R. Lewis received 25,000 stock options at a strike price of $8.35 on 07/24/2025.

How many Tecogen options does Earl R. Lewis own after the grant?

He now beneficially owns 91,250 derivative securities (stock options).

When do the newly granted Tecogen options vest?

They vest 25 % per year, fully vesting after four years.

What is the expiration date of the Tecogen options?

The options expire on 07/24/2035.

Did the filing indicate any sale or purchase of common shares?

No, the Form 4 shows no common shares were bought or sold.