First Business Financial Services, Inc. holds a focused book of 201 stocks worth $1.3B as of Q2 2026 (disclosed Jul 28, 2026, a ~45-day 13F lag). This quarter they opened Howmet Aerospace Inc and trimmed Vanguard Total Stock MKT ETF. Their largest long position is Vanguard Total Stock MKT ETF at 23% of the equity book. Cloning the disclosed picks since 2024 would be +26% (+14.5%/yr). That is a simulation of the disclosed long book, not audited returns.
The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This fund page is the Follow view. The Build view lets your agent pull holdings, quarter changes, overlap, and source filings through API or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/1521951/holdings"
Use Arkolith to show FIRST BUSINESS FINANCIAL SERVICES, INC.'s latest holdings, largest changes, and filing provenance.
Growth of $10,000 cloning First Business Financial Services, Inc.'s disclosed long 13F book, rebalanced on each filing date (so it reflects the ~45-day reporting lag, no look-ahead), total-return basis (dividends reinvested), derived from end-of-day prices. “Their reported book” values the same picks from quarter-end, before they were public. S&P 500 is SPY total return over the same window. Excludes shorts, cash, options and non-13F holdings. Not investment advice.
Top-heavy: focused book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
26% mapped to company sectors
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices, no cost basis
Bars show each stock's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Vanguard Total Stock Market ET Com | $294.1M | 794.9K | 22.8% | ▼−0.3% Reduced · −2K sh | |
| 2 | iShares Core MSCI EAFE ETF Com | $151.4M | 1.57M | 11.7% | ▲+0.7% Added · +12K sh | |
| 3 | iShares Russell 1000 Growth ET Com | $90.9M | 731.9K | 7.0% | ▲+299% Added · +549K sh | |
| 4 | iShares Core S&P Small-Cap ETF Com | $74.5M | 502.0K | 5.8% | ▲+0.2% Added · +1K sh | |
| 5 | iShares Russell 1000 Value ETF Com | $64.4M | 265.8K | 5.0% | ▼−0.1% Reduced · −371 sh | |
| 6 | iShares Core Dividend Growth Com | $63.6M | 839.1K | 4.9% | ▲+0.5% Added · +4K sh | |
| 7 | iShares Core S&P Mid-Cap ETF Com | $54.9M | 711.7K | 4.3% | ▲+0.6% Added · +4K sh | |
| 8 | iShares Core US Aggregate Bond Com | $38.5M | 388.6K | 3.0% | ▲+3.4% Added · +13K sh | |
| 9 | State Street SPDR S&P 500 ETF Com | $32.6M | 43.7K | 2.5% | ▼−0.1% Reduced · −70 sh | |
| 10 | First Business Financial Servi Com | $21.5M | 340.2K | 1.7% | ▼−5.8% Reduced · −21K sh | |
| 11 | Nvidia Corp Com | $20.5M | 102.5K | 1.6% | ▲+2.6% Added · +3K sh | |
| 12 | JPMorgan Ultra-Short Income ET Com | $18.4M | 363.8K | 1.4% | ▲+4.0% Added · +14K sh | |
| 13 | Apple Inc Com | $17.3M | 60.0K | 1.3% | ▲+0.8% Added · +485 sh | |
| 14 | Broadcom Inc Com | $15.6M | 41.2K | 1.2% | ▼−0.9% Reduced · −399 sh | |
| 15 | Alphabet Inc Cap Stk Cl A Com | $15.6M | 43.6K | 1.2% | ▲+3.4% Added · +1K sh | |
| 16 | Ciena Corp Com | $14.1M | 28.8K | 1.1% | ▼−4.1% Reduced · −1K sh | |
| 17 | Lam Research Corporation Com | $14.1M | 32.5K | 1.1% | ▲+5.4% Added · +2K sh | |
| 18 | JPMorgan Chase & Co Com | $11.8M | 36.1K | 0.9% | ▲+2.2% Added · +781 sh | |
| 19 | Arista Networks Inc Com | $11.7M | 68.8K | 0.9% | ▲+3.9% Added · +3K sh | |
| 20 | Quanta Services Inc Com | $11.2M | 15.6K | 0.9% | ▲+0.4% Added · +67 sh | |
| 21 | Lilly Eli Co Com | $8.0M | 6.6K | 0.6% | ▲+3.5% Added · +226 sh | |
