Managers / Q4 2025 · view latest →
Mainstream Capital Management LLC
CIK 0002043084 · 3435 WILSHIRE BLVD, SUITE 1100, LOS ANGELES, CA, 90010 · 213-365-6773
Summary
Mainstream Capital Management LLC reported $153M in U.S.-listed holdings across 88 positions for Q4 2025.
Its largest position, Jpmorgan Ultra Short Income Etf, represents 13.6% of the portfolio.
Compared with Q3 2025, the fund opened 3 new positions and exited 2.
Portfolio Metrics
Methodology: turnover is min(value bought, value sold) ÷ average reported value across the two quarters — value-based, so market moves inflate it slightly versus a share-based measure. Concentration and largest position are shares of the filing’s total reported value, options excluded. New/exited counts compare against the prior filed quarter. All figures derive solely from the fund’s 13F filings.
Reported Value by Quarter
Portfolio Composition
- Common Stock · 56.1% · $86M
- ETP · 41.3% · $63M
- Other · 1.2% · $2M
- ADR · 0.8% · $1M
- REIT · 0.5% · $837,967
Quarter-over-Quarter Changes full breakdown →
vs Q3 2025 (amended baseline)
| Issuer | Move | Share Δ | Shares now | Value Δ | Value now |
|---|---|---|---|---|---|
| GLWCORNING INC COM | NEW | +14.2K | 14.2K | +$1M | $1M |
| PLTRPALANTIR TECHNOLOGIES INC CL A | NEW | +1.6K | 1.6K | +$277,823 | $277,823 |
| SBUXSTARBUCKS CORP COM | NEW | +3.1K | 3.1K | +$262,819 | $262,819 |
| NFLXNETFLIX INC COM | ADDED | +20.7K | 23.0K | −$603,340 | $2M |
| GOLDMAN SACHS ULTRA SHORT BOND ETF | ADDED | +91.5K | 126.2K | +$5M | $6M |
| TAT&T INC COM | SOLD OUT | −25.0K | 0 | −$705,661 | $0 |
| PINSPINTEREST INC CL A | SOLD OUT | −7.0K | 0 | −$225,190 | $0 |
| STATE STREET TECHNOLOGY SELECT SECTOR SPDR ETF | ADDED | +1.9K | 3.9K | +$11,783 | $558,028 |
Value changes conflate price moves with buying and selling — share changes are the real signal. Share counts are not split-adjusted.
Holdings — Q4 2025
Filing History
| Quarter | Reported Value | Positions | Filed | Type | Links |
|---|---|---|---|---|---|
| Q1 2026 | $149M | 88 | Apr 17, 2026 | 13F-HR | changes · EDGAR ↗ |
| Q4 2025 | $153M | 88 | Jan 21, 2026 | 13F-HR | changes · EDGAR ↗ |
| Q3 2025 | $150M | 87 | Oct 20, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q2 2025 | $138M | 84 | Jul 15, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q1 2025 | $126M | 86 | Apr 28, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q4 2024 | $143M | 322 | Feb 6, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q3 2024 | $118M | 84 | Oct 31, 2024 | 13F-HR | changes · EDGAR ↗ |
13F filings are due up to 45 days after quarter end, so holdings shown here lag the fund’s current book. Source: original SEC filing on EDGAR ↗.