CSS LLC/IL
SEC Form 13F institutional filer · CIK 0001103646
13F-HR · 150 reported holdings · 2026-03-31
Reported long-US-equity value
$0.25B
Top-10 concentration
51.0%
CSS LLC/IL — $247M AUM allocation strategy
CSS LLC/IL files SEC Form 13F and reports $247M of long US equity value across 150 reported holdings for 2026-03-31.
Its largest sector bet is Financials 23.6%, followed by Information Technology 9.1% and Materials 7.3%.
The top 10 holdings account for 51% 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.
CSS LLC/IL — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$247M
total across 150 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
51% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$APO +265K sh · +$15.3M+$ALB +201K sh · +$15M+$HPE +102K sh · +$6.46M
Biggest trims (shares)
−$GEN −138K sh · −$1.32M−$IVZ −40K sh · +$1.14M−$VTRS −23.9K sh · −$288K
Exited to nil (held last quarter, gone now)
$SPY ($7.26M last qtr)$PSKY ($3.01M last qtr)$AXON ($2.87M last qtr)$HIG ($1.03M last qtr)$MO ($1.01M 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)
- Asset Management & Custody Banks17.1%—
- Technology Hardware, Storage & Peripherals7.8%—
- Specialty Chemicals7.3%—
- Retail REITs5.8%—
- Diversified Banks5.0%—
- Multi-Utilities1.8%—
- Oil & Gas Exploration & Production1.7%—
- Application Software1.3%—
- Other holdings52.3%—
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
9 of 9 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $IVZ | Invesco Ltd | 266K | $24.3M | -40K | 9.8% |
| $ALB | Albemarle Corporation | 250K | $17.9M | +201K | 7.3% |
| $APO | Apollo Global Management Inc | 277K | $16.3M | +265K | 6.6% |
| $KIM | Kimco Realty Corporation | 237K | $14.2M | +36.9K | 5.7% |
| $BAC | Bank of America Corporation | 10.3K | $12.3M | -13.3K | 5.0% |
| $HPE | Hewlett Packard Enterprise Company | 176K | $8.92M | +102K | 3.6% |
| $WDC | Western Digital Corporation | 25.4K | $6.88M | -14.4K | 2.8% |
| $ORCL | Oracle Corporation | 68.6K | $3.23M | — | 1.3% |
| $NEE | NextEra Energy Inc | 48.5K | $2.73M | +29.5K | 1.1% |
…and 141 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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