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Mainstream Capital Management LLC — 13F Holdings & Portfolio

CIK 2043084 · latest 13F-HR filed 2026-10-23

Backtest portfolio

Mainstream Capital Management LLC manages $169.9M in 13F-reported U.S. long-equity assets across 302 reported positions as of its 2026-09-30 13F-HR filing. Its largest disclosed positions are JPST (9.97%), AAPL (6.60%), GSST (5.62%). Quarter over quarter (versus its 2026-06-30 filing) the fund opened 215 new positions and exited 3; 17 existing positions rose in reported value and 47 fell.

AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.

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AUM
$169.9M

Long-equity book

Holdings
302

Distinct positions

Period
2026-09-30

Filed 2026-10-23

Q/Q Activity
+215 / −3 / ↑17 / ↓47

vs 2026-06-30

Portfolio charts

Latest quarter's book, what changed, and how the portfolio has evolved across filings.

Portfolio map

Q3 26
JPST10.0% · -16%AAPL6.6% · -1%GSST5.6% · +1%AMZN4.5% · -1%NVDA4.1% · +10%GOOG3.9% · -4%META3.2% · +1%CRWD2.2% · +306%MSFT2.1% · +31%IVV1.8% · -7%PANW1.8% · -2%GOOGL1.8% · -1%IWF1.7% · -33%JPM1.7% · -3%BRK.B1.6% · -0%LLY1.6% · +1%GLW1.4% · +9%AMD1.4% · -3%SPY1.3% · -14%IWD1.3% · -38%QUAL1.3% · +24%COST1.3% · +1%TSLA1.2% · -1%CRXP1.2% · newIBKR1.1% · +4%EFV1.1% · +24%GLD1.0% · -18%IVW1.0% · +74%TJX1.0% · +2%GS1.0% · -2%NFLX1.0% · +2%GEV1.0% · +5%TOST0.9% · -7%ETN0.9% · +2%IEMG0.9% · +55%SCHW0.9% · -8%VGT0.8% · -29%IBM0.8% · -2%DYNF0.8% · +219%VOT0.7% · -25%VOE0.7% · -30%WMT0.7% · -10%CAVA0.7% · +1%ORLY0.7% · +6%V0.7% · -2%LZ0.7% · 0%IVE0.6% · +290%AVGO0.6% · -2%EFG0.6% · -20%IYW0.6% · -21%CEG0.6% · +18%CVX0.5% · -13%AMAT0.4% · -0%OEF0.4% · newAS0.4% · +13%XLK0.4% · -6%PLTR0.3% · +50%MA0.3% · -4%JEPI0.3% · -13%CMG0.3% · -15%

Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.

Sector mix

% of 13F value

Sectors from each company's SIC code; funds and ETFs grouped separately.

Biggest buys and sells

Q2 26 → Q3 26

Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.

13F assets and positions

4 quarters

Total reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.

Top positions over time

reported value

The eight largest current positions, valued at each quarter end.

Concentration

top 10 = 44.1%

Cumulative share of the portfolio held in the largest N positions.

Firm Profile & Key People

As of the firm’s regulatory filing dated Mar 28, 2013.

Assets Under Management
$232.9M
Discretionary
$232.9M
Employees
8
Accounts
5
Address
101 WEST SPRING STREET
4TH FLOOR
NEW ALBANY, IN 47150
Phone
(812) 981-8100
Website
Name Title / Status Ownership Type
GERNERT, WILLIAM, RUDOLPH ControlMEMBER/DIRECTOR OF BUSINESS STRATEGY
since Jul 1997
25–50%Individual
JENKINS, WILLIAM, HOWARD ControlMEMBER/MANAGER
since Jul 1997
50–75%Individual
CRAIG, CHARLES, FREDERICKPORTFOLIO MANAGER
since Jun 2002
Less than 5%Individual
ELLINGTON, SAMDIRECTOR, PORTFOLIO MANAGEMENT & CLIENT SERVICE
since Jul 2010
Less than 5%Individual
HULLS, DIANE, JEANDIRECTOR (CHIEF COMPLIANCE OFFICER)
since Jul 1997
Less than 5%Individual
Ownership & leadership changes · 2 filings with changes since Mar 30, 2012

From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.

