SYNLOGIC, INC. - Common Stock, par value $0.001 per share (SYBX)
CUSIP: 87166L209
Q3 2025 13F Holders as of 30 Sep 2025
- Type / Class
- Equity / Common Stock, par value $0.001 per share
- Shares outstanding
- 11,703,954
- Total 13F shares
- 6,655,293
- Share change
- -116,582
- Total reported value
- $11,108,525
- Price per share
- $1.69
- Number of holders
- 23
- Value change
- -$178,424
- Number of buys
- 10
- Number of sells
- 7
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.
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- Back to full security ownership history for the broader multi-quarter picture.
- Latest 13F filings for newly reported positions across managers.
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Explore More Reporting Periods
Jump to adjacent filing periods for faster comparison and easier crawl discovery.
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
|
$4,206,518 | — | 30 Jun 2025 | |
| NEA Management Company, LLC |
13F
|
Company |
25%
|
2,922,772
|
$3,711,921 | — | 30 Jun 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 | |
| John A. Kryzanowski |
13D/G
|
Kryzanowski, John A. |
6.3%
|
733,412
|
$249,360 | $0 | 31 Dec 2024 | |
| VANGUARD GROUP INC |
13F
|
Company |
1.6%
|
183,002
|
$232,413 | — | 30 Jun 2025 | |
| FMR LLC |
13F
|
Company |
1.4%
|
166,001
|
$210,821 | — | 30 Jun 2025 | |
| 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 |
0.57%
|
66,238
|
$84,127 | — | 30 Jun 2025 | |
| Antoine Awad |
3/4/5
|
Chief Operating Officer |
—
mixed-class rows
|
50,525
mixed-class rows
|
$58,576 | — | 02 Apr 2024 | |
| RENAISSANCE TECHNOLOGIES LLC |
13F
|
Company |
0.2%
|
23,810
|
$30,239 | — | 30 Jun 2025 | |
| FIDUCIARY TRUST CO |
13F
|
Company |
0.19%
|
22,352
|
$28,387 | — | 30 Jun 2025 | |
| Michael Vangsted Jensen |
3/4/5
|
Chief Financial Officer |
—
mixed-class rows
|
53,613
mixed-class rows
|
$27,032 | — | 10 Nov 2023 | |
| Ikarian Capital, LLC |
13F
|
Company |
0.17%
|
20,422
|
$25,936 | — | 30 Jun 2025 | |
| BlackRock, Inc. |
13F
|
Company |
0.17%
|
19,757
|
$25,091 | — | 30 Jun 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 | |
| Rangeley Capital, LLC |
13F
|
Company |
0.12%
|
13,597
|
$17,268 | — | 30 Jun 2025 | |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP |
13F
|
Company |
0.09%
|
10,180
|
$12,929 | — | 30 Jun 2025 | |
| STATE STREET CORP |
13F
|
Company |
0.09%
|
10,176
|
$12,924 | — | 30 Jun 2025 | |
| MORGAN STANLEY |
13F
|
Company |
0.01%
|
1,125
|
$1,429 | — | 30 Jun 2025 | |
| SBI Securities Co., Ltd. |
13F
|
Company |
0%
|
109
|
$138 | — | 30 Jun 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0%
|
69
|
$87 | — | 30 Jun 2025 | |
| BNP PARIBAS FINANCIAL MARKETS |
13F
|
Company |
0%
|
24
|
$30 | — | 30 Jun 2025 | |
| Hilltop National Bank |
13F
|
Company |
0%
|
20
|
$25 | — | 30 Jun 2025 | |
| DANSKE BANK A/S |
13F
|
Company |
0%
|
1
|
$1 | — | 30 Jun 2025 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
0%
|
1
|
$1 | — | 30 Jun 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 Q3 2025
As of 30 Sep 2025,
SYNLOGIC, INC. - Common Stock, par value $0.001 per share (SYBX) was held by
23 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
6,655,293 shares.
The largest 10 holders included
Cable Car Capital, LP, NEA Management Company, LLC, VANGUARD GROUP INC, GEODE CAPITAL MANAGEMENT, LLC, RENAISSANCE TECHNOLOGIES LLC, CITADEL ADVISORS LLC, Ikarian Capital, LLC, BlackRock, Inc., NORTHERN TRUST CORP, and XTX Topco Ltd.
This page lists
23
institutional shareholders reporting positions in this security
for the Q3 2025 filing period.
| Investor | Option | Weight % | Change % | Value $ | * Price | Shares | Share Change | Activity | Report Period |
|---|
Compare Q3 2025 vs Q2 2025 Across Filers
Q2 2025 holders
19
Q3 2025 holders
23
Holder diff
4
| Investor | Q2 2025 Shares | Q3 2025 Shares | Share Diff | Share Chg % | Q2 2025 Value $ | Q3 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.