Synlogic, Inc. received a Schedule 13G reporting that investment entities affiliated with Baselake Partners, LP, including Baselake Management, LLC and individual investor David Paolella, beneficially own 1,140,000 shares of Synlogic common stock. This represents 9.7% of the outstanding common stock, based on the issuer’s report that 11,698,919 shares were outstanding as of November 6, 2025.
The shares are held by Baselake Partners, LP, with Baselake Management, LLC as investment manager and Paolella as managing member, and they report shared voting and dispositive power over all 1,140,000 shares and no sole voting or dispositive power. The filing states that the securities were not acquired and are not held for the purpose of changing or influencing control of Synlogic.
Positive
None.
Negative
None.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
Synlogic, Inc.
(Name of Issuer)
Common Stock, par value $0.001 per share
(Title of Class of Securities)
87166L209
(CUSIP Number)
01/20/2026
(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.
87166L209
1
Names of Reporting Persons
Baselake Partners, 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
1,140,000.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,140,000.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,140,000.00
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)
9.7 %
12
Type of Reporting Person (See Instructions)
PN
Comment for Type of Reporting Person: Please see note in Item 4(a)
SCHEDULE 13G
CUSIP No.
87166L209
1
Names of Reporting Persons
Baselake Management, 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
1,140,000.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,140,000.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,140,000.00
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)
9.7 %
12
Type of Reporting Person (See Instructions)
IA, OO
Comment for Type of Reporting Person: Please see note in Item 4(a)
SCHEDULE 13G
CUSIP No.
87166L209
1
Names of Reporting Persons
David Paolella
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
1,140,000.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,140,000.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,140,000.00
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)
9.7 %
12
Type of Reporting Person (See Instructions)
HC, IN
Comment for Type of Reporting Person: Please see note in Item 4(a)
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Synlogic, Inc.
(b)
Address of issuer's principal executive offices:
PO BOX 30
Winchester, Massachusetts 01890
Item 2.
(a)
Name of person filing:
Baselake Partners, LP*
Baselake Management, LLC*
David Paolella*
(b)
Address or principal business office or, if none, residence:
3155 W. Big Beaver Road, Suite 207, Troy, Michigan 48084
(c)
Citizenship:
Baselake Partners, LP - Delaware
Baselake Management, LLC - Delaware
David Paolella - United States of America
(d)
Title of class of securities:
Common Stock, par value $0.001 per share
(e)
CUSIP No.:
87166L209
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:
Baselake Partners, LP - 1,140,000*
Baselake Management, LLC - 1,140,000*
David Paolella - 1,140,000*
The Common Stock (the "Shares") reported herein are held by Baselake Partners, LP (the "Fund"). Baselake Management, LLC serves as the investment manager to the Fund (the "Investment Manager"). David Paolella serves as the managing member of the Investment Manager (the "Managing Member," and collectively with the Fund and the Investment Manager, the "Reporting Persons"). By virtue of these relationships, the Reporting Persons may be deemed to have shared voting and dispositive power with respect to the Shares owned directly by the Fund. The percentages reported herein are calculated based upon a statement in the Issuer's 10-Q, indicating that there are 11,698,919 Shares issued and outstanding as of November 6, 2025. This report shall not be deemed an admission that the Reporting Persons are beneficial owners of the Shares for purposes of Section 13 of the Securities Exchange Act of 1934, as amended, or for any other purpose. Each of the Reporting Persons disclaims beneficial ownership of the Shares reported herein except to the extent of the Reporting Persons pecuniary interest therein.
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
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.
Baselake Partners, LP
Signature:
/s/ David Paolella
Name/Title:
David Paolella, Managing Member of Baselake Management, LLC, its investment manager
What stake in Synlogic, Inc. (SYBX) does Baselake Partners report on this Schedule 13G?
The filing reports that Baselake Partners, LP and related reporting persons beneficially own 1,140,000 shares of Synlogic common stock, representing 9.7% of the class.
Who are the reporting persons on the Synlogic (SYBX) Schedule 13G?
The reporting persons are Baselake Partners, LP, Baselake Management, LLC, and David Paolella, who is the managing member of Baselake Management, LLC.
How is voting and dispositive power over Synlogic (SYBX) shares allocated among the Baselake reporting persons?
Each reporting person reports 0 shares with sole voting and dispositive power and 1,140,000 shares with shared voting and dispositive power.
What ownership percentage basis is used in the Baselake Schedule 13G for Synlogic (SYBX)?
The 9.7% ownership is calculated using Synlogic’s statement that 11,698,919 shares of common stock were issued and outstanding as of November 6, 2025.
Does the Baselake Schedule 13G state an intent to influence control of Synlogic (SYBX)?
The certification states that the securities were not acquired and are not held for the purpose of changing or influencing the control of Synlogic and are not held in connection with any such transaction, other than activities solely in connection with a nomination under Rule 240.14a-11.
What class of Synlogic (SYBX) securities is covered by this Schedule 13G?
The Schedule 13G covers common stock of Synlogic, Inc., with a par value of $0.001 per share, CUSIP 87166L209.
