OS
Old Second National Bank Of Aurora 13F Holdings & Position Changes (Q2 2026)
Old Second National Bank Of AuroraCIK: 0000903783
Diversified strategyMomentum followerQuality / disciplined sizing
Total reported value
$530.5M
Reporting period: 2026-06-30 · Number of holdings: 387
OLD SECOND NATIONAL BANK OF AURORA disclosed 387 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $530.5M and a quarterly turnover rate of 19.5%.
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Personality snowflake
- Concentration
- 9.82
- Portfolio Stability
- 19.48
- Momentum
- 100
- Sector conviction
- 52.38
- Diversification
- 100
- Sizing Uniformity
- 75.97
Old Second National Bank Of Aurora's disclosed holdings carry a Herfindahl concentration index of 0.025 — mathematically equivalent to about 41 equally-sized positions, well below its 387 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 2.40), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 63% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govTrim FLIN
-99.8% -$10.7M
Add VWO
+4162.4% $10.7M
Add KLAC
+782.9% $6.5M
New buy BXSL
New buy ARCC
Trim ENB
-81.2% -$2.1M
Holdings Map
New buyAddUnchangedTrim
* This report is exclusively curated by the AlphaSMO team. AlphaSMO is the web's most authoritative 13F / Inside Trader database, delivering precise insider trading and institutional holdings insights.
Top 10 holdings by weight
Full holdings list this quarter
Showing top 200 holdings (of 387 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | MFSI | Mfs Active International | ETF-Other | 8.41% | -0.10% | -0.82% | |
| 2 | IJH | Ishares Core S&p Midcap ETF | ETF-Other | 6.05% | +0.12% | -2.12% | |
| 3 | NVDA | Nvidia CORP | Stock-Tech | 3.85% | +0.02% | -3.94% | |
| 4 | AVGO | Broadcom Inc | Stock-Tech | 3.56% | +0.12% | -6.90% | |
| 5 | AAPL | Apple Inc | Stock-Tech | 2.94% | +0.01% | -3.47% | |
| 6 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 2.94% | +0.15% | -7.00% | |
| 7 | BSCR | Invesco Bulletshares 2027 Cb | ETF-Other | 2.85% | -0.38% | -3.03% | |
| 8 | KLAC | Kla CORP | Stock-Tech | 2.75% | +1.08% | +782.91% | |
| 9 | MSFT | Microsoft CORP | Stock-Tech | 2.65% | -0.11% | +4.64% | |
| 10 | VGK | Vanguard Ftse Europe ETF | ETF-Other | 2.37% | -0.25% | -7.82% | |
| 11 | GLW | Corning Inc | Stock-Tech | 2.23% | +0.02% | -41.19% | |
| 12 | JPM | Jpmorgan Chase & Co | Stock-Financials | 2.19% | -0.02% | -2.72% | |
| 13 | MS | Morgan Stanley | Stock-Financials | 2.06% | +0.17% | -5.72% | |
| 14 | VWO | Vanguard Ftse Emerging Marke | ETF-Emerging Markets | 2.06% | +2.01% | +4162.39% | |
| 15 | CMI | Cummins Inc | Stock-Industrials | 2.01% | +0.16% | -9.87% | |
| 16 | LLY | Eli Lilly & Co | Stock-Healthcare | 1.93% | +0.24% | -4.03% | |
| 17 | VEA | Vanguard Ftse Developed ETF | ETF-Other | 1.85% | +0.08% | +3.45% | |
