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Quantum Portfolio Management LLC — 13F Holdings & Portfolio

CIK 2003672 · latest 13F-HR filed 2026-08-14

Backtest portfolio

Quantum Portfolio Management LLC manages $278.3M in 13F-reported U.S. long-equity assets across 557 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are AAPL (5.24%), NVDA (3.47%), EEM (2.39%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 289 new positions and exited 21; 124 existing positions rose in reported value and 68 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.

Loading holdings…
AUM
$278.3M

Long-equity book

Holdings
557

Distinct positions

Period
2026-06-30

Filed 2026-08-14

Q/Q Activity
+289 / −21 / ↑124 / ↓68

vs 2026-03-31

Portfolio charts

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

Portfolio map

Q2 26
AAPL5.2% · -0%NVDA3.5% · -0%EEM2.4% · -4%FTRB1.9% · +1%GOOG1.8% · -0%MU1.8% · -17%EFV1.8% · -16%AGX1.7% · -23%FNDE1.5% · +22%IWO1.5% · -10%IWF1.5% · +278%IVW1.4% · -1%GOOGL1.4% · +1%LRCX1.4% · +1%MSFT1.3% · -6%AMZN1.2% · +1%IVLU1.2% · -3%FNDF1.2% · +21%IWD1.1% · -1%AVGO1.1% · -4%VWO1.0% · +30%SCHV0.9% · -6%ROKU0.9% · +318%CHRD0.8% · +206%TSM0.8% · -6%META0.8% · -6%IDV0.8% · +29%FYC0.7% · +23%HPE0.7% · newTIGO0.7% · +5%DEM0.6% · +5%STX0.6% · -16%MLPX0.6% · +1%WMB0.6% · +1%VRT0.6% · -5%JNK0.6% · +3%MCK0.6% · -1%ASML0.6% · -1%APH0.6% · +1%DGX0.6% · +0%QQQ0.5% · +17%SGI0.5% · -2%TTWO0.5% · -1%COST0.5% · +1%PLTR0.5% · +3%QTUM0.5% · +22%TER0.5% · +15%FIVE0.5% · -1%MTZ0.5% · +9%LH0.5% · +0%WDC0.5% · -1%DOV0.5% · -0%BEN0.5% · -5%PAVE0.4% · +1%JPM0.4% · -0%R0.4% · +72%SPG0.4% · -3%XSMO0.4% · +6%EBC0.4% · +2%IWX0.4% · +28%

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

Q1 26 → Q2 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

2 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 = 23.1%

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

Firm Profile & Key People

As of the firm’s regulatory filing dated Apr 27, 2026.

Assets Under Management
$339.6M
Discretionary
$304.9M
Employees
7
Accounts
234
Address
10 E. 53RD STREET
SUITE 1400
NEW YORK, NY 10022
Phone
(212) 466-6760
Website
Name Title / Status Ownership Type
ARAX WEALTH MANAGEMENT, LLC ControlOWNER
since Jan 2024
50–75%Domestic Entity
CUTTER, MARIA ControlPARTNER-VP OPERATIONS
since Feb 2023
Less than 5%Individual
Duprau, Jon, A ControlMANAGING PARTNER
since Feb 2023
Less than 5%Individual
SUPERDEX MIV LLC ControlOWNER
since Jan 2024
25–50%Domestic Entity
DURETTE, MICHAEL, JAMESCHIEF COMPLIANCE OFFICER
since Apr 2026
Less than 5%Individual
ARAX BUSINESS TRUST, LLC Control
Indirect owner via ARAX INVESTMENT PARTNERS, LLC
OWNER
since Jan 2023
75% or moreDomestic Entity
ARAX INVESTMENT PARTNERS, LLC Control
Indirect owner via ARAX MIDCO LLC
OWNER
since Jun 2023
75% or moreDomestic Entity
ARAX MIDCO LLC Control
Indirect owner via ARAX WEALTH MANAGEMENT, LLC
OWNER
since Aug 2023
75% or moreDomestic Entity
FORESIDE INVESTMENT COMPANY Control
Indirect owner via INDEX CAPITAL PARTNERS LLC
OWNER
since Jan 2024
75% or moreDomestic Entity
INDEX CAPITAL PARTNERS LLC Control
Indirect owner via SUPERDEX MIV LLC
OWNER
since Jan 2024
75% or moreDomestic Entity
REDBIRD CAPITAL PARTNERS FUND IV GEN PAR LLC Control
Indirect owner via ARAX BUSINESS TRUST, LLC
OWNER
since Jan 2023
General partner, trustee or managerDomestic Entity
Ownership & leadership changes · 5 filings with changes since Apr 6, 2023

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.

