CIK: 0001133219
Total reported value
$379.8M
Reporting period: 2026-03-31 · Number of holdings: 29
MUHLENKAMP & CO INC disclosed 29 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $379.8M and a quarterly turnover rate of 20.7%.
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Muhlenkamp & Co INC's disclosed holdings carry a Herfindahl concentration index of 0.046 — mathematically equivalent to about 22 equally-sized positions, close to its 29 actual disclosed holdings. Value is spread relatively evenly across the portfolio rather than concentrated in a handful of names.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 0.60), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
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Trim MTZ
-59.5% -$9.2M
Add LYB
+0.7% $7.0M
Trim ICLR
-10.6% -$6.2M
Trim NMIH
-21.7% -$5.3M
Add CE
+0.7% $5.0M
Trim MSFT
-0.2% -$3.8M
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | AEM | Agnico Eagle Mines LTD | Stock-Materials | 7.41% | +0.51% | -8.38% | |
| 2 | EQT | Eqt CORP | Stock-Energy | 6.72% | +0.22% | -11.06% | |
| 3 | NEM | Newmont CORP | Stock-Materials | 6.59% | -1.05% | -18.74% | |
| 4 | MCK | Mckesson CORP | Stock-Healthcare | 6.19% | +0.19% | -0.09% | |
| 5 | RGLD | Royal Gold INC | Stock-Materials | 5.89% | +0.63% | -0.04% | |
| 6 | RUSHA | Rush Enterprises Inc-cl A | Stock-Consumer Disc | 5.78% | +0.33% | -11.61% | |
| 7 | BRK-B | Berkshire Hathaway Inc-cl B | Stock-Other | 4.84% | -0.35% | -0.16% | |
| 8 | SLB | Slb LTD | Stock-Energy | 4.36% | +1.04% | +0.04% | |
| 9 | AAPL | Apple INC | Stock-Tech | 4.18% | -0.41% | -0.45% | |
| 10 | WAB | Wabtec CORP | Stock-Industrials | 4.16% | +0.53% | -0.23% | |
| 11 | LYB | LyondellBasell Industries N.V. | Stock-Materials | 3.97% | +1.81% | +0.72% | |
| 12 | BGC | Bgc Group Inc-a | Stock-Financials | 3.72% | -0.51% | -17.92% | |
| 13 | CE | Celanese CORP | Stock-Materials | 3.65% | +1.27% | +0.67% | |
| 14 | MTZ | Mastec INC | Stock-Industrials | 3.63% | -2.55% | -59.50% | |
| 15 | NMIH | Nmi Holdings INC | Stock-Financials | 3.62% | -1.51% | -21.71% | |
| 16 | MCHP | Microchip Technology INC | Stock-Tech | 3.45% | -0.03% | — | |
| 17 | FRDM | Freedom 100 Emeging Mrkt ETF | ETF-Other | 3.41% | +3.41% | NEW | |
| 18 | MSFT | Microsoft CORP | Stock-Tech | 3.21% | -1.08% | -0.21% | |
| 19 | URI | United Rentals INC | Stock-Industrials | 2.99% | -0.41% | -0.02% | |
| 20 | GLD | Spdr Gold Shares | ETF-Commodities | 2.50% | +0.12% | -0.98% | |
| 21 | TMHC | Taylor Morrison Home CORP | Stock-Consumer Disc | 2.43% | -0.08% | +0.04% | |
| 22 | AMLP | Alerian Mlp ETF | ETF-Other | 2.09% | -0.14% | -14.57% | |
| 23 | EQX | Equinox Gold CORP | Stock-Other | 1.98% | +0.02% | +0.23% | |