| 18 | SPY | Ss Spdr S&p 500 ETF Trust-us | ETF-Large Cap & Growth | 1.72% | +0.06% | -1.48% | |
| 19 | AMZN | Amazon.com Inc | Stock-Consumer Disc | 1.50% | +0.04% | -1.90% | |
| 20 | VT | Vanguard Tot World Stk ETF | ETF-Other | 1.41% | -0.01% | -4.23% | |
| 21 | PHM | Pultegroup Inc | Stock-Consumer Disc | 1.37% | +0.06% | -2.27% | |
| 22 | BLK | Blackrock Inc | Stock-Financials | 1.31% | -0.16% | -2.66% | |
| 23 | BSCS | Invesco Bulletshares 2028 Cb | ETF-Other | 1.31% | -0.13% | +0.01% | |
| 24 | JNJ | Johnson & Johnson | Stock-Healthcare | 1.30% | -0.14% | -4.29% | |
| 25 | SPYM | Ste Str Spdr Pt S&p 500 ETF | ETF-Large Cap & Growth | 1.22% | +0.17% | +10.28% | |
| 26 | BX | Blackstone Inc | Stock-Financials | 1.03% | +0.13% | +23.98% | |
| 27 | BSJR | Invesco Bulletshares 2027 Hy | ETF-Other | 1.00% | -0.20% | -9.19% | |
| 28 | VIK | Viking Holdings Ltd | Stock-Consumer Disc | 0.96% | +0.17% | -5.67% | |
| 29 | VLO | Valero Energy CORP | Stock-Energy | 0.95% | -0.12% | -7.92% | |
| 30 | ABBV | Abbvie Inc | Stock-Healthcare | 0.91% | +0.03% | -1.51% | |
| 31 | FITB | Fifth Third Bancorp | Stock-Financials | 0.87% | +0.08% | -0.48% | |
| 32 | EOG | Eog Resources Inc | Stock-Energy | 0.86% | +0.05% | +28.95% | |
| 33 | CVX | Chevron CORP | Stock-Energy | 0.85% | -0.06% | +27.46% | |
| 34 | MET | Metlife Inc | Stock-Financials | 0.83% | +0.07% | -1.09% | |
| 35 | SOFI | Sofi Technologies Inc | Stock-Financials | 0.81% | +0.24% | +38.87% | |
| 36 | ETN | Eaton Corporation plc | Stock-Industrials | 0.81% | +0.05% | -1.40% | |
| 37 | PEP | Pepsico Inc | Stock-Consumer Staples | 0.80% | -0.24% | -3.09% | |
| 38 | BXSL | Blackstone Secured Lending F | Stock-Financials | 0.78% | +0.78% | NEW | |
| 39 | ARCC | Ares Capital CORP | Stock-Financials | 0.78% | +0.78% | NEW | |
| 40 | COF | Capital One Financial CORP | Stock-Financials | 0.72% | +0.04% | +4.51% | |
| 41 | NOC | Northrop Grumman CORP | Stock-Industrials | 0.70% | -0.36% | -2.28% | |
| 42 | NEE | Nextera Energy Inc | Stock-Utilities | 0.70% | -0.06% | +6.96% | |
| 43 | PLD | Prologis Inc | Stock-Real Estate | 0.67% | -0.07% | -3.71% | |
| 44 | NSC | Norfolk Southern CORP | Stock-Industrials | 0.65% | -0.01% | -1.22% | |
| 45 | MA | Mastercard Inc - A | Stock-Financials | 0.62% | -0.03% | +2.12% | |
| 46 | CIBR | First Trust Nasdaq Cybersecu | ETF-Tech | 0.60% | +0.13% | -3.88% | |
| 47 | PG | Procter & Gamble Co/the | Stock-Consumer Staples | 0.55% | -0.04% | -0.11% | |
| 48 | UPS | United Parcel Service-cl B | Stock-Industrials | 0.54% | -0.01% | -0.16% | |
| 49 | WELL | Welltower Inc | Stock-Real Estate | 0.53% | -0.03% | -9.99% | |
| 50 | BMI | Badger Meter Inc | Stock-Tech | 0.52% | -0.02% | +8.22% |
1–50 of 200
Portfolio Performance
Performance for Q3 2026
