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Oberndorf William E Holdings Report (Q2 2026) — 13F Stock Portfolio
Oberndorf William ECIK: 0001218663
Momentum followerSector-focusedQuality / disciplined sizing
Total reported value
$55.0M
Reporting period: 2026-06-30 · Number of holdings: 8
OBERNDORF WILLIAM E disclosed 8 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $55.0M and a quarterly turnover rate of 46.6%.
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Personality snowflake
- Concentration
- 67.21
- Portfolio Stability
- 46.64
- Momentum
- 100
- Sector conviction
- 98.78
- Diversification
- 16
- Sizing Uniformity
- 93.73
Oberndorf William E's disclosed holdings carry a Herfindahl concentration index of 0.168 — mathematically equivalent to about 6 equally-sized positions, close to its 8 actual disclosed holdings. Value is spread relatively evenly across the portfolio rather than concentrated in a handful of names.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 0.63), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
Recent activity leans toward adding more aggressively to already-large existing positions than to newly initiated ones (a 10.8 percentage-point tilt) — a pattern consistent with a momentum-following approach.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govTrim ADSK
-83.1% -$5.4M
Sold out TEAM
Add UNH
0.0% $5.2M
New buy GOOG
New buy MNDY
Trim PHYS
0.0% -$1.2M
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | UNH | Unitedhealth Group Inc | Stock-Healthcare | 26.86% | +8.83% | — | |
| 2 | GWRE | Guidewire Software Inc | Stock-Tech | 16.10% | -1.21% | +16.59% | |
| 3 | AMZN | Amazon.com Inc | Stock-Consumer Disc | 15.61% | +1.54% | — | |
| 4 | VEEV | Veeva Systems Inc-class A | Stock-Healthcare | 14.56% | -0.31% | — | |
| 5 | PHYS | Sprott Physical Gold Trust | Stock-Other | 12.31% | -2.60% | — | |
| 6 | GOOG | Alphabet Inc-cl C | Stock-Comm Services | 8.17% | +8.17% | NEW | |
| 7 | MNDY | monday.com Ltd. | Stock-Tech | 4.83% | +4.83% | NEW | |
| 8 | ADSK | Autodesk Inc | Stock-Tech | 1.56% | -10.21% | -83.12% |
Portfolio Performance
Performance for Q3 2026
+24%
Performance Last 4 Quarters
+13.4%
- Stdev
- +30.4%
- Beta
- +1.57
- Alpha
- -12.1%
- Max Drawdown
- -28.4%
- Annualized Perf
- +16.1%
- Batting Avg vs S&P
- +41.7%
- Sortino
- +1.22
- Stutzer
- +0.19
- Treynor
- +0.12
- Sterling
- +0.55
- Calmar
- +0.57
- Information Ratio
- -0.03
- Tracking Error
- +23.8%
- Stdev Down
- +15.8%
- Winning Months %
- +52.8%
- Losing Months %
- +47.2%
- Best 12 Months
- +42.2%
- Worst 12 Months
- -20%
- Efficiency Ratio
- +0.22
- Sharpe
- +0.64
- Stdev Sectors
- +14.1%
- Skewness
- +0.62
- Kurtosis
- -0.13
- Upside Potential
- +3.31
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q2 | 8 | $55.0M | 47 | ||
| 2026 Q1 | 7 | $53.3M | 71 | ||
| 2025 Q4 | 8 | $79.0M | 29 | ||
| 2025 Q3 | 8 | $74.2M | 66 | ||
| 2025 Q2 | 9 | $90.5M | 0 | ||
| 2025 Q1 | 9 | $77.9M | 100 | ||
| 2024 Q4 | 7 | $59.9M | 0 | ||
| 2024 Q3 | 9 | $75.4M | 0 | ||
| 2024 Q2 | 10 | $57.0M | 0 | ||
| 2024 Q1 | 10 | $61.3M | 0 | ||
| 2023 Q4 | 11 | $61.4M | 0 | ||
| 2023 Q3 | 10 | $54.7M | 0 | ||
| 2023 Q2 | 11 | $63.1M | 0 | ||
| 2023 Q1 | 11 | $49.5M | 0 | ||
| 2022 Q4 | 10 | $42.5M | 0 | ||
| 2022 Q3 | 8 | $46.5M | 0 | ||
| 2022 Q2 | 10 | $44.6M | 0 | ||
| 2022 Q1 | 7 | $65.6M | 0 | ||
| 2021 Q4 | 7 | $85.2M | 0 | ||
| 2021 Q3 | 7 | $128.1M | 0 | ||
| 2021 Q2 | 8 | $145.5M | 92 | ||
| 2021 Q1 | 8 | $124.7M | 64 | ||
| 2020 Q4 | 9 | $223.1M | 25 | ||
| 2020 Q3 | 8 | $181.5M | 31 | ||
| 2020 Q2 | 7 | $201.7M | 42 | ||
| 2020 Q1 | 7 | $141.8M | 44 | ||
| 2019 Q4 | 7 | $181.5M | 20 | ||
| 2019 Q3 | 8 | $185.5M | 23 | ||
| 2019 Q2 | 10 | $204.4M | 19 | ||
