BlackRock MuniAssets Fund, Inc.
US ˙ NYSE ˙ US09254J1025

SecurityMUA / BlackRock MuniAssets Fund, Inc.
InstitutionUBS Group AG
Latest Disclosed Ownership154,759 shares
Latest Disclosed Value $ 1,641,993
UBS Group AG reports 956.88% increase in ownership of MUA / BlackRock MuniAssets Fund, Inc.

On May 5, 2026 - UBS Group AG filed a 13F-HR form disclosing ownership of 154,759 shares of BlackRock MuniAssets Fund, Inc. (US:MUA) valued at $1,641,993 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 14,643 shares of BlackRock MuniAssets Fund, Inc.. This represents a change in shares of 956.88% during the quarter. The current value of the position is $1,649,731 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-05 2026-03-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 154,759 140,116 956.88 1,642 951.92 0.0002
2026-01-29 2025-12-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 14,643 109 0.75 157 -3.11 0.0000
2025-11-13 2025-09-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 14,534 -13,291 -47.77 161 -44.29 0.0000
2025-08-14 2025-06-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 27,825 -55,362 -66.55 289 -67.89 0.0001
2025-05-13 2025-03-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 83,187 -3,271 -3.78 901 -5.66 0.0002
2025-02-14 2024-12-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 86,458 -46,475 -34.96 954 -42.11 0.0002
2024-11-14 2024-09-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 132,933 -131,544 -49.74 1,648 -46.27 0.0004
2024-08-14 2024-06-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 264,477 866 0.33 3,068 5.03 0.0008
2024-05-13 2024-03-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 263,611 660 0.25 2,921 4.89 0.0007
2024-02-09 2023-12-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 262,951 8,287 3.25 2,785 21.52 0.0008
2023-11-09 2023-09-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 254,664 -1,574 -0.61 2,292 -12.15 0.0008
2023-08-11 2023-06-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 256,238 -36,046 -12.33 2,609 -15.24 0.0009
2023-05-12 2023-03-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 292,284 -9,056 -3.01 3,078 -5.61 0.0011
2023-02-08 2022-12-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 301,340 107,044 55.09 3,260 63.41 0.0012
2022-11-10 2022-09-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 194,296 495 0.26 1,995 -15.47 0.0009
2022-08-10 2022-06-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 193,801 108,014 125.91 2,360 114.94 0.0010
2022-05-16 2022-03-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 85,787 17,252 25.17 1,098 7.86 0.0004
2022-02-14 2021-12-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 68,535 663 0.98 1,018 -1.26 0.0003
2021-11-15 2021-09-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 67,872 -1,364 -1.97 1,031 -11.65 0.0003
2021-08-13 2021-06-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 69,236 -4,405 -5.98 1,167 4.01 0.0004
2021-05-12 2021-03-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 73,641 1,409 1.95 1,122 5.85 0.0004
2021-02-11 2020-12-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 72,232 -131 -0.18 1,060 6.43 0.0004
2020-11-12 2020-09-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 72,363 -4,499 -5.85 996 -6.65 0.0004
2020-07-31 2020-06-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 76,862 3,574 4.88 1,067 9.21 0.0005
2020-05-01 2020-03-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 73,288 8,470 13.07 977 -0.61 0.0005
2020-02-14 2019-12-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 64,818 5,492 9.26 983 7.08 0.0003
2019-11-14 2019-09-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 59,326 2,569 4.53 918 2.00 0.0004
2019-08-14 2019-06-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 56,757 -24,704 -30.33 900 -25.62 0.0003
2019-05-14 2019-03-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 81,461 -115,550 -58.65 1,210 -52.29 0.0005
2019-02-14 2018-12-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 197,011 12,773 6.93 2,536 6.11 0.0012
2018-11-14 2018-09-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 184,238 28,242 18.10 2,390 15.79 0.0009
2018-08-14 2018-06-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 155,996 81,606 109.70 2,064 105.58 0.0009
2018-05-15 2018-03-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 74,390 -8,947 -10.74 1,004 -19.55 0.0004
2018-02-14 2017-12-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 83,337 5,182 6.63 1,248 5.94 0.0005
2017-11-14 2017-09-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 78,155 6,423 8.95 1,178 9.68 0.0005
2017-11-14 2017-06-30 13F/A-1 BLACKROCK MUNIASSETS FD COM 09254J102 71,732 1,328 1.89 1,074 7.72 0.0006
2017-08-14 2017-06-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 71,732 1,328 1,074
2017-11-14 2017-03-31 13F/A-1 BLACKROCK MUNIASSETS FD COM 09254J102 70,404 17,567 33.25 997 40.03 0.0005
2017-05-12 2017-03-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 70,404 17,567 997
2017-02-14 2016-12-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 52,837 -3,828 -6.76 712 -18.25 0.0004
2016-11-14 2016-09-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 56,665 -1,406 -2.42 871 -3.76 0.0005
2016-08-12 2016-06-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 58,071 450 0.78 905 5.60 0.0006
2016-05-12 2016-03-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 57,621 7,151 14.17 857 19.03 0.0006
2016-02-16 2015-12-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 50,470 1,350 2.75 720 8.43 0.0005
2015-11-13 2015-09-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 49,120 -18,040 -26.86 664 -26.87 0.0005
2015-08-14 2015-06-30 13F BLACKROCK MUNIASSETS FD COM 09254J102 67,160 -22,645 -25.22 908 -28.11 0.0006
2015-05-14 2015-03-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 89,805 -51,699 -36.54 1,263 -35.26 0.0009
2015-02-17 2014-12-31 13F BLACKROCK MUNIASSETS FD COM 09254J102 141,504 141,504 1,951 0.0014
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.