SP
Stockbridge Partners LLC 13F Holdings Tracker (Q2 2026)
Stockbridge Partners LLCCIK: 0001505183
Momentum followerQuality / disciplined sizing
Total reported value
$4.8B
Reporting period: 2026-06-30 · Number of holdings: 17
Stockbridge Partners LLC disclosed 17 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $4.8B and a quarterly turnover rate of 45.1%.
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Personality snowflake
- Concentration
- 40.11
- Portfolio Stability
- 45.11
- Momentum
- 100
- Sector conviction
- 61.32
- Diversification
- 34
- Sizing Uniformity
- 91.35
Stockbridge Partners LLC's disclosed holdings carry a Herfindahl concentration index of 0.100 — mathematically equivalent to about 10 equally-sized positions, well below its 17 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 0.87), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govAdd FWONK
+395.2% $281.7M
Trim WCN
-52.6% -$204.6M
Sold out KLAC
Sold out MSFT
Trim AMZN
-28.2% -$92.1M
Add TSM
-3.7% $262.8M
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 | TSM | Taiwan Semiconductor-sp Adr | Stock-Tech | 20.83% | +3.26% | -3.66% | |
| 2 | TDG | Transdigm Group Inc | Stock-Industrials | 12.17% | +0.01% | — | |
| 3 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 9.42% | +2.64% | +28.30% | |
| 4 | AMZN | Amazon.com Inc | Stock-Consumer Disc | 8.91% | -3.54% | -28.23% | |
| 5 | DE | Deere & Co | Stock-Industrials | 7.57% | -0.12% | +0.45% | |
| 6 | FWONK | Liberty Media Corp-formula-c | Stock-Comm Services | 7.23% | +5.73% | +395.22% | |
| 7 | VMC | Vulcan Materials Co | Stock-Materials | 6.62% | -0.89% | -6.63% | |
| 8 | NVDA | Nvidia CORP | Stock-Tech | 5.45% | -1.01% | -15.46% | |
| 9 | WCN | Waste Connections Inc | Stock-Industrials | 4.07% | -5.55% | -52.63% | |
| 10 | V | Visa Inc-class A Shares | Stock-Financials | 4.02% | +1.56% | +65.17% | |
| 11 | ALSN | Allison Transmission Holding | Stock-Consumer Disc | 3.56% | +0.65% | +45.57% | |
| 12 | MA | Mastercard Inc - A | Stock-Financials | 3.46% | +0.97% | +55.32% | |
| 13 | WWD | Woodward Inc | Stock-Industrials | 2.42% | +2.42% | NEW | |
| 14 | GWRE | Guidewire Software Inc | Stock-Tech | 1.97% | +1.48% | +456.92% | |
| 15 | VEEV | Veeva Systems Inc-class A | Stock-Healthcare | 1.51% | +1.51% | NEW | |
| 16 | MLM | Martin Marietta Materials | Stock-Materials | 0.52% | +0.06% | +31.78% | |
| 17 | TTAN | Servicetitan Inc-a | Stock-Tech | 0.28% | +0.28% | NEW |
Portfolio Performance
Performance for Q3 2026
+2.6%
Performance Last 4 Quarters
+10.3%
- Stdev
- +15.4%
- Beta
- +1.03
- Alpha
- -1.8%
- Max Drawdown
- -8.7%
- Annualized Perf
- +19.1%
- Batting Avg vs S&P
- +47.2%
- Sortino
- +2.41
- Stutzer
- +0.36
- Treynor
- +0.18
- Sterling
- +1.11
- Calmar
- +2.2
- Information Ratio
- -0.17
- Tracking Error
- +7.7%
- Stdev Down
- +7.8%
