MC
Mainstream Capital Management LLC Investment Portfolio (Q3 2026) — 13F Stock Holdings
Mainstream Capital Management LLCCIK: 0002043084
Diversified strategyMomentum followerSector-focused
Total reported value
$169.9M
Reporting period: 2026-09-30 · Number of holdings: 302
Mainstream Capital Management LLC disclosed 302 holdings in its latest 13F filing for the period ending 2026-09-30, with total reported value of $169.9M and a quarterly turnover rate of 25.5%.
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Personality snowflake
- Concentration
- 12.08
- Portfolio Stability
- 25.52
- Momentum
- 100
- Sector conviction
- 73.38
- Diversification
- 100
- Sizing Uniformity
- 71.45
Mainstream Capital Management LLC's disclosed holdings carry a Herfindahl concentration index of 0.030 — mathematically equivalent to about 33 equally-sized positions, well below its 302 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 2.86), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 56% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govTrim JPST
-16.4% -$3.4M
New buy CRXP
Add MSFT
+31.1% $1.6M
Trim IWF
-33.4% -$1.4M
Trim IWD
-37.5% -$1.3M
Trim GLW
+9.1% -$1.3M
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
Showing top 200 holdings (of 302 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | JPST | Jpmorgan Ultra-short Income | ETF-Other | 9.97% | -2.28% | -16.39% | |
| 2 | AAPL | Apple Inc | Stock-Tech | 6.60% | +0.66% | -1.27% | |
| 3 | GSST | Goldman Sachs Ultra Short Bo | ETF-Commodities | 5.62% | -0.09% | +1.03% | |
| 4 | AMZN | Amazon.com Inc | Stock-Consumer Disc | 4.51% | +0.07% | -0.75% | |
| 5 | NVDA | Nvidia CORP | Stock-Tech | 4.10% | +0.77% | +10.52% | |
| 6 | GOOG | Alphabet Inc-cl C | Stock-Comm Services | 3.91% | -0.39% | -3.52% | |
| 7 | META | Meta Platforms Inc-class A | Stock-Comm Services | 3.23% | +0.68% | +0.69% | |
| 8 | CRWD | Crowdstrike Holdings Inc - A | Stock-Tech | 2.19% | +0.60% | +305.81% | |
| 9 | MSFT | Microsoft CORP | Stock-Tech | 2.14% | +0.93% | +31.07% | |
| 10 | IVV | Ishares Core S&p 500 ETF | ETF-Large Cap & Growth | 1.81% | -0.15% | -7.30% | |
| 11 | PANW | Palo Alto Networks Inc | Stock-Tech | 1.77% | +0.19% | -1.85% | |
| 12 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 1.76% | -0.14% | -1.45% | |
| 13 | IWF | Ishares Russell 1000 Growth | ETF-Other | 1.68% | -0.88% | -33.45% | |
| 14 | JPM | Jpmorgan Chase & Co | Stock-Financials | 1.66% | -0.06% | -2.55% | |
| 15 | BRK-B | Berkshire Hathaway Inc-cl B | Stock-Other | 1.58% | -0.05% | -0.26% | |
| 16 | LLY | Eli Lilly & Co | Stock-Healthcare | 1.55% | -0.08% | +1.24% | |
| 17 | GLW | Corning Inc | Stock-Tech | 1.41% | -0.79% | +9.13% | |
| 18 | AMD | Advanced Micro Devices | Stock-Tech | 1.40% | -0.01% | -3.23% | |
| 19 | SPY | Ss Spdr S&p 500 ETF Trust-us | ETF-Large Cap & Growth | 1.34% | -0.22% | -13.94% | |
| 20 | IWD | Ishares Russell 1000 Value E | ETF-Other | 1.33% | -0.80% | -37.53% | |
| 21 | QUAL | Ishares Msci USA Quality Fac | ETF-Other | 1.33% | +0.24% | +23.53% | |
| 22 | COST | Costco Wholesale CORP | Stock-Consumer Staples | 1.26% | -0.05% | +1.03% | |
| 23 | TSLA | Tesla Inc | Stock-Consumer Disc | 1.24% | -0.28% | -0.63% | |
