Polymer Capital Management (US) LLC
SEC Form 13F institutional filer · CIK 0001973324
13F-HR · 313 reported holdings · 2026-03-31
Reported long-US-equity value
$0.40B
Top-10 concentration
27.2%
Polymer Capital Management (US) LLC — $397M AUM allocation strategy
Polymer Capital Management (US) LLC files SEC Form 13F and reports $397M of long US equity value across 313 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 24.3%, followed by Materials 4.5% and Utilities 3.9%.
The top 10 holdings account for 27% 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.
Polymer Capital Management (US) LLC — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$397M
total across 313 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
27% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$NVDA +71.4K sh · +$11.2M+$GLW +47K sh · +$7.08M+$AKAM +40.4K sh · +$2.21M
Biggest trims (shares)
−$CNP −85K sh · −$3.04M−$LYB −61.4K sh · −$2.47M−$VTRS −58.1K sh · −$688K
Exited to nil (held last quarter, gone now)
$NEE ($5.4M last qtr)$ETR ($5.32M last qtr)$PSA ($3.93M last qtr)$PPG ($3.45M last qtr)$GWW ($3.18M 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)
- Semiconductors14.7%—
- Communications Equipment5.4%—
- Specialty Chemicals2.6%—
- Multi-Utilities2.3%—
- Electronic Components2.1%—
- Interactive Media & Services1.7%—
- Electric Utilities1.6%—
- Electrical Components & Equipment1.4%—
- Other holdings68.3%—
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 |
|---|---|---|---|---|---|
| $NVDA | NVIDIA Corporation | 174K | $30.3M | +71.4K | 7.6% |
| $LITE | Lumentum Holdings Inc | 30.4K | $21.4M | -20.3K | 5.4% |
| $AVGO | Broadcom Inc | 37.2K | $11.5M | +35.5K | 2.9% |
| $GLW | Corning Incorporated | 61.2K | $8.32M | +47K | 2.1% |
| $GOOG | Alphabet Inc. Class C Capital Stock | 23.2K | $6.68M | +13.6K | 1.7% |
| $MU | Micron Technology Inc | 18.9K | $6.38M | -48.6K | 1.6% |
| $AEP | American Electric Power Company Inc | 48K | $6.29M | -2.03K | 1.6% |
| $MCHP | Microchip Technology Incorporated | 91.2K | $5.89M | -33.2K | 1.5% |
| $VRT | Vertiv Holdings LLC | 22.4K | $5.61M | -13.6K | 1.4% |
| $XEL | Xcel Energy Inc | 70K | $5.56M | -20K | 1.4% |
…and 303 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
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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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