- Winning Months %
- +66.7%
- Losing Months %
- +33.3%
- Best 12 Months
- +45.4%
- Worst 12 Months
- +4.1%
- Efficiency Ratio
- +0.5
- Sharpe
- +1.22
- Stdev Sectors
- +9.4%
- Skewness
- +0.18
- Kurtosis
- -0.03
- Upside Potential
- +4.14
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q2 | 17 | $4.8B | 45 | ||
| 2026 Q1 | 16 | $4.1B | 47 | ||
| 2025 Q4 | 13 | $4.5B | 30 | ||
| 2025 Q3 | 14 | $5.2B | 36 | ||
| 2025 Q2 | 12 | $5.1B | 0 | ||
| 2025 Q1 | 12 | $4.5B | 100 | ||
| 2024 Q4 | 12 | $4.7B | 0 | ||
| 2024 Q3 | 13 | $5.0B | 0 | ||
| 2024 Q2 | 13 | $4.8B | 0 | ||
| 2024 Q1 | 13 | $4.9B | 0 | ||
| 2023 Q4 | 14 | $4.7B | 0 | ||
| 2023 Q3 | 15 | $4.5B | 0 | ||
| 2023 Q2 | 15 | $4.9B | 0 | ||
| 2023 Q1 | 15 | $4.3B | 0 | ||
| 2022 Q4 | 14 | $3.7B | 0 | ||
| 2022 Q3 | 16 | $3.5B | 0 | ||
| 2022 Q2 | 17 | $3.8B | 0 | ||
| 2022 Q1 | 17 | $4.6B | 0 | ||
| 2021 Q4 | 17 | $5.0B | 0 | ||
| 2021 Q3 | 19 | $4.9B | 0 | ||
| 2021 Q2 | 16 | $4.7B | 93 | ||
| 2021 Q1 | 15 | $4.1B | 100 | ||
| 2020 Q4 | 14 | $4.2B | 0 | ||
| 2020 Q3 | 11 | $3.6B | 27 | ||
| 2020 Q2 | 14 | $3.2B | 40 | ||
| 2020 Q1 | 15 | $2.5B | 41 | ||
| 2019 Q4 | 12 | $2.8B | 13 | ||
| 2019 Q3 | 10 | $2.5B | 21 | ||
| 2019 Q2 | 12 | $2.6B | 18 | ||
| 2019 Q1 | 14 | $2.7B | 27 | ||
| 2018 Q4 | 12 | $2.2B | 25 | ||
| 2018 Q3 | 15 | $2.5B | 15 | ||
| 2018 Q2 | 16 | $2.4B | 15 | ||
| 2018 Q1 | 16 | $2.3B | 26 | ||
| 2017 Q4 | 15 | $2.1B | 23 | ||
| 2017 Q3 | 14 | $2.0B | 26 | ||
| 2017 Q2 | 13 | $2.2B | 18 | ||
| 2017 Q1 | 13 | $2.1B | 36 | ||
| 2016 Q4 | 13 | $2.1B | 28 | ||
| 2016 Q3 | 15 | $2.1B | 23 | ||
| 2016 Q2 | 13 | $1.9B | 30 | ||
| 2016 Q1 | 14 | $1.9B | 15 | ||
| 2015 Q4 | 13 | $1.8B | 30 | ||
| 2015 Q3 | 17 | $1.8B | 23 | ||
| 2015 Q2 | 16 | $1.9B | 14 | ||
| 2015 Q1 | 15 | $1.9B | 38 | ||
| 2014 Q4 | 15 | $1.9B | 21 | ||
| 2014 Q3 | 15 | $1.8B | 34 | ||
| 2014 Q2 | 14 | $1.7B | 21 | ||
| 2014 Q1 | 15 | $1.5B | 52 | ||
| 2013 Q4 | 15 | $1.4B | 24 | ||
| 2013 Q3 | 14 | $1.2B | 28 | ||
| 2013 Q2 | 16 | $1.2B | 0 |
Holding changes this quarter
Stockbridge Partners LLC's most significant position changes for 2026-06-30: Sold out: Kla CORP (KLAC); Sold out: Microsoft CORP (MSFT); New buy: Woodward Inc (WWD); New buy: Veeva Systems Inc-class A (VEEV); New buy: Servicetitan Inc-a (TTAN).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | FWONK | Liberty Media Corp-formula-c | +5.7% | +395.22% | Add |
| 2 | TSM | Taiwan Semiconductor-sp Adr | +3.3% | -3.66% | Trim |
| 3 | GOOGL | Alphabet Inc-cl A | +2.6% | +28.30% | Add |
| 4 | WWD | Woodward Inc | +2.4% | NEW | New buy |
| 5 | V | Visa Inc-class A Shares | +1.6% | +65.17% | Add |
| 6 | VEEV | Veeva Systems Inc-class A | +1.5% | NEW | New buy |
| 7 | GWRE | Guidewire Software Inc | +1.5% | +456.92% | Add |
| 8 | MA | Mastercard Inc - A | +1% | +55.32% | Add |