| 24 | CRXP | Columbia Core Plus Bond ETF | ETF-Other | 1.22% | +1.22% | NEW | |
| 25 | IBKR | Interactive Brokers Gro-cl A | Stock-Financials | 1.15% | — | +3.95% | |
| 26 | EFV | Ishares Msci Eafe Value ETF | ETF-Other | 1.07% | +0.21% | +24.13% | |
| 27 | GLD | Spdr Gold Shares | ETF-Commodities | 1.03% | -0.21% | -17.96% | |
| 28 | IVW | Ishares S&p 500 Growth ETF | ETF-Large Cap & Growth | 1.00% | +0.43% | +73.92% | |
| 29 | TJX | Tjx Companies Inc | Stock-Consumer Disc | 0.98% | -0.15% | +2.24% | |
| 30 | GS | Goldman Sachs Group Inc | Stock-Financials | 0.98% | -0.17% | -2.06% | |
| 31 | NFLX | Netflix Inc | Stock-Comm Services | 0.96% | -0.03% | +1.51% | |
| 32 | GEV | GE Vernova Inc | Stock-Industrials | 0.95% | -0.20% | +5.31% | |
| 33 | TOST | Toast Inc-class A | Stock-Tech | 0.90% | -0.05% | -6.70% | |
| 34 | ETN | Eaton Corporation plc | Stock-Industrials | 0.90% | +0.01% | +2.46% | |
| 35 | IEMG | Ishares Core Msci Emerging | ETF-Emerging Markets | 0.87% | +0.28% | +55.11% | |
| 36 | SCHW | Schwab (charles) CORP | Stock-Financials | 0.85% | -0.04% | -7.49% | |
| 37 | VGT | Vanguard Info Tech ETF | ETF-Tech | 0.85% | -0.31% | -28.71% | |
| 38 | IBM | Intl Business Machines CORP | Stock-Tech | 0.85% | -0.27% | -1.64% | |
| 39 | DYNF | Ishrs US E F R A Etf-usd Inc | ETF-Other | 0.75% | +0.51% | +219.09% | |
| 40 | VOT | Vanguard Mid-cap Growth ETF | ETF-Other | 0.74% | -0.32% | -25.14% | |
| 41 | VOE | Vanguard Mid-cap Value ETF | ETF-Other | 0.73% | -0.34% | -29.87% | |
| 42 | WMT | Walmart Inc | Stock-Consumer Staples | 0.71% | -0.17% | -10.02% | |
| 43 | CAVA | Cava Group Inc | Stock-Consumer Disc | 0.69% | -0.32% | +1.08% | |
| 44 | ORLY | O'reilly Automotive Inc | Stock-Consumer Disc | 0.67% | -0.03% | +5.93% | |
| 45 | V | Visa Inc-class A Shares | Stock-Financials | 0.66% | — | -2.18% | |
| 46 | LZ | Legalzoomcom Inc | Stock-Other | 0.66% | -0.08% | — | |
| 47 | IVE | Ishares S&p 500 Value ETF | ETF-Large Cap & Growth | 0.60% | +0.44% | +290.17% | |
| 48 | AVGO | Broadcom Inc | Stock-Tech | 0.58% | -0.07% | -1.63% | |
| 49 | EFG | Ishares Msci Eafe Growth ETF | ETF-Other | 0.56% | -0.18% | -19.49% | |
| 50 | IYW | Ishares Ustechnology ETF | ETF-Tech | 0.55% | -0.14% | -21.20% |
1–50 of 200
Portfolio Performance
Performance for Q4 2026
+0.6%
Performance Last 4 Quarters
+7.5%
- Stdev
- +11.2%
- Beta
- +0.88
- Alpha
- -2.7%
- Max Drawdown
- -9.1%
- Annualized Perf
- +9.9%
- Batting Avg vs S&P
- +39.1%
- Sortino
- +1.7
- Stutzer
- +0.27
- Treynor
- +0.11
- Sterling
- +0.61
- Calmar
- +1.09
- Information Ratio
- -1.59
- Tracking Error
- +2.8%
- Stdev Down
- +5.9%
- Winning Months %
- +60.9%
- Losing Months %
- +39.1%
- Best 12 Months
- +25.1%
- Worst 12 Months
- +7.5%
- Efficiency Ratio
- +0.35
- Sharpe
- +0.9
- Stdev Sectors
- +11.8%
- Skewness
- +0.34
- Kurtosis
- +0.57
- Upside Potential
- +3.37
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
Holding changes this quarter
Mainstream Capital Management LLC's most significant position changes for 2026-09-30: New buy: Columbia Core Plus Bond ETF (CRXP); Sold out: Uber Technologies Inc (UBER); New buy: Ishares S&p 100 ETF (OEF); Sold out: Home Depot Inc (HD); New buy: Reckoner Yld Enh Aaa Clo ETF (RAAA).
