Thornburg Multi Sector B ETFTMBETF
13F holders, Q1 2026 (March 31)29holders +7
9new positions
3sold out
1famous investor
$25.51avg. 13F price*
At the end of Q1 2026, 29 institutions reported holding Thornburg Multi Sector B ETF (TMB) in their 13F filings, up 7 from Q4 2025. 9 opened new positions and 3 sold out. The largest holders were WCG Wealth Advisors LLC ($44.3M), Mariner, LLC ($28.3M) and Strid Group, LLC ($14.9M). One famous investor held it Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Thornburg Multi Sector B ETF
- CUSIP
- 88521L207
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 9 | $86.7M |
| Exits | 3 | $582K |
All 13F filers, Q4 2025 → Q1 2026: 3,803,267 shares bought and 73,627 shares sold, net +3,729,640 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 29 holders
| WCG Wealth Advisors LLC | 1.24% | New | 1,738,123 | $44.3M |
| Mariner, LLC | 0.03% | New | 1,107,840 | $28.3M |
| Strid Group, LLC | 1.84% | Add +5.8% | 582,838 | $14.9M |
| Personal Cfo Solutions, LLC | 1.59% | Reduce -0.8% | 444,552 | $11.3M |
| Spartan Wealth Advisory Services LLC | 0.84% | — | 376,343 | $9.6M |
| LPL Financial LLC | 0.00% | New | 341,288 | $8.7M |
| D.B. Root & Company, LLC | 1.07% | Add +4.6% | 175,691 | $4.5M |
| Flynn Zito Capital Management, LLC | 1.36% | New | 166,312 | $4.2M |
| Goldman Sachs Group Inc. | 0.00% | Add +321.9% | 165,956 | $4.2M |
| Cornerstone Wealth Group, LLC | 0.23% | Add +94.6% | 137,692 | $3.5M |
| Integrity Wealth Solutions LLC | 1.08% | Add +21.0% | 107,846 | $2.8M |
| HighTower Advisors, LLC | 0.00% | Add +386.0% | 105,788 | $2.7M |
| Westside Investment Management, Inc. | 0.28% | Add +298.7% | 70,973 | $1.8M |
| Clay Northam Wealth Management, LLC | 0.91% | Add +14.8% | 63,300 | $1.6M |
| Empire Financial Management Company, LLC | 0.32% | Add +1.4% | 56,218 | $1.4M |
| Thrivent Financial for Lutherans | 0.00% | New | 30,040 | $766K |
| Principia Wealth Advisory, LLC | 0.19% | Reduce -0.1% | 13,476 | $344K |
| Jane Street Group, LLC | 0.00% | Reduce -60.9% | 13,156 | $336K |
| Citadel Advisors | 0.00% | Reduce -50.9% | 12,787 | $326K |
| Channel Wealth LLC | 0.06% | New | 10,348 | $264K |
| JPMorgan Chase & Co. | 0.00% | Add +366.8% | 9,117 | $232K |
| Wealth Enhancement Advisory Services, LLC | 0.00% | Reduce -32.9% | 8,533 | $218K |
| Sunbelt Securities, Inc. | 0.01% | Add +0.2% | 6,635 | $169K |
| Spire Wealth Management | 0.00% | Add +8.3% | 3,335 | $85K |
| Sound Income Strategies, LLC | 0.00% | New | 2,757 | $70K |
| Private Trust Co. NA | 0.00% | New | 1,096 | $28K |
| Morgan Stanley | 0.00% | Reduce -45.5% | 462 | $12K |
| IFP Advisors, Inc | 0.00% | Reduce -97.2% | 263 | $7K |
| UBS Group AG | 0.00% | New | 106 | $3K |
"% of holder's portfolio" is TMB's weight in each manager's 13F, not the share of Thornburg Multi Sector B ETF the manager owns.