SYNLOGIC, INC. - Common Stock, par value $0.001 per share (SYBX)
CUSIP: 87166L209
Q4 2025 13F Holders as of 31 Dec 2025
- Type / Class
- Equity / Common Stock, par value $0.001 per share
- Shares outstanding
- 11,703,954
- Total 13F shares
- 6,879,879
- Share change
- +224,586
- Total reported value
- $7,705,466
- Price per share
- $1.12
- Number of holders
- 25
- Value change
- +$251,520
- Number of buys
- 11
- Number of sells
- 4
Quarterly Holders Quick Answers
What is CUSIP 87166L209?
CUSIP 87166L209 identifies SYBX - SYNLOGIC, INC. - Common Stock, par value $0.001 per share in SEC institutional holdings data.
Need full ownership history?
Open the full security ownership history page.
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These links keep the next click tied to holder verification, nearby quarters, or outside-13F ownership context.
- Back to full security ownership history for the broader multi-quarter picture.
- Latest 13F filings for newly reported positions across managers.
- Latest Schedule 13D/13G reports for ownership changes outside the 13F cadence.
- SEC investors directory for manager drilldown.
Explore More Reporting Periods
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Recent filing periods for CUSIP 87166L209:
Top shareholders of SYBX - SYNLOGIC, INC. - Common Stock, par value $0.001 per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| Cable Car Capital, LP |
13F
|
Company |
28%
|
3,312,219
|
$5,524,781 | — | 30 Sep 2025 | |
| NEA Management Company, LLC |
13F
|
Company |
25%
|
2,922,772
|
$4,875,184 | — | 30 Sep 2025 | |
| Funicular Funds, LP |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
3,312,219
|
$1,907,176 | — | 09 Feb 2024 | |
| New Enterprise Associates 14, L.P. |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
2,922,773
|
$1,682,933 | — | 03 Oct 2023 | |
| Bradley L. Radoff |
13D/G
|
Radoff Bradley Louis |
4.4%
|
520,000
|
$894,400 | $0 | 30 Sep 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
1.7%
|
196,461
|
$332,019 | — | 30 Sep 2025 | |
| John A. Kryzanowski |
13D/G
|
Kryzanowski, John A. |
6.3%
|
733,412
|
$249,360 | $0 | 31 Dec 2024 | |
| Aoife Brennan |
3/4/5
|
President and CEO, Director |
—
mixed-class rows
|
264,967
mixed-class rows
|
$147,578 | — | 10 Nov 2023 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
0.58%
|
67,665
|
$114,362 | — | 30 Sep 2025 | |
| RENAISSANCE TECHNOLOGIES LLC |
13F
|
Company |
0.34%
|
39,510
|
$65,904 | — | 30 Sep 2025 | |
| Antoine Awad |
3/4/5
|
Chief Operating Officer |
—
mixed-class rows
|
50,525
mixed-class rows
|
$58,576 | — | 02 Apr 2024 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
0.25%
|
29,011
|
$49,029 | — | 30 Sep 2025 | |
| Ikarian Capital, LLC |
13F
|
Company |
0.17%
|
20,422
|
$34,513 | — | 30 Sep 2025 | |
| BlackRock, Inc. |
13F
|
Company |
0.17%
|
19,757
|
$32,955 | — | 30 Sep 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.17%
|
19,469
|
$32,474 | — | 30 Sep 2025 | |
| Michael Vangsted Jensen |
3/4/5
|
Chief Financial Officer |
—
mixed-class rows
|
53,613
mixed-class rows
|
$27,032 | — | 10 Nov 2023 | |
| Mary Beth Dooley |
3/4/5
|
Principal Executive Officer and Principal Financial Officer |
0.11%
|
