GENDELL JEFFREY L
SEC Form 13F institutional filer · CIK 0001056581
13F-HR · 19 reported holdings · 2026-03-31
Reported long-US-equity value
$0.84B
Top-10 concentration
82.3%
GENDELL JEFFREY L — $836M AUM allocation strategy
GENDELL JEFFREY L files SEC Form 13F and reports $836M of long US equity value across 19 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 49.9%, followed by Energy 12.5% and Industrials 5.6%.
The top 10 holdings account for 82% 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.
GENDELL JEFFREY L — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$836M
total across 19 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
82% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$BAX +1.12M sh · +$17.8M+$GLW +100K sh · +$28.2M+$AMD +95K sh · +$18.2M
Biggest trims (shares)
−$FLEX −276K sh · −$14.7M−$EQT −31.9K sh · +$1.5M−$SNDK −15.4K sh · +$56M
Exited to nil (held last quarter, gone now)
None this quarter
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)
- Technology Hardware, Storage & Peripherals20.0%—
- Semiconductors14.0%—
- Electronic Components12.8%—
- Oil & Gas Equipment & Services10.1%—
- Health Care Equipment3.1%—
- Electronic Manufacturing Services3.1%—
- Aerospace & Defense2.6%—
- Oil & Gas Exploration & Production2.4%—
- Other holdings31.9%—
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 |
|---|---|---|---|---|---|
| $SNDK | Sandisk Corporation | 150K | $95.3M | -15.4K | 11.4% |
| $GLW | Corning Incorporated | 401K | $54.5M | +100K | 6.5% |
| $WDC | Western Digital Corporation | 200K | $54.1M | -10.2K | 6.5% |
| $MU | Micron Technology Inc | 140K | $47.3M | -3.37K | 5.7% |
| $SLB | SLB Limited | 900K | $46.3M | +30K | 5.5% |
| $APH | Amphenol Corporation | 361K | $45.5M | — | 5.4% |
| $AMD | Advanced Micro Devices Inc | 200K | $40.7M | +95K | 4.9% |
| $HAL | Halliburton Company | 977K | $38.1M | +56.4K | 4.6% |
| $ON | ON Semiconductor Corporation | 470K | $29.1M | — | 3.5% |
…and 10 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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