| 24 | ICLR | ICON Public Limited Company | Stock-Healthcare | 1.92% | -1.70% | -10.64% | |
| 25 | TRV | Travelers Cos Inc/the | Stock-Financials | 0.51% | -0.01% | — | |
| 26 | GEV | GE Vernova INC | Stock-Industrials | 0.33% | +0.08% | — | |
| 27 | EPD | Enterprise Products Partners | Stock-Energy | 0.25% | +0.04% | — | |
| 28 | RUSHB | Rush Enterprises INC - Cl B | Stock-Other | 0.16% | +0.02% | -0.49% | |
| 29 | XOM | Exxon Mobil CORP | Stock-Energy | 0.07% | +0.07% | NEW |
Performance for Q3 2026
-10.2%
Performance Last 4 Quarters
+28%
Based on 67% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 29 | $379.8M | 21 | |
| 2025-12-31 | 28 | $371.8M | 8 | |
| 2025-09-30 | 31 | $367.9M | 39 | |
| 2025-06-30 | 26 | $320.5M | 0 | |
| 2025-03-31 | 26 | $305.6M | 100 | |
| 2024-12-31 | 30 | $329.5M | 0 | |
| 2024-09-30 | 28 | $326.3M | 0 | |
| 2024-06-30 | 29 | $320.4M | 0 | |
| 2024-03-31 | 29 | $344.3M | 0 | |
| 2023-12-31 | 29 | $305.7M | 0 | |
| 2023-09-30 | 60 | $289.8M | 0 | |
| 2023-06-30 | 31 | $282.2M | 0 | |
| 2022-12-31 | 27 | $236.0M | 0 | |
| 2022-09-30 | 27 | $224.0M | 0 | |
| 2022-06-30 | 28 | $213.6M | 0 | |
| 2022-03-31 | 36 | $287.1M | 0 | |
| 2021-12-31 | 35 | $286.9M | 0 | |
| 2021-09-30 | 32 | $260.4M | 0 | |
| 2021-06-30 | 33 | $272.6M | 8 | |
| 2021-03-31 | 33 | $270.3M | 24 | |
| 2020-12-31 | 37 | $248.5M | 33 | |
| 2020-09-30 | 33 | $193.1M | 21 | |
| 2020-06-30 | 31 | $187.0M | 46 | |
| 2019-12-31 | 37 | $228.8M | 35 | |
| 2019-09-30 | 34 | $205.1M | 31 | |
| 2019-06-30 | 33 | $205.7M | 22 | |
| 2019-03-31 | 32 | $211.1M | 37 | |
| 2018-09-30 | 34 | $233.8M | 28 | |
| 2018-06-30 | 38 | $262.1M | 20 | |
| 2018-03-31 | 38 | $275.6M | 30 | |
| 2017-12-31 | 76 | $338.4M | 18 | |
| 2017-09-30 | 79 | $317.6M | 28 | |
| 2017-06-30 | 83 | $319.3M | 15 | |
| 2017-03-31 | 87 | $326.3M | 27 | |
| 2016-12-31 | 82 | $316.8M | 24 | |
| 2016-09-30 | 59 | $264.8M | 22 | |
| 2016-06-30 | 55 | $256.0M | 25 | |
| 2016-03-31 | 54 | $245.0M | 54 | |
| 2015-12-31 | 61 | $332.9M | 31 | |
| 2015-09-30 | 67 | $340.6M | 34 | |
| 2015-06-30 | 72 | $462.1M | 31 | |
| 2015-03-31 | 67 | $474.8M | 32 | |
| 2014-12-31 | 71 | $498.7M | 35 | |
| 2014-09-30 | 71 | $553.5M | 18 | |
| 2014-06-30 | 61 | $566.8M | 20 | |
| 2014-03-31 | 67 | $568.6M | 25 | |
| 2013-12-31 | 70 | $574.2M | 23 | |
| 2013-09-30 | 57 | $503.1M | 19 | |
| 2013-06-30 | 59 | $480.0M | — |
Muhlenkamp & Co INC's most significant position changes for 2026-03-31: New buy: Freedom 100 Emeging Mrkt ETF (FRDM); Sold out: Chart Industries INC (GTLS); New buy: Exxon Mobil CORP (XOM); Trim: Mastec INC (MTZ) — shares -59.50%; Add: LyondellBasell Industries N.V. (LYB) — shares +0.72%.
