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For BLACKROCK MUNIASSETS FUND, INC. (MUA), Sit Investment Associates, Inc. and Sit Fixed Income Advisors II, LLC reported shared voting and dispositive power over 7,135,290 common shares, equal to 10.6% of the class. The advisers state that client accounts own all reported securities; they may be deemed beneficial owners through their shared authority but disclaim beneficial ownership under Rule 13d-4. The issuer had 67,139,761 common shares outstanding as of October 1, 2026, according to its website. Paul Rasmussen, Vice President, signed for both advisers.
Key Figures
Shares with shared voting and dispositive power:7,135,290 sharesReported ownership percentage:10.6%Common shares outstanding:67,139,761 shares
3 metrics
Shares with shared voting and dispositive power7,135,290 sharesReported by both advisers
Reported ownership percentage10.6%Of the issuer's common stock
Common shares outstanding67,139,761 sharesAs of October 1, 2026, according to the issuer's website
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
shared voting powerfinancial
"Shared Voting Power 7,135,290.00"
Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.
shared dispositive powerfinancial
"Shared Dispositive Power 7,135,290.00"
Rule 13d-4regulatory
"Pursuant to Rule 13d-4 of the Securities Exchange Act of 1934"
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
How many MUA shares did Sit Investment Associates report?
Sit Investment Associates, Inc. and Sit Fixed Income Advisors II, LLC reported shared voting and dispositive power over 7,135,290 MUA common shares, equal to 10.6% of the class. The shares are held by client accounts managed by the advisers.
Who owns the MUA shares reported by Sit Investment Associates?
The advisers state that client accounts own all reported shares. They may be deemed beneficial owners through shared voting and investment power, but disclaim beneficial ownership under Rule 13d-4. They also state that, except as may be indicated in a joint filing with a registered investment company managed by either adviser, no single advised account owns more than 5% of the class.
Sit Investment Associates, Inc.
Sit Fixed Income Advisors II, LLC
(b)
Address or principal business office or, if none, residence:
80 South 8th Street, Suite 3300
Minneapolis, MN 55402
(c)
Citizenship:
Sit Investment Associates, Inc. Minnesota
Sit Fixed Income Advisors II, LLC Delaware
(d)
Title of class of securities:
Common Stock
(e)
CUSIP Number(s):
09254J102
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:
See response to item 9 on each cover page
(b)
Percent of class:
See response to item 11 on each cover page
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
See response to item 5 on each cover page
(ii) Shared power to vote or to direct the vote:
See response to item 6 on each cover page
(iii) Sole power to dispose or to direct the disposition of:
See response to item 7 on each cover page
(iv) Shared power to dispose or to direct the disposition of:
See response to item 8 on each cover page.
The ownership percentages reported are based on 67,139,761 shares of common stock outstanding as of 10/1/2026, as reported in the Issuer's website.
Sit Investment Associates, Inc. ("SIA") is an investment adviser registered under section 203 of the Investment Advisers Act of 1940. Sit Fixed Income Advisors II, LLC ("SFI") is an investment adviser registered under section 203 of the Investment Advisers Act of 1940 and a subsidiary of SIA. SIA and SFI provide investment management services to client accounts ("Accounts"). In their roles as investment advisers SIA and SFI possess shared voting and investment power over securities of the Issuer described in this schedule 13G owned by the Accounts and may be deemed to be the beneficial owner of such shares of the Issuer owned by the Accounts. All securities reported in this schedule 13G are owned by the Accounts. Pursuant to Rule 13d-4 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), SIA and SFI disclaim beneficial ownership of such securities.
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.
Except as may be indicated if this is a joint filing with a registered investment company managed by SIA or SFI, not more than 5% of the class of such securities is owned by any one Account subject to the investment advice of SIA or SFI.
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
Not Applicable
Item 8.
Identification and Classification of Members of the Group.
Not Applicable
Item 9.
Notice of Dissolution of Group.
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.
