CIK: 0002043084
Total reported value
$149.1M
Reporting period: 2026-03-31 · Number of holdings: 88
Mainstream Capital Management LLC disclosed 88 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $149.1M and a quarterly turnover rate of 15.3%.
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Mainstream Capital Management LLC's disclosed holdings carry a Herfindahl concentration index of 0.039 — mathematically equivalent to about 26 equally-sized positions, well below its 88 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 1.57), 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 46% 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.
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Add GSST
+39.6% $2.5M
Trim LZ
0.0% -$958.5K
Add GLW
+0.2% $688.6K
Trim AMZN
-1.5% -$810.5K
Add JPST
+0.6% $134.0K
Trim META
-0.2% -$675.3K
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | JPST | Jpmorgan Ultra-short Income | ETF-Other | 14.00% | +0.43% | +0.61% | |
| 2 | AAPL | Apple INC | Stock-Tech | 6.05% | -0.31% | -0.52% | |
| 3 | GSST | Goldman Sachs Ultra Short Bo | ETF-Commodities | 5.97% | +1.80% | +39.56% | |
| 4 | AMZN | Amazon.com INC | Stock-Consumer Disc | 4.35% | -0.43% | -1.48% | |
| 5 | GOOG | Alphabet Inc-cl C | Stock-Comm Services | 3.89% | -0.25% | +0.37% | |
| 6 | NVDA | Nvidia CORP | Stock-Tech | 3.25% | -0.13% | +0.31% | |
| 7 | META | Meta Platforms Inc-class A | Stock-Comm Services | 2.90% | -0.38% | -0.20% | |
| 8 | IWF | Ishares Russell 1000 Growth | ETF-Other | 2.49% | -0.24% | -1.36% | |
| 9 | IWD | Ishares Russell 1000 Value E | ETF-Other | 2.13% | — | -1.03% | |
| 10 | IVV | Ishares Core S&p 500 ETF | ETF-Large Cap & Growth | 1.94% | -0.05% | -0.32% | |
| 11 | GLD | Spdr Gold Shares | ETF-Commodities | 1.79% | +0.19% | +0.19% | |
| 12 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 1.75% | -0.16% | -2.69% | |
| 13 | BRK-B | Berkshire Hathaway Inc-cl B | Stock-Other | 1.73% | -0.04% | +0.11% | |
| 14 | JPM | Jpmorgan Chase & Co | Stock-Financials | 1.73% | -0.09% | +1.32% | |
| 15 | COST | Costco Wholesale CORP | Stock-Consumer Staples | 1.56% | +0.25% | +0.04% | |
| 16 | SPY | Ss Spdr S&p 500 ETF Trust-us | ETF-Large Cap & Growth | 1.52% | -0.03% | — | |
| 17 | TSLA | Tesla INC | Stock-Consumer Disc | 1.49% | -0.24% | +1.73% | |
| 18 | NFLX | Netflix INC | Stock-Comm Services | 1.48% | — | +0.07% | |
| 19 | LLY | Eli Lilly & Co | Stock-Healthcare | 1.41% | -0.20% | +0.26% | |
| 20 | MSFT | Microsoft CORP | Stock-Tech | 1.34% | -0.34% | +1.58% | |
| 21 | TJX | Tjx Companies INC | Stock-Consumer Disc | 1.32% | +0.10% | +1.12% | |
| 22 | GLW | Corning INC | Stock-Tech | 1.29% | +0.48% | +0.17% | |
| 23 | CAVA | Cava Group INC | Stock-Consumer Disc | 1.16% | +0.36% | +2.57% | |
| 24 | VOE | Vanguard Mid-cap Value ETF | ETF-Other | 1.12% | — | -0.86% | |
| 25 | WMT | Walmart INC | Stock-Consumer Staples | 1.10% | +0.20% | +6.71% | |
