Howard Hughes Medical Institute
SEC Form 13F institutional filer · CIK 0000810386
13F-HR · 28 reported holdings · 2026-03-31
Reported long-US-equity value
$0.38B
Top-10 concentration
85.9%
Howard Hughes Medical Institute — $384M AUM allocation strategy
Howard Hughes Medical Institute files SEC Form 13F and reports $384M of long US equity value across 28 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 52.7%, followed by Communication Services 16.8% and Consumer Discretionary 11.2%.
The top 10 holdings account for 86% 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.
Howard Hughes Medical Institute — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$384M
total across 28 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
86% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$NVDA +317K sh · +$55.2M+$AAPL +196K sh · +$49.6M+$GOOG +142K sh · +$40.9M
Added from nil (new positions)
None this quarter
Exited to nil (held last quarter, gone now)
$GOOGL ($314K last qtr)$BRK.B ($199K last qtr)$JPM ($189K last qtr)$LLY ($184K last qtr)$V ($128K 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)
- Semiconductors23.2%—
- Interactive Media & Services15.3%—
- Technology Hardware, Storage & Peripherals13.1%—
- Systems Software9.9%—
- Broadline Retail7.2%—
- Automobile Manufacturers4.0%—
- Semiconductor Materials & Equipment2.7%—
- Application Software2.1%—
- Other holdings22.6%—
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 |
|---|---|---|---|---|---|
| $NVDA | NVIDIA Corporation | 322K | $56.2M | +317K | 14.6% |
| $AAPL | Apple Inc | 199K | $50.4M | +196K | 13.2% |
| $GOOG | Alphabet Inc. Class C Capital Stock | 144K | $41.3M | +142K | 10.8% |
| $MSFT | Microsoft Corporation | 102K | $37.9M | +101K | 9.9% |
| $AMZN | Amazon.com Inc | 133K | $27.7M | +131K | 7.2% |
| $AVGO | Broadcom Inc | 65K | $20.1M | +64K | 5.2% |
| $META | Meta Platforms Inc | 30.8K | $17.6M | +30.3K | 4.6% |
| $TSLA | Tesla Inc | 41.2K | $15.3M | +40.6K | 4.0% |
| $NFLX | Netflix Inc | 58.7K | $5.64M | +57.8K | 1.5% |
…and 19 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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