Mainstream Capital Management LLC
Long book
$149.1M
Q1 2026
Positions
88
Top-10 weight
47%
concentration
Last quarter
+12.3%
SPY +14.8%
Turnover
11%
of book per quarter
Strategy in plain words
auto-generated from filingsMainstream Capital Management LLC is an institutional manager, running a $149.1M US long book across 88 positions.
The portfolio is moderately concentrated (top 10 ≈ 47% of the book). Turnover is modest: positions are typically held for years. Current anchor positions: JPMORGAN ULTRA-SHORT INCOME, APPLE INC, GOLDMAN SACHS ULTRA SHORT BO, AMAZON.COM INC, ALPHABET INC-CL C.
Over the last 7 quarters its long book ran on average 0.4pp per quarter behind the S&P 500, beating the index in 2 of 7 quarters. Signal value of individual moves is limited — treat changes as weak evidence.
Implied long-book return vs S&P 500
methodology: positions priced quarterly, no shorts/options Fund long book S&P 500
Q3 2024
+5.6%
Q4 2024
-4.1%
Q1 2025
+9.6%
Q2 2025
+6.7%
Q3 2025
+1.7%
Q4 2025
-4.4%
Q1 2026
+12.3%
Sector allocation
Technology 43%
Consumer discretionary 23%
Financials 12%
Industrials 10%
Services media 6%
Healthcare 3%
Energy 1%
Utilities 1%
Long book by quarter
What does Mainstream Capital own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| AAPL APPLE INC | Technology | 35.6K | $9.0M | 6.1% | -0.5% |
| AMZN AMAZON.COM INC | Consumer discretionary | 31.2K | $6.5M | 4.4% | -1.5% |
| GOOG ALPHABET INC-CL C | Technology | 20.2K | $5.8M | 3.9% | +0.4% |
| NVDA NVIDIA CORP | Technology | 27.7K | $4.8M | 3.2% | +0.3% |
| META META PLATFORMS INC-CLASS A | Technology | 7.6K | $4.3M | 2.9% | -0.2% |
| GOOGL ALPHABET INC-CL A | Technology | 9.1K | $2.6M | 1.7% | -2.7% |
| BRK/B BERKSHIRE HATHAWAY INC-CL B | Financials | 5.4K | $2.6M | 1.7% | +0.1% |
| JPM JPMORGAN CHASE & CO | Financials | 8.8K | $2.6M | 1.7% | +1.3% |
| COST COSTCO WHOLESALE CORP | Consumer discretionary | 2.3K | $2.3M | 1.6% | 0.0% |
| TSLA TESLA INC | Industrials | 6.0K | $2.2M | 1.5% | +1.7% |
| NFLX NETFLIX INC | Services media | 23.0K | $2.2M | 1.5% | +0.1% |
| LLY ELI LILLY & CO | Healthcare | 2.3K | $2.1M | 1.4% | +0.3% |
| MSFT MICROSOFT CORP | Technology | 5.4K | $2.0M | 1.3% | +1.6% |
| TJX TJX COMPANIES INC | Consumer discretionary | 12.3K | $2.0M | 1.3% | +1.1% |
| GLW CORNING INC | Industrials | 14.2K | $1.9M | 1.3% | +0.2% |
| CAVA CAVA GROUP INC | Consumer discretionary | 21.3K | $1.7M | 1.2% | +2.6% |
| WMT WALMART INC | Consumer discretionary | 13.1K | $1.6M | 1.1% | +6.7% |
| GS GOLDMAN SACHS GROUP INC | Financials | 1.9K | $1.6M | 1.1% | +25.9% |
| SCHW SCHWAB (CHARLES) CORP | Financials | 16.7K | $1.6M | 1.1% | +0.5% |
| TOST TOAST INC-CLASS A | Technology | 57.4K | $1.5M | 1.0% | New |
| IBKR INTERACTIVE BROKERS GRO-CL A | Financials | 21.8K | $1.5M | 1.0% | +1.2% |
| CRWD CROWDSTRIKE HOLDINGS INC - A | Technology | 3.5K | $1.4M | 0.9% | +0.9% |
| LZ LEGALZOOMCOM INC | Technology | 225.0K | $1.3M | 0.9% | Held |
| PANW PALO ALTO NETWORKS INC | Technology | 7.7K | $1.2M | 0.8% | +0.5% |
| ETN EATON CORP PLC | Industrials | 3.4K | $1.2M | 0.8% | +7.3% |
| GEV GE VERNOVA INC | Industrials | 1.4K | $1.2M | 0.8% | New |
| DOV DOVER CORP | Industrials | 5.6K | $1.2M | 0.8% | +0.6% |
| ORLY O'REILLY AUTOMOTIVE INC | Consumer discretionary | 12.6K | $1.2M | 0.8% | +0.9% |
| HD HOME DEPOT INC | Consumer discretionary | 3.5K | $1.1M | 0.8% | -6.8% |
| CVX CHEVRON CORP | Energy | 5.1K | $1.1M | 0.7% | Held |
| V VISA INC-CLASS A SHARES | Services media | 3.3K | $1.0M | 0.7% | -0.5% |
| CEG CONSTELLATION ENERGY | Utilities | 3.2K | $891K | 0.6% | +1.4% |
| AVGO BROADCOM INC | Technology | 2.9K | $884K | 0.6% | -2.5% |
| CMG CHIPOTLE MEXICAN GRILL INC | Consumer discretionary | 27.5K | $880K | 0.6% | -1.6% |
| UBER UBER TECHNOLOGIES INC | Services media | 11.1K | $800K | 0.5% | -3.0% |
| AS AMER SPORTS INC | Other | 23.1K | $762K | 0.5% | +0.7% |
| HNST HONEST CO INC/THE | Consumer discretionary | 236.1K | $694K | 0.5% | Held |
| AMD ADVANCED MICRO DEVICES | Technology | 3.2K | $645K | 0.4% | Held |
| MA MASTERCARD INC - A | Services media | 1.2K | $582K | 0.4% | Held |
| AMAT APPLIED MATERIALS INC | Technology | 1.5K | $502K | 0.3% | -3.3% |
| BA BOEING CO/THE | Industrials | 1.9K | $382K | 0.3% | +2.1% |
| AXP AMERICAN EXPRESS CO | Financials | 1.3K | $381K | 0.3% | -0.6% |
| MCD MCDONALD'S CORP | Consumer discretionary | 1.2K | $369K | 0.2% | Held |
| DRI DARDEN RESTAURANTS INC | Consumer discretionary | 1.5K | $295K | 0.2% | Held |
| SBUX STARBUCKS CORP | Consumer discretionary | 3.1K | $280K | 0.2% | Held |
| PLTR PALANTIR TECHNOLOGIES INC-A | Technology | 1.9K | $275K | 0.2% | +20.3% |
| ATI ATI INC | Industrials | 1.7K | $247K | 0.2% | New |
| DIS WALT DISNEY CO/THE | Services media | 2.4K | $230K | 0.2% | -2.8% |
| RIOT RIOT PLATFORMS INC | Financials | 16.7K | $206K | 0.1% | Held |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | Apr 17, 2026 | 88 | $149.1M | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Jan 21, 2026 | 88 | $152.8M | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Oct 20, 2025 | 87 | $150.4M | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Jul 15, 2025 | 84 | $137.5M | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | Apr 28, 2025 | 86 | $126.2M | canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Feb 6, 2025 | 322 | $142.6M | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Oct 31, 2024 | 84 | $117.6M | canonical | SEC ↗ |
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