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Mike Mattern

Tortoise Investment Management, Llc

Assets Managed
$1.211B
Holdings
246
Last Quarter
2026 - Q1
Filed Date
21d ago
Growth Rate
6.38%(2Q avg: 3.9%)
Sustained Growth
5 quarters

Portfolio positions

This chart displays the top 10 holdings in Tortoise Investment Management, Llc's 2026 - Q1 portfolio, based on their 13F SEC filing, out of a total of 246 positions.

Assets under management

The assets under management (AUM) of Tortoise Investment Management, Llc over the past 10 years (40 quarters) show continuous growth in total asset value over the last 5 quarters. As of the latest 13F SEC filing for 2026 - Q1, they manage 1.211B in assets, with a quarterly growth rate of 6.38% and a 2-quarter average growth rate of 3.9%. The portfolio is managed by Mike Mattern, and others.

Portfolio holdings

InvestmentPortfolio %Reported Value
IVV
Ishares Core S&p 500 Etf
Recent Activity
Decreased -1.15%
7.84%
$94.911M
145,300 shares@ $653.21 avg price
STIP
Ishares 0-5 Year Tips Bond E
Recent Activity
Increased 48.32%
7.18%
$86.905M
840,231 shares@ $103.44 avg price
AVUS
Avantis U.s. Equity Etf
Recent Activity
Increased 9.14%
3.61%
$43.614M
392,287 shares@ $111.19 avg price
BTT
Blackrock 2030 Muni Trgt Trm
Recent Activity
Increased 2.94%
2.63%
$31.806M
1.401M shares@ $22.7 avg price
JMTG
Mortgage-backed Securities
Recent Activity
Increased 1491.41%
2.6%
$31.377M
615,239 shares@ $51.0 avg price
JMUB
Jpmorgan Municipal Etf
Recent Activity
Increased 11.51%
2.44%
$29.551M
591,139 shares@ $50.0 avg price
SGOV
Ishares 0-3 Month Treasury B
Recent Activity
Increased 1.07%
2.4%
$29.066M
288,750 shares@ $100.67 avg price
MTBA
Simplify Mbs Etf
Recent Activity
Increased 9.47%
2.11%
$25.484M
515,238 shares@ $49.47 avg price
SCHP
Schwab U.s. Tips Etf
Recent Activity
Increased 3.86%
2.05%
$24.738M
929,663 shares@ $26.61 avg price
VGLT
Vanguard Long-term Treasury
Recent Activity
Decreased 0%
2.01%
$24.282M
438,652 shares@ $55.36 avg price

1-10 of 246