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[SCHEDULE 13G/A] Tecogen Inc. SEC Filing

Filing Impact
(Low)
Filing Sentiment
(Neutral)
Form Type
SCHEDULE 13G/A
Rhea-AI Filing Summary

Tecogen Inc. Schedule 13G/A: Tryfon Natsis and Despoina Pantopoulou report joint beneficial ownership of 460,300 shares of Tecogen common stock, representing 1.8% of the class based on 25,269,362 shares outstanding as of May 20, 2025. The reporting persons hold shared voting and dispositive power over all 460,300 shares and have no sole voting or dispositive power. Each reporting person is a citizen of Greece and lists a residence in Abu Dhabi. The filing includes a certification that the shares were not acquired to change or influence control of the issuer.

Tecogen Inc. Schedule 13G/A: Tryfon Natsis e Despoina Pantopoulou dichiarano una proprietà beneficiaria congiunta di 460.300 azioni ordinarie Tecogen, pari al 1,8% della classe su un totale di 25.269.362 azioni in circolazione al 20 maggio 2025. I soggetti segnalanti detengono potere di voto e potere dispositivi condivisi su tutte le 460.300 azioni e non possiedono poteri di voto o dispositivi in via esclusiva. Ciascun segnalante è cittadino greco e indica come residenza Abu Dhabi. Nel deposito è inclusa una certificazione che le azioni non sono state acquisite per modificare o influenzare il controllo dell'emittente.

Tecogen Inc. Schedule 13G/A: Tryfon Natsis y Despoina Pantopoulou informan de la propiedad beneficiaria conjunta de 460.300 acciones ordinarias de Tecogen, que representan el 1,8% de la clase sobre un total de 25.269.362 acciones en circulación a 20 de mayo de 2025. Las personas informantes tienen poder de voto y poder dispositive compartidos sobre las 460.300 acciones y no poseen poder de voto ni dispositive en forma individual. Cada informante es ciudadano de Grecia y declara residencia en Abu Dabi. La presentación incluye una certificación de que las acciones no se adquirieron para cambiar o influir en el control del emisor.

Tecogen Inc. Schedule 13G/A: Tryfon Natsis와 Despoina PantopoulouëŠ� Tecogen 보통ì£� 460,300주를 ê³µë™ìœ¼ë¡œ 실소유하ê³� 있다ê³� 보고했으ë©�, ì´ëŠ” 2025ë…� 5ì›� 20ì� 기준 유통 주ì‹ìˆ� 25,269,362ì£¼ì˜ 1.8%ì—� 해당합니ë‹�. ë³´ê³ ì¸ë“¤ì€ 460,300ì£� ì „ì²´ì—� 대í•� ê³µë™ ì˜ê²°ê¶� ë°� 처분ê¶�ì� 보유하고 있으ë©� ë‹¨ë… ì˜ê²°ê¶Œì´ë‚� ì²˜ë¶„ê¶Œì€ ì—†ìŠµë‹ˆë‹¤. ê°� ë³´ê³ ì¸ì€ 그리ìŠ� ì‹œë¯¼ê¶Œì„ ë³´ìœ í•˜ë©° 거주지ë¡� 아부다비ë¥� 기재했습니다. 신고서ì—ëŠ� 해당 주ì‹ì� 발행ì¸ì˜ 지배권ì� 변경하거나 ì˜í–¥ë ¥ì„ 행사하기 위해 ì·¨ë“ë� ê²ƒì´ ì•„ë‹˜ì� 확ì¸í•˜ëŠ” ì¦ëª…서가 í¬í•¨ë˜ì–´ 있습니다.

Tecogen Inc. Schedule 13G/A : Tryfon Natsis et Despoina Pantopoulou déclarent une propriété bénéficiaire conjointe de 460 300 actions ordinaires Tecogen, représentant 1,8 % de la catégorie sur un total de 25 269 362 actions en circulation au 20 mai 2025. Les personnes déclarantes détiennent le pouvoir de vote et le pouvoir discrétionnaire partagés sur l’ensemble des 460 300 actions et n’ont aucun pouvoir de vote ou discrétionnaire individuel. Chaque déclarant est citoyen grec et indique Abu Dhabi comme lieu de résidence. Le dépôt comprend une attestation indiquant que les actions n’ont pas été acquises dans le but de modifier ou d’influencer le contrôle de l’émetteur.

