[SCHEDULE 13G] TSAKOS ENERGY NAVIGATION LTD SEC Filing

Rhea-AI Filing Summary

CastleKnight entities and Aaron Weitman filed a Schedule 13G reporting a significant passive stake in Tsakos Energy Navigation Limited (TEN). The group disclosed beneficial ownership of 2,251,487 Common Shares, representing 7.5% of the class, with the date of event triggering the filing on 10/14/2025.

The reporting persons have 0 shares with sole voting and dispositive power and 2,251,487 shares with shared voting and shared dispositive power. The aggregate figure includes certain options beneficially owned as described. They certified the securities were not acquired to change or influence control, consistent with a passive investment reported on Schedule 13G.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

TSAKOS ENERGY NAVIGATION LIMITED

(Name of Issuer)

Common Shares, $5.00 par value

(Title of Class of Securities)

G9108L173

(CUSIP Number)

10/14/2025

(Date of Event Which Requires Filing of this Statement)

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

CUSIP No. G9108L173

1

Names of Reporting Persons

CASTLEKNIGHT MASTER FUND LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

CAYMAN ISLANDS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,251,487.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,251,487.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,251,487.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.5 %

12

Type of Reporting Person (See Instructions)

PN

Comment for Type of Reporting Person: This figure includes 9,000 options beneficially owned by the Reporting Persons each exercisable for one hundred shares of Common Shares, $5.00 par value.

SCHEDULE 13G

CUSIP No. G9108L173

1

Names of Reporting Persons

CASTLEKNIGHT FUND GP LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,251,487.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,251,487.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,251,487.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.5 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. G9108L173

1

Names of Reporting Persons

CASTLEKNIGHT MANAGEMENT LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,251,487.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,251,487.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,251,487.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.5 %

12

Type of Reporting Person (See Instructions)

IA, PN

SCHEDULE 13G

CUSIP No. G9108L173

1

Names of Reporting Persons

CASTLEKNIGHT MANAGEMENT GP LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,251,487.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,251,487.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,251,487.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.5 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. G9108L173

1

Names of Reporting Persons

WEITMAN CAPITAL LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

NEW JERSEY

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,251,487.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,251,487.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,251,487.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.5 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. G9108L173

1

Names of Reporting Persons

AARON WEITMAN

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,251,487.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,251,487.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,251,487.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.5 %

12

Type of Reporting Person (See Instructions)

HC, IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: TSAKOS ENERGY NAVIGATION LIMITED
(b)	Address of issuer's principal executive offices: 367 Syngrou Avenue, 175 64 P., Faliro, Athens, Greece
Item 2.
(a)	Name of person filing: CastleKnight Master Fund LP CastleKnight Fund GP LLC CastleKnight Management LP CastleKnight Management GP LLC Weitman Capital LLC Aaron Weitman
(b)	Address or principal business office or, if none, residence: CastleKnight Master Fund LP Maples Corporate Services Limited P.O. Box 309 Ugland House Grand Cayman KY1-1104 Cayman Islands CastleKnight Fund GP LLC 888 Seventh Avenue, 24th Floor New York, New York 10019 United States of America CastleKnight Management LP 888 Seventh Avenue, 24th Floor New York, New York 10019 United States of America CastleKnight Management GP LLC 888 Seventh Avenue, 24th Floor New York, New York 10019 United States of America Weitman Capital LLC c/o Aaron Weitman c/o CastleKnight Management LP 888 Seventh Avenue, 24th Floor New York, New York 10019 United States of America Aaron Weitman c/o CastleKnight Management LP 888 Seventh Avenue, 24th Floor New York, New York 10019 United States of America
(c)	Citizenship: CastleKnight Master Fund LP - Cayman Islands CastleKnight Fund GP LLC - Delaware CastleKnight Management LP - Delaware CastleKnight Management GP LLC - Delaware Weitman Capital LLC - New Jersey Aaron Weitman - United States
(d)	Title of class of securities: Common Shares, $5.00 par value
(e)	CUSIP No.: G9108L173
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: CastleKnight Master Fund LP - 2,251,487 CastleKnight Fund GP LLC - 2,251,487 CastleKnight Management LP - 2,251,487 CastleKnight Management GP LLC - 2,251,487 Weitman Capital LLC - 2,251,487 Aaron Weitman - 2,251,487
(b)	Percent of class: CastleKnight Master Fund LP - 7.5% CastleKnight Fund GP LLC - 7.5% CastleKnight Management LP - 7.5% CastleKnight Management GP LLC - 7.5% Weitman Capital LLC - 7.5% Aaron Weitman - 7.5%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: CastleKnight Master Fund LP - 0 CastleKnight Fund GP LLC - 0 CastleKnight Management LP - 0 CastleKnight Management GP LLC - 0 Weitman Capital LLC - 0 Aaron Weitman - 0
	(ii) Shared power to vote or to direct the vote: CastleKnight Master Fund LP - 2,251,487 CastleKnight Fund GP LLC - 2,251,487 CastleKnight Management LP - 2,251,487 CastleKnight Management GP LLC - 2,251,487 Weitman Capital LLC - 2,251,487 Aaron Weitman - 2,251,487
	(iii) Sole power to dispose or to direct the disposition of: CastleKnight Master Fund LP - 0 CastleKnight Fund GP LLC - 0 CastleKnight Management LP - 0 CastleKnight Management GP LLC - 0 Weitman Capital LLC - 0 Aaron Weitman - 0
	(iv) Shared power to dispose or to direct the disposition of: CastleKnight Master Fund LP - 2,251,487 CastleKnight Fund GP LLC - 2,251,487 CastleKnight Management LP - 2,251,487 CastleKnight Management GP LLC - 2,251,487 Weitman Capital LLC - 2,251,487 Aaron Weitman - 2,251,487
Item 5.	Ownership of 5 Percent or Less of a Class.
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. Please see Exhibit B attached hereto.
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

