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.
Positive
None.
Negative
None.
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)
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]
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