Security key
87166L209
SYNLOGIC, INC. - Common Stock, par value $0.001 per share (SYBX)
CUSIP: 87166L209
Q4 2023 13F Holders as of 31 Dec 2023
- Security type / class
- Equity / Common Stock, par value $0.001 per share
- Total 13F shares
- 4,715,822
- Total 13F value
- $18,155,320
- Share change
- -408,998
- SEC-reported price per share
- $3.85
- Number of holders
- 23
- Value change
- -$1,046,769
- Number of buys
- 14
- Number of sells
- 11
- Shares outstanding
- 11,691,088
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2023
Institutions
23
Top holders
10
SYBX full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2025
SYNLOGIC, INC. SEC filings
SYNLOGIC, INC. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 87166L209
Recent filing periods:
Ownership snapshot
Top reported holders 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. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
FMR LLC
Disclosed value leader
FMR LLC
Comparable rows
15/15
Latest evidence
30 Sep 2023
13F
Lead comparable stake: 5.5%
Showing 1-6 of 15 holder rows.
Quick read
FMR LLC leads the comparable SEC ownership view at 5.5%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens FMR LLC's linked filing trail.
Comparable ownership
Top 5
FMR LLC
5.5%
ARMISTICE CAPITAL, LLC
5.1%
ORBIMED ADVISORS LLC
3.4%
NEA Management Company, LLC
2.4%
Atlas Venture Associates IX, LLC
1.5%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| FMR LLC |
13F
Company
|
5.5%
|
$1,817,637
646,846 shares
|
— | 30 Sep 2023 |
| ARMISTICE CAPITAL, LLC |
13F
Company
|
5.1%
|
$1,685,646
599,874 shares
|
— | 30 Sep 2023 |
| ORBIMED ADVISORS LLC |
13F
Company
|
3.4%
|
$1,129,614
401,998 shares
|
— | 30 Sep 2023 |
| NEA Management Company, LLC |
13F
Company
|
2.4%
|
$614,605
281,929 shares
|
— | 30 Sep 2023 |
| Atlas Venture Associates IX, LLC |
13F
Company
|
1.5%
|
$496,802
176,798 shares
|
— | 30 Sep 2023 |
| Alyeska Investment Group, L.P. |
13F
Company
|
1.4%
|
$472,176
168,034 shares
|
— | 30 Sep 2023 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2023
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
23
Shares
4,715,822
Rows available
23
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2023 vs Q1 2026 Across Filers
Q1 2026 holders
2
Q4 2023 holders
23
Holder diff
21
| Investor | Q1 2026 Shares | Q4 2023 Shares | Share Diff | Share Chg % | Q1 2026 value | Q4 2023 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend