$SYBX

$0.56 +$0.00 (0.0%) Close

$SYBX Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 12.2M shares outstanding

Who owns SYBX?

By type of holder

Institutions 0.2% Insiders 0.4% Everyone else 99.5%

Concentration Top 10 holders own 224.5%

Funicular Funds, LP 27.0% · Cable Car Capital, LP 27.0%

Institutional ownership

0.2%

0.0 pts vs last qtr

Institutional holders

-1 vs last qtr

Net shares bought

−20

by institutions in Q2 2026

New / sold out

0 / 1

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

None.

Biggest sellers in Q2 2026

Hilltop National Bank SOLD OUT −20

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Synlogic Inc in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2021–FY2025

+58.9%

+12.28% a year

Each share's claim on the business

−37.1%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $13.1M

over 5 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years0% 3–5 years0% 1–3 years0% Under 1 year100%

Quarterly turnover

0.0%

of institutional shares changed hands

Top 10 managers, median time held

2 quarters

Super Investors

Investment managers reporting SYBX on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
DS DRW Securities, LLC	23.8K	0.19%	Unchanged	Q4 '25	0.0%
Shares held by quarter Peak holding24.4K (Q4'25) Change over 8 quarters+23.8K Share of the company0.190% DRW Securities, LLC's full portfolio →
HN Hilltop National Bank	—	—	SOLD OUT	—	0.0%
Shares held by quarter Peak holding20 (Q3'24) Change over 8 quarters−20 Hilltop National Bank's full portfolio →

DRW Securities, LLC

23.8K

% of company

0.19%

Change vs last qtr

Unchanged

Held since

Q4 '25

Hilltop National Bank

—

% of company

—

Change vs last qtr

SOLD OUT

Held since

—

Institutional Funds

Mutual funds and ETFs reporting SYBX on Form N-PORT; together they hold 2.0% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$153K	136.5K	1.11%	0.00%	December 31, 2025
FE Fidelity Extended Market Index Fund Fidelity Concord Street Trust	$53.2K	36.4K	0.30%	0.00%	November 30, 2025

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$153K

% of company

1.11%

% of the fund

0.00%

As of

December 31, 2025

Fidelity Extended Market Index Fund

Fidelity Concord Street Trust

Position value

$53.2K

% of company

0.30%

% of the fund

0.00%

As of

November 30, 2025

5 more funds behind a free account

See every fund holding Synlogic Inc and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
FF Funicular Funds, LP 5%+ holder 13D · 28.3%	3.3M	27.04%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company27.040% Disclosed stake13D · 28.3% View the 13D/G filing →
CC Cable Car Capital, LP 5%+ holder 13D · 28.3%	3.3M	27.04%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company27.040% Disclosed stake13D · 28.3% View the 13D/G filing →

Funicular Funds, LP

5%+ holder13D · 28.3%

3.3M

% of company

27.04%

Change vs last qtr

—

Held since

—

Cable Car Capital, LP

5%+ holder13D · 28.3%

3.3M

% of company

27.04%

Change vs last qtr

—

Held since

—

10 more holders behind a free account

See every insider and 5%+ holder of Synlogic Inc.

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