Tecogen Inc. Schedule 13G/A: Tryfon Natsis und Despoina Pantopoulou melden gemeinschaftliches wirtschaftliches Eigentum an 460.300 Tecogen-Stammaktien, was 1,8% der Klasse bei insgesamt 25.269.362 ausstehenden Aktien zum 20. Mai 2025 entspricht. Die meldenden Personen haben gemeinsames Stimm� und Verfügungsrecht über alle 460.300 Aktien und besitzen kein alleiniges Stimm� oder Verfügungsrecht. Jeder Meldende ist griechischer Staatsbürger und gibt Abu Dhabi als Wohnsitz an. Die Einreichung enthält eine Bescheinigung, dass die Aktien nicht erworben wurden, um die Kontrolle über den Emittenten zu ändern oder zu beeinflussen.

Positive
  • Regulatory transparency: The reporting persons filed a Schedule 13G/A disclosing beneficial ownership as required.
  • Non-controlling stake: Ownership of 1.8% is below 5%, indicating no reported intent to influence control.
  • Clear power allocation: Filing specifies shared voting and dispositive power for all reported shares.
Negative
  • None.

Insights

TL;DR A disclosed 1.8% stake is material for transparency but not a control position; no purchase timing or cost information is provided.

The filing documents a small, non-controlling joint stake of 460,300 shares in Tecogen, representing 1.8% of outstanding common stock based on the prospectus share count. Because the reporting persons report only shared voting and dispositive power and explicitly certify the holdings are not intended to influence control, this disclosure appears routine and primarily serves regulatory transparency. The filing does not disclose acquisition dates, price paid, or any plans regarding future transactions, limiting analysis of intent or economic exposure.

TL;DR Filing shows compliant disclosure by joint holders with shared control; holding size is below thresholds that typically trigger control concerns.

The joint tenants have properly reported beneficial ownership under Schedule 13G/A. At 1.8% ownership, the stake is below 5%, consistent with the document's statement that the position constitutes ownership of 5 percent or less of a class. The certification clarifies the absence of intent to influence issuer control. There is no indication of group formation, agreements, or plans that would alter governance dynamics based on the information provided.

Tecogen Inc. Schedule 13G/A: Tryfon Natsis e Despoina Pantopoulou dichiarano una proprietà beneficiaria congiunta di 460.300 azioni ordinarie Tecogen, pari al 1,8% della classe su un totale di 25.269.362 azioni in circolazione al 20 maggio 2025. I soggetti segnalanti detengono potere di voto e potere dispositivi condivisi su tutte le 460.300 azioni e non possiedono poteri di voto o dispositivi in via esclusiva. Ciascun segnalante è cittadino greco e indica come residenza Abu Dhabi. Nel deposito è inclusa una certificazione che le azioni non sono state acquisite per modificare o influenzare il controllo dell'emittente.

Tecogen Inc. Schedule 13G/A: Tryfon Natsis y Despoina Pantopoulou informan de la propiedad beneficiaria conjunta de 460.300 acciones ordinarias de Tecogen, que representan el 1,8% de la clase sobre un total de 25.269.362 acciones en circulación a 20 de mayo de 2025. Las personas informantes tienen poder de voto y poder dispositive compartidos sobre las 460.300 acciones y no poseen poder de voto ni dispositive en forma individual. Cada informante es ciudadano de Grecia y declara residencia en Abu Dabi. La presentación incluye una certificación de que las acciones no se adquirieron para cambiar o influir en el control del emisor.

