Marnell Management LLC
SEC Form 13F institutional filer · CIK 0001852314
13F-HR · 7 reported holdings · 2026-03-31
Reported long-US-equity value
$0.01B
Top-10 concentration
100.0%
Marnell Management LLC — $9.33M AUM allocation strategy
Marnell Management LLC files SEC Form 13F and reports $9.33M of long US equity value across 7 reported holdings for 2026-03-31.
Its largest sector bet is Materials 41.5%, followed by Consumer Discretionary 21.0% and Industrials 17.5%.
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.
Marnell Management LLC — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$9.33M
total across 7 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
100% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$LEN +19.5K sh · +$1.66M+$KKR +1.12K sh · −$215K+$SHW +472 sh · +$120K
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)
- Specialty Chemicals32.1%—
- Homebuilding21.0%—
- Building Products17.5%—
- Asset Management & Custody Banks10.1%—
- Construction Materials9.4%—
- Wireless Telecommunication Services6.2%—
- Multi-Sector Holdings3.6%—
- Other holdings0.1%—
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
7 of 7 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $SHW | Sherwin-Williams Company | 9.34K | $2.99M | +472 | 32.1% |
| $LEN | Lennar Corporation | 22.7K | $1.96M | +19.5K | 21.0% |
| $BLDR | Builders FirstSource Inc | 19.8K | $1.63M | — | 17.5% |
| $KKR | KKR & Co. Inc | 10.2K | $945K | +1.12K | 10.1% |
| $MLM | Martin Marietta Materials Inc | 1.49K | $878K | +196 | 9.4% |
| $ECHO | EchoStar Corporation | 4.95K | $579K | -3.65K | 6.2% |
| $BRK.B | Berkshire Hathaway Inc.-Class B | 710 | $340K | -80 | 3.6% |
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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