Filing Details
- Accession Number:
- 0001641172-25-010930
- Form Type:
- 13G Filing
- Publication Date:
- 2025-05-14 20:00:00
- Filed By:
- Tyndall Capital Partners
- Company:
- Cyclerion Therapeutics Inc. (NASDAQ:CYCN)
- Filing Date:
- 2025-05-15
- SEC Url:
- 13G Filing
Ownership Summary
Please notice the below summary table is generated without human intervention and may contain errors. Please refer to the complete filing displayed below for exact figures.
| Name | Beneficially Owned Number of Shares | Beneficially Owned Number of Aggregate Shares | Percent of Class |
|---|---|---|---|
| Tyndall Capital Partners, L.P. | 0 | 164,777 | 5.1% |
Filing
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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549 |
SCHEDULE 13G
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UNDER THE SECURITIES EXCHANGE ACT OF 1934
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(Amendment No. 2)
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Cyclerion Therapeutics, Inc. (Name of Issuer) |
Common Stock, no par value (Title of Class of Securities) |
23255M204 (CUSIP Number) |
03/31/2025 (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)
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 Rule 13d-1(c)
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| Rule 13d-1(d)
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SCHEDULE 13G
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| CUSIP No. | 23255M204 |
| 1 | Names of Reporting Persons
Tyndall Capital Partners, L.P. | ||||||||
| 2 | Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
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| 3 | Sec Use Only | ||||||||
| 4 | Citizenship or Place of Organization
DELAWARE
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| Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
| 9 | Aggregate Amount Beneficially Owned by Each Reporting Person
164,777.00 | ||||||||
| 10 | Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
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| 11 | Percent of class represented by amount in row (9)
5.1 % | ||||||||
| 12 | Type of Reporting Person (See Instructions)
PN |
Comment for Type of Reporting Person: See Item 2 for additional information.
SCHEDULE 13G
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| Item 1. | ||
| (a) | Name of issuer:
Cyclerion Therapeutics, Inc. | |
| (b) | Address of issuer's principal executive offices:
245 First Street, 18th Floor, Cambridge, Massachusetts | |
| Item 2. | ||
| (a) | Name of person filing:
The reporting person is Tyndall Capital Partners, L.P. ("Reporting Person"). As of March 31, 2025, 164,777 shares are owned by Tyndall Partners, L.P., a Delaware limited partnership ("Tyndall"). Reporting Person is the general partner of Tyndall, and possesses the sole power to vote and the sole power to direct the disposition of all shares held by Tyndall. | |
| (b) | Address or principal business office or, if none, residence:
150 East 58th Street, 14th Floor, New York, New York 10155 | |
| (c) | Citizenship:
Delaware | |
| (d) | Title of class of securities:
Common Stock, no par value | |
| (e) | CUSIP No.:
23255M204 | |
| 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);
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| (d) | Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
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| (e) | An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
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| (f) | An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
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| (g) | A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
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| (h) | A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
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| (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);
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| (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:
164,777 | |
| (b) | Percent of class:
5.1% | |
| (c) | Number of shares as to which the person has:
| |
| (i) Sole power to vote or to direct the vote:
164,777 | ||
| (ii) Shared power to vote or to direct the vote:
0 | ||
| (iii) Sole power to dispose or to direct the disposition of:
164,777 | ||
| (iv) Shared power to dispose or to direct the disposition of:
0 | ||
| 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. | |
Not Applicable
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| Item 8. | Identification and Classification of Members of the Group. | |
Not Applicable
| ||
| Item 9. | Notice of Dissolution of Group. | |
Not Applicable
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| 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.
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