$UG

$6.67 +$0.02 (0.3%) Close

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

Ownership

13F as of Q2 2026 · 4.6M shares outstanding

Who owns UG?

By type of holder

Institutions 100.0% Insiders 0.0% Everyone else 0.0%

Concentration Top 10 holders own 1171.8%

BlackRock, Inc. 232.2% · RTW Investments, LP 169.7%

Institutional ownership

100.0%

0 pts vs last qtr

Institutional holders

323

+14 vs last qtr

Net shares bought

+8.4M

by institutions in Q2 2026

New / sold out

60 / 46

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

RTW Investments, LP +4.1M
BlackRock, Inc. +3.4M

Biggest sellers in Q2 2026

Assenagon Asset Management S.A. −2.1M
Citadel Advisors LLC −1.9M

Who is planning to sell?

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

Is your stake being diluted?

There are not yet two fiscal years of reported share counts for United-Guardian Inc.

How patient are the owners?

Institutional shares by how long they've been held

5+ years47% 3–5 years19% 1–3 years18% Under 1 year15%

Quarterly turnover

23.6%

of institutional shares changed hands

Top 10 managers, median time held

4.5 years

Super Investors

Investment managers reporting UG on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	10.7M	232.22%	+3.4M (+45.9%)	≤2021	0.0%
Shares held by quarter Peak holding10.7M (Q2'26) Change over 8 quarters+4.8M Share of the company232.220% BlackRock, Inc.'s full portfolio →
RI RTW Investments, LP	7.8M	169.71%	+4.1M (+113.7%)	2021	2.2%
Shares held by quarter Peak holding7.8M (Q2'26) Change over 8 quarters+5.8M Share of the company169.710% RTW Investments, LP's full portfolio →

BlackRock, Inc.

10.7M

% of company

232.22%

Change vs last qtr

+3.4M (+45.9%)

Held since

≤2021

RTW Investments, LP

7.8M

% of company

169.71%

Change vs last qtr

+4.1M (+113.7%)

Held since

2021

28 more super investors behind a free account

See every manager holding United-Guardian Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting UG on Form N-PORT; together they hold 748.8% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
SS State Street(R) SPDR(R) S&P(R) Biotech ETF SPDR Series Trust	$122M	3.7M	79.81%	1.14%	June 30, 2026
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$100M	3.1M	66.97%	0.00%	June 30, 2026

State Street(R) SPDR(R) S&P(R) Biotech ETF

SPDR Series Trust

Position value

$122M

% of company

79.81%

% of the fund

1.14%

As of

June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$100M

% of company

66.97%

% of the fund

0.00%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding United-Guardian Inc and how much of the fund the position is.

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