RiverNorth Capital Management, LLC reported beneficial ownership of 3,366,158 shares of BLACKROCK MUNIYIELD QUALITY FUND III, INC. Common stock (CUSIP 09254E103), representing 5.06% of the class as disclosed in a Schedule 13G. The filing shows RiverNorth has sole voting and dispositive power over these shares.
Positive
None.
Negative
None.
Insights
Large passive stake disclosed: 3,366,158 shares (5.06%).
RiverNorth reports beneficial ownership of 3,366,158 shares, equal to 5.06% of the common class. The filing lists sole voting and dispositive power for that entire amount, indicating direct control of voting decisions.
As a Schedule 13G, this is a passive ownership disclosure; subsequent filings would show any active intent or change in status.
Filing appears to follow passive-investor Schedule 13G reporting conventions.
The form identifies RiverNorth as a Delaware entity and provides address and CUSIP details. It includes the required ownership breakdown: sole voting/dispositive power of 3,366,158 shares and percentage 5.06%.
Periodic amendments may be required if holdings or status change; the signature is dated 05/15/2026.
Key Figures
Beneficial ownership:3,366,158 sharesPercent of class:5.06%Sole voting power:3,366,158 shares+4 more
7 metrics
Beneficial ownership3,366,158 sharesAmount beneficially owned reported on Schedule 13G
Percent of class5.06%Percent of common stock as reported in Item 4(b)
Sole voting power3,366,158 sharesItem 4(c)(i) sole power to vote or direct the vote
Sole dispositive power3,366,158 sharesItem 4(c)(iii) sole power to dispose or direct disposition
CUSIP09254E103Security identifier for Common stock
Signature date05/15/2026Date signature was executed on the filing
Report reference date03/31/2026Date shown near the header of the filing content
Key Terms
beneficially owned, sole dispositive power, Schedule 13G, CUSIP
Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.
sole dispositive powerregulatory
"(iii) Sole power to dispose or to direct the disposition of: 3,366,158"
Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.
Schedule 13Gregulatory
"form_type: "SCHEDULE 13G" header and Item references"
A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.
CUSIPfinancial
"CUSIP Number(s): 09254E103"
A CUSIP is a nine-character alphanumeric code that uniquely identifies a U.S. or Canadian financial security—such as a stock, bond, or fund share—like a Social Security number for an investment. It matters to investors because brokers, exchanges and record-keepers use the CUSIP to match trades, track ownership, settle transactions and pull accurate records, reducing errors and ensuring money and securities go to the right place.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
BLACKROCK MUNIYIELD QUALITY FUND III, INC.
(Name of Issuer)
Common
(Title of Class of Securities)
09254E103
(CUSIP Number)
03/31/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
09254E103
1
Names of Reporting Persons
RIVERNORTH CAPITAL MANAGEMENT, LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
3,366,158.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
3,366,158.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
3,366,158.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
5.06 %
12
Type of Reporting Person (See Instructions)
IA
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
BLACKROCK MUNIYIELD QUALITY FUND III, INC.
(b)
Address of issuer's principal executive offices:
100 BELLEVUE PARKWAY, WILMINGTON, DE, 19809
Item 2.
(a)
Name of person filing:
RiverNorth Capital Management, LLC
(b)
Address or principal business office or, if none, residence:
360 S. Rosemary Avenue, Ste. 1420
West Palm Beach, Florida 33401
(c)
Citizenship:
Delaware
(d)
Title of class of securities:
Common
(e)
CUSIP Number(s):
09254E103
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
3,366,158
(b)
Percent of class:
5.06%
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
3,366,158
(ii) Shared power to vote or to direct the vote:
0
(iii) Sole power to dispose or to direct the disposition of:
3,366,158
(iv) Shared power to dispose or to direct the disposition of:
0
Item 5.
Ownership of 5 Percent or Less of a Class.
Not Applicable
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
Other persons have the right to receive the proceeds from the sale of the securities reported herein.
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary.
Not applicable.
Item 8.
Identification and Classification of Members of the Group.
If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(K), so indicate under Item 3(k) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group.
Not applicable.
Item 9.
Notice of Dissolution of Group.
Notice of dissolution of a group may be furnished as an exhibit stating the date of the dissolution and that all further filings with respect to transactions in the security reported on will be filed, if required, by members of the group, in their individual capacity. See Item 5.
Not applicable.
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
RIVERNORTH CAPITAL MANAGEMENT, LLC
Signature:
/s/ Marcus Collins
Name/Title:
Marcus Collins, General Counsel and Chief Compliance Officer
What stake does RiverNorth hold in BLACKROCK MUNIYIELD QUALITY FUND III (MYI)?
RiverNorth Capital Management, LLC beneficially owns 3,366,158 shares, representing 5.06% of the common stock. The Schedule 13G lists sole voting and dispositive power for the full amount reported.
When was the Schedule 13G for MYI signed by RiverNorth?
The Schedule 13G was signed on 05/15/2026 by Marcus Collins as General Counsel and Chief Compliance Officer. The filing lists a reporting date of 03/31/2026 near the cover information.
Does the filing indicate RiverNorth is an active acquirer or a passive investor?
The filing is submitted on Schedule 13G, which is commonly used for passive investors. The form itself does not state active acquisition intent; it discloses ownership and voting/dispositive powers for the reported shares.
How much voting control does RiverNorth have over MYI shares?
RiverNorth reports sole voting power of 3,366,158 shares and sole dispositive power of 3,366,158 shares. The filing shows no shared voting or dispositive power for the reported position.
What identifier and contact details are included in the filing for MYI holdings?
The filing lists the security CUSIP 09254E103 and RiverNorth's address at 360 S. Rosemary Avenue, Ste. 1420, West Palm Beach, Florida 33401. Issuer address is shown as 100 Bellevue Parkway, Wilmington, DE 19809.
