ISTHMUS PARTNERS, LLC
SEC Form 13F institutional filer · CIK 0001639666
13F-HR · 98 reported holdings · 2026-03-31
Reported long-US-equity value
$0.65B
Top-10 concentration
33.2%
ISTHMUS PARTNERS, LLC — $648M AUM allocation strategy
ISTHMUS PARTNERS, LLC files SEC Form 13F and reports $648M of long US equity value across 98 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 11.5%, followed by Financials 9.8% and Industrials 9.3%.
The top 10 holdings account for 33% 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.
ISTHMUS PARTNERS, LLC — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$648M
total across 98 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
33% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$IVV +544K sh · +$49.2M+$PYPL +42.5K sh · −$562K+$IT +32.7K sh · +$1.68M
Biggest trims (shares)
−$AMCR −1.64M sh · −$4.41M−$INTC −215K sh · −$7.72M−$CHRW −52.5K sh · −$8.04M
Exited to nil (held last quarter, gone now)
$ADBE ($3.57M last qtr)$EBAY ($794K last qtr)$HSIC ($266K last qtr)$NDAQ ($248K last qtr)$ULTA ($228K 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)
- Technology Hardware, Storage & Peripherals3.6%—
- Interactive Media & Services3.1%—
- Pharmaceuticals3.1%—
- Transaction & Payment Processing Services2.8%—
- Semiconductors2.8%—
- Systems Software2.7%—
- Asset Management & Custody Banks2.6%—
- Building Products2.5%—
- Other holdings76.8%—
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 |
|---|---|---|---|---|---|
| $AAPL | Apple Inc | 90.9K | $23.1M | -3.14K | 3.6% |
| $GOOG | Alphabet Inc. Class C Capital Stock | 70.2K | $20.2M | -10.3K | 3.1% |
| $JNJ | Johnson & Johnson | 81.6K | $20M | -16.3K | 3.1% |
| $V | Visa Inc | 61.2K | $18.5M | +16K | 2.9% |
| $AVGO | Broadcom Inc | 58.1K | $18M | +252 | 2.8% |
| $MSFT | Microsoft Corporation | 47.4K | $17.5M | +667 | 2.7% |
| $BNY | The Bank of New York Mellon Corporation | 143K | $17M | -20.6K | 2.6% |
| $TT | Trane Technologies plc | 39.2K | $16.3M | -3.7K | 2.5% |
| $AMAT | Applied Materials Inc | 45.6K | $15.6M | -26.4K | 2.4% |
…and 89 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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