12,744
|
$23,066 | -$284 | 29 Oct 2025 | |
| Richard P. Shea |
3/4/5
|
Director |
0.13%
|
15,506
|
$20,002 | — | 26 Apr 2025 | |
| James P. Flynn |
3/4/5
|
Director |
0.13%
|
15,000
|
$19,350 | — | 26 Apr 2025 | |
| XTX Topco Ltd |
13F
|
Company |
0.1%
|
11,173
|
$18,882 | — | 30 Sep 2025 | |
| STATE STREET CORP |
13F
|
Company |
0.09%
|
10,176
|
$17,197 | — | 30 Sep 2025 | |
| FMR LLC |
13F
|
Company |
0.05%
|
5,323
|
$8,996 | — | 30 Sep 2025 | |
| MORGAN STANLEY |
13F
|
Company |
0.01%
|
1,095
|
$1,826 | — | 30 Sep 2025 | |
| SBI Securities Co., Ltd. |
13F
|
Company |
0%
|
103
|
$172 | — | 30 Sep 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0%
|
64
|
$107 | — | 30 Sep 2025 | |
| BNP PARIBAS FINANCIAL MARKETS |
13F
|
Company |
0%
|
24
|
$40 | — | 30 Sep 2025 | |
| JONES FINANCIAL COMPANIES LLLP |
13F
|
Company |
0%
|
20
|
$35 | — | 30 Sep 2025 | |
| Hilltop National Bank |
13F
|
Company |
0%
|
20
|
$33 | — | 30 Sep 2025 | |
| WELLS FARGO & COMPANY/MN |
13F
|
Company |
0%
|
5
|
$8 | — | 30 Sep 2025 | |
| BARCLAYS PLC |
13F
|
Company |
0%
|
1
|
$2 | — | 30 Sep 2025 | |
| CITIGROUP INC |
13F
|
Company |
0%
|
1
|
$2 | — | 30 Sep 2025 | |
| DANSKE BANK A/S |
13F
|
Company |
0%
|
1
|
$2 | — | 30 Sep 2025 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
0%
|
1
|
$2 | — | 30 Sep 2025 | |
| Gregg Beloff |
3/4/5
|
Interim Chief Financial Officer |
—
class O/S missing
|
50,000
|
— | — | 06 Dec 2021 | |
| Lisa Kelly-Croswell |
3/4/5
|
Director |
—
class O/S missing
|
30,000
|
— | — | 22 Jun 2023 | |
| Mathers Edward T. |
3/4/5
|
Director |
—
class O/S missing
|
30,000
|
— | — | 22 Jun 2023 | |
| Michael F. Burgess |
3/4/5
|
Director |
—
class O/S missing
|
30,000
|
— | — | 22 Jun 2023 | |
| Michael Thomas Heffernan |
3/4/5
|
Director |
—
class O/S missing
|
30,000
|
— | — | 22 Jun 2023 | |
| Nick Leschly |
3/4/5
|
Director |
—
class O/S missing
|
30,000
|
— | — | 22 Jun 2023 | |
| Peter Barrett |
3/4/5
|
Director |
—
class O/S missing
|
24,923
|
— | — | 02 Jan 2024 | |
| Patricia N. Hurter |
3/4/5
|
Director |
—
class O/S missing
|
14,678
|
— | — | 02 Jan 2024 |
Institutional Holders of SYNLOGIC, INC. - Common Stock, par value $0.001 per share (SYBX) as of Q4 2025
As of 31 Dec 2025,
SYNLOGIC, INC. - Common Stock, par value $0.001 per share (SYBX) was held by
25 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
6,879,879 shares.
The largest 10 holders included
Cable Car Capital, LP, NEA Management Company, LLC, VANGUARD GROUP INC, CITADEL ADVISORS LLC, RENAISSANCE TECHNOLOGIES LLC, GEODE CAPITAL MANAGEMENT, LLC, DRW Securities, LLC, Ikarian Capital, LLC, BlackRock, Inc., and NORTHERN TRUST CORP.
This page lists
25
institutional shareholders reporting positions in this security
for the Q4 2025 filing period.
| Investor | Option | Weight % | Change % | Value $ | * Price | Shares | Share Change | Activity | Report Period |
|---|
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
23
Q4 2025 holders
25
Holder diff
2
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 Value $ | Q4 2025 Value $ | Value Diff $ | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.
An asterisk sign (*) next to the price indicates that the price is likely invalid.