Blackrock Muniassets Fund, Inc. (NYSE: MUA) closed at $9.97, -0.1%, on 2026-08-27. Institutional ownership, earnings history and filed financials are on the tabs below.
% of shares outstanding is not shown for MUA: this is a fund line, and we hold no cover-page share count for it at any quarter — a fund's shares outstanding move with creations and redemptions rather than with issuance and buybacks, and it is not the SEC cover-page count this percentage is defined against. The figure is withheld rather than computed against a count that does not exist. Holder share counts are shown as filed.
Crowding percentile lands with its cohort — the cohort is size-matched, so it needs a market cap for MUA in the served universe — that lands with the next screener build.
| # | Holder | Shares | Value | % of shares out | Δ QoQ |
|---|---|---|---|---|---|
| 1 | BANK OF AMERICA CORP /DE/ | 1,435,0531.4M | $15M | — | — |
| 2 | GUGGENHEIM CAPITAL LLC | 1,342,4431.3M | $14M | — | ADD 148% |
| 3 | Hennion & Walsh Asset Management, Inc. | 1,224,9661.2M | $13M | — | ADD 25% |
| 4 | KEYBANK NATIONAL ASSOCIATION/OH | 1,053,0501.1M | $11M | — | — |
| 5 | MORGAN STANLEY | 492,485492,485 | $5M | — | ADD 71% |
| 6 | LPL Financial LLC | 481,866481,866 | $5M | — | ADD 11% |
| 7 | COMMONWEALTH EQUITY SERVICES, LLC | 479,886479,886 | $5M | — | TRIM -5% |
| 8 | Advisors Asset Management, Inc. | 474,893474,893 | $5M | — | ADD 23% |
| 9 | SIT INVESTMENT ASSOCIATES INC | 391,622391,622 | $4M | — | NEW |
| 10 | VAN ECK ASSOCIATES CORP | 337,239337,239 | $4M | — | ADD 48% |
Ranked by each filer’s own reported value, not shares.
| Biggest buyers | Δ shares | Δ value | |
|---|---|---|---|
| GUGGENHEIM CAPITAL LLC | +801,833 | $9M | ADD |
| SIT INVESTMENT ASSOCIATES INC | +391,622 | $4M | OPEN |
| Hennion & Walsh Asset Management, Inc. | +248,004 | $3M | ADD |
| MORGAN STANLEY | +203,848 | $2M | ADD |
| WELLS FARGO & COMPANY/MN | +166,979 | $2M | ADD |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| JANE STREET GROUP, LLC | −34,465 | $365,674 | CLOSE |
| StoneX Group Inc. | −25,411 | $269,611 | CLOSE |
| Virtu Financial LLC | −25,143 | $266,767 | CLOSE |
| COMMONWEALTH EQUITY SERVICES, LLC | −24,606 | $261,070 | TRIM |
| Balyasny Asset Management L.P. | −23,349 | $247,733 | CLOSE |
Prior quarter split-rebased · 13Fs are long, US-listed only.
| Holder | 2024-Q4 | 2025-Q1 | 2025-Q2 | 2025-Q3 | 2025-Q4 | 2026-Q1 | Latest value |
|---|---|---|---|---|---|---|---|
| BANK OF AMERICA CORP /DE/ | 1.2M | 1.2M | 1.3M | 1.5M | 1.4M | 1.4M | $15M |
| GUGGENHEIM CAPITAL LLC | 1.1M | 1.0M | 850K | 718K | 541K | 1.3M | $14M |
| Hennion & Walsh Asset Management, Inc. | — | 165K | 328K | 752K | 977K | 1.2M | $13M |
| KEYBANK NATIONAL ASSOCIATION/OH | 1.0M | 994K | 998K | 1.0M | 1.1M | 1.1M | $11M |
| MORGAN STANLEY | 271K | 315K | 298K | 269K | 289K | 492K | $5M |
| LPL Financial LLC | 244K | 245K | 400K | 441K | 436K | 482K | $5M |
| COMMONWEALTH EQUITY SERVICES, LLC | 261K | 326K | 420K | 481K | 504K | 480K | $5M |
| Advisors Asset Management, Inc. | — | — | 106K | 216K | 385K | 475K | $5M |
| SIT INVESTMENT ASSOCIATES INC | — | — | — | — | — | 392K | $4M |
| VAN ECK ASSOCIATES CORP | 174K | 188K | 236K | 191K | 228K | 337K | $4M |
Green = added, red = trimmed, grey = held; a dash is a quarter with no 13F on file — a gap, not an exit.
Holders only — breaks = no 13F.
Short interest has its own tab now — open SI →
SEC Form 13F · ~10,250 filers, 10y · long-only, US-listed, filed ≤45d after quarter-end.