+2.6%
Performance Last 4 Quarters
+18%
- Stdev
- +11.1%
- Beta
- +0.82
- Alpha
- +0.5%
- Max Drawdown
- -6.9%
- Annualized Perf
- +17.7%
- Batting Avg vs S&P
- +41.7%
- Sortino
- +3
- Stutzer
- +0.45
- Treynor
- +0.21
- Sterling
- +1.17
- Calmar
- +2.58
- Information Ratio
- -0.79
- Tracking Error
- +3.8%
- Stdev Down
- +5.7%
- Winning Months %
- +72.2%
- Losing Months %
- +27.8%
- Best 12 Months
- +30.7%
- Worst 12 Months
- +6.1%
- Efficiency Ratio
- +0.61
- Sharpe
- +1.54
- Stdev Sectors
- +8.7%
- Skewness
- -0.16
- Kurtosis
- -0.13
- Upside Potential
- +4.53
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q2 | 387 | $530.5M | 19 | ||
| 2026 Q1 | 391 | $483.9M | 21 | ||
| 2025 Q4 | 402 | $500.0M | 9 | ||
| 2025 Q3 | 401 | $485.4M | 30 | ||
| 2025 Q2 | 419 | $458.0M | 0 | ||
| 2025 Q1 | 431 | $424.7M | 100 | ||
| 2024 Q4 | 640 | $439.8M | 0 | ||
| 2024 Q3 | 457 | $414.2M | 0 | ||
| 2024 Q2 | 466 | $390.1M | 0 | ||
| 2024 Q1 | 455 | $384.9M | 0 | ||
| 2023 Q4 | 475 | $363.2M | 0 | ||
| 2023 Q3 | 480 | $328.7M | 0 | ||
| 2023 Q2 | 496 | $345.7M | 0 | ||
| 2023 Q1 | 505 | $342.9M | 0 | ||
| 2022 Q4 | 509 | $338.3M | 0 | ||
| 2022 Q3 | 491 | $325.2M | 0 | ||
| 2022 Q2 | 498 | $358.3M | 0 | ||
| 2022 Q1 | 499 | $398.3M | 0 | ||
| 2021 Q4 | 438 | $337.3M | 0 | ||
| 2021 Q3 | 540 | $370.7M | 0 | ||
| 2021 Q2 | 465 | $364.2M | 14 | ||
| 2021 Q1 | 453 | $358.7M | 19 | ||
| 2020 Q4 | 438 | $337.3M | 19 | ||
| 2020 Q3 | 477 | $304.4M | 23 | ||
| 2020 Q2 | 472 | $294.7M | 30 | ||
| 2020 Q1 | 468 | $252.1M | 40 | ||
| 2019 Q4 | 480 | $333.0M | 18 | ||
| 2019 Q3 | 476 | $298.4M | 23 | ||
| 2019 Q2 | 510 | $282.7M | 14 | ||
| 2019 Q1 | 536 | $279.3M | 20 | ||
| 2018 Q4 | 514 | $245.7M | 22 | ||
| 2018 Q3 | 527 | $274.2M | 13 | ||
| 2018 Q2 | 528 | $255.8M | 14 | ||
| 2018 Q1 | 500 | $250.4M | 16 | ||
| 2017 Q4 | 501 | $252.5M | 17 | ||
| 2017 Q3 | 505 | $240.3M | 13 | ||
| 2017 Q2 | 469 | $232.6M | 15 | ||
| 2017 Q1 | 468 | $223.7M | 22 | ||
| 2016 Q4 | 479 | $223.0M | 19 | ||
| 2016 Q3 | 474 | $217.9M | 10 | ||
| 2016 Q2 | 463 | $214.6M | 12 | ||
| 2016 Q1 | 474 | $208.4M | 21 | ||
| 2015 Q4 | 476 | $204.5M | 20 | ||
| 2015 Q3 | 473 | $198.9M | 16 | ||
| 2015 Q2 | 469 | $220.3M | 12 | ||
| 2015 Q1 | 489 | $225.4M | 18 | ||
| 2014 Q4 | 448 | $228.7M | 26 | ||
| 2014 Q3 | 369 | $204.1M | 49 | ||
| 2014 Q2 | 389 | $242.6M | 33 | ||
| 2014 Q1 | 371 | $197.6M | 33 | ||
| 2013 Q4 | 389 | $242.6M | 16 | ||
| 2013 Q3 | 378 | $220.2M | 12 | ||
| 2013 Q2 | 374 | $217.6M | 0 |
Holding changes this quarter
Old Second National Bank Of Aurora's most significant position changes for 2026-06-30: New buy: Blackstone Secured Lending F (BXSL); New buy: Ares Capital CORP (ARCC); Sold out: Pentair plc (PNR); New buy: Micron Technology Inc (MU); New buy: Oklo Inc (OKLO).
