First Business Financial Services, Inc.
SEC Form 13F institutional filer · CIK 0001521951
13F-HR · 132 reported holdings · 2026-03-31
Reported long-US-equity value
$1.05B
Top-10 concentration
81.5%
First Business Financial Services, Inc. — $1.05B AUM allocation strategy
First Business Financial Services, Inc. files SEC Form 13F and reports $1.05B of long US equity value across 132 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 7.5%, followed by Communication Services 1.1% and Health Care 1.0%.
The top 10 holdings account for 81% 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.
First Business Financial Services, Inc. — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$1.05B
total across 132 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
81% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$IVV +69.2K sh · +$11.2M+$VTI +8.29K sh · −$8.75M+$GS +8.15K sh · +$393K
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)
- Semiconductors2.9%—
- Communications Equipment1.9%—
- Technology Hardware, Storage & Peripherals1.4%—
- Interactive Media & Services1.1%—
- Diversified Banks1.0%—
- Construction & Engineering0.8%—
- Systems Software0.6%—
- Semiconductor Materials & Equipment0.6%—
- Other holdings89.7%—
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
6 of 6 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $NVDA | NVIDIA Corporation | 100K | $17.4M | +5.45K | 1.7% |
| $AAPL | Apple Inc | 59.5K | $15.1M | +2.54K | 1.4% |
| $AVGO | Broadcom Inc | 41.6K | $12.9M | +3.82K | 1.2% |
| $GOOG | Alphabet Inc. Class C Capital Stock | 42.2K | $12.1M | +3.18K | 1.2% |
| $CIEN | Ciena Corporation | 30.1K | $11.7M | +3.31K | 1.1% |
| $JPM | JP Morgan Chase & Co | 35.3K | $10.4M | +3.23K | 1.0% |
…and 126 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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