Showing top 200 changes by size (of 305 total)
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | CRXP | Columbia Core Plus Bond ETF | +1.2% | NEW | New buy |
| 2 | MSFT | Microsoft CORP | +0.9% | +31.07% | Add |
| 3 | NVDA | Nvidia CORP | +0.8% | +10.52% | Add |
| 4 | META | Meta Platforms Inc-class A | +0.7% | +0.69% | Add |
| 5 | AAPL | Apple Inc | +0.7% | -1.27% | Trim |
| 6 | CRWD | Crowdstrike Holdings Inc - A | +0.6% | +305.81% | Add |
| 7 | DYNF | Ishrs US E F R A Etf-usd Inc | +0.5% | +219.09% | Add |
| 8 | IVE | Ishares S&p 500 Value ETF | +0.4% | +290.17% | Add |
| 9 | IVW | Ishares S&p 500 Growth ETF | +0.4% | +73.92% | Add |
| 10 | OEF | Ishares S&p 100 ETF | +0.4% | NEW | New buy |
| 11 | IEMG | Ishares Core Msci Emerging | +0.3% | +55.11% | Add |
| 12 | RAAA | Reckoner Yld Enh Aaa Clo ETF | +0.3% | NEW | New buy |
| 13 | QUAL | Ishares Msci USA Quality Fac | +0.2% | +23.53% | Add |
| 14 | THRO | Ishares U.s. Thematic Rotati | +0.2% | NEW | New buy |
| 15 | BAI | Ishrs Ai In And Tech Act ETF | +0.2% | NEW | New buy |
| 16 | EFV | Ishares Msci Eafe Value ETF | +0.2% | +24.13% | Add |
| 17 | EBND | State Street Spdr Bloomberg | +0.2% | NEW | New buy |
| 18 | PANW | Palo Alto Networks Inc | +0.2% | -1.85% | Trim |
| 19 | MTUM | Ishares Msci USA Momentum Fa | +0.2% | NEW | New buy |
| 20 | PLTR | Palantir Technologies Inc-a | +0.2% | +50.21% | Add |
| 21 | ✓ | +0.1% | NEW | New buy | |
| 22 | GBTC | Grayscale Bitcoin Trust ETF | +0.1% | NEW | New buy |
| 23 | ITA | Ishares U.s. Aerospace & Def | +0.1% | NEW | New buy |
| 24 | IXN | Ishares Global Tech ETF | +0.1% | NEW | New buy |
| 25 | XLY | Ss Consumer Disc Select Sect | +0.1% | NEW | New buy |
| 26 | DIS | Walt Disney Co/the | +0.1% | NEW | New buy |
| 27 | ARKK | Ark Innovation ETF | +0.1% | NEW | New buy |
| 28 | CEG | Constellation Energy | +0.1% | +17.60% | Add |
| 29 | VOO | Vanguard S&p 500 ETF | +0.1% | NEW | New buy |
| 30 | AMZN | Amazon.com Inc | +0.1% | -0.75% | Trim |
| 31 | JNJ | Johnson & Johnson | +0.1% | NEW | New buy |
| 32 | RJMI | Rj Eagle Municipal Inc ETF | +0.1% | NEW | New buy |
| 33 | XLE | Ss Energy Select Sector | +0.1% | NEW | New buy |
| 34 | VEA | Vanguard Ftse Developed ETF | +0.1% | NEW | New buy |
| 35 | BE | Bloom Energy Corp- A | +0.1% | NEW | New buy |
| 36 | IYE | Ishares U.s. Energy ETF | +0.1% | NEW | New buy |
| 37 | CPAY | Corpay Inc | +0.1% | NEW | New buy |
| 38 | VIG | Vanguard Dividend Apprec ETF | +0.1% | NEW | New buy |
| 39 | XLF | Ss Financial Select Sector | +0.1% | NEW | New buy |
| 40 | PINS | Pinterest Inc- Class A | +0.1% | NEW | New buy |
| 41 | IBIT | Ishares Bitcoin Trust ETF | +0.1% | -9.52% | Trim |
| 42 | IEFA | Ishares Core Msci Eafe ETF | +0.1% | NEW | New buy |
| 43 | VWO | Vanguard Ftse Emerging Marke | +0.1% | NEW | New buy |
| 44 | PFE | Pfizer Inc | +0.1% | NEW | New buy |
