TMB

Thornburg Multi Sector B ETF$25.34 0.35%
UnclassifiedUSCUSIP 88521L207· EOD Jun 5, 2026◍ Confluence graph
Tracked 13F Holders
4
+4 QoQ
13F Value (tracked)
$621K
Insider Net · 180d
$0
0↑ 0↓
Recent Filings
0
Smart-money sentimentBearish
BearishBullish
13F funds (latest Q)1 adding · 2 trimming
Insider net (180d)$0

Price & smart-money activity

$25.34 0.35%1Y +0.8%
$24.88$25.15$25.43$25.71$25.99Feb 2025MayAugNovMar 2026Jun32322
Hover for who · click for detailEnd-of-day closing prices52w $25.14 – $25.91
Build

Use TMB data in an agent

The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.

Build

Ask your agent who owns TMB

This stock page is the Follow view. The Build view lets your agent query TMB owners, fund changes, insider filings, and source links through REST or MCP.

Copy-paste
curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://arkolith.com/api/v1/stocks/TMB"
Ask your agent
Use Arkolith to show who owns TMB,
which funds added or reduced it, and which
SEC filings prove each claim.

Top institutional holders

4 tracked 13F filers
#FundPosition valueSharesLast moveAs ofHistory
1CITADEL ADVISORS LLC
$326K
13K
−51%
Reduced · −13K sh
Q1 2026
2WEALTH ENHANCEMENT ADVISORY SERVICES, LLC
$218K
9K
−33%
Reduced · −4K sh
Q1 2026
3Sound Income Strategies, LLC
$70K
3K
New
+3K sh
Q1 2026
4IFP Advisors, Inc
$7K
263
−97%
Reduced · −9K sh
Q1 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.

Fund activity: latest quarter

Opened (NEW)
1
funds
Added
0
funds
Reduced
2
funds
Exited
0
funds

Insider activity (Form 4)

No Form 4 insider transactions on file yet.

Institutional ownership over time

15 funds+14 since Q1 2025
0815Q1 2025Q2 2025Q3 2025Q4 2025Q1 2026
funds holding aggregate valuelatest $91.0M

Funds that own TMB also own

CompanyCo-held byCombined value
ISHARES CORE S&P 500 ETFIVV5 funds$6.1B
NVIDIA CORPNVDA5 funds$3.9B
AMAZON.COM INCAMZN5 funds$2.7B
APPLE INCAAPL5 funds$2.3B
MICROSOFT CORPMSFT5 funds$2.2B
MICRON TECHNOLOGY INCMU5 funds$1.7B
ALPHABET INC-CL AGOOGL5 funds$1.6B
SS SPDR DOW JONES INDUS AVGDIA5 funds$1.6B
ISHARES CORE U.S. AGGREGATEAGG5 funds$1.6B
TAIWAN SEMICONDUCTOR-SP ADRTSM5 funds$1.5B
META PLATFORMS INC-CLASS AMETA5 funds$1.4B
BERKSHIRE HATHAWAY INC-CL BBRK/B5 funds$1.3B

Ranked by how many of TMB's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).

Recent filings

0 shown

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

Browse more

13F holdings + Form 4 insider transactions + 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. Every panel above is one call to the Arkolith API & MCP server.