Morgan Stanley reports 70.62% increase in ownership of MUA / BlackRock MuniAssets Fund, Inc.

BlackRock MuniAssets Fund, Inc.

US ˙ NYSE ˙ US09254J1025

Security	MUA / BlackRock MuniAssets Fund, Inc.
Institution	Morgan Stanley
Latest Disclosed Ownership	492,485 shares
Latest Disclosed Value	$ 5,225,275

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 492,485 shares of BlackRock MuniAssets Fund, Inc. (US:MUA) valued at $5,225,266 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 288,637 shares of BlackRock MuniAssets Fund, Inc.. This represents a change in shares of 70.62% during the quarter. The current value of the position is $5,264,665 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	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-05-15	2026-03-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	492,485	203,848	70.62	5,225	69.04	0.0003
2026-05-27	2025-12-31	13F/A-1	BLACKROCK MUNIASSETS FD	COM	09254J102	288,637	20,003	7.45	3,091	3.69	0.0002
2026-02-13	2025-12-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	288,637	20,003		3,091		0.0002
2026-05-27	2025-09-30	13F/A-1	BLACKROCK MUNIASSETS FD	COM	09254J102	268,634	-29,412	-9.87	2,982	-3.81	0.0002
2025-11-14	2025-09-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	268,634	-29,412		2,982		0.0002
2025-08-15	2025-06-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	298,046	-17,138	-5.44	3,100	-9.20	0.0002
2025-05-15	2025-03-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	315,184	44,480	16.43	3,413	14.22	0.0002
2025-05-15	2024-12-31	13F/A-1	BLACKROCK MUNIASSETS FD	COM	09254J102	270,704	-2,078	-0.76	2,989	-11.65	0.0002
2025-02-14	2024-12-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	270,704	-2,078		2,989		0.0002
2025-05-14	2024-09-30	13F/A-2	BLACKROCK MUNIASSETS FD	COM	09254J102	272,782	9,829	3.74	3,383	10.89	0.0002
2025-02-14	2024-09-30	13F/A-1	BLACKROCK MUNIASSETS FD	COM	09254J102	272,782	9,829		3,383		0.0002
2024-11-14	2024-09-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	272,782	9,829		3,383		0.0000
2025-05-14	2024-06-30	13F/A-2	BLACKROCK MUNIASSETS FD	COM	09254J102	262,953	-5,717	-2.13	3,050	2.49	0.0002
2024-10-17	2024-06-30	13F/A-1	BLACKROCK MUNIASSETS FD	COM	09254J102	262,953	-5,717		3,050		0.0002
2024-08-14	2024-06-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	262,953	-5,717		3,050		0.0002
2024-10-17	2024-03-31	13F/A-2	BLACKROCK MUNIASSETS FD	COM	09254J102	268,670	22,851	9.30	2,977	14.33	0.0002
2024-08-16	2024-03-31	13F/A-1	BLACKROCK MUNIASSETS FD	COM	09254J102	268,670	22,851		2,977		0.0000
2024-05-15	2024-03-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	268,670	22,851		2,977		0.0002
2024-08-16	2023-12-31	13F/A-1	BLACKROCK MUNIASSETS FD	COM	09254J102	245,819	6,298	2.63	2,603	20.79	0.0002
2024-02-13	2023-12-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	245,819	6,298		2,603		0.0002
2023-11-15	2023-09-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	239,521	12,306	5.42	2,156	-6.83	0.0002
2023-08-14	2023-06-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	227,215	-3,373	-1.46	2,313	-4.74	0.0002
2023-05-15	2023-03-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	230,588	1,023	0.45	2,428	-2.22	0.0003
2023-02-14	2022-12-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	229,565	-28,899	-11.18	2,484	-6.48	0.0003
2022-11-14	2022-09-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	258,464	11,496	4.65	2,655	-11.74	0.0004
2022-10-27	2022-06-30	13F/A-1	BLACKROCK MUNIASSETS FD	COM	09254J102	246,968	41,685	20.31	3,008	14.46	0.0004
2022-08-15	2022-06-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	246,968	41,685		3,008		0.0004
2022-10-27	2022-03-31	13F/A-1	BLACKROCK MUNIASSETS FD	COM	09254J102	205,283	-120	-0.06	2,628	-13.89	0.0004
2022-05-13	2022-03-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	205,283	-120		2,628		0.0004
2022-02-14	2021-12-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	205,403	3,344	1.65	3,052	-0.55	0.0004
2021-11-15	2021-09-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	202,059	13,069	6.92	3,069	-3.67	0.0004
2021-08-23	2021-06-30	13F/A-1	BLACKROCK MUNIASSETS FD	COM	09254J102	188,990	10,198	5.70	3,186	16.92	0.0004
2021-08-16	2021-06-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	188,990	10,198		3,186		0.0001
2021-05-17	2021-03-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	178,792	29,551	19.80	2,725	24.37	0.0004
