MC
Mainstream Capital Management LLC Investment Portfolio (Q2 2026) — 13F Stock Holdings
Mainstream Capital Management LLCCIK: 0002043084
Diversified strategyLong-term holderQuality / disciplined sizing
Total reported value
$166.1M
Reporting period: 2026-06-30 · Number of holdings: 90
Mainstream Capital Management LLC disclosed 90 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $166.1M and a quarterly turnover rate of 0.0%.
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Personality snowflake
- Concentration
- 13.89
- Portfolio Stability
- 0
- Momentum
- 50
- Sector conviction
- 67.03
- Diversification
- 100
- Sizing Uniformity
- 85.34
Mainstream Capital Management LLC's disclosed holdings carry a Herfindahl concentration index of 0.035 — mathematically equivalent to about 29 equally-sized positions, well below its 90 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 1.47), 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 57% 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
-2.5% -$527.7K
New buy IBM
Add AMD
+27.1% $1.7M
Add GLW
+0.8% $1.7M
Add PANW
-0.4% $1.4M
Add CRWD
-0.3% $1.3M
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | JPST | Jpmorgan Ultra-short Income | ETF-Other | 12.25% | -1.75% | -2.45% | |
| 2 | AAPL | Apple Inc | Stock-Tech | 5.94% | -0.11% | -4.06% | |
| 3 | GSST | Goldman Sachs Ultra Short Bo | ETF-Commodities | 5.71% | -0.26% | +6.42% | |
| 4 | AMZN | Amazon.com Inc | Stock-Consumer Disc | 4.44% | +0.09% | -0.59% | |
| 5 | GOOG | Alphabet Inc-cl C | Stock-Comm Services | 4.30% | +0.41% | -0.11% | |
| 6 | NVDA | Nvidia CORP | Stock-Tech | 3.33% | +0.08% | -0.43% | |
| 7 | IWF | Ishares Russell 1000 Growth | ETF-Other | 2.56% | +0.07% | +294.26% | |
| 8 | META | Meta Platforms Inc-class A | Stock-Comm Services | 2.55% | -0.35% | -0.82% | |
| 9 | GLW | Corning Inc | Stock-Tech | 2.20% | +0.91% | +0.76% | |
| 10 | IWD | Ishares Russell 1000 Value E | ETF-Other | 2.13% | — | -1.67% | |
| 11 | IVV | Ishares Core S&p 500 ETF | ETF-Large Cap & Growth | 1.96% | +0.02% | -1.88% | |
| 12 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 1.90% | +0.15% | -2.43% | |
| 13 | JPM | Jpmorgan Chase & Co | Stock-Financials | 1.72% | -0.01% | -0.19% | |
| 14 | BRK-B | Berkshire Hathaway Inc-cl B | Stock-Other | 1.63% | -0.10% | +0.07% | |
| 15 | LLY | Eli Lilly & Co | Stock-Healthcare | 1.63% | +0.22% | -1.83% | |
| 16 | CRWD | Crowdstrike Holdings Inc - A | Stock-Tech | 1.59% | +0.68% | -0.35% | |
| 17 | PANW | Palo Alto Networks Inc | Stock-Tech | 1.58% | +0.75% | -0.36% | |
| 18 | SPY | Ss Spdr S&p 500 ETF Trust-us | ETF-Large Cap & Growth | 1.56% | +0.04% | — | |
| 19 | TSLA | Tesla Inc | Stock-Consumer Disc | 1.52% | +0.03% | -0.08% | |
| 20 | AMD | Advanced Micro Devices | Stock-Tech | 1.41% | +0.98% | +27.09% | |
| 21 | COST | Costco Wholesale CORP | Stock-Consumer Staples | 1.31% | -0.25% | -0.21% | |
| 22 | GLD | Spdr Gold Shares | ETF-Commodities | 1.24% | -0.55% | -9.70% | |
| 23 | MSFT | Microsoft CORP | Stock-Tech | 1.21% | -0.13% | +0.09% | |
| 24 | VGT | Vanguard Info Tech ETF | ETF-Tech | 1.16% | +0.22% | +698.96% | |
| 25 | GS | Goldman Sachs Group Inc | Stock-Financials | 1.15% | +0.07% | -0.37% | |
| 26 | IBKR | Interactive Brokers Gro-cl A | Stock-Financials | 1.15% | +0.17% | +0.50% | |
| 27 | GEV | GE Vernova Inc | Stock-Industrials | 1.15% | +0.33% | +16.14% | |
| 28 | TJX | Tjx Companies Inc | Stock-Consumer Disc | 1.13% | -0.19% | +0.27% | |
| 29 | IBM | Intl Business Machines CORP | Stock-Tech | 1.12% | +1.12% | NEW | |
| 30 | QUAL | Ishares Msci USA Quality Fac | ETF-Other | 1.09% | +0.03% | -0.26% | |