Apr 27, 2026 filing
  • No longer listedKEITNER, ANN, FREEMAN · CHIEF COMPLIANCE OFFICER · Less than 5% · listed since Jan 2025
  • AddedDURETTE, MICHAEL, JAMES · CHIEF COMPLIANCE OFFICER · Less than 5%
Mar 28, 2025 filing
  • ChangedCUTTER, MARIA · title PARTNER → PARTNER-VP OPERATIONS
Jan 6, 2025 filing
  • AddedKEITNER, ANN, FREEMAN · CHIEF COMPLIANCE OFFICER · Less than 5%
  • ChangedCUTTER, MARIA · title CHIEF COMPLIANCE OFFICER → PARTNER
Mar 20, 2024 filing
  • No longer listedDuprau, Jon, A · MANAGING DIRECTOR · 75% or more · indirect via GRAMERCY FOUNDATION · control person · listed since Feb 2023
  • No longer listedGRAMERCY FOUNDATION · MEMBER · 75% or more · control person · listed since Jul 2023
  • AddedARAX BUSINESS TRUST, LLC · OWNER · 75% or more · indirect via ARAX INVESTMENT PARTNERS, LLC · control person
  • AddedARAX INVESTMENT PARTNERS, LLC · OWNER · 75% or more · indirect via ARAX MIDCO LLC · control person
  • AddedARAX MIDCO LLC · OWNER · 75% or more · indirect via ARAX WEALTH MANAGEMENT, LLC · control person
  • AddedARAX WEALTH MANAGEMENT, LLC · OWNER · 50–75% · control person
  • AddedFORESIDE INVESTMENT COMPANY · OWNER · 75% or more · indirect via INDEX CAPITAL PARTNERS LLC · control person
  • AddedINDEX CAPITAL PARTNERS LLC · OWNER · 75% or more · indirect via SUPERDEX MIV LLC · control person
  • AddedREDBIRD CAPITAL PARTNERS FUND IV GEN PAR LLC · OWNER · General partner, trustee or manager · indirect via ARAX BUSINESS TRUST, LLC · control person
  • AddedSUPERDEX MIV LLC · OWNER · 25–50% · control person
  • ChangedCUTTER, MARIA · title VICE PRESIDENT/CHIEF COMPLIANCE OFFICER → CHIEF COMPLIANCE OFFICER
  • ChangedDuprau, Jon, A · title MANAGING DIRECTOR → MANAGING PARTNER
Jul 12, 2023 filing
  • No longer listedDuprau, Jon, A · MANAGING DIRECTOR · 75% or more · indirect via FORESIDE INVESTMENT COMPANY · control person · listed since Feb 2023
  • No longer listedFORESIDE INVESTMENT COMPANY · MEMBER · 75% or more · control person · listed since Feb 2023
  • AddedDuprau, Jon, A · MANAGING DIRECTOR · 75% or more · indirect via GRAMERCY FOUNDATION · control person
  • AddedGRAMERCY FOUNDATION · MEMBER · 75% or more · control person
Apr 6, 2023 filing (earliest on record)
  • ListedCUTTER, MARIA · VICE PRESIDENT/CHIEF COMPLIANCE OFFICER · Less than 5% · control person
  • ListedDuprau, Jon, A · MANAGING DIRECTOR · Less than 5% · control person
  • ListedDuprau, Jon, A · MANAGING DIRECTOR · 75% or more · indirect via FORESIDE INVESTMENT COMPANY · control person
  • ListedFORESIDE INVESTMENT COMPANY · MEMBER · 75% or more · control person

Quarter-over-quarter changes

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

Top Adds (vs prior quarter)

Show all 124 →

Top Trims

Show all 68 →

New Positions

Show all 289 →

Exited Positions

Show all 21 →

Quantum Portfolio Management LLC Holdings (2026-06-30)

