$MYI

$10.03 +$0.07 (0.7%) Live

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

Ownership

13F as of Q2 2026 · 122.3M shares outstanding

Who owns MYI?

By type of holder

Institutions 31.8% Insiders 0.0% Everyone else 68.2%

Concentration Top 10 holders own 21.1%

Karpus Management, Inc. 4.5% · Rivernorth Capital Management, LLC 3.9%

Institutional ownership

31.8%

-1.6 pts vs last qtr

Institutional holders

156

+4 vs last qtr

Net shares bought

−1.9M

by institutions in Q2 2026

New / sold out

18 / 14

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

UBS Group AG +637.3K
Morgan Stanley +396.4K

Biggest sellers in Q2 2026

Advisors Asset Management, Inc. SOLD OUT −981.3K
Sit Investment Associates Inc −867.6K

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Blackrock Muniyield Quality Fund III Inc in the last 12 months.

Is your stake being diluted?

There are not yet two fiscal years of reported share counts for Blackrock Muniyield Quality Fund III Inc.

How patient are the owners?

Institutional shares by how long they've been held

5+ years45% 3–5 years37% 1–3 years9% Under 1 year10%

Quarterly turnover

7.4%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting MYI on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
KM Karpus Management, Inc.	5.4M	4.45%	−234.6K (−4.1%)	2022	1.7%
Shares held by quarter Peak holding5.7M (Q1'26) Change over 8 quarters+4.9M Share of the company4.450% Karpus Management, Inc.'s full portfolio →
RC Rivernorth Capital Management, LLC	4.8M	3.89%	−493.4K (−9.4%)	2021	2.5%
Shares held by quarter Peak holding5.3M (Q1'26) Change over 8 quarters+2.8M Share of the company3.890% Rivernorth Capital Management, LLC's full portfolio →

Karpus Management, Inc.

5.4M

% of company

4.45%

Change vs last qtr

−234.6K (−4.1%)

Held since

2022

Rivernorth Capital Management, LLC

4.8M

% of company

3.89%

Change vs last qtr

−493.4K (−9.4%)

Held since

2021

28 more super investors behind a free account

See every manager holding Blackrock Muniyield Quality Fund III Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting MYI on Form N-PORT; together they hold 7.3% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
RT Robinson Tax Advantaged Income Fund Investment Managers Series Trust	$18M	1.6M	1.32%	8.07%	June 30, 2026
RF RiverNorth Flexible Municipal Income Fund II Inc. RiverNorth Flexible Municipal Income Fund II Inc.	$15M	1.3M	1.10%	4.21%	June 30, 2026

Robinson Tax Advantaged Income Fund

Investment Managers Series Trust

Position value

$18M

% of company

1.32%

% of the fund

8.07%

As of

June 30, 2026

RiverNorth Flexible Municipal Income Fund II Inc.

Position value

$15M

% of company

1.10%

% of the fund

4.21%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Blackrock Muniyield Quality Fund III 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
TD Toronto Dominion Investments LLC 5%+ holder 13D · 100.0%	5.9K	0.00%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company0.000% Disclosed stake13D · 100.0% View the 13D/G filing →
TD Toronto Dominion Holdings (u.s.a.), Inc. 5%+ holder 13D · 100.0%	5.9K	0.00%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company0.000% Disclosed stake13D · 100.0% View the 13D/G filing →

Toronto Dominion Investments LLC

5%+ holder13D · 100.0%

5.9K

% of company

0.00%

Change vs last qtr

—

Held since

—

Toronto Dominion Holdings (u.s.a.), Inc.

5%+ holder13D · 100.0%

5.9K

% of company

0.00%

Change vs last qtr

—

Held since

—

5 more holders behind a free account

See every insider and 5%+ holder of Blackrock Muniyield Quality Fund III Inc.

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