| 2019 Q1 | 8 | $183.3M | 44 | ||
| 2018 Q4 | 9 | $158.2M | 39 | ||
| 2018 Q3 | 9 | $173.3M | 36 | ||
| 2018 Q2 | 8 | $120.0M | 24 | ||
| 2018 Q1 | 9 | $107.7M | 16 | ||
| 2017 Q4 | 9 | $122.6M | 7 | ||
| 2017 Q3 | 9 | $127.2M | 30 | ||
| 2017 Q2 | 6 | $98.1M | 22 | ||
| 2017 Q1 | 7 | $89.4M | 33 | ||
| 2016 Q4 | 7 | $84.3M | 62 | ||
| 2016 Q3 | 6 | $51.1M | 43 | ||
| 2016 Q2 | 4 | $33.0M | 66 | ||
| 2016 Q1 | 5 | $41.8M | 29 | ||
| 2015 Q4 | 5 | $39.8M | 64 | ||
| 2015 Q3 | 5 | $31.3M | 46 | ||
| 2015 Q2 | 3 | $24.2M | 63 | ||
| 2015 Q1 | 3 | $17.9M | 5 | ||
| 2014 Q4 | 3 | $17.1M | 66 | ||
| 2014 Q3 | 4 | $18.2M | 23 | ||
| 2014 Q2 | 3 | $15.4M | 0 |
Holding changes this quarter
Oberndorf William E's most significant position changes for 2026-06-30: Sold out: Atlassian Corp-cl A (TEAM); New buy: Alphabet Inc-cl C (GOOG); New buy: monday.com Ltd. (MNDY); Trim: Autodesk Inc (ADSK) — shares -83.12%; Add: Guidewire Software Inc (GWRE) — shares +16.59%.
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | UNH | Unitedhealth Group Inc | +8.8% | — | Unchanged |
| 2 | GOOG | Alphabet Inc-cl C | +8.2% | NEW | New buy |
| 3 | MNDY | monday.com Ltd. | +4.8% | NEW | New buy |
| 4 | AMZN | Amazon.com Inc | +1.5% | — | Unchanged |
| 5 | VEEV | Veeva Systems Inc-class A | -0.3% | — | Unchanged |
| 6 | GWRE | Guidewire Software Inc | -1.2% | +16.59% | Add |
| 7 | PHYS | Sprott Physical Gold Trust | -2.6% | — | Unchanged |
| 8 | TEAM | Atlassian Corp-cl A | -9% | EXIT | Sold out |
| 9 | ADSK | Autodesk Inc | -10.2% | -83.12% | Trim |
Filing History
FAQ
What is Oberndorf William E and what type of investor is it?
Oberndorf William E 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 $55.0M, spread across 8 disclosed positions.
What are Oberndorf William E's largest equity positions?
Based on the latest 13F filing, Oberndorf William E's top holdings by market value are:
1. Unitedhealth Group Inc (UNH) — $14.8M (26.9%)
2. Guidewire Software Inc (GWRE) — $8.9M (16.1%)
3. Amazon.com Inc (AMZN) — $8.6M (15.6%)
4. Veeva Systems Inc-class A (VEEV) — $8.0M (14.6%)
5. Sprott Physical Gold Trust (PHYS) — $6.8M (12.3%)
What changes did Oberndorf William E make in its most recent portfolio filing?
In the latest reported quarter, Oberndorf William E made 5 notable position adjustments: 2 new positions were initiated, 1 existing holdings were added to, 1 positions were partially reduced, and 1 were completely exited. The largest of these moves: Sold out: Atlassian Corp-cl A (TEAM); New buy: Alphabet Inc-cl C (GOOG); New buy: monday.com Ltd. (MNDY); Trim: Autodesk Inc (ADSK) — shares -83.12%; Add: Guidewire Software Inc (GWRE) — shares +16.59%
What sectors does Oberndorf William E focus on?
Oberndorf William E is concentrated in the following sectors based on its current disclosed equity portfolio:
• Health Care: 47.2%
• Information Technology: 25.7%
• Consumer Discretionary: 17.8%
• Communication Services: 9.3%
Investment Profile
Oberndorf William E returned an annualized 16.1% over the trailing 36 months — underperforming the S&P 500 by 12.1 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 1.57 (more volatile than the market) and a 42% quarterly batting average against the index.
Its portfolio is concentrated and moderately active, with 47.2% of the portfolio concentrated in Health Care.
Its turnover score has risen from 0 to 47 over the past 4 quarters — a shift toward more active trading.
It has added to its VEEV position over the past two quarters (+$1.4M, now $8.0M), while trimming ADSK over the same stretch (-$11.6M, still holding $860.3K).
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Developer Access
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