Marble Bar Asset Management LLP
SEC Form 13F institutional filer · CIK 0001346570
13F-HR · 9 reported holdings · 2026-03-31
Reported long-US-equity value
$0.07B
Top-10 concentration
100.0%
Marble Bar Asset Management LLP — $69.1M AUM allocation strategy
Marble Bar Asset Management LLP files SEC Form 13F and reports $69.1M of long US equity value across 9 reported holdings for 2026-03-31.
Its largest sector bet is Industrials 76.9%, followed by Communication Services 19.4% and Consumer Staples 2.1%.
The top 10 holdings account for 100% 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.
Marble Bar Asset Management LLP — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$69.1M
total across 9 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
100% of value
higher = narrower conviction; lower = spread / hedging
Exited to nil (held last quarter, gone now)
None this quarter
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)
- Rail Transportation76.9%—
- Broadcasting6.3%—
- Publishing6.2%—
- Wireless Telecommunication Services6.1%—
- Personal Care Products1.6%—
- Systems Software0.8%—
- Cable & Satellite0.8%—
- Electronic Manufacturing Services0.8%—
- Other holdings0.5%—
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 |
|---|---|---|---|---|---|
| $NSC | Norfolk Southern Corporation | 185K | $53.1M | — | 76.9% |
| $WBD | Warner Bros. Discovery Inc. Series A | 159K | $4.38M | +148K | 6.3% |
| $NWSA | News Corporation | 151K | $4.3M | — | 6.2% |
| $ECHO | EchoStar Corporation | 35.9K | $4.2M | — | 6.1% |
| $KVUE | Kenvue Inc | 62.8K | $1.08M | +26.4K | 1.6% |
| $NOW | ServiceNow Inc | 5.28K | $552K | — | 0.8% |
| $CHTR | Charter Communications Inc. Class A Common Stock New | 2.54K | $549K | — | 0.8% |
| $FLEX | Flex Ltd | 17.6K | $521K | — | 0.8% |
| $KHC | The Kraft Heinz Company | 17.8K | $401K | — | 0.6% |
SEC Form 13F data sets · public domain · 45-day filing lag · >$100M AUM managers · as reported
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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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