CenterBook Partners LP
SEC Form 13F institutional filer · CIK 0001872738
13F-HR · 164 reported holdings · 2026-03-31
CenterBook Partners LP is a hedge fund.
Reported long-US-equity value
$0.74B
Top-10 concentration
39.8%
CenterBook Partners LP — $736M AUM allocation strategy
CenterBook Partners LP files SEC Form 13F and reports $736M of long US equity value across 164 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 25.6%, followed by Communication Services 11.7% and Financials 9.1%.
The top 10 holdings account for 40% of reported value — a broadly spread portfolio. 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.
CenterBook Partners LP — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$736M
total across 164 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
40% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$CCL +231K sh · +$5.66M+$NCLH +168K sh · +$2.78M+$BX +68K sh · +$7.72M
Biggest trims (shares)
−$NFLX −212K sh · −$19.9M−$UBER −146K sh · −$13.1M−$MOS −143K sh · −$3.41M
Exited to nil (held last quarter, gone now)
$WMT ($24M last qtr)$GE ($15.3M last qtr)$EME ($3.26M last qtr)$BLDR ($3.25M last qtr)$ACN ($3.21M 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)
- Interactive Media & Services9.9%—
- Semiconductors8.8%—
- Systems Software5.3%—
- Broadline Retail5.1%—
- Semiconductor Materials & Equipment4.6%—
- Pharmaceuticals3.7%—
- Transaction & Payment Processing Services3.2%—
- Multi-Sector Holdings3.2%—
- Other holdings56.4%—
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 |
|---|---|---|---|---|---|
| $MSFT | Microsoft Corporation | 105K | $38.9M | +7.06K | 5.3% |
| $GOOG | Alphabet Inc. Class C Capital Stock | 130K | $37.4M | +21.1K | 5.1% |
| $AMZN | Amazon.com Inc | 178K | $37M | -21.2K | 5.0% |
| $META | Meta Platforms Inc | 61.7K | $35.3M | +5.38K | 4.8% |
| $LLY | Eli Lilly and Company | 29.3K | $26.9M | +4.79K | 3.7% |
| $NVDA | NVIDIA Corporation | 150K | $26.1M | +17.2K | 3.5% |
| $V | Visa Inc | 79.1K | $23.9M | -6.54K | 3.2% |
| $BRK.B | Berkshire Hathaway Inc.-Class B | 49.1K | $23.5M | +748 | 3.2% |
| $AAPL | Apple Inc | 88.5K | $22.4M | +2.06K | 3.1% |
| $AMAT | Applied Materials Inc | 62.9K | $21.5M | +26.3K | 2.9% |
…and 154 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.
Newsletter signup
Free subscription. Daily trading day morning dispatch. No spam.