Quantum Portfolio Management LLC
SEC Form 13F institutional filer · CIK 0002003672
13F-HR · 119 reported holdings · 2026-03-31
Reported long-US-equity value
$0.14B
Top-10 concentration
45.1%
Quantum Portfolio Management LLC — $135M AUM allocation strategy
Quantum Portfolio Management LLC files SEC Form 13F and reports $135M of long US equity value across 119 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 24.3%, followed by Financials 10.9% and Communication Services 7.1%.
The top 10 holdings account for 45% of reported value — a broadly spread portfolio. The sector and industry splits below are of the same reported value. Track quarter-over-quarter adds, trims, new positions and exits below — sourced from SEC 13F filings, public domain.
Quantum Portfolio Management LLC — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$135M
total across 119 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
45% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$IVZ +568K sh · +$1.45M+$SCHW +42.2K sh · +$2.2M+$IYY +40.5K sh · +$1.74M
Biggest trims (shares)
−$AMCR −60.5K sh · +$654K−$ORLY −17K sh · −$1.55M−$CNP −12.2K sh · −$408K
Exited to nil (held last quarter, gone now)
$KR ($1.25M last qtr)$FFIV ($952K last qtr)$ATO ($789K last qtr)$MA ($783K last qtr)$XLU ($582K last qtr)
Sector allocation (share of reported value)
each slice is a share of the reported long-US-equity value — smaller sectors and the rest of the book roll into “Other holdings”
Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.
Industry allocation (share of reported value)
- Technology Hardware, Storage & Peripherals9.4%—
- Semiconductors9.4%—
- Interactive Media & Services7.1%—
- Investment Banking & Brokerage6.1%—
- Asset Management & Custody Banks4.8%—
- Systems Software2.8%—
- Broadline Retail2.2%—
- Semiconductor Materials & Equipment1.4%—
- Other holdings56.8%—
the finer GICS cut of the same book — same denominator — smaller industries roll into “Other holdings”
Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.
Top S&P 500 holdings
9 of 9 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $AAPL | Apple Inc | 50.4K | $12.8M | +235 | 9.4% |
| $NVDA | NVIDIA Corporation | 48.4K | $8.44M | +62 | 6.2% |
| $SCHW | Charles Schwab Corporation | 216K | $8.2M | +42.2K | 6.1% |
| $BLK | BlackRock Inc | 57.5K | $4.23M | +9.95K | 3.1% |
| $GOOGL | Alphabet Inc | 14.3K | $4.1M | -6 | 3.0% |
| $MSFT | Microsoft Corporation | 10.2K | $3.76M | +382 | 2.8% |
| $GOOG | Alphabet Inc. Class C Capital Stock | 10.8K | $3.1M | -18 | 2.3% |
| $AMZN | Amazon.com Inc | 14.3K | $2.98M | -38 | 2.2% |
| $AVGO | Broadcom Inc | 8.27K | $2.56M | +80 | 1.9% |
…and 110 more holdings in the full 13F filing (top positions only shown).
SEC Form 13F data sets · public domain · 45-day filing lag · >$100M AUM managers · as reported
← All 13F filers·← QuantOrb.pro
How to read Δ QoQ — the five insight categories, and the caveats
The categories. Analysts, quants and retail traders look past total portfolio value to isolate actionable signals. Five categories matter.
Conviction & concentration shifts
New positions vs complete exits — a brand-new stock signals high conviction; a full liquidation suggests a broken thesis or tax-loss harvesting. Aggressive sizing — look at share count, not dollars: a 20% share increase during a drawdown is strong dip-buying. Concentration — a narrowing top-5/10 means conviction; spreading capital across more names means hedging.
Sector & macro allocation rotations
Aggregating Δ QoQ moves across sectors shows where smart money is leaning in or sneaking out — rotating out of growth into defensives or energy, for example. The fund's total long equity exposure quarter-over-quarter is a proxy for overall institutional risk appetite.
Crowding & smart-money consensus
When several managers initiate or expand the same stock in the same quarter, that is institutional consensus. Contrarian reads: top pickers buying hard into a beaten-down name the market is selling.
Derivative & option overlays
Reported call/put changes indicate whether managers are adding downside hedges or leveraging upside exposure. Note: a long increase may be half of a market-neutral pair trade.
Who reads this
| Retail "cloners" | High-conviction ideas to replicate ~45 days after quarter-end. |
| Corporate IR | Which funds bought or dumped the stock, before the next call. |
| Quant / algo traders | Cross-sectional factor inputs: flow, momentum, ownership. |
Four caveats before you trade on it
- 45-day lag — holdings are quarter-end; positions may already be closed.
- Long-only — 13Fs miss shorts, pair trades and cash.
- No non-US / fixed income — the picture is US equities plus options.
- Corporate actions — splits and spinoffs distort raw share deltas.
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