Showing top 200 changes by size (of 287 total)
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | VWO | Vanguard Ftse Emerging Marke | +2% | +4162.39% | Add |
| 2 | KLAC | Kla CORP | +1.1% | +782.91% | Add |
| 3 | BXSL | Blackstone Secured Lending F | +0.8% | NEW | New buy |
| 4 | ARCC | Ares Capital CORP | +0.8% | NEW | New buy |
| 5 | LLY | Eli Lilly & Co | +0.2% | -4.03% | Trim |
| 6 | SOFI | Sofi Technologies Inc | +0.2% | +38.87% | Add |
| 7 | SUB | Ishares Short-term National | +0.2% | +106.92% | Add |
| 8 | MS | Morgan Stanley | +0.2% | -5.72% | Trim |
| 9 | SPYM | Ste Str Spdr Pt S&p 500 ETF | +0.2% | +10.28% | Add |
| 10 | VIK | Viking Holdings Ltd | +0.2% | -5.67% | Trim |
| 11 | CMI | Cummins Inc | +0.2% | -9.87% | Trim |
| 12 | GOOGL | Alphabet Inc-cl A | +0.2% | -7.00% | Trim |
| 13 | BX | Blackstone Inc | +0.1% | +23.98% | Add |
| 14 | CIBR | First Trust Nasdaq Cybersecu | +0.1% | -3.88% | Trim |
| 15 | IJH | Ishares Core S&p Midcap ETF | +0.1% | -2.12% | Trim |
| 16 | AVGO | Broadcom Inc | +0.1% | -6.90% | Trim |
| 17 | ROP | Roper Technologies Inc | +0.1% | +49.92% | Add |
| 18 | VEA | Vanguard Ftse Developed ETF | +0.1% | +3.45% | Add |
| 19 | FITB | Fifth Third Bancorp | +0.1% | -0.48% | Trim |
| 20 | MET | Metlife Inc | +0.1% | -1.09% | Trim |
| 21 | QCOM | Qualcomm Inc | +0.1% | -7.85% | Trim |
| 22 | BSMR | Invesco Bulletshares 2027 Mb | +0.1% | +59.82% | Add |
| 23 | SPY | Ss Spdr S&p 500 ETF Trust-us | +0.1% | -1.48% | Trim |
| 24 | PHM | Pultegroup Inc | +0.1% | -2.27% | Trim |
| 25 | ETN | Eaton Corporation plc | +0.1% | -1.40% | Trim |
| 26 | EOG | Eog Resources Inc | +0.1% | +28.95% | Add |
| 27 | CAT | Caterpillar Inc | +0.1% | — | Unchanged |
| 28 | BSMS | Invesco Bulletshares 2028 Mb | +0.1% | +85.13% | Add |
| 29 | AMZN | Amazon.com Inc | 0% | -1.90% | Trim |
| 30 | COF | Capital One Financial CORP | 0% | +4.51% | Add |
| 31 | CSCO | Cisco Systems Inc | 0% | -0.79% | Trim |
| 32 | SPEM | State Street Sp Ptf Em ETF | 0% | +37.34% | Add |
| 33 | ABBV | Abbvie Inc | 0% | -1.51% | Trim |
| 34 | NVDA | Nvidia CORP | 0% | -3.94% | Trim |
| 35 | GLW | Corning Inc | 0% | -41.19% | Trim |
| 36 | IVV | Ishares Core S&p 500 ETF | 0% | -0.75% | Trim |
| 37 | GD | General Dynamics CORP | 0% | +80.42% | Add |
| 38 | INTC | Intel CORP | 0% | — | Unchanged |
| 39 | AAPL | Apple Inc | 0% | -3.47% | Trim |
| 40 | MDY | State Street Spdr S&p Midcap | 0% | -0.09% | Trim |
| 41 | SBUX | Starbucks CORP | 0% | -2.99% | Trim |
| 42 | DSI | Ishares Esg Msci Kld 400 ETF | 0% | — | Unchanged |
| 43 | IWM | Ishares Russell 2000 ETF | 0% | — | Unchanged |
| 44 | VOO | Vanguard S&p 500 ETF | 0% | — | Unchanged |
| 45 | IVW | Ishares S&p 500 Growth ETF | 0% | — | Unchanged |
| 46 | GEV | GE Vernova Inc | 0% | +7.35% | Add |
| 47 | JQUA | Jpmorgan US Quality Factor | 0% | — | Unchanged |
