One Madison Group LLC
SEC Form 13F institutional filer · CIK 0001728278
13F-HR · 17 reported holdings · 2026-03-31
Reported long-US-equity value
$0.52B
Top-10 concentration
79.1%
One Madison Group LLC — $516M AUM allocation strategy
One Madison Group LLC files SEC Form 13F and reports $516M of long US equity value across 17 reported holdings for 2026-03-31.
Its largest sector bet is Industrials 29.0%, followed by Communication Services 22.7% and Consumer Discretionary 22.1%.
The top 10 holdings account for 79% of reported value — a conviction-weighted book concentrated in its best ideas. 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.
One Madison Group LLC — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$516M
total across 17 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
79% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$IBKR +79.4K sh · +$5.71M+$ORLY +60K sh · +$5.71M+$AMZN +36K sh · +$2.22M
Biggest trims (shares)
−$DDOG −39.1K sh · −$7.84M−$TTWO −29K sh · −$20M−$GE −7.47K sh · −$5.54M
Exited to nil (held last quarter, gone now)
$TDG ($25.3M last qtr)$BX ($20.8M last qtr)$MSFT ($20.1M 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)
- Broadline Retail10.9%—
- Construction Materials10.4%—
- Heavy Electrical Equipment10.1%—
- Interactive Media & Services9.7%—
- Interactive Home Entertainment8.2%—
- Aerospace & Defense7.3%—
- Hotels, Resorts & Cruise Lines7.2%—
- Building Products5.9%—
- Other holdings30.3%—
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
10 of 10 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $AMZN | Amazon.com Inc | 270K | $56.2M | +36K | 10.9% |
| $MLM | Martin Marietta Materials Inc | 91K | $53.6M | +26K | 10.4% |
| $GEV | GE Vernova Inc | 60K | $52.4M | -6K | 10.1% |
| $GOOGL | Alphabet Inc | 165K | $47.3M | +2K | 9.2% |
| $TTWO | Take-Two Interactive Software Inc | 214K | $42.3M | -29K | 8.2% |
| $GE | GE Aerospace | 134K | $37.9M | -7.47K | 7.3% |
| $HLT | Hilton Worldwide Holdings Inc | 123K | $37.4M | +13K | 7.2% |
| $UNP | Union Pacific Corporation | 119K | $28.8M | +18.7K | 5.6% |
| $NVDA | NVIDIA Corporation | 160K | $27.9M | — | 5.4% |
| $NFLX | Netflix Inc | 260K | $25M | +2K | 4.8% |
…and 7 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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