$MUC

$10.01 +$0.14 (1.42%) Close

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

Ownership

13F as of Q2 2026 · 125.0M shares outstanding

Who owns MUC?

By type of holder

Institutions 26.4% Insiders 0.0% Everyone else 73.6%

Concentration Top 10 holders own 19.4%

Morgan Stanley 5.9% · Karpus Management, Inc. 3.7%

Institutional ownership

26.4%

-1.3 pts vs last qtr

Institutional holders

134

-5 vs last qtr

Net shares bought

−1.6M

by institutions in Q2 2026

New / sold out

13 / 18

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Advisors Asset Management, Inc. +314.2K
MAI Capital Management +182.0K

Biggest sellers in Q2 2026

Rivernorth Capital Management, LLC −1.2M
Karpus Management, Inc. −776.3K

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for BlackRock Muniholdings California Quality Fund Inc in the last 12 months.

Is your stake being diluted?

There are not yet two fiscal years of reported share counts for BlackRock Muniholdings California Quality Fund Inc.

How patient are the owners?

Institutional shares by how long they've been held

5+ years49% 3–5 years32% 1–3 years8% Under 1 year11%

Quarterly turnover

6.8%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting MUC on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
MS Morgan Stanley	7.4M	5.92%	+9.8K (+0.1%)	≤2021	0.0%
Shares held by quarter Peak holding7.4M (Q2'26) Change over 8 quarters+1.7M Share of the company5.920% Morgan Stanley's full portfolio →
KM Karpus Management, Inc.	4.6M	3.68%	−776.3K (−14.4%)	2022	1.5%
Shares held by quarter Peak holding5.4M (Q4'25) Change over 8 quarters+969.4K Share of the company3.680% Karpus Management, Inc.'s full portfolio →

Morgan Stanley

7.4M

% of company

5.92%

Change vs last qtr

+9.8K (+0.1%)

Held since

≤2021

Karpus Management, Inc.

4.6M

% of company

3.68%

Change vs last qtr

−776.3K (−14.4%)

Held since

2022

28 more super investors behind a free account

See every manager holding BlackRock Muniholdings California Quality Fund Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting MUC on Form N-PORT; together they hold 2.8% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
RT Robinson Tax Advantaged Income Fund Investment Managers Series Trust	$12.3M	1.1M	0.90%	5.53%	June 30, 2026
RM RiverNorth Managed Duration Muni Income Fund Inc. RiverNorth Managed Duration Municipal Income Fund Inc.	$7.38M	671.5K	0.54%	2.43%	June 30, 2026

Robinson Tax Advantaged Income Fund

Investment Managers Series Trust

Position value

$12.3M

% of company

0.90%

% of the fund

5.53%

As of

June 30, 2026

RiverNorth Managed Duration Muni Income Fund Inc.

RiverNorth Managed Duration Municipal Income Fund Inc.

Position value

$7.38M

% of company

0.54%

% of the fund

2.43%

As of

June 30, 2026

17 more funds behind a free account

See every fund holding BlackRock Muniholdings California Quality Fund 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
HS Harris Stayce D. Insider	21	0.00%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.000% Harris Stayce D.'s insider activity →

Harris Stayce D.

Insider

% of company

0.00%

Change vs last qtr

—

Held since

—

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