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 APPLE INC AAPL 037833100 $14.6M 5.24% 50,394 SH
2 NVIDIA CORPORATION NVDA 67066G104 $9.6M 3.47% 48,191 SH
3 ISHARES TR EEM 464287234 $6.7M 2.39% 97,269 SH
4 FEDERATED HERMES ETF TRUST FTRB 31423L404 $5.3M 1.91% 211,261 SH
5 ALPHABET INC GOOG 02079K107 $5.0M 1.81% 14,288 SH
6 MICRON TECHNOLOGY INC MU 595112103 $4.9M 1.78% 4,284 SH
7 ISHARES TR EFV 464288877 $4.9M 1.76% 64,031 SH
8 ARGAN INC AGX 04010E109 $4.6M 1.65% 5,756 SH
9 SCHWAB STRATEGIC TR FNDE 808524730 $4.3M 1.55% 108,584 SH
10 ISHARES TR IWO 464287648 $4.2M 1.50% 10,574 SH
11 ISHARES TR IWF 464287614 $4.1M 1.46% 32,702 SH
12 ISHARES TR IVW 464287309 $4.0M 1.44% 29,223 SH
13 ALPHABET INC GOOGL 02079K305 $3.9M 1.40% 10,895 SH
14 LAM RESEARCH CORP LRCX 512807306 $3.9M 1.39% 8,926 SH
15 MICROSOFT CORP MSFT 594918104 $3.6M 1.29% 9,590 SH
16 AMAZON COM INC AMZN 023135106 $3.4M 1.24% 14,464 SH
17 ISHARES TR IVLU 46435G409 $3.4M 1.20% 80,106 SH
18 SCHWAB STRATEGIC TR FNDF 808524755 $3.2M 1.16% 61,082 SH
19 ISHARES TR IWD 464287598 $3.1M 1.10% 12,660 SH
20 BROADCOM INC AVGO 11135F101 $3.0M 1.07% 7,919 SH
21 VANGUARD INTL EQUITY INDEX F VWO 922042858 $2.8M 1.02% 47,458 SH
22 SCHWAB STRATEGIC TR SCHV 808524409 $2.5M 0.89% 71,423 SH
23 ROKU INC ROKU 77543R102 $2.4M 0.86% 17,292 SH
24 CHORD ENERGY CORPORATION CHRD 674215207 $2.3M 0.82% 19,876 SH
25 META PLATFORMS INC META 30303M102 $2.2M 0.78% 3,849 SH
26 ISHARES TR IDV 464288448 $2.2M 0.78% 52,099 SH
27 FIRST TR EXCHANGE-TRADED ALP FYC 33737M300 $2.1M 0.74% 16,142 SH
28 HEWLETT PACKARD ENTERPRISE C HPE 42824C109 $1.9M 0.68% 42,055 SH
29 MILLICOM INTL CELLULAR S A TIGO L6388F110 $1.9M 0.67% 20,504 SH
30 WISDOMTREE TR DEM 97717W315 $1.8M 0.63% 32,581 SH
31 GLOBAL X FDS MLPX 37954Y293 $1.7M 0.61% 23,181 SH
32 WILLIAMS COS INC WMB 969457100 $1.7M 0.61% 22,783 SH
33 VERTIV HOLDINGS CO VRT 92537N108 $1.7M 0.60% 4,955 SH
34 SPDR SERIES TRUST JNK 78468R622 $1.6M 0.58% 16,883 SH
35 MCKESSON CORP MCK 58155Q103 $1.6M 0.58% 2,151 SH
36 AMPHENOL CORP APH 032095101 $1.6M 0.58% 9,155 SH
37 QUEST DIAGNOSTICS INC DGX 74834L100 $1.6M 0.56% 7,360 SH
38 INVESCO QQQ TR QQQ 46090E103 $1.5M 0.54% 2,053 SH
39 SOMNIGROUP INTERNATIONAL INC SGI 88023U101 $1.5M 0.54% 19,063 SH
40 TAKE-TWO INTERACTIVE SOFTWAR TTWO 874054109 $1.4M 0.50% 5,612 SH
41 COSTCO WHOLESALE CORPORATION COST 22160K105 $1.4M 0.50% 1,493 SH
42 PALANTIR TECHNOLOGIES INC PLTR 69608A108 $1.4M 0.50% 11,961 SH
43 ETF SER SOLUTIONS QTUM 26922A420 $1.4M 0.50% 8,429 SH
44 FIVE BELOW INC FIVE 33829M101 $1.3M 0.48% 7,483 SH
45 MASTEC INC MTZ 576323109 $1.3M 0.48% 3,231 SH
46 LABCORP HOLDINGS INC LH 504922105 $1.3M 0.47% 4,631 SH
47 WESTERN DIGITAL CORP WDC 958102105 $1.3M 0.47% 2,027 SH
48 DOVER CORP DOV 260003108 $1.3M 0.47% 5,770 SH
49 FRANKLIN RESOURCES INC BEN 354613101 $1.3M 0.45% 37,888 SH
50 GLOBAL X FDS PAVE 37954Y673 $1.2M 0.44% 20,835 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-14 $278.3M 557 0001420506-26-001701
2026-03-31 2026-05-01 $229.6M 254 0001172661-26-001580
2026-03-31 2026-04-29 $230.0M 264 0001172661-26-001572
Filer Information
Address
10 E. 53RD STREET
SUITE 1400
NEW YORK, NY 10022
Phone
(212) 466-6761
Filing Manager
Quantum Portfolio Management LLC
NEW YORK, NY
Signatory
Michael Durette
CCO