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Mainstream Capital Management LLC

Location
LOS ANGELES, CA
Portfolio Value
Micro $94,487,244
Diversification
Diversified
Filing Date
Global Rank
#6,205 / 8,645 ▲ 64
Top Industry
Consumer Electronics 11.1%
3Y Alpha vs SPY
+32.7%
Period ended 52 days ago
Filed Jul 15, 2026 · 37d
8 quarters · since Sep 2024

Clone Performance

Nov 2024–Aug 2026 · vs SPY

Hypothetical growth of buying every stock this filer reported holding, rebalancing on each filing and indexed to the same start. Option positions cannot be bought this way and are left out.

Cloned portfolio
+98.7%
SPY
+28.5%
Annualised alpha
+32.2%
Max drawdown
−21.9%

Estimate. 13F holdings are quarter-lagged, so the clone rebalances about 45 days after each period end — when the filing becomes public — and it excludes option and short positions. Returns use comparable raw closes and exclude dividends; a captured split can shorten the simulated window. It tracks 100% of reported value on average across 8 quarters. Past performance does not predict future results.

Portfolio Concentration

54 tracked positions · as of Jun 30, 2026 · Δ vs Mar 31, 2026
Top Position
10.4%
+0.4 pts
Top 5
32.4%
−4.2 pts
Top 10
47.3%
−3.1 pts
HHI
371
Sep 2024 → Jun 2026 · range 371 – 479
Diversified−33

Portfolio Trend

8 quarters · across all stocks

Sector Breakdown

As of Jun 30, 2026
Sector % Portfolio Value
Technology 35.5% $33,551,374
Consumer Cyclical 19.6% $18,511,038
Financial Services 14.1% $13,369,457
Communication Services 9.6% $9,029,927
Industrials 7.0% $6,632,556
Unclassified 5.7% $5,431,260
Consumer Defensive 3.9% $3,638,567
Healthcare 2.9% $2,698,717
Energy 0.9% $846,702
Utilities 0.8% $777,646

Last Quarter's Activity

Export CSV
Jun 30, 2026 vs Mar 31, 2026

Added To

Positions the filer increased
16 positions
Ticker Δ Shares Shares Value Open

Trimmed

Positions the filer reduced
25 positions
Ticker Δ Shares Shares Value Open

New Positions

Positions the filer opened this quarter
2 positions
Ticker Shares Value Open

Sold Out

Positions the filer fully exited
2 positions
Ticker Shares Value Open

Portfolio Positions

Export CSV View 13F filing
54 tracked positions · $94,487,244 total · as of Jun 30, 2026
Showing 1–50 of 54 positions by value · page 1 of 2
Ticker Company Shares Value (USD) % of Portfolio History

Covers the securities this platform tracks: U.S.-listed common stock and the put/call positions reported on it. A 13F can also report security types outside that coverage — preferred shares, bonds, warrants, untracked share classes — so the filing's own declared total can exceed the figures above. The source filing is linked at the top of this table.