Stockbridge Partners LLC 13F: Quarter-over-Quarter Portfolio Changes
Stockbridge Partners LLC reported a disclosed portfolio value of approximately $4.1 billion in its latest SEC Form 13F-HR filing for Q1 2026, down 8.9% quarter on quarter. Over the quarter, the fund initiated 6 new positions, bought more shares in 5 holdings, trimmed 5 holdings, and exited 3 positions.
Stockbridge Partners LLC's top buy was a new stake in Nvidia Corporation Com (NVDA) , equal to 6.5% of the disclosed portfolio. Its top sell was Veeva Systems (VEEV) . The fund exited the position completely after it had accounted for 6.4% of the previous portfolio.
New PositionsQ1 2026
Securities disclosed for the first time in Q1 2026 that were not present in the prior 13F-HR filing.
| Company | Ticker | Initial Portfolio Weight | History |
|---|---|---|---|
| NVIDIA CORPORATION COM | NVDA | 6.5% | History → |
| ALLISON TRANSMISSION HLDGS I | ALSN | 2.9% | Holders → |
| MASTERCARD INCORPORATED | MA | 2.5% | