J. Stern & Co. LLP
SEC Form 13F institutional filer · CIK 0002011335
13F-HR · 44 reported holdings · 2026-03-31
J. Stern & Co. LLP is a London-based investment firm.
Reported long-US-equity value
$1.03B
Top-10 concentration
67.2%
J. Stern & Co. LLP — $1.03B AUM allocation strategy
J. Stern & Co. LLP files SEC Form 13F and reports $1.03B of long US equity value across 44 reported holdings for 2026-03-31.
Its largest sector bet is Industrials 24.0%, followed by Information Technology 20.0% and Communication Services 18.0%.
The top 10 holdings account for 67% 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.
J. Stern & Co. LLP — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$1.03B
total across 44 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
67% of value
higher = narrower conviction; lower = spread / hedging
Biggest trims (shares)
−$NVDA −125M sh · −$144M−$GOOGL −112M sh · −$133M−$AMZN −87.6M sh · −$103M
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 & Services14.8%—
- Semiconductors10.5%—
- Broadline Retail7.0%—
- Industrial Machinery & Supplies & Components6.3%—
- Electronic Components6.1%—
- Industrial Conglomerates6.0%—
- Electrical Components & Equipment6.0%—
- Transaction & Payment Processing Services5.8%—
- Other holdings37.5%—
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 |
|---|---|---|---|---|---|
| $NVDA | NVIDIA Corporation | 619K | $108M | -125M | 10.5% |
| $GOOGL | Alphabet Inc | 318K | $91.1M | -112M | 8.9% |
| $AMZN | Amazon.com Inc | 348K | $72.6M | -87.6M | 7.1% |
| $APH | Amphenol Corporation | 499K | $63.1M | -76.3M | 6.1% |
| $HON | Honeywell International Inc | 275K | $62.2M | -52.9M | 6.0% |
| $ETN | Eaton Corporation PLC | 172K | $61.4M | -58.9M | 6.0% |
| $META | Meta Platforms Inc | 107K | $61.4M | -69.5M | 6.0% |
| $MA | Mastercard Incorporated | 119K | $59.3M | -72.5M | 5.8% |
| $RTX | RTX Corporation | 302K | $58.3M | -62.1M | 5.7% |
| $ICE | Intercontinental Exchange Inc | 340K | $53.5M | -53.8M | 5.2% |
…and 34 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.