SIRIOS CAPITAL MANAGEMENT L P
SEC Form 13F institutional filer · CIK 0001104883
13F-HR · 48 reported holdings · 2026-03-31
Reported long-US-equity value
$0.52B
Top-10 concentration
58.5%
SIRIOS CAPITAL MANAGEMENT L P — $522M AUM allocation strategy
SIRIOS CAPITAL MANAGEMENT L P files SEC Form 13F and reports $522M of long US equity value across 48 reported holdings for 2026-03-31.
Its largest sector bet is Industrials 33.0%, followed by Financials 9.7% and Consumer Discretionary 8.6%.
The top 10 holdings account for 59% 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.
SIRIOS CAPITAL MANAGEMENT L P — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$522M
total across 48 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
59% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$NKE +173K sh · +$8.99M+$BSX +172K sh · +$7.96M+$GOOG +50.7K sh · +$13.2M
Biggest trims (shares)
−$KKR −44.2K sh · −$5.98M−$MSFT −39.5K sh · −$21.7M−$ROP −38.7K sh · −$19.4M
Exited to nil (held last quarter, gone now)
$ABT ($11.3M last qtr)$TMUS ($2.75M last qtr)$SHW ($1.63M last qtr)$PG ($782K 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)
- Heavy Electrical Equipment20.5%—
- Interactive Media & Services8.5%—
- Health Care Equipment8.2%—
- Semiconductors7.3%—
- Diversified Banks7.1%—
- Broadline Retail6.7%—
- Rail Transportation3.1%—
- Cargo Ground Transportation3.0%—
- Other holdings35.5%—
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
10 of 10 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $GEV | GE Vernova Inc | 123K | $107M | -37.8K | 20.5% |
| $AMZN | Amazon.com Inc | 169K | $35.1M | +34.3K | 6.7% |
| $GOOG | Alphabet Inc. Class C Capital Stock | 106K | $30.5M | +50.7K | 5.8% |
| $DXCM | DexCom Inc | 428K | $26.9M | -2.61K | 5.2% |
| $WFC | Wells Fargo & Company | 325K | $25.9M | +830 | 5.0% |
| $AMD | Advanced Micro Devices Inc | 82.7K | $16.8M | +12.2K | 3.2% |
| $UNP | Union Pacific Corporation | 67.2K | $16.3M | -5.08K | 3.1% |
| $BSX | Boston Scientific Corporation | 258K | $16.2M | +172K | 3.1% |
| $ODFL | Old Dominion Freight Line Inc | 81.6K | $15.9M | -34.9K | 3.1% |
| $VST | Vistra Corp | 96.9K | $14.6M | +48.8K | 2.8% |
…and 38 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
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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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