Mar 28, 2013 filing
  • No longer listedMULLINS, STEPHEN, GERARD · CLIENT SERVICE AND MARKETING ADVISER · Less than 5% · listed since Feb 2006
  • ChangedELLINGTON, SAM · title DIRECTOR, PRODUCT MANAGEMENT, SERVICE & MARKETING → DIRECTOR, PORTFOLIO MANAGEMENT & CLIENT SERVICE
Jul 11, 2012 filing
  • No longer listedMCCLELLAND, MARTIN, NELSON · MEMBER/MANAGING DIRECTOR · Less than 5% · control person · listed since Jul 2006
  • No longer listedMCCLELLAND, MARTIN, NELSON · SHAREHOLDER · 75% or more · indirect via THE REGENT GROUP, INC. · control person · listed since Oct 1997
  • No longer listedNAISER, STEVEN, TODD · PORTFOLIO MANAGER AND DIRECTOR · Less than 5% · listed since Jul 2006
  • No longer listedTHE REGENT GROUP, INC. · MEMBER · 10–25% · listed since Jun 2006
  • ChangedJENKINS, WILLIAM, HOWARD · ownership 25–50% → 50–75%
Mar 30, 2012 filing (earliest on record)
  • ListedCRAIG, CHARLES, FREDERICK · PORTFOLIO MANAGER · Less than 5%
  • ListedELLINGTON, SAM · DIRECTOR, PRODUCT MANAGEMENT, SERVICE & MARKETING · Less than 5%
  • ListedGERNERT, WILLIAM, RUDOLPH · MEMBER/DIRECTOR OF BUSINESS STRATEGY · 25–50% · control person
  • ListedHULLS, DIANE, JEAN · DIRECTOR (CHIEF COMPLIANCE OFFICER) · Less than 5%
  • ListedJENKINS, WILLIAM, HOWARD · MEMBER/MANAGER · 25–50% · control person
  • ListedMCCLELLAND, MARTIN, NELSON · MEMBER/MANAGING DIRECTOR · Less than 5% · control person
  • ListedMCCLELLAND, MARTIN, NELSON · SHAREHOLDER · 75% or more · indirect via THE REGENT GROUP, INC. · control person
  • ListedMULLINS, STEPHEN, GERARD · CLIENT SERVICE AND MARKETING ADVISER · Less than 5%
  • ListedNAISER, STEVEN, TODD · PORTFOLIO MANAGER AND DIRECTOR · Less than 5%
  • ListedTHE REGENT GROUP, INC. · MEMBER · 10–25%

Quarter-over-quarter changes

Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.

Mainstream Capital Management LLC Holdings (2026-09-30)

Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).

