Tsakos Energy CFO sells 10,000 shares at $53

TEN’s CFO and CAO sold 10,000 common shares and now holds 14,700 shares directly.

Rhea-AI Filing Summary

TSAKOS ENERGY NAVIGATION LTD (TEN) reports that its Chief Financial Officer and Chief Accounting Officer, Kosmatos Theoharrys Evgenios, sold 10,000 Common Shares on September 18, 2026 in a sale described as an open market or private transaction at $53.0014 per share. Following this transaction, he holds 14,700 Common Shares directly, and no Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Net Seller: 10,000 shares

Net Sell 1 txn

Insider Kosmatos Theoharrys Evgenios

Role CFO and CAO

Sold 10,000 shs ($530K)

Type	Security	Shares	Price	Value
Sale	Common Shares	10,000	$53.0014	$530K

Holdings After Transaction: Common Shares — 14,700 shares (Direct)

Key Figures

Shares sold: 10,000 shares Sale price per share: $53.0014 per share Shares owned after transaction: 14,700 shares +1 more

4 metrics

Shares sold 10,000 shares Common Shares sold on September 18, 2026

Sale price per share $53.0014 per share Price for the 10,000-share sale on September 18, 2026

Shares owned after transaction 14,700 shares Directly owned Common Shares after the sale

Net shares sold in filing 10,000 shares Net sell volume across all reported transactions

Key Terms

Rule 10b5-1, open market, private transaction

3 terms

Rule 10b5-1 regulatory

"The Form 4 indicates the Rule 10b5-1 checkbox is not selected"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

open market financial

"Sale in open market or private transaction"

An open market is a system where buying and selling of goods, services, or financial assets happen freely without restrictions or special controls. For investors, it means they can trade assets easily and quickly, which helps determine fair prices based on supply and demand. This environment encourages transparency and competition, making it easier to buy or sell with confidence.

private transaction financial

"Sale in open market or private transaction"

A private transaction is the sale or transfer of securities, assets, or ownership stakes carried out directly between a small number of parties rather than on a public exchange. For investors it matters because these deals are less visible and often less liquid than public trades, so pricing can be harder to verify, the investment can be harder to sell quickly, and buyers or sellers may gain strategic advantages not available in open markets — like negotiated terms similar to a private garage sale versus a crowded marketplace.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did TEN’s CFO report in this Form 4?

Kosmatos Theoharrys Evgenios, CFO and CAO of TSAKOS ENERGY NAVIGATION LTD (TEN), reported selling 10,000 Common Shares on September 18, 2026. The sale is described as an open market or private transaction, and his ownership position changed accordingly.

At what price were the 10,000 TEN shares sold by the CFO?

The 10,000 TEN Common Shares were sold at a price of $53.0014 per share. The transaction is reported as a sale in an open market or private transaction on September 18, 2026, based on the Form 4 data.

How many TEN shares does the CFO own after this reported sale?

After the reported sale, the CFO and CAO, Kosmatos Theoharrys Evgenios, directly owns 14,700 Common Shares of TEN. This post-transaction holding is stated in the Form 4 as the total shares following the transaction.

Was the TEN CFO’s share sale made under a Rule 10b5-1 trading plan?

No. The Form 4 indicates the Rule 10b5-1 checkbox is not selected, so no Rule 10b5-1 trading plan is reported in connection with this 10,000-share sale by the TEN CFO.

What type of transaction is reported for the TEN CFO’s share sale?

The Form 4 describes the transaction as a sale in open market or private transaction of 10,000 TEN Common Shares. It is classified as a non-derivative transaction involving Common Shares.

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

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Available on EDGAR 09/22/2026 - 04:15 PM Accepted by SEC EDGAR 09/22/2026 - 04:15 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^*

Kosmatos Theoharrys Evgenios

(Last) (First) (Middle)

TSAKOS ENERGY NAVIGATION LIMITED

367 SYNGROU AVE P. FALIRO

(Street)

ATHENS GREECE 17564

(City) (State) (Zip)

GREECE

(Country)

2. Issuer Name and Ticker or Trading Symbol
TSAKOS ENERGY NAVIGATION LTD [ TEN ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/18/2026

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)
			Code	V	Amount	(A) or (D)	Price
Common Shares	09/18/2026		S		10,000	D	$53.0014	14,700	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:

	/s/ Theoharrys Evgenios Kosmatos	09/22/2026
	** 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)