| 26 | GS | Goldman Sachs Group INC | Stock-Financials | 1.08% | +0.21% | +25.88% | |
| 27 | QUAL | Ishares Msci USA Quality Fac | ETF-Other | 1.06% | — | -0.33% | |
| 28 | SCHW | Schwab (charles) CORP | Stock-Financials | 1.05% | — | +0.45% | |
| 29 | TOST | Toast Inc-class A | Stock-Tech | 1.02% | +1.02% | NEW | |
| 30 | VOT | Vanguard Mid-cap Growth ETF | ETF-Other | 1.00% | -0.06% | -0.64% | |
| 31 | IBKR | Interactive Brokers Gro-cl A | Stock-Financials | 0.98% | — | +1.22% | |
| 32 | VGT | Vanguard Info Tech ETF | ETF-Tech | 0.94% | -0.06% | -0.59% | |
| 33 | EFV | Ishares Msci Eafe Value ETF | ETF-Other | 0.93% | — | -0.53% | |
| 34 | CRWD | Crowdstrike Holdings INC - A | Stock-Tech | 0.91% | -0.15% | +0.87% | |
| 35 | LZ | Legalzoomcom INC | Stock-Other | 0.86% | -0.60% | — | |
| 36 | PANW | Palo Alto Networks INC | Stock-Tech | 0.83% | -0.10% | +0.49% | |
| 37 | ETN | Eaton Corporation plc | Stock-Industrials | 0.82% | +0.15% | +7.25% | |
| 38 | GEV | GE Vernova INC | Stock-Industrials | 0.82% | +0.82% | NEW | |
| 39 | DOV | Dover CORP | Stock-Industrials | 0.79% | — | +0.64% | |
| 40 | ORLY | O'reilly Automotive INC | Stock-Consumer Disc | 0.78% | — | +0.87% | |
| 41 | HD | Home Depot INC | Stock-Consumer Disc | 0.77% | -0.07% | -6.80% | |
| 42 | EFG | Ishares Msci Eafe Growth ETF | ETF-Other | 0.74% | — | -0.43% | |
| 43 | BABA | Alibaba Group Holding-sp Adr | Stock-Consumer Disc | 0.72% | -0.10% | +1.09% | |
| 44 | JEPI | Jpmorgan Equity Premium Inco | ETF-Other | 0.72% | -0.35% | -34.20% | |
| 45 | CVX | Chevron CORP | Stock-Energy | 0.71% | +0.20% | — | |
| 46 | V | Visa Inc-class A Shares | Stock-Financials | 0.68% | -0.09% | -0.54% | |
| 47 | CEG | Constellation Energy | Stock-Utilities | 0.60% | -0.13% | +1.43% | |
| 48 | AVGO | Broadcom INC | Stock-Tech | 0.59% | -0.07% | -2.46% | |
| 49 | CMG | Chipotle Mexican Grill INC | Stock-Consumer Disc | 0.59% | -0.09% | -1.61% | |
| 50 | IYW | Ishares Ustechnology ETF | ETF-Tech | 0.55% | — | -0.42% |
Performance for Q3 2026
+1.9%
Performance Last 4 Quarters
+15.7%
Based on 85% of reported portfolio value with available pricing
Mainstream Capital Management LLC's most significant position changes for 2026-03-31: Sold out: Salesforce INC (CRM); New buy: Toast Inc-class A (TOST); New buy: GE Vernova INC (GEV); Sold out: Bxp INC (BXP); New buy: Ati INC (ATI).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | GSST | Goldman Sachs Ultra Short Bo | +1.8% | +39.56% | Add |
| 2 | GLW | Corning INC | +0.5% | +0.17% | Add |
| 3 | JPST | Jpmorgan Ultra-short Income | +0.4% | +0.61% | Add |
| 4 | CAVA | Cava Group INC | +0.4% | +2.57% | Add |
| 5 | COST | Costco Wholesale CORP | +0.3% | +0.04% | Add |
| 6 | GS | Goldman Sachs Group INC | +0.2% | +25.88% | Add |
| 7 | CVX | Chevron CORP | +0.2% | — | Unchanged |
| 8 | WMT | Walmart INC | +0.2% | +6.71% | Add |
| 9 | GLD | Spdr Gold Shares | +0.2% | +0.19% | Add |
