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BlackRock Muniyield Quality Fund III, Inc.

MYI
Exchange
NYSE
SEC CIK
0000883412

No open-market purchases or sales by BlackRock Muniyield Quality Fund III, Inc. insiders were filed in the last 90 days; 156 institutions reported holding it in 13F filings for Q2 2026, worth $431.8M in total; no superinvestor holds it.

13F holders, Q3 2025

Institutional positions in BlackRock Muniyield Quality Fund III, Inc. as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
94
−2 vs. Q2 2025
Shares held
18.0M
−443.3K (−2.4%) vs. Q2 2025
Total value
$198.9M
+$5.78M (+3.0%) vs. Q2 2025
New holders
10
31 more added
Sold out
12
24 more reduced

1 institution that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q2 2025: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting MYI on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ3 2025: 94 institutions
Q1 2021: 105 institutionsQ2 2021: 104 institutionsQ3 2021: 100 institutionsQ4 2021: 104 institutionsQ1 2022: 106 institutionsQ2 2022: 101 institutionsQ3 2022: 101 institutionsQ4 2022: 107 institutionsQ1 2023: 98 institutionsQ2 2023: 98 institutionsQ3 2023: 102 institutionsQ4 2023: 105 institutionsQ1 2024: 104 institutionsQ2 2024: 108 institutionsQ3 2024: 100 institutionsQ4 2024: 102 institutionsQ1 2025: 100 institutionsQ2 2025: 97 institutionsQ3 2025: 94 institutionsQ4 2025: 109 institutionsQ1 2026: 152 institutionsQ2 2026: 156 institutions
Value heldQ3 2025: $198.9M
Q1 2021: $333.4MQ2 2021: $335.3MQ3 2021: $296.1MQ4 2021: $318.4MQ1 2022: $267.0MQ2 2022: $254.5MQ3 2022: $221.3MQ4 2022: $273.4MQ1 2023: $274.8MQ2 2023: $258.8MQ3 2023: $232.9MQ4 2023: $273.8MQ1 2024: $246.3MQ2 2024: $223.1MQ3 2024: $221.6MQ4 2024: $210.2MQ1 2025: $206.5MQ2 2025: $193.5MQ3 2025: $198.9MQ4 2025: $209.3MQ1 2026: $429.7MQ2 2026: $431.8M
Institutions holding MYI and their total value by quarter
QuarterHoldersValue
Q2 2026156$431.8M
Q1 2026152$429.7M
Q4 2025109$209.3M
Q3 202594$198.9M
Q2 202597$193.5M
Q1 2025100$206.5M
Q4 2024102$210.2M
Q3 2024100$221.6M
Q2 2024108$223.1M
Q1 2024104$246.3M
Q4 2023105$273.8M
Q3 2023102$232.9M
Q2 202398$258.8M
Q1 202398$274.8M
Q4 2022107$273.4M
Q3 2022101$221.3M
Q2 2022101$254.5M
Q1 2022106$267.0M
Q4 2021104$318.4M
Q3 2021100$296.1M
Q2 2021104$335.3M
Q1 2021105$333.4M

Institutions, Q3 2025

Shares, value and share of portfolio for each institution holding BlackRock Muniyield Quality Fund III, Inc.; share changes are against Q2 2025.