| 48 | GE | General Electric | 0% | +10.79% | Add |
| 49 | KO | Coca-cola Co/the | 0% | +22.28% | Add |
| 50 | TSM | Taiwan Semiconductor-sp Adr | 0% | — | Unchanged |
1–50 of 200
Filing History
FAQ
What is Old Second National Bank Of Aurora and what type of investor is it?
Old Second National Bank Of Aurora is an investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-06-30), the firm manages a tracked equity portfolio valued at approximately $530.5M, spread across 387 disclosed positions.
What are Old Second National Bank Of Aurora's largest equity positions?
Based on the latest 13F filing, Old Second National Bank Of Aurora's top holdings by market value are:
1. Mfs Active International (MFSI) — $44.6M (8.4%)
2. Ishares Core S&p Midcap ETF (IJH) — $32.1M (6.0%)
3. Nvidia CORP (NVDA) — $20.4M (3.9%)
4. Broadcom Inc (AVGO) — $18.9M (3.6%)
5. Apple Inc (AAPL) — $15.6M (2.9%)
What changes did Old Second National Bank Of Aurora make in its most recent portfolio filing?
In the latest reported quarter, Old Second National Bank Of Aurora made 141 notable position adjustments: 6 new positions were initiated, 35 existing holdings were added to, 90 positions were partially reduced, and 10 were completely exited. The largest of these moves: New buy: Blackstone Secured Lending F (BXSL); New buy: Ares Capital CORP (ARCC); Sold out: Pentair plc (PNR); New buy: Micron Technology Inc (MU); New buy: Oklo Inc (OKLO)
What sectors does Old Second National Bank Of Aurora focus on?
Old Second National Bank Of Aurora is concentrated in the following sectors based on its current disclosed equity portfolio:
• Information Technology: 31.6%
• Financials: 19.6%
• Health Care: 9.8%
• Industrials: 9.4%
• Consumer Discretionary: 9.2%
• Communication Services: 6.4%
Investment Profile
Old Second National Bank Of Aurora returned an annualized 17.7% over the trailing 36 months — outperforming the S&P 500 by 0.5 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 0.82 (less volatile than the market) and a 42% quarterly batting average against the index.
Its portfolio is broadly diversified and long-term-holding, with 31.6% of the portfolio concentrated in Information Technology.
Its turnover score has risen from 0 to 19 over the past 4 quarters — a shift toward more active trading.
It has added to its VWO position over the past two quarters (+$10.7M, now $10.9M), while trimming FLIN over the same stretch (-$12.4M, still holding $20.0K).
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Sector conviction49.3
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View detail
UF
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CIK 0001633716
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TC
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Developer Access
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