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | LYB | LyondellBasell Industries N.V. | +1.8% | +0.72% | Add |
| 2 | CE | Celanese CORP | +1.3% | +0.67% | Add |
| 3 | SLB | Slb LTD | +1% | +0.04% | Add |
| 4 | RGLD | Royal Gold INC | +0.6% | -0.04% | Trim |
| 5 | WAB | Wabtec CORP | +0.5% | -0.23% | Trim |
| 6 | AEM | Agnico Eagle Mines LTD | +0.5% | -8.38% | Trim |
| 7 | RUSHA | Rush Enterprises Inc-cl A | +0.3% | -11.61% | Trim |
| 8 | EQT | Eqt CORP | +0.2% | -11.06% | Trim |
| 9 | MCK | Mckesson CORP | +0.2% | -0.09% | Trim |
| 10 | GLD | Spdr Gold Shares | +0.1% | -0.98% | Trim |
| 11 | GEV | GE Vernova INC | +0.1% | — | Unchanged |
| 12 | EPD | Enterprise Products Partners | 0% | — | Unchanged |
| 13 | EQX | Equinox Gold CORP | 0% | +0.23% | Add |
| 14 | RUSHB | Rush Enterprises INC - Cl B | 0% | -0.49% | Trim |
| 15 | TRV | Travelers Cos Inc/the | 0% | — | Unchanged |
| 16 | MCHP | Microchip Technology INC | 0% | — | Unchanged |
| 17 | TMHC | Taylor Morrison Home CORP | -0.1% | +0.04% | Add |
| 18 | AMLP | Alerian Mlp ETF | -0.1% | -14.57% | Trim |
| 19 | BRK-B | Berkshire Hathaway Inc-cl B | -0.4% | -0.16% | Trim |
| 20 | URI | United Rentals INC | -0.4% | -0.02% | Trim |
| 21 | AAPL | Apple INC | -0.4% | -0.45% | Trim |
| 22 | BGC | Bgc Group Inc-a | -0.5% | -17.92% | Trim |
| 23 | NEM | Newmont CORP | -1.1% | -18.74% | Trim |
| 24 | MSFT | Microsoft CORP | -1.1% | -0.21% | Trim |
| 25 | NMIH | Nmi Holdings INC | -1.5% | -21.71% | Trim |
| 26 | ICLR | ICON Public Limited Company | -1.7% | -10.64% | Trim |
| 27 | MTZ | Mastec INC | -2.6% | -59.50% | Trim |
| 28 | FRDM | Freedom 100 Emeging Mrkt ETF | — | NEW | New buy |
| 29 | GTLS | Chart Industries INC | — | EXIT | Sold out |
| 30 | XOM | Exxon Mobil CORP | — | NEW | New buy |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-06 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-02-04 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-11-07 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-07-24 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-13 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-02-13 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-11-12 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-07-17 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-04-23 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-01-08 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-12-06 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-07-14 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-01-31 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-11-01 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-07-18 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-04-01 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-03-29 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-12-10 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-08-18 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-08-18 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-11 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-11-13 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-20 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-02-20 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2019-11-27 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-08-28 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-05-23 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-11-13 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-08-13 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-05-11 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-02-14 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2017-11-13 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2017-08-11 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2017-05-17 | Amendment | View on EDGAR |
| 2017-03-31 | 2017-05-11 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-02-09 | 13F-HR | View on EDGAR |
| 2016-09-30 | 2016-11-14 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2016-08-09 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2016-05-12 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-02-10 | 13F-HR | View on EDGAR |
| 2015-09-30 | 2015-11-09 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-08-04 | 13F-HR | View on EDGAR |
| 2015-03-31 | 2015-05-14 | 13F-HR | View on EDGAR |
| 2014-12-31 | 2015-02-13 | 13F-HR | View on EDGAR |
| 2014-09-30 | 2014-11-14 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-08-14 | 13F-HR | View on EDGAR |
| 2014-03-31 | 2014-05-14 | 13F-HR | View on EDGAR |
| 2013-12-31 | 2014-02-14 | 13F-HR | View on EDGAR |
| 2013-09-30 | 2013-11-12 | 13F-HR | View on EDGAR |
| 2013-06-30 | 2013-08-19 | 13F-HR | View on EDGAR |
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