| 31 | VOE | Vanguard Mid-cap Value ETF | ETF-Other | 1.07% | -0.05% | -0.10% | |
| 32 | VOT | Vanguard Mid-cap Growth ETF | ETF-Other | 1.06% | +0.06% | -0.28% | |
| 33 | CAVA | Cava Group Inc | Stock-Consumer Disc | 1.01% | -0.15% | +0.27% | |
| 34 | NFLX | Netflix Inc | Stock-Comm Services | 0.99% | -0.49% | +0.07% | |
| 35 | TOST | Toast Inc-class A | Stock-Tech | 0.95% | -0.07% | -1.06% | |
| 36 | SCHW | Schwab (charles) CORP | Stock-Financials | 0.89% | -0.16% | -3.97% | |
| 37 | ETN | Eaton Corporation plc | Stock-Industrials | 0.89% | +0.07% | +0.85% | |
| 38 | WMT | Walmart Inc | Stock-Consumer Staples | 0.88% | -0.22% | -1.54% | |
| 39 | EFV | Ishares Msci Eafe Value ETF | ETF-Other | 0.85% | -0.07% | -0.10% | |
| 40 | DOV | Dover CORP | Stock-Industrials | 0.77% | -0.02% | +0.96% | |
| 41 | LZ | Legalzoomcom Inc | Stock-Other | 0.74% | -0.12% | -11.11% | |
| 42 | EFG | Ishares Msci Eafe Growth ETF | ETF-Other | 0.74% | — | -0.10% | |
| 43 | ORLY | O'reilly Automotive Inc | Stock-Consumer Disc | 0.70% | -0.08% | -0.59% | |
| 44 | IYW | Ishares Ustechnology ETF | ETF-Tech | 0.69% | +0.14% | -0.46% | |
| 45 | V | Visa Inc-class A Shares | Stock-Financials | 0.66% | -0.02% | -3.63% | |
| 46 | AVGO | Broadcom Inc | Stock-Tech | 0.64% | +0.05% | -0.98% | |
| 47 | AMAT | Applied Materials Inc | Stock-Tech | 0.64% | +0.30% | — | |
| 48 | IEMG | Ishares Core Msci Emerging | ETF-Emerging Markets | 0.59% | +0.04% | -0.05% | |
| 49 | IVW | Ishares S&p 500 Growth ETF | ETF-Large Cap & Growth | 0.57% | +0.05% | -0.07% | |
| 50 | CVX | Chevron CORP | Stock-Energy | 0.51% | -0.20% | — |
1–50 of 90
Portfolio Performance
Performance for Q3 2026
+1.2%
Performance Last 4 Quarters
+15.1%
- Stdev
- +11.6%
- Beta
- +0.88
- Alpha
- -2.1%
- Max Drawdown
- -9.1%
- Annualized Perf
- +11.9%
- Batting Avg vs S&P
- +38.1%
- Sortino
- +1.95
- Stutzer
- +0.31
- Treynor
- +0.14
- Sterling
- +0.74
- Calmar
- +1.31
- Information Ratio
- -1.42
- Tracking Error
- +2.8%
- Stdev Down
- +6.1%
- Winning Months %
- +66.7%
- Losing Months %
- +33.3%
- Best 12 Months
- +25.2%
- Worst 12 Months
- +11.1%
- Efficiency Ratio
- +0.39
- Sharpe
- +1.03
- Stdev Sectors
- +11.2%
- Skewness
- +0.2
- Kurtosis
- +0.33
- Upside Potential
- +3.6
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 2026-06-30: New buy: Intl Business Machines CORP (IBM); Sold out: Honest Co Inc/the (HNST); New buy: Cisco Systems Inc (CSCO); Sold out: Walt Disney Co/the (DIS); New buy: Schwab Fndmntl US Lrg Co ETF (FNDX).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | IBM | Intl Business Machines CORP | +1.1% | NEW | New buy |
| 2 | AMD | Advanced Micro Devices | +1% | +27.09% | Add |
| 3 | GLW | Corning Inc | +0.9% | +0.76% | Add |
| 4 | PANW | Palo Alto Networks Inc | +0.8% | -0.36% | Trim |
| 5 | CRWD | Crowdstrike Holdings Inc - A | +0.7% | -0.35% | Trim |
| 6 | GOOG | Alphabet Inc-cl C | +0.4% | -0.11% | Trim |
| 7 | GEV | GE Vernova Inc | +0.3% | +16.14% | Add |
| 8 | AMAT | Applied Materials Inc | +0.3% | — | Unchanged |
| 9 | LLY | Eli Lilly & Co | +0.2% | -1.83% | Trim |
| 10 | VGT | Vanguard Info Tech ETF | +0.2% | +698.96% | Add |
| 11 | IBKR | Interactive Brokers Gro-cl A | +0.2% | +0.50% | Add |
| 12 | CSCO | Cisco Systems Inc | +0.2% | NEW | New buy |
| 13 | GOOGL | Alphabet Inc-cl A | +0.2% | -2.43% | Trim |
| 14 | IYW | Ishares Ustechnology ETF | +0.1% | -0.46% | Trim |
| 15 | RIOT | Riot Platforms Inc | +0.1% | — | Unchanged |
| 16 | FNDX | Schwab Fndmntl US Lrg Co ETF | +0.1% | NEW | New buy |
| 17 | IBB | Ishares Biotechnology ETF | +0.1% | NEW | New buy |
| 18 | AMZN | Amazon.com Inc | +0.1% | -0.59% | Trim |
| 19 | XLK | Ss Technology Select Sector | +0.1% | — | Unchanged |
