NEEDHAM INVESTMENT MANAGEMENT LLC
SEC Form 13F institutional filer · CIK 0001167212
13F-HR · 46 reported holdings · 2026-03-31
Reported long-US-equity value
$0.37B
Top-10 concentration
66.5%
NEEDHAM INVESTMENT MANAGEMENT LLC — $369M AUM allocation strategy
NEEDHAM INVESTMENT MANAGEMENT LLC files SEC Form 13F and reports $369M of long US equity value across 46 reported holdings for 2026-03-31.
Its largest sector bet is Industrials 37.6%, followed by Information Technology 31.8% and Health Care 9.5%.
The top 10 holdings account for 66% 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.
NEEDHAM INVESTMENT MANAGEMENT LLC — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$369M
total across 46 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
66% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$SMCI +237K sh · −$3.58M+$CSGP +81.5K sh · +$1.66M+$J +38K sh · +$4.54M
Biggest trims (shares)
−$COHR −32K sh · −$247K−$DGX −3K sh · −$420K−$KLAC −2.75K sh · −$704K
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)
- Electrical Components & Equipment19.3%—
- Technology Hardware, Storage & Peripherals10.0%—
- Electronic Components8.4%—
- Semiconductor Materials & Equipment7.8%—
- Aerospace & Defense5.7%—
- Internet Services & Infrastructure5.6%—
- Health Care Services4.1%—
- Heavy Electrical Equipment3.8%—
- Other holdings35.3%—
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 |
|---|---|---|---|---|---|
| $VRT | Vertiv Holdings LLC | 285K | $71.5M | +0 | 19.4% |
| $SMCI | Super Micro Computer Inc | 1.62M | $36.8M | +237K | 10.0% |
| $COHR | Coherent Corp | 106K | $25.1M | -32K | 6.8% |
| $HII | Huntington Ingalls Industries Inc | 55.3K | $21M | +4.75K | 5.7% |
| $AKAM | Akamai Technologies Inc | 179K | $20.5M | +22K | 5.6% |
| $KLAC | KLA Corporation | 10.3K | $15.1M | -2.75K | 4.1% |
| $LH | Labcorp Holdings Inc | 56.3K | $15M | +0 | 4.1% |
| $GNRC | Generac Holdlings Inc | 72.5K | $14.2M | +38K | 3.8% |
| $WAB | Westinghouse Air Brake Technologies Corporation | 55.8K | $13.9M | +0 | 3.8% |
| $TMO | Thermo Fisher Scientific Inc | 25.3K | $12.4M | +0 | 3.4% |
…and 36 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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