| 9 | ALSN | Allison Transmission Holding | +0.7% | +45.57% | Add |
| 10 | TTAN | Servicetitan Inc-a | +0.3% | NEW | New buy |
| 11 | MLM | Martin Marietta Materials | +0.1% | +31.78% | Add |
| 12 | TDG | Transdigm Group Inc | 0% | — | Unchanged |
| 13 | DE | Deere & Co | -0.1% | +0.45% | Add |
| 14 | VMC | Vulcan Materials Co | -0.9% | -6.63% | Trim |
| 15 | NVDA | Nvidia CORP | -1% | -15.46% | Trim |
| 16 | AMZN | Amazon.com Inc | -3.5% | -28.23% | Trim |
| 17 | MSFT | Microsoft CORP | -4.7% | EXIT | Sold out |
| 18 | KLAC | Kla CORP | -4.7% | EXIT | Sold out |
| 19 | WCN | Waste Connections Inc | -5.6% | -52.63% | Trim |
* 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.
Filing History
FAQ
What is Stockbridge Partners LLC and what type of investor is it?
Stockbridge Partners LLC 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 $4.8B, spread across 17 disclosed positions.
What are Stockbridge Partners LLC's largest equity positions?
Based on the latest 13F filing, Stockbridge Partners LLC's top holdings by market value are:
1. Taiwan Semiconductor-sp Adr (TSM) — $990.0M (20.8%)
2. Transdigm Group Inc (TDG) — $578.5M (12.2%)
3. Alphabet Inc-cl A (GOOGL) — $447.7M (9.4%)
4. Amazon.com Inc (AMZN) — $423.3M (8.9%)
5. Deere & Co (DE) — $360.0M (7.6%)
What changes did Stockbridge Partners LLC make in its most recent portfolio filing?
In the latest reported quarter, Stockbridge Partners LLC made 18 notable position adjustments: 3 new positions were initiated, 8 existing holdings were added to, 5 positions were partially reduced, and 2 were completely exited. The largest of these moves: Sold out: Kla CORP (KLAC); Sold out: Microsoft CORP (MSFT); New buy: Woodward Inc (WWD); New buy: Veeva Systems Inc-class A (VEEV); New buy: Servicetitan Inc-a (TTAN)
What sectors does Stockbridge Partners LLC focus on?
Stockbridge Partners LLC is concentrated in the following sectors based on its current disclosed equity portfolio:
• Information Technology: 28.5%
• Industrials: 26.2%
• Communication Services: 16.6%
• Consumer Discretionary: 12.5%
• Financials: 7.5%
• Materials: 7.1%
Investment Profile
Stockbridge Partners LLC returned an annualized 19.1% over the trailing 36 months — underperforming the S&P 500 by 1.8 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 1.03 (roughly in line with the market) and a 47% quarterly batting average against the index.
Its portfolio is moderately concentrated and moderately active.
Its turnover score has risen from 0 to 45 over the past 4 quarters — a shift toward more active trading.
It has added to its TSM position over the past two quarters (+$345.4M, now $990.0M), while trimming WCN over the same stretch (-$221.6M, still holding $193.6M).
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Developer Access
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