Institutions holding MYI in Q3 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Morgan Stanley2,903,353$32.2M0.00%+179,523+6.6%Added
Rivernorth Capital Management, LLC1,970,176$21.8M1.24%−19,125−1.0%Reduced
Hennion & Walsh Asset Management, Inc.1,541,283$17.1M0.62%+287,568+22.9%Added
Guggenheim Capital LLC1,345,582$14.9M0.11%+64,888+5.1%Added
Stifel Financial Corp1,053,871$11.7M0.01%−56,076−5.1%Reduced
Raymond James Financial Inc953,457$10.6M0.00%+45,120+5.0%Added
Bank of America Corp654,661$7.25M0.00%−59,875−8.4%Reduced
UBS Group AG618,760$6.86M0.00%−120,874−16.3%Reduced
Allianz Asset Management GmbH490,934$5.44M0.01%00.0%Unchanged
Van Eck Associates Corp437,443$4.85M0.00%+23,690+5.7%Added
Wells Fargo & Company414,737$4.60M0.00%+102,118+32.7%Added
Advisors Asset Management, Inc.410,173$4.54M0.08%+20,152+5.2%Added
City of London Investment Management Co Ltd391,043$4.33M0.32%+42,199+12.1%Added
Robinson Capital Management, LLC316,793$3.51M2.52%−187,853−37.2%Reduced
Rareview Capital LLC287,907$3.02M1.84%+287,907New
Sit Investment Associates Inc262,466$2.91M0.06%−39,874−13.2%Reduced
Rockefeller Capital Management L.P.247,238$2.74M0.01%+11,046+4.7%Added
Capital Investment Advisors, LLC245,534$2.72M0.04%−13,143−5.1%Reduced
Melfa Wealth Management, LLC240,841$2.67M1.56%+140.0%Added
Royal Bank of Canada224,467$2.49M0.00%−23,761−9.6%Reduced
Kim, LLC204,185$2.26M0.25%+1,061+0.5%Added
GWM Advisors LLC202,285$2.24M0.01%−3,763−1.8%Reduced
LPL Financial LLC197,060$2.18M0.00%+36,637+22.8%Added
Commonwealth Equity Services, LLC185,093$2.05M0.00%+27,397+17.4%Added
Coastal Bridge Advisors, LLC172,602$1.91M0.15%+56,318+48.4%Added
Invesco Ltd.167,529$1.86M0.00%+16,716+11.1%Added
Cohen & Steers, Inc.166,757$1.85M0.00%00.0%Unchanged
Allspring Global Investments Holdings, LLC135,092$1.50M0.00%+31,488+30.4%Added
Eastern Bank131,231$1.45M0.03%00.0%Unchanged
HighTower Advisors, LLC113,330$1.26M0.00%−9,095−7.4%Reduced
Horizon Kinetics Asset Management LLC102,099$1.13M0.01%−2,200−2.1%Reduced
The PNC Financial Services Group, Inc.79,326$878.9K0.00%00.0%Unchanged
Scarborough Advisors, LLC63,000$698.0K0.12%00.0%Unchanged
Karpus Management, Inc.56,400$624.9K0.02%−271,400−82.8%Reduced
Advisory Services Network, LLC51,340$568.8K0.01%00.0%Unchanged
Westchester Capital Management, LLC51,189$567.2K0.03%00.0%Unchanged
Ackerman Capital Advisors, LLC41,572$460.6K0.10%−12,330−22.9%Reduced
Crescent Grove Advisors, LLC39,865$443.9K0.04%−23,194−36.8%Reduced
First Western Trust Bank39,221$434.6K0.02%00.0%Unchanged
Concurrent Investment Advisors, LLC36,830$408.1K0.01%+800+2.2%Added
Ameriprise Financial Inc35,612$394.6K0.00%−25,298−41.5%Reduced
Ashton Thomas Private Wealth, LLC32,839$364.9K0.01%+13,500+69.8%Added
Moors & Cabot, Inc.28,090$311.2K0.01%+400+1.4%Added
Bard Financial Services, Inc.27,500$304.7K0.03%−12,500−31.3%Reduced
Cresta Advisors, Ltd.27,000$299.2K0.13%00.0%Unchanged
Janney Montgomery Scott LLC25,900$287.0K0.00%+16+0.1%Added
Hollencrest Capital Management22,896$253.7K0.01%00.0%Unchanged
