Stockbridge Partners LLC
Long book
$4.14B
Q1 2026
Positions
16
Top-10 weight
90%
concentration
Last quarter
+17.7%
SPY +14.8%
Turnover
47%
of book per quarter
Strategy in plain words
auto-generated from filingsStockbridge Partners LLC is a concentrated fundamental stock-picker, running a $4.14B US long book across 16 positions.
The portfolio is extremely concentrated — the top 10 positions are almost the whole book. The portfolio is actively managed, with meaningful quarterly turnover. Current anchor positions: TAIWAN SEMICONDUCTOR-SP ADR, AMAZON.COM INC, TRANSDIGM GROUP INC, WASTE CONNECTIONS INC, DEERE & CO.
Over the last 9 quarters its long book ran on average 0.7pp per quarter behind the S&P 500, beating the index in 4 of 9 quarters. We rate its filings highest-signal: new buys here are worth attention.
Implied long-book return vs S&P 500
methodology: positions priced quarterly, no shorts/options Fund long book S&P 500
Q1 2024
+1.7%
Q2 2024
+7.9%
Q3 2024
-0.8%
Q4 2024
+0.5%
Q1 2025
+13.6%
Q2 2025
+2.2%
Q3 2025
-1.4%
Q4 2025
-6.9%
Q1 2026
+17.7%
Sector allocation
Industrials 28%
Technology 22%
Consumer discretionary 15%
Utilities 12%
Materials 10%
Services media 6%
Other 6%
Communications 2%
Long book by quarter
What does Stockbridge Partners own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| AMZN AMAZON.COM INC | Consumer discretionary | 2.5M | $515.5M | 12.5% | +25.3% |
| TDG TRANSDIGM GROUP INC | Industrials | 434.3K | $503.3M | 12.2% | 0.0% |
| WCN WASTE CONNECTIONS INC | Utilities | 2.5M | $398.2M | 9.6% | +3.5% |
| DE DEERE & CO | Industrials | 564.9K | $318.2M | 7.7% | -27.4% |
| VMC VULCAN MATERIALS CO | Materials | 1.1M | $310.9M | 7.5% | -13.3% |
| GOOGL ALPHABET INC-CL A | Technology | 976.5K | $280.8M | 6.8% | +5.5% |
| NVDA NVIDIA CORP | Technology | 1.5M | $267.2M | 6.5% | New |
| KLAC KLA CORP | Other | 133.3K | $196.2M | 4.7% | -12.9% |
| MSFT MICROSOFT CORP | Technology | 525.7K | $194.6M | 4.7% | -29.8% |
| ALSN ALLISON TRANSMISSION HOLDING | Industrials | 1.0M | $120.6M | 2.9% | New |
| MA MASTERCARD INC - A | Services media | 206.0K | $102.9M | 2.5% | New |
| V VISA INC-CLASS A SHARES | Services media | 337.3K | $101.9M | 2.5% | New |
| FWONK LIBERTY MEDIA CORP-FORMULA-C | Communications | 729.6K | $62.0M | 1.5% | New |
| GWRE GUIDEWIRE SOFTWARE INC | Technology | 136.4K | $20.4M | 0.5% | -90.6% |
| MLM MARTIN MARIETTA MATERIALS | Materials | 32.2K | $19.0M | 0.5% | New |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 15, 2026 | 16 | $4.14B | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Feb 17, 2026 | 13 | $4.54B | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Nov 14, 2025 | 14 | $5.17B | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 14, 2025 | 12 | $5.11B | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | May 15, 2025 | 12 | $4.52B | canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Feb 14, 2025 | 12 | $4.71B | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Nov 14, 2024 | 13 | $4.98B | canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Aug 14, 2024 | 13 | $4.84B | canonical | SEC ↗ |
| Q1 2024 | 13F-HR | May 15, 2024 | 13 | $4.85B | canonical | SEC ↗ |
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