Institutional Manager · CIK 0002043084
Mainstream Capital Management LLC
LOS ANGELES, CA · File #028-24412
Latest AUM
$152.8M
Positions
88
Top-10 Concentration
52.1%
Filings
6
Portfolio Value Over Time
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| ADD | GOLDMAN SACHS ULTRA SHORT BOND ETF | NVGLF | +91,541 | +$4.6M | -$7,963 |
| ADD | NETFLIX INC COM | NFLX | +20,699 | +$1.9M | -$2.5M |
| REDUCE | JPMORGAN ULTRA-SHORT INCOME ETF | 46641Q837 | -31,945 | -$1.6M | -$61,852 |
| NEW | CORNING INC COM | GLW | +14,157 | +$1.2M | $0 |
| EXITED | AT&T INC COM | 00206R102 | -24,988 | -$705,661 | $0 |
| REDUCE | ISHARES RUSSELL 1000 GROWTH ETF | 464287614 | -952 | -$450,582 | +$47,741 |
| REDUCE | ISHARES RUSSELL 1000 VALUE ETF | 464287598 | -1,594 | -$335,282 | +$112,010 |
| ADD | STATE STREET TECHNOLOGY SELECT SECTOR SPDR ETF | 81369Y803 | +1,938 | +$279,014 | -$267,231 |
| NEW | PALANTIR TECHNOLOGIES INC CL A | PLTR | +1,563 | +$277,823 | $0 |
| NEW | STARBUCKS CORP COM | SBUX | +3,121 | +$262,819 | $0 |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 202588 pos · $152.8M
- 13F HOLDINGS REPORTQ/E Sep 202587 pos · $150.4M
- 13F HOLDINGS REPORTQ/E Jun 202584 pos · $137.5M
- 13F HOLDINGS REPORTQ/E Mar 202586 pos · $126.2M
- 13F HOLDINGS REPORTQ/E Dec 2024322 pos · $142.6M
- 13F HOLDINGS REPORTQ/E Sep 202484 pos · $117.6M
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | JPMORGAN ULTRA-SHORT INCOME ETF | 46641Q837 | 409,853 | $20.7M | 15.21% |
| 2 | APPLE INC COM | AAPL | 35,740 | $9.7M | 7.13% |
| 3 | AMAZON COM INC COM | AMZN | 31,621 | $7.3M | 5.35% |
| 4 | GOLDMAN SACHS ULTRA SHORT BOND ETF | NVGLF | 126,161 | $6.4M | 4.67% |
| 5 | ALPHABET INC CAP STK CL C | GOOG | 20,163 | $6.3M | 4.64% |
| 6 | NVIDIA CORPORATION COM | NVDA | 27,655 | $5.2M | 3.78% |
| 7 | META PLATFORMS INC CL A | META | 7,580 | $5.0M | 3.67% |
| 8 | ISHARES RUSSELL 1000 GROWTH ETF | 464287614 | 8,811 | $4.2M | 3.06% |
| 9 | ISHARES RUSSELL 1000 VALUE ETF | 464287598 | 15,000 | $3.2M | 2.31% |
| 10 | ISHARES CORE S&P 500 ETF | 464287200 | 4,437 | $3.0M | 2.23% |
| 11 | ALPHABET INC CAP STK CL A | GOOG | 9,310 | $2.9M | 2.14% |
| 12 | JPMORGAN CHASE & CO. COM | VYLD | 8,641 | $2.8M | 2.04% |
| 13 | BERKSHIRE HATHAWAY INC DEL CL B NEW | BRK-A | 5,390 | $2.7M | 1.99% |
| 14 | TESLA INC COM | TSLA | 5,888 | $2.6M | 1.94% |
| 15 | MICROSOFT CORP COM | MSFT | 5,309 | $2.6M | 1.88% |
| 16 | ELI LILLY & CO COM | LLY | 2,286 | $2.5M | 1.80% |
| 17 | SPDR GOLD SHARES | GLD | 6,173 | $2.4M | 1.79% |
| 18 | SPDR S&P 500 ETF TRUST | SPY | 3,473 | $2.4M | 1.74% |
| 19 | LEGALZOOM COM INC COM | LZ | 225,000 | $2.2M | 1.64% |
| 20 | NETFLIX INC COM | NFLX | 23,001 | $2.2M | 1.58% |