# Issuer Symbol CUSIP Value Weight Shares Type
1 JPMORGAN ULTRA-SHORT INCOME ETF JPST 46641Q837 $16.9M 9.97% 336,297 SH
2 APPLE INC COM AAPL 037833100 $11.2M 6.60% 33,675 SH
3 GOLDMAN SACHS ULTRA SHORT BOND ETF GSST 381430230 $9.6M 5.62% 189,302 SH
4 AMAZON COM INC COM AMZN 023135106 $7.7M 4.51% 30,737 SH
5 NVIDIA CORPORATION COM NVDA 67066G104 $7.0M 4.10% 30,526 SH
6 ALPHABET INC CAP STK CL C GOOG 02079K107 $6.6M 3.91% 19,504 SH
7 META PLATFORMS INC CL A META 30303M102 $5.5M 3.23% 7,555 SH
8 CROWDSTRIKE HLDGS INC CL A CRWD 22788C105 $3.7M 2.19% 14,033 SH
9 MICROSOFT CORP COM MSFT 594918104 $3.6M 2.14% 7,075 SH
10 ISHARES CORE S&P 500 ETF IVV 464287200 $3.1M 1.81% 4,023 SH
11 PALO ALTO NETWORKS INC COM PANW 697435105 $3.0M 1.77% 7,570 SH
12 ALPHABET INC CAP STK CL A GOOGL 02079K305 $3.0M 1.76% 8,712 SH
13 ISHARES RUSSELL 1000 GROWTH ETF IWF 464287614 $2.9M 1.68% 22,805 SH
14 JPMORGAN CHASE & CO COM JPM 46625H100 $2.8M 1.66% 8,515 SH
15 BERKSHIRE HATHAWAY INC DEL CL B NEW BRK.B 084670702 $2.7M 1.58% 5,386 SH
16 ELI LILLY & CO COM LLY 532457108 $2.6M 1.55% 2,278 SH
17 CORNING INC COM GLW 219350105 $2.4M 1.41% 15,593 SH
18 ADVANCED MICRO DEVICES INC COM AMD 007903107 $2.4M 1.40% 3,900 SH
19 STATE STREET SPDR S&P 500 ETF SPY 78462F103 $2.3M 1.34% 2,989 SH
20 ISHARES RUSSELL 1000 VALUE ETF IWD 464287598 $2.3M 1.33% 9,119 SH
21 ISHARES MSCI USA QUALITY FACTOR ETF QUAL 46432F339 $2.3M 1.33% 10,148 SH
22 COSTCO WHOLESALE CORPORATION COM COST 22160K105 $2.1M 1.26% 2,347 SH
23 TESLA INC COM TSLA 88160R101 $2.1M 1.24% 5,947 SH
24 COLUMBIA CORE PLUS BOND ETF CRXP 19761L771 $2.1M 1.22% 110,289 SH
25 INTERACTIVE BROKERS GROUP INC COM CL A IBKR 45841N107 $1.9M 1.15% 22,789 SH
26 ISHARES MSCI EAFE VALUE ETF EFV 464288877 $1.8M 1.07% 23,023 SH
27 SPDR GOLD SHARES GLD 78463V107 $1.7M 1.03% 4,582 SH
28 ISHARES S&P 500 GROWTH ETF IVW 464287309 $1.7M 1.00% 11,950 SH
29 TJX COS INC NEW COM TJX 872540109 $1.7M 0.98% 12,616 SH
30 GOLDMAN SACHS GROUP INC COM GS 38141G104 $1.7M 0.98% 1,851 SH
31 NETFLIX INC. COM NFLX 64110L106 $1.6M 0.96% 23,379 SH
32 GE VERNOVA INC COM GEV 36828A101 $1.6M 0.95% 1,705 SH
33 TOAST INC CL A TOST 888787108 $1.5M 0.90% 52,988 SH
34 EATON CORP PLC SHS ETN G29183103 $1.5M 0.90% 3,544 SH
35 ISHARES CORE MSCI EMERGING MARKETS ETF IEMG 46434G103 $1.5M 0.87% 18,214 SH
36 CHARLES SCHWAB CORP (THE) COM SCHW 808513105 $1.4M 0.85% 14,829 SH
37 VANGUARD INFORMATION TECHNOLOGY ETF VGT 92204A702 $1.4M 0.85% 11,483 SH
38 INTERNATIONAL BUSINESS MACHS COM IBM 459200101 $1.4M 0.85% 6,528 SH
39 ISHARES U.S. EQUITY FACTOR ROTATION ACTIVE ETF DYNF 09290C103 $1.3M 0.75% 18,405 SH
40 VANGUARD MORNINGSTAR MID-CAP GROWTH ETF VOT 922908538 $1.3M 0.74% 4,315 SH
41 VANGUARD MORNINGSTAR MID-CAP VALUE ETF VOE 922908512 $1.2M 0.73% 6,334 SH
42 WALMART INC COM WMT 931142103 $1.2M 0.71% 11,643 SH
43 CAVA GROUP INC COM CAVA 148929102 $1.2M 0.69% 21,612 SH
44 OREILLY AUTOMOTIVE INC COM ORLY 67103H107 $1.1M 0.67% 13,301 SH
45 VISA INC COM CL A V 92826C839 $1.1M 0.66% 3,140 SH
46 LEGALZOOM COM INC COM LZ 52466B103 $1.1M 0.66% 200,000 SH
47 ISHARES S&P 500 VALUE ETF IVE 464287408 $1.0M 0.60% 4,483 SH
48 BROADCOM INC COM AVGO 11135F101 $976.7K 0.58% 2,781 SH
49 ISHARES MSCI EAFE GROWTH ETF EFG 464288885 $948.6K 0.56% 7,916 SH
50 ISHARES U.S. TECHNOLOGY ETF IYW 464287721 $942.5K 0.55% 3,558 SH
Filing History
Period Filed AUM Holdings Accession
2026-09-30 2026-10-23 $169.9M 302 0002043084-26-000005
2026-06-30 2026-07-15 $166.1M 90 0002043084-26-000003
2026-03-31 2026-04-17 $149.1M 88 0002043084-26-000002
2025-12-31 2026-01-21 $152.8M 88 0002043084-26-000001
Filer Information
Address
3435 WILSHIRE BLVD
SUITE 1100
LOS ANGELES, CA 90010
Phone
(213) 365-6773
Filing Manager
Mainstream Capital Management LLC
LOS ANGELES, CA
Signatory
Dixon Karmindro
Managing Partner