Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in MBIO held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Kestra Advisory Services, LLC | 176K | $128K | +58.5% | 2.323% | 0.00% |
| 2 | GEODE CAPITAL MANAGEMENT, LLC | 93K | $68K | +187.4% | 1.225% | 0.00% |
| 3 | BlackRock, Inc. | 85K | $62K | 0.0% | 1.118% | 0.00% |
| 4 | CITADEL ADVISORS LLC | 53K | $39K | -37.2% | 0.702% | 0.00% |
| 5 | VANGUARD FIDUCIARY TRUST CO | 32K | $23K | β | 0.424% | 0.00% |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 26K | $19K | β | 0.339% | 0.00% |
| 7 | CFO4Life Group, LLC | 20K | $15K | +57.9% | 0.270% | 0.00% |
| 8 | TWO SIGMA INVESTMENTS, LP | 17K | $12K | -58.1% | 0.221% | 0.00% |
| 9 | UBS Group AG | 4K | $3K | +8215.9% | 0.048% | 0.00% |
| 10 | Tower Research Capital LLC (TRC) | 2K | $1K | +102.5% | 0.025% | 0.00% |
| 11 | SBI Securities Co., Ltd. | 509 | $371 | -74.7% | 0.007% | 0.00% |
| 12 | MORGAN STANLEY | 118 | $86 | -22.9% | 0.002% | 0.00% |
| 13 | CULLEN/FROST BANKERS, INC. | 13 | $9 | 0.0% | 0.000% | 0.00% |
| 14 | BNP PARIBAS ARBITRAGE, SA | 6 | $4 | 0.0% | 0.000% | 0.00% |
| 15 | MAI Capital Management | 3 | $3 | 0.0% | 0.000% | 0.00% |
| 16 | NBC SECURITIES, INC. | 3 | $2 | 0.0% | 0.000% | 0.00% |
| 17 | CWM, LLC | 2 | $1 | 0.0% | 0.000% | 0.00% |
| 18 | CITIGROUP INC | 1 | $1 | β | 0.000% | 0.00% |
| 19 | GROUP ONE TRADING, L.P. | 1 | $1 | 0.0% | 0.000% | 0.00% |
| 20 | ADVISOR GROUP HOLDINGS, INC. | 2 | $1 | β | 0.000% | 0.00% |
| 21 | DANSKE BANK A/S | 2 | $1 | 0.0% | 0.000% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in MBIO β a direct measure of their conviction.
Filings activity in MBIO during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new MBIO position in Q1 2026
Institutions that fully closed their MBIO position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 21 | 13% | 6.60% | 1.54 pp | $0M | 19% |
| Q4 2025 | 24 | +14% | 8.14% | +0.53 pp | $0M | +7.0% |
| Q3 2025 | 21 | +24% | 7.61% | +6.34 pp | $0M | +501% |
| Q2 2025 | 17 | +6.3% | 1.27% | 1.27 pp | $0M | 50% |
| Q1 2025 | 16 | 48% | 2.54% | 12.05 pp | $0M | 83% |
| Q4 2024 | 31 | +19% | 14.59% | +10.89 pp | $1M | +295% |
| Q3 2024 | 26 | 13% | 3.70% | 2.48 pp | $0M | 40% |
| Q2 2024 | 30 | β | 6.18% | β | $0M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying MBIO stock.
Based on Q1 2026 13F filings, institutional ownership of Mustang Bio, Inc. stands at 6.6%, held across 21 reporting institutions.
Kestra Advisory Services, LLC is the largest reported institutional holder of MBIO, with approximately 176,042 shares worth $0.00B as of Q1 2026.
Yes β 2 widely-followed marquee investors appear among the top 25 institutional holders of MBIO, including CITADEL ADVISORS LLC, TWO SIGMA INVESTMENTS, LP.
Our composite Smart Money Score for MBIO is 37 out of 100 (Bearish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
4 institutions opened new positions in MBIO during Q1 2026, while 7 fully exited. 5 added to existing positions and 8 trimmed.
MBIO institutional ownership fell by 1.54 percentage points quarter-over-quarter, with a net change of -3 holders.
The top 10 institutions account for 99.9% of all reported 13F value in MBIO, and the top 25 account for 100.0%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Mustang Bio, Inc. (MBIO) Institutional Ownership