CASTLEKNIGHT MASTER FUND LP

Signature:	By: CastleKnight Fund GP LLC, its general partner, By: Weitman Capital LLC, its managing member, By: /s/ Aaron Weitman
Name/Title:	Aaron Weitman, Manager
Date:	10/21/2025

CASTLEKNIGHT FUND GP LLC

Signature:	By: Weitman Capital LLC, its managing member, By: /s/ Aaron Weitman
Name/Title:	Aaron Weitman, Manager
Date:	10/21/2025

CASTLEKNIGHT MANAGEMENT LP

Signature:	By: CastleKnight Management GP LLC, its general partner, By: Weitman Capital LLC, its managing member, By: /s/ Aaron Weitman
Name/Title:	Aaron Weitman, Manager
Date:	10/21/2025

CASTLEKNIGHT MANAGEMENT GP LLC

Signature:	By: Weitman Capital LLC, its managing member, By: /s/ Aaron Weitman
Name/Title:	Aaron Weitman, Manager
Date:	10/21/2025

WEITMAN CAPITAL LLC

Signature:	By: /s/ Aaron Weitman
Name/Title:	Aaron Weitman, Manager
Date:	10/21/2025

AARON WEITMAN

Signature:	By: /s/ Aaron Weitman
Name/Title:	Aaron Weitman
Date:	10/21/2025

Comments accompanying signature: * Each Reporting Person disclaims beneficial ownership of the reported securities except to the extent of his or its pecuniary interest therein, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

Exhibit Information

[Exhibit A - Joint Filing Agreement] [Exhibit B - Control Person Identification]

FAQ

What stake in TEN did CastleKnight and Aaron Weitman report on Schedule 13G?

They reported beneficial ownership of 2,251,487 Common Shares, equal to 7.5% of the class.

What is the event date for the TEN Schedule 13G filing by CastleKnight?

The date of event requiring the filing is 10/14/2025.

What voting and dispositive powers were reported for the TEN shares?

They reported 0 shares with sole voting/dispositive power and 2,251,487 shares with shared voting/dispositive power.

Is the CastleKnight TEN ownership intended to influence control of the company?

They certified the securities were not acquired and are not held for the purpose of changing or influencing control.

Which security and CUSIP were reported in the TEN 13G?

The filing covers Common Shares, $5.00 par value, CUSIP G9108L173.

Does the reported TEN stake include options?

Yes. The aggregate amount includes certain options beneficially owned as described in the filing.