| 45 | SHAK | Shake Shack Inc - Class A | +0.1% | NEW | New buy |
| 46 | MEAR | Ishrs Short Mat Muni Act ETF | +0.1% | NEW | New buy |
| 47 | CBRE | Cbre Group Inc - A | +0.1% | NEW | New buy |
| 48 | ABBV | Abbvie Inc | +0.1% | NEW | New buy |
| 49 | IJS | Ishares S&p Small-cap 600 Va | +0.1% | NEW | New buy |
| 50 | VNQ | Vanguard Real Estate ETF | 0% | NEW | New buy |
1–50 of 200
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Data Source Notice: AlphaSMO is the web's most authoritative 13F / Inside Trader database. Institutional holdings and insider trades presented here are precisely computed to deliver accurate portfolio reporting.
Filing History
FAQ
What is Mainstream Capital Management LLC and what type of investor is it?
Mainstream Capital Management LLC is an investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-09-30), the firm manages a tracked equity portfolio valued at approximately $169.9M, spread across 302 disclosed positions.
What are Mainstream Capital Management LLC's largest equity positions?
Based on the latest 13F filing, Mainstream Capital Management LLC's top holdings by market value are:
1. Jpmorgan Ultra-short Income (JPST) — $16.9M (10.0%)
2. Apple Inc (AAPL) — $11.2M (6.6%)
3. Goldman Sachs Ultra Short Bo (GSST) — $9.6M (5.6%)
4. Amazon.com Inc (AMZN) — $7.7M (4.5%)
5. Nvidia CORP (NVDA) — $7.0M (4.1%)
What changes did Mainstream Capital Management LLC make in its most recent portfolio filing?
In the latest reported quarter, Mainstream Capital Management LLC made 195 notable position adjustments: 116 new positions were initiated, 25 existing holdings were added to, 51 positions were partially reduced, and 3 were completely exited. The largest of these moves: New buy: Columbia Core Plus Bond ETF (CRXP); Sold out: Uber Technologies Inc (UBER); New buy: Ishares S&p 100 ETF (OEF); Sold out: Home Depot Inc (HD); New buy: Reckoner Yld Enh Aaa Clo ETF (RAAA)
What sectors does Mainstream Capital Management LLC focus on?
Mainstream Capital Management LLC is concentrated in the following sectors based on its current disclosed equity portfolio:
• Information Technology: 40.9%
• Communication Services: 17.9%
• Consumer Discretionary: 16.9%
• Financials: 11.0%
• Industrials: 4.5%
• Consumer Staples: 3.6%
Investment Profile
Mainstream Capital Management LLC returned an annualized 9.9% over the trailing 23 months — underperforming the S&P 500 by 2.7 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 0.88 (less volatile than the market) and a 39% quarterly batting average against the index.
Its portfolio is broadly diversified and moderately active, with 40.9% of the portfolio concentrated in Information Technology.
It has added to its CRWD position over the past two quarters (+$2.4M, now $3.7M), while trimming JPST over the same stretch (-$3.9M, still holding $16.9M).
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