US Bancorp22,538$249.7K0.00%00.0%Unchanged
Mercer Global Advisors Inc21,886$242.5K0.00%+500+2.3%Added
Jane Street Group, LLC20,911$231.7K0.00%−14,694−41.3%Reduced
Daner Wealth Management, LLC20,417$224.6K0.15%+20,417New
Advisor Group Holdings, Inc.20,573$222.0K0.00%−175−0.8%Reduced
Plancorp, LLC20,000$221.6K0.01%+20,000New
Private Advisor Group, LLC19,157$212.3K0.00%+4,057+26.9%Added
Pathway Financial Advisers, LLC18,698$207.1K0.06%+201+1.1%Added
Rothschild Investment LLC18,500$205.0K0.01%−4,000−17.8%Reduced
TrueMark Investments, LLC17,503$193.9K0.03%+17,503New
Camelot Portfolios, LLC17,001$188.4K0.11%−1,560−8.4%Reduced
Pathstone Holdings, LLC16,634$184.3K0.00%−627,234−97.4%Reduced
Mariner, LLC16,259$180.1K0.00%+2,001+14.0%Added
Equitable Holdings, Inc.15,899$176.2K0.00%00.0%Unchanged
Kestra Advisory Services, LLC15,652$173.4K0.00%+1,873+13.6%Added
First Trust Advisors LP15,002$166.2K0.00%+2,230+17.5%Added
Disciplined Investors, L.L.C.14,500$160.7K0.11%00.0%Unchanged
Cetera Investment Advisers14,308$158.5K0.00%+14,308New
Steward Partners Investment Advisory, LLC14,012$155.3K0.00%−1,752−11.1%Reduced
CX Institutional14,000$155.0K0.00%00.0%Unchanged
HRT Financial LP13,684$151.0K0.00%+2,691+24.5%Added
SFMG, LLC13,526$149.9K0.01%00.0%Unchanged
River Street Advisors LLC13,314$147.5K0.06%00.0%Unchanged
Toronto Dominion Bank13,232$146.6K0.00%00.0%Unchanged
CI Private Wealth, LLC12,966$143.7K0.00%+12,966New
Alesco Advisors LLC11,800$130.7K0.00%00.0%Unchanged
Creative Planning11,239$124.5K0.00%+1,000+9.8%Added
Commerce Bank10,000$110.8K0.00%00.0%Unchanged
Future Financial Wealth Managment LLC10,000$110.8K0.07%00.0%Unchanged
Sonora Investment Management Group, LLC10,000$110.8K0.01%00.0%Unchanged
Chung Wu Investment Group, LLC10,000$110.8K0.09%+4,000+66.7%Added
Prestige Wealth Management Group LLC7,472$83.2K0.02%+7,472New
Gould Capital, LLC6,350$70.4K0.04%00.0%Unchanged
Harbour Investments, Inc.5,200$57.6K0.00%00.0%Unchanged
Wealthspire Advisors, LLC5,000$55.4K0.00%+5,000New
Northwestern Mutual Wealth Management Co3,928$43.5K0.00%−39,860−91.0%Reduced
Anchor Investment Management, LLC3,275$36.3K0.00%00.0%Unchanged
Allworth Financial LP2,008$22.2K0.00%00.0%Unchanged
AdvisorNet Financial, Inc1,537$17.0K0.00%00.0%Unchanged
FNY Investment Advisers, LLC1,200$13.0K0.00%00.0%Unchanged
ORG Wealth Partners, LLC981$10.9K0.00%00.0%Unchanged
Highline Wealth Partners LLC500$5.54K0.00%+500New
Capital Analysts, LLC434$5.00K0.00%+7+1.6%Added
Mather Group, LLC.212$2.35K0.00%+212New
WPG Advisers, LLC203$2.25K0.00%+6+3.0%Added
GPS Wealth Strategies Group, LLC97$1.07K0.00%00.0%Unchanged
Comerica Bank29$3250.00%−2,700−98.9%Reduced
Mackay Shields LLC0$00.00%−88,233−100.0%Sold out
Readystate Asset Management LP0$00.00%−30,964−100.0%Sold out
Elequin Capital LP0$00.00%−26,335−100.0%Sold out
Summit Trail Advisors, LLC0$00.00%−23,664−100.0%Sold out
Vivaldi Capital Management, LLC0$00.00%−13,880−100.0%Sold out
Landscape Capital Management, L.L.C.0$00.00%−12,841−100.0%Sold out