2021-02-16	2020-12-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	149,241	4,713	3.26	2,191	10.16	0.0003
2020-11-13	2020-09-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	144,528	2,456	1.73	1,989	0.86	0.0004
2020-08-14	2020-06-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	142,072	3,047	2.19	1,972	6.42	0.0004
2020-05-26	2020-03-31	13F/A-1	BLACKROCK MUNIASSETS FD	COM	09254J102	139,025	-96,210	-40.90	1,853	-48.08	0.0005
2020-05-15	2020-03-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	139,025	-96,210		1,853		142.3490
2020-02-14	2019-12-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	235,235	6,805	2.98	3,569	0.93	0.0008
2019-11-14	2019-09-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	228,430	2,192	0.97	3,536	-1.45	0.0009
2019-08-14	2019-06-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	226,238	-141	-0.06	3,588	6.72	0.0010
2019-05-15	2019-03-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	226,379	-484	-0.21	3,362	15.14	0.0010
2019-02-14	2018-12-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	226,863	21,813	10.64	2,920	9.82	0.0009
2019-04-23	2018-09-30	13F/A-2	BLACKROCK MUNIASSETS FD	COM	09254J102	205,050	-5,181	-2.46	2,659	-4.39	0.0007
2018-11-20	2018-09-30	13F/A-1	BLACKROCK MUNIASSETS FD	COM	09254J102	205,050	0		2,659		0.0007
2018-11-14	2018-09-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	205,050	-5,181		2,659
2019-04-23	2018-06-30	13F/A-1	BLACKROCK MUNIASSETS FD	COM	09254J102	210,231	16,015	8.25	2,781	6.15	0.0008
2018-08-14	2018-06-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	210,231	16,015		2,781
2019-04-23	2018-03-31	13F/A-1	BLACKROCK MUNIASSETS FD	COM	09254J102	194,216	18,807	10.72	2,620	-0.23	0.0007
2018-05-14	2018-03-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	194,216	18,807		2,620
2019-04-23	2017-12-31	13F/A-1	BLACKROCK MUNIASSETS FD	COM	09254J102	175,409	11,083	6.74	2,626	5.97	0.0007
2018-02-14	2017-12-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	175,409	11,083		2,626
2017-11-14	2017-09-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	164,326	5,364	3.37	2,478	4.16	0.0007
2017-08-11	2017-06-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	158,962	2,709	1.73	2,379	7.50	0.0007
2017-05-22	2017-03-31	13F/A-1	BLACKROCK MUNIASSETS FD	COM	09254J102	156,253	17,824	12.88	2,213	18.66	0.0007
2017-05-12	2017-03-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	156,253			2,213
2017-02-22	2016-12-31	13F/A-1	BLACKROCK MUNIASSETS FD	COM	09254J102	138,429	-69,834	-33.53	1,865	-41.74	0.0006
2017-02-13	2016-12-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	138,429			1,865
2016-11-10	2016-09-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	208,263	26,823	14.78	3,201	13.27	0.0011
2016-08-12	2016-06-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	181,440	11,166	6.56	2,826	11.66	0.0010
2016-05-12	2016-03-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	170,274	-8,430	-4.72	2,531	-0.75	0.0010
2016-02-09	2015-12-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	178,704	-6,805	-3.67	2,550	1.76	0.0009
2016-02-08	2015-09-30	13F/A-1	BLACKROCK MUNIASSETS FD	COM	09254J102	185,509	8,845	5.01	2,506	4.85	0.0009
2015-11-09	2015-09-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	185,509			2,506
2015-08-12	2015-06-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	176,664	4,803	2.79	2,390	-1.08	0.0008
2015-05-14	2015-03-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	171,861	-7,092	-3.96	2,416	-2.11	0.0009
2015-02-13	2014-12-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	178,953	-12,493	-6.53	2,468	-1.79	0.0009
2014-12-16	2014-09-30	13F/A-1	BLACKROCK MUNIASSETS FD	COM	09254J102	191,446	-47,212	-19.78	2,513	-17.85	0.0010
2014-11-14	2014-09-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	191,446			2,513
2014-08-12	2014-06-30	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	238,658	5,793	2.49	3,059	6.59	0.0052
2014-05-13	2014-03-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	232,865	-30,813	-11.69	2,870	-5.75	0.0012
2014-02-13	2013-12-31	13F	BLACKROCK MUNIASSETS FD	COM	09254J102	263,678	-80,013	-23.28	3,045	-25.60	0.0013
2013-11-13	2013-09-30	13F	BLACKROCK MUNIASSETS FUND I	COM	09254J102	343,691	13,859	4.20	4,093	-1.68	0.0019
2013-08-08	2013-06-30	13F	BLACKROCK MUNIASSETS FUND I	COM	09254J102	329,832	329,832		4,163		0.0021

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.