| 10 | ETN | Eaton Corporation plc | +0.2% | +7.25% | Add |
| 11 | TJX | Tjx Companies INC | +0.1% | +1.12% | Add |
| 12 | AMAT | Applied Materials INC | +0.1% | -3.29% | Trim |
| 13 | SPY | Ss Spdr S&p 500 ETF Trust-us | 0% | — | Unchanged |
| 14 | BRK-B | Berkshire Hathaway Inc-cl B | 0% | +0.11% | Add |
| 15 | IVV | Ishares Core S&p 500 ETF | -0.1% | -0.32% | Trim |
| 16 | AS | Amer Sports, Inc. | -0.1% | +0.71% | Add |
| 17 | VOT | Vanguard Mid-cap Growth ETF | -0.1% | -0.64% | Trim |
| 18 | VGT | Vanguard Info Tech ETF | -0.1% | -0.59% | Trim |
| 19 | HD | Home Depot INC | -0.1% | -6.80% | Trim |
| 20 | UBER | Uber Technologies INC | -0.1% | -2.98% | Trim |
| 21 | AVGO | Broadcom INC | -0.1% | -2.46% | Trim |
| 22 | JPM | Jpmorgan Chase & Co | -0.1% | +1.32% | Add |
| 23 | V | Visa Inc-class A Shares | -0.1% | -0.54% | Trim |
| 24 | CMG | Chipotle Mexican Grill INC | -0.1% | -1.61% | Trim |
| 25 | PANW | Palo Alto Networks INC | -0.1% | +0.49% | Add |
| 26 | BABA | Alibaba Group Holding-sp Adr | -0.1% | +1.09% | Add |
| 27 | NVDA | Nvidia CORP | -0.1% | +0.31% | Add |
| 28 | CEG | Constellation Energy | -0.1% | +1.43% | Add |
| 29 | CRWD | Crowdstrike Holdings INC - A | -0.2% | +0.87% | Add |
| 30 | GOOGL | Alphabet Inc-cl A | -0.2% | -2.69% | Trim |
| 31 | LLY | Eli Lilly & Co | -0.2% | +0.26% | Add |
| 32 | IWF | Ishares Russell 1000 Growth | -0.2% | -1.36% | Trim |
| 33 | TSLA | Tesla INC | -0.2% | +1.73% | Add |
| 34 | GOOG | Alphabet Inc-cl C | -0.3% | +0.37% | Add |
| 35 | AAPL | Apple INC | -0.3% | -0.52% | Trim |
| 36 | MSFT | Microsoft CORP | -0.3% | +1.58% | Add |
| 37 | JEPI | Jpmorgan Equity Premium Inco | -0.4% | -34.20% | Trim |
| 38 | META | Meta Platforms Inc-class A | -0.4% | -0.20% | Trim |
| 39 | AMZN | Amazon.com INC | -0.4% | -1.48% | Trim |
| 40 | LZ | Legalzoomcom INC | -0.6% | — | Unchanged |
| 41 | CRM | Salesforce INC | — | EXIT | Sold out |
| 42 | TOST | Toast Inc-class A | — | NEW | New buy |
| 43 | GEV | GE Vernova INC | — | NEW | New buy |
| 44 | BXP | Bxp INC | — | EXIT | Sold out |
| 45 | ATI | Ati INC | — | NEW | New buy |
| 46 | NKE | Nike INC -cl B | — | EXIT | Sold out |
| 47 | GBTC | Grayscale Bitcoin Trust ETF | — | EXIT | Sold out |
| 48 | CBRE | Cbre Group INC - A | — | EXIT | Sold out |
| 49 | EMXC | Ishares Msci Emr Mrk Ex Chna | — | NEW | New buy |
| 50 | SCHD | Schwab US Dvd Equity ETF | — | NEW | New buy |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-04-17 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-01-21 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-10-20 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-07-15 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-04-28 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-02-06 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-10-31 | 13F-HR | View on EDGAR |
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