TMB

Thornburg Multi Sector B ETFETF$24.91 0.12%
UnclassifiedCUSIP 88521L207· EOD Sep 15, 2026

Among active 13F managers last quarter, 3 opened and 5 added, while 2 reduced; the largest holder to move was Strid Group, LLC (+3.1%).

Tracked 13F holders
30
19 in Q2 2026 filings
13F value (tracked)
$206.8M
13F moves · latest Q
8 added
2 reduced

Price & smart-money activity

$24.91 0.12%2Y -0.9%
$24.82$25.12$25.41$25.70$25.99Feb 2025JunSepJan 2026MaySep64376482
Hover for who · click for detailEnd-of-day closing prices52w $24.91 – $25.91

Who owns TMB?

30 tracked 13F filers · ranked by shares held

30 tracked 13F filers disclose a position in TMB as of the latest SEC 13F filings, a combined $206.8M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.

#FundSharesPosition valueLast moveAs ofHistory
1WCG Wealth Advisors LLC1.7M
$44.3M
New
+1.7M sh
Q1 2026
2Private Advisor Group, LLC1.1M
$28.3M
New
+1.1M sh
Q2 2026
3Mariner, LLC1.1M
$28.3M
New
+1.1M sh
Q1 2026
4Onyx Bridge Wealth Group LLC627K
$15.9M
New
+627K sh
Q2 2026
5Strid Group, LLC601K
$15.2M
+3.1%
Added · +18K sh
Q2 2026
6Personal Cfo Solutions, LLC467K
$11.8M
+4.9%
Added · +22K sh
Q2 2026
7GGM Financial LLC419K
$10.6M
New
+419K sh
Q2 2026
8Spartan Wealth Advisory Services LLC399K
$10.1M
+6.0%
Added · +23K sh
Q2 2026
9LPL Financial LLC341K
$8.7M
New
+341K sh
Q1 2026
10D.B. Root & Company, LLC183K
$4.6M
+4.1%
Added · +7K sh
Q2 2026
11Flynn Zito Capital Management, LLC178K
$4.5M
+7.1%
Added · +12K sh
Q2 2026
12Goldman Sachs Group Inc166K
$4.2M
+322%
Added · +127K sh
Q1 2026
13Cannon Financial Strategists, Inc.153K
$3.9M
New
+153K sh
Q2 2026
14Cornerstone Wealth Group, LLC153K
$3.9M
+11%
Added · +15K sh
Q2 2026
15Integrity Wealth Solutions LLC130K
$3.3M
+20%
Added · +22K sh
Q2 2026
16HighTower Advisors, LLC106K
$2.7M
+386%
Added · +84K sh
Q1 2026
17Westside Investment Management, Inc.103K
$2.6M
+45%
Added · +32K sh
Q2 2026
18Empire Financial Management Company, LLC56K
$1.4M
−1.2%
Reduced · −665 sh
Q2 2026
19Insight Wealth Partners, LLC31K
$778K
New
+31K sh
Q2 2026
20Jane Street Group, LLC13K
$336K
−61%
Reduced · −20K sh
Q1 2026
21Principia Wealth Advisory, LLC13K
$333K
−2.6%
Reduced · −346 sh
Q2 2026
22Channel Wealth LLC10K
$262K
~0%
Reduced · −5 sh
Q2 2026
23JPMorgan Chase & Co9K
$232K
+367%
Added · +7K sh
Q1 2026
24Wealth Enhancement Advisory Services, LLC9K
$216K
Held
Q2 2026
25Private Trust Co Na4K
$98K
+253%
Added · +3K sh
Q2 2026

Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.

Is TMB being bought or sold by institutions?

Last quarter, 3 funds opened a new position in TMB and 5 added to an existing one, while 2 reduced. Based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).

Opened
3
funds took a first position
Added
5
added to an existing position
Reduced
2
reduced, still holding
Biggest moves · ranked by size of the change, positions above a floor

Funds that own TMB also own

CompanyCo-held byTheir position there
Apple IncAAPL10 funds$294.8M
Nvidia CorpNVDA10 funds$221.5M
Microsoft CorpMSFT10 funds$151.3M
Eli Lilly & CoLLY10 funds$130.0M
SS SPDR S&P 500 ETF Trust-USSPY10 funds$82.4M
Berkshire Hathaway Inc-CL BBRK/B10 funds$58.4M
JPMorgan Chase & CoJPM10 funds$55.8M
Abbvie IncABBV10 funds$43.2M
Morgan StanleyMS10 funds$11.9M
Amazon.com IncAMZN9 funds$137.8M
Alphabet Inc-CL AGOOGL9 funds$124.4M
Alphabet Inc-CL CGOOG9 funds$115.8M

Ranked by how many of TMB's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in TMB.

Institutional ownership over time

19 tracked filers in Q2 2026 filingsstill filing
01326Q1 2025Q2 2025Q3 2025Q4 2025Q1 2026Q2 2026
tracked filers holding their reported valueQ2 2026 filings so far: $116.5M
Each bar counts tracked filers with a position in that quarter's filings, so the newest bar excludes filers still on an earlier quarter. Arkolith's tracked universe has grown over this window; part of any long-run rise is coverage, not new buyers.

Share classes

Class13F holdersValue held
TXUEINTL EQUITY ETF49 funds$325.1M
TMBthis pagemc30 funds$206.8M
88521L108CORE PLUS BD ETF4 funds$7.3M
88521L405INTL GROWTH ETF3 funds$1.3M
THORPREMIUM INCOME B1 funds$250K

Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.

Recent filings

0 most recent

No filings captured for this ticker in the live stream yet.

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Connected entities for TMB

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Ask your agent what changed in TMB

This ETF page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.

Copy-paste
curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://arkolith.com/api/v1/stocks/TMB/capital-change-brief"
Ask your agent
Use Arkolith's capital_change_brief for TMB.
Tell me what changed, whether insider activity
corroborates it, and cite the SEC evidence.

13F holdings + quarter-over-quarter ownership changes + end-of-day price history + the live filing stream, joined for TMB. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.