Tecogen Inc. Schedule 13G/A: Tryfon Natsis와 Despoina PantopoulouëŠ� Tecogen 보통ì£� 460,300주를 ê³µë™ìœ¼ë¡œ 실소유하ê³� 있다ê³� 보고했으ë©�, ì´ëŠ” 2025ë…� 5ì›� 20ì� 기준 유통 주ì‹ìˆ� 25,269,362ì£¼ì˜ 1.8%ì—� 해당합니ë‹�. ë³´ê³ ì¸ë“¤ì€ 460,300ì£� ì „ì²´ì—� 대í•� ê³µë™ ì˜ê²°ê¶� ë°� 처분ê¶�ì� 보유하고 있으ë©� ë‹¨ë… ì˜ê²°ê¶Œì´ë‚� ì²˜ë¶„ê¶Œì€ ì—†ìŠµë‹ˆë‹¤. ê°� ë³´ê³ ì¸ì€ 그리ìŠ� ì‹œë¯¼ê¶Œì„ ë³´ìœ í•˜ë©° 거주지ë¡� 아부다비ë¥� 기재했습니다. 신고서ì—ëŠ� 해당 주ì‹ì� 발행ì¸ì˜ 지배권ì� 변경하거나 ì˜í–¥ë ¥ì„ 행사하기 위해 ì·¨ë“ë� ê²ƒì´ ì•„ë‹˜ì� 확ì¸í•˜ëŠ” ì¦ëª…서가 í¬í•¨ë˜ì–´ 있습니다.

Tecogen Inc. Schedule 13G/A : Tryfon Natsis et Despoina Pantopoulou déclarent une propriété bénéficiaire conjointe de 460 300 actions ordinaires Tecogen, représentant 1,8 % de la catégorie sur un total de 25 269 362 actions en circulation au 20 mai 2025. Les personnes déclarantes détiennent le pouvoir de vote et le pouvoir discrétionnaire partagés sur l’ensemble des 460 300 actions et n’ont aucun pouvoir de vote ou discrétionnaire individuel. Chaque déclarant est citoyen grec et indique Abu Dhabi comme lieu de résidence. Le dépôt comprend une attestation indiquant que les actions n’ont pas été acquises dans le but de modifier ou d’influencer le contrôle de l’émetteur.

Tecogen Inc. Schedule 13G/A: Tryfon Natsis und Despoina Pantopoulou melden gemeinschaftliches wirtschaftliches Eigentum an 460.300 Tecogen-Stammaktien, was 1,8% der Klasse bei insgesamt 25.269.362 ausstehenden Aktien zum 20. Mai 2025 entspricht. Die meldenden Personen haben gemeinsames Stimm� und Verfügungsrecht über alle 460.300 Aktien und besitzen kein alleiniges Stimm� oder Verfügungsrecht. Jeder Meldende ist griechischer Staatsbürger und gibt Abu Dhabi als Wohnsitz an. Die Einreichung enthält eine Bescheinigung, dass die Aktien nicht erworben wurden, um die Kontrolle über den Emittenten zu ändern oder zu beeinflussen.






Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)






SCHEDULE 13G




Comment for Type of Reporting Person: Percent of class represented by amount in row (9) has been calculated based on 25,269,362 shares of Tecogen Inc. common stock outstanding as of May 20, 2025, as reported in Tecogen Inc.'s prospectus on Form 424B3 filed with the Securities and Exchange Commission on May 22, 2025.


SCHEDULE 13G



Tryfon Natsis and Depoina Pantopoulou, as Joint Tenants with the Right of Survivorship
Signature:/s/ Tryfon Natsis
Name/Title:Tryfon Natsis, in his capacity as a Joint Tenant with the Right of Survivorship
Date:08/14/2025
Signature:/s/ Despoina Pantopoulou
Name/Title:Despoina Pantopoulou, in her capacity as a Joint Tenant with the Right of Survivorship
Date:08/14/2025

FAQ

How many Tecogen (TGEN) shares do Tryfon Natsis and Despoina Pantopoulou own?

They report beneficial ownership of 460,300 shares of Tecogen common stock.

What percentage of Tecogen does the 460,300 shares represent?

The filing states this equals 1.8% of Tecogen's common stock based on 25,269,362 shares outstanding as of May 20, 2025.

Do the reporting persons have sole voting or dispositive power over the shares?

No. The filing indicates 0 shares with sole voting or dispositive power and 460,300 shares with shared voting and dispositive power.

Did the filers state an intent to influence control of Tecogen?

No. The certification states the securities were not acquired and are not held to change or influence control of the issuer.

What is the residence and citizenship of the reporting persons?

Each reporting person is a citizen of Greece and lists a residential address in Abu Dhabi, United Arab Emirates.
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