[Form 4] Tecogen Inc. Insider Trading Activity

Rhea-AI Filing Summary

Tecogen Inc. (TGEN) — Form 4 filed 07/28/2025

CEO & Director Abinand Rangesh reported equity compensation granted on 07/24/2025:

• Restricted stock: 53,892 common shares acquired at $0 cost; award vests 25 % per year. Direct ownership rises to 64,193 shares.
• Stock options: Two option grants for 24,075 and 12,048 shares (total 36,123) with a $8.35 strike, first tranche exercisable 07/24/2026; options expire 07/24/2035. Aggregate derivative holdings increase to 306,123 options.

No dispositions or open-market purchases were reported. The transactions expand the CEO’s economic stake and aim to align management incentives with shareholder value; dilution impact appears immaterial relative to company float but exact share-count context is not provided.

Positive

• CEO’s direct ownership increases by 53,892 shares, improving management–shareholder alignment.
• No insider sales reported, removing immediate selling pressure.

Negative

• New equity grants introduce incremental dilution, albeit likely minor for shareholders.

Insights

Financial Analyst

TL;DR: CEO receives 54 K RSUs and 36 K options; no sales, neutral-to-slightly positive signal.

The Form 4 shows pure incentive grants—no cash purchases or disposals—so insider sentiment is unchanged. Award size is modest versus micro-cap floats and strike ($8.35) likely above current price, meaning options carry performance leverage. Added 53,892 shares boosts direct stake to 64,193, keeping alignment. Absent selling pressure, market impact should be minimal; nevertheless, fresh dilution (≈0.3 % if float ~13 M) slightly offsets positives. Overall, governance-driven, not operationally material.

Corporate Governance Specialist

TL;DR: Standard annual equity compensation; aligns incentives, limited dilution risk.

Vesting schedules (25 % yearly) encourage multi-year retention. Strike price equal across grants simplifies future disclosure and reduces complexity. No accelerated vesting clauses noted. The mix of RSUs and options balances downside protection and upside motivation. Because awards are service-based and granted at fair-market value, they comply with typical small-cap governance practices. I view the filing as routine; impact on voting power and EPS dilution should be negligible unless additional large grants follow.

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

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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^*

Rangesh Abinand

(Last) (First) (Middle)

45 FIRST AVE

(Street)

WALTHAM MA 02451

(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
X	Officer (give title below)	X	Other (specify below)
	Chief Executive Officer		Chief Financial Officer

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
Common Stock	07/24/2025		A		53,892(1)	A	$0	64,193	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
Stock Option (Right to Buy)	$8.35	07/24/2025		A		24,075		07/24/2026(2)	07/24/2035	Common Stock	24,075	$8.35	294,075	D
Stock Option (Right to Buy)	$8.35	07/24/2025		A		12,048		07/24/2026(2)	07/24/2035	Common Stock	12,048	$8.35	306,123	D

Explanation of Responses:

1. Restricted Stock Award, vests 25% per year

2. Vests 25% per year

Remarks:

	/s/ Abinand Rangesh	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.
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FAQ

How many Tecogen (TGEN) shares did CEO Abinand Rangesh acquire on 24-Jul-2025?

He received 53,892 restricted shares that vest 25 % per year.

What is the CEO’s total direct share ownership after the reported transaction?

His direct holdings increased to 64,193 common shares.

What stock options were granted to the CEO and at what price?

Two option grants totaling 36,123 shares were issued with a $8.35 exercise price.

When do the newly granted options first become exercisable and when do they expire?

They start vesting on 07/24/2026 (25 % per year) and expire on 07/24/2035.

Were any shares sold by the CEO in this Form 4?

No shares were sold; the filing only reports awards and option grants.

Does the filing indicate any change in the CEO’s indirect ownership?

All reported holdings are marked as Direct (D); no indirect ownership changes were disclosed.