WOODSTOCK CORP
SEC Form 13F institutional filer · CIK 0001008877
13F-HR · 116 reported holdings · 2026-03-31
SEC-registered institutional investment manager.
Reported long-US-equity value
$1.05B
Top-10 concentration
41.2%
WOODSTOCK CORP — $1.05B AUM allocation strategy
WOODSTOCK CORP files SEC Form 13F and reports $1.05B of long US equity value across 116 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 22.0%, followed by Health Care 10.3% and Communication Services 7.4%.
The top 10 holdings account for 41% 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.
WOODSTOCK CORP — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$1.05B
total across 116 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
41% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$APA +25.1K sh · +$6.96M+$FISV +14.6K sh · −$48.5K+$OXY +14.1K sh · +$1.13M
Biggest trims (shares)
−$NVDA −32.9K sh · −$12.8M−$FTNT −18.9K sh · −$957K−$VZ −13.5K sh · −$205K
Exited to nil (held last quarter, gone now)
$DHR ($314K last qtr)$ADBE ($311K last qtr)$CTSH ($302K last qtr)$XLF ($210K 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)
- Semiconductors9.1%—
- Systems Software7.4%—
- Interactive Media & Services7.4%—
- Automotive Retail4.9%—
- Technology Hardware, Storage & Peripherals4.0%—
- Consumer Staples Merchandise Retail3.7%—
- Health Care Equipment3.6%—
- Biotechnology3.4%—
- Other holdings56.5%—
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 | 546K | $95.3M | -32.9K | 9.1% |
| $MSFT | Microsoft Corporation | 158K | $58.6M | -158 | 5.6% |
| $ORLY | O'Reilly Automotive Inc | 556K | $51.4M | -1.74K | 4.9% |
| $GOOGL | Alphabet Inc | 158K | $45.4M | -2.27K | 4.3% |
| $AAPL | Apple Inc | 167K | $42.5M | -1.23K | 4.0% |
| $ISRG | Intuitive Surgical Inc | 81K | $37.4M | -1.28K | 3.6% |
| $GOOG | Alphabet Inc. Class C Capital Stock | 112K | $32.3M | -1.06K | 3.1% |
| $RTX | RTX Corporation | 145K | $28M | -3.56K | 2.7% |
| $COST | Costco Wholesale Corporation | 21.9K | $21.9M | -234 | 2.1% |
| $JPM | JP Morgan Chase & Co | 68.9K | $20.3M | -9 | 1.9% |
…and 106 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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