SYNLOGIC, INC.
SYNLOGIC, INC. is a Public Limited Company registered in United States under 001295076, and its current status with Massachusetts Secretary of the Commonwealth is active. The company was incorporated on 16 October 2017 and lists its registered address as United States. 5 shareholders are on record for SYNLOGIC, INC., and since every one of them is a company rather than an individual, this particular filing does not on its own establish an ultimate beneficial owner (UBO) — identifying one would mean tracing the ownership of each shareholding company in turn. This profile is sourced directly from Massachusetts Secretary of the Commonwealth and was last updated on 4 October 2026.
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Shareholders
5
Five shareholders are currently on record for SYNLOGIC, INC., reflecting the stock ledger maintained under state corporate law (e.g. §219 of the Delaware General Corporation Law) rather than a public filing.
The largest of these is FMR, LLC, holding 7.1% — the largest recorded stake — followed by Orbimed Advisors LLC. at 4.3%; the remaining 3 shareholders shown hold smaller stakes.
The register reports 21 shareholders in total, though only the top 5 by holding are shown in this view.
Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
| Shareholder | Type | Holding | Source Document |
|---|---|---|---|
| FMR, LLC | 7.1% | Massachusetts Secretary of the Commonwealth | |
| Orbimed Advisors LLC. | 4.3% | Massachusetts Secretary of the Commonwealth | |
| NEA Management Company, LLC | 3% | Massachusetts Secretary of the Commonwealth | |
| Vanguard Group Inc | 2.9% | Massachusetts Secretary of the Commonwealth | |
| Atlas Venture Associates IX, LLC | 1.9% | Massachusetts Secretary of the Commonwealth |
Officers
5
The Principal Executive Officer & Principal Financial Officer of SYNLOGIC, INC. currently on record is Mary Dooley; five officers are currently on record for SYNLOGIC, INC., filed with Massachusetts Secretary of the Commonwealth.
The register reports 18 officers in total, including past appointments, though only the 5 most relevant records are shown here.
Management authority at SYNLOGIC, INC. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
The source filing doesn't specify representation authority — whether officers can act individually or must sign jointly to bind the company — so that detail isn't available here.
Group Structure
SYNLOGIC, INC. has no recorded parent company — it sits at the top of its own group structure, with 3 subsidiaries recorded beneath it across 1 jurisdiction. Each of these downward relationships is derived rather than filed: resolved by matching entities across the registry network, not stated directly in a single document.
Those 3 subsidiaries span United States jurisdiction, though this list should not be read as complete — subsidiaries only become visible here where shareholder data has actually been filed with a register, so holdings in jurisdictions without that filing simply won't appear.
SYNLOGIC, INC.
United States
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Frequently Asked Questions
Who owns SYNLOGIC, INC.?
Five shareholders are currently on record for SYNLOGIC, INC., reflecting the stock ledger maintained under state corporate law (e.g. §219 of the Delaware General Corporation Law) rather than a public filing. The largest of these is FMR, LLC, holding 7.1% — the largest recorded stake — followed by Orbimed Advisors LLC. at 4.3%; the remaining 3 shareholders shown hold smaller stakes. Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
Who is SYNLOGIC, INC.'s UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for SYNLOGIC, INC. is itself a company rather than a natural person, so no Ultimate Beneficial Owner (UBO) is identified at this level; establishing one would require tracing the ownership of each shareholding company in turn.
How many shareholders does SYNLOGIC, INC. have on record?
5 shareholders are shown on record for SYNLOGIC, INC.. The register reports 21 in total; only the top 5 by holding are shown here.
What is SYNLOGIC, INC.'s company registration number?
SYNLOGIC, INC.'s registration number is 001295076, filed with Massachusetts Secretary of the Commonwealth in United States. Its current status on the register is active.
Is SYNLOGIC, INC. still an active company?
SYNLOGIC, INC.'s status on Massachusetts Secretary of the Commonwealth is listed as active.
When was SYNLOGIC, INC. incorporated?
SYNLOGIC, INC. was incorporated on 16 October 2017, according to Massachusetts Secretary of the Commonwealth.
What is SYNLOGIC, INC.'s registered address?
The registered address on file for SYNLOGIC, INC. is United States.
What legal structure is SYNLOGIC, INC. registered as?
SYNLOGIC, INC. is registered as a Public Limited Company in United States.
Who are the officers/directors of SYNLOGIC, INC.?
The Principal Executive Officer & Principal Financial Officer of SYNLOGIC, INC. currently on record is Mary Dooley; five officers are currently on record for SYNLOGIC, INC., filed with Massachusetts Secretary of the Commonwealth. Management authority at SYNLOGIC, INC. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Does SYNLOGIC, INC. have a parent company or subsidiaries?
SYNLOGIC, INC. has no recorded parent company — it sits at the top of its own group structure, with 3 subsidiaries recorded beneath it across 1 jurisdiction. Those 3 subsidiaries span United States jurisdiction, though this list should not be read as complete — subsidiaries only become visible here where shareholder data has actually been filed with a register, so holdings in jurisdictions without that filing simply won't appear.
Can Zavia monitor changes to SYNLOGIC, INC.'s ownership over time?
This profile reflects a point-in-time snapshot from Massachusetts Secretary of the Commonwealth. Zavia's monitoring API can track changes to SYNLOGIC, INC.'s registered shareholders, officers, and group structure going forward, flagging updates as they're filed rather than requiring a manual recheck.
Can I access SYNLOGIC, INC.'s data through an API?
Yes. Zavia's API connects directly to official government ownership registries across 195 countries and territories, including United States, so records like SYNLOGIC, INC.'s registration, shareholder, UBO, and group-structure data can be queried programmatically instead of viewed one page at a time.
Where does this company information come from, and how current is it?
This record is sourced directly from Massachusetts Secretary of the Commonwealth and was last synced on 4 October 2026.