| 20 | EWY | Ishares Msci South Korea ETF | +0.1% | — | Unchanged |
| 21 | NVDA | Nvidia CORP | +0.1% | -0.43% | Trim |
| 22 | IWF | Ishares Russell 1000 Growth | +0.1% | +294.26% | Add |
| 23 | GS | Goldman Sachs Group Inc | +0.1% | -0.37% | Trim |
| 24 | ETN | Eaton Corporation plc | +0.1% | +0.85% | Add |
| 25 | VOT | Vanguard Mid-cap Growth ETF | +0.1% | -0.28% | Trim |
| 26 | AVGO | Broadcom Inc | +0.1% | -0.98% | Trim |
| 27 | IVW | Ishares S&p 500 Growth ETF | +0.1% | -0.07% | Trim |
| 28 | SPY | Ss Spdr S&p 500 ETF Trust-us | 0% | — | Unchanged |
| 29 | IEMG | Ishares Core Msci Emerging | 0% | -0.05% | Trim |
| 30 | TSLA | Tesla Inc | 0% | -0.08% | Trim |
| 31 | QUAL | Ishares Msci USA Quality Fac | 0% | -0.26% | Trim |
| 32 | ATI | Ati Inc | 0% | — | Unchanged |
| 33 | QQQ | Invesco Qqq Trust Series 1 | 0% | — | Unchanged |
| 34 | IVV | Ishares Core S&p 500 ETF | 0% | -1.88% | Trim |
| 35 | EMXC | Ishares Msci Emr Mrk Ex Chna | 0% | — | Unchanged |
| 36 | DYNF | Ishrs US E F R A Etf-usd Inc | 0% | +0.33% | Add |
| 37 | XLI | Ss Industrial Select Sector | 0% | -0.80% | Trim |
| 38 | IWD | Ishares Russell 1000 Value E | — | -1.67% | Trim |
| 39 | EFG | Ishares Msci Eafe Growth ETF | — | -0.10% | Trim |
| 40 | IJH | Ishares Core S&p Midcap ETF | — | -2.01% | Trim |
| 41 | AXP | American Express Co | — | — | Unchanged |
| 42 | VHT | Vanguard Health Care ETF | — | — | Unchanged |
| 43 | SBUX | Starbucks CORP | — | -0.06% | Trim |
| 44 | IVE | Ishares S&p 500 Value ETF | — | +0.52% | Add |
| 45 | JPM | Jpmorgan Chase & Co | 0% | -0.19% | Trim |
| 46 | VFH | Vanguard Financials ETF | 0% | — | Unchanged |
| 47 | BA | Boeing Co/the | 0% | +1.09% | Add |
| 48 | IFRA | Ishares US Infrastructure | 0% | -2.02% | Trim |
| 49 | DRI | Darden Restaurants Inc | 0% | — | Unchanged |
| 50 | SCHD | Schwab US Dvd Equity ETF | 0% | — | Unchanged |
1–50 of 92
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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 (2026-06-30), the firm manages a tracked equity portfolio valued at approximately $166.1M, spread across 90 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) — $20.3M (12.3%)
2. Apple Inc (AAPL) — $9.9M (5.9%)
3. Goldman Sachs Ultra Short Bo (GSST) — $9.5M (5.7%)
4. Amazon.com Inc (AMZN) — $7.4M (4.4%)
5. Alphabet Inc-cl C (GOOG) — $7.1M (4.3%)
What changes did Mainstream Capital Management LLC make in its most recent portfolio filing?
In the latest reported quarter, Mainstream Capital Management LLC made 75 notable position adjustments: 4 new positions were initiated, 21 existing holdings were added to, 48 positions were partially reduced, and 2 were completely exited. The largest of these moves: New buy: Intl Business Machines CORP (IBM); Sold out: Honest Co Inc/the (HNST); New buy: Cisco Systems Inc (CSCO); Sold out: Walt Disney Co/the (DIS); New buy: Schwab Fndmntl US Lrg Co ETF (FNDX)
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: 36.9%
• Consumer Discretionary: 19.6%
• Communication Services: 17.2%
• Financials: 11.3%
• Industrials: 6.6%
• Consumer Staples: 3.9%
Investment Profile
Mainstream Capital Management LLC returned an annualized 11.9% over the trailing 21 months — underperforming the S&P 500 by 2.1 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 38% quarterly batting average against the index.
Its portfolio is broadly diversified and long-term-holding, with 36.9% of the portfolio concentrated in Information Technology.
It has added to its GSST position over the past two quarters (+$3.1M, now $9.5M), while trimming JEPI over the same stretch (-$1.0M, still holding $619.8K).
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