| 22 | Vanguard Short-Term Inflation Com | $7.5M | 150.2K | 0.6% | ▲+13% Added · +17K sh | |
| 23 | iShares Edge MSCI USA Momentum Com | $7.0M | 20.3K | 0.5% | —Held | |
| 24 | Microsoft Corp Com | $7.0M | 18.6K | 0.5% | ▲+3.3% Added · +597 sh | |
| 25 | State Street Technology Select Com | $7.0M | 36.5K | 0.5% | —Held | |
| 26 | iShares S&P 500 Core Com | $6.5M | 8.6K | 0.5% | ▲+33% Added · +2K sh | |
| 27 | iShares National Muni Bond ETF Com | $5.9M | 54.7K | 0.5% | ▲+3.3% Added · +2K sh | |
| 28 | Citigroup Inc Com | $5.8M | 41.5K | 0.4% | ▲+3.5% Added · +1K sh | |
| 29 | Analog Devices Inc Com | $5.5M | 13.9K | 0.4% | ▲+3.7% Added · +500 sh | |
| 30 | Bank of America Corp Com | $4.6M | 80.0K | 0.4% | ▲+3.1% Added · +2K sh | |
| 31 | Nucor Corp Com | $4.6M | 20.5K | 0.4% | ▲+4.1% Added · +812 sh | |
| 32 | Cencora Inc Com | $4.5M | 16.0K | 0.4% | ▲+4.4% Added · +681 sh | |
| 33 | Berkshire Hathaway Inc Class A Com | $4.5M | 6 | 0.3% | —Held | |
| 34 | Costco Wholesale Corp Com | $4.4M | 4.7K | 0.3% | ▲+1.6% Added · +74 sh | |
| 35 | Exxon Mobil Corp Com | $4.2M | 30.8K | 0.3% | ▲+5.3% Added · +2K sh | |
| 36 | Texas Instruments Inc Com | $4.2M | 14.0K | 0.3% | ▲+2.7% Added · +373 sh | |
| 37 | General Dynamics Corp Com | $3.6M | 10.3K | 0.3% | ▲+4.5% Added · +439 sh | |
| 38 | Cisco Systems Inc Com | $3.6M | 31.0K | 0.3% | ▼~0% Reduced · −12 sh | |
| 39 | Return Stacked Global Stocks & Com | $3.6M | 118.1K | 0.3% | ▲+51% Added · +40K sh | |
| 40 | Equinix Inc Com | $3.6M | 3.4K | 0.3% | ▲+3.7% Added · +121 sh | |
| 41 | Expedia Group Inc New Com | $3.2M | 12.7K | 0.3% | ▲+3.8% Added · +468 sh | |
| 42 | Coca-Cola Co Com | $3.2M | 39.8K | 0.3% | ▲+2.6% Added · +1K sh | |
| 43 | Stryker Corp Com | $3.2M | 10.0K | 0.2% | ▲+3.7% Added · +360 sh | |
| 44 | Republic Services Inc Com | $3.1M | 14.5K | 0.2% | ▲+1.6% Added · +231 sh | |
| 45 | Prudential Financial Inc Com | $3.1M | 28.5K | 0.2% | ▲+1.8% Added · +494 sh | |
| 46 | Amazon.com Inc Com | $3.1M | 12.9K | 0.2% | ▲+4.2% Added · +521 sh | |
| 47 | TJX Companies Inc Com | $3.1M | 20.2K | 0.2% | ▲+3.5% Added · +688 sh | |
| 48 | Nextera Energy Inc Com | $3.0M | 34.7K | 0.2% | ▲+4.0% Added · +1K sh | |
| 49 | Toll Brothers Inc Com | $3.0M | 18.1K | 0.2% | ▲+6.5% Added · +1K sh | |
| 50 | T Mobile US Inc Com | $2.9M | 17.5K | 0.2% | ▲+3.4% Added · +569 sh |
As-of date vs the date the SEC received each filing
| Quarter | As of | Filed | Positions | Value | Form |
|---|---|---|---|---|---|
| Q2 2026 | Jun 30, 2026 | Jul 28, 2026 | 201 | $1.3B | 13F-HR |
| Q1 2026 | Mar 31, 2026 | May 1, 2026 | 192 | $1.1B | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Feb 6, 2026 | 168 | $1.1B | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Oct 30, 2025 | 185 | $1.1B | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Jul 31, 2025 | 185 | $1.1B | 13F-HR |
| Q1 2025 | Mar 31, 2025 | May 2, 2025 | 170 | $1.0B | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Feb 6, 2025 | 162 | $1.0B | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Nov 6, 2024 | 159 | $999.2M | 13F-HR |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly ~45 days after quarter-end. Public domain. The book and weighting are long equity only; disclosed put/call options are listed separately and excluded from those totals. The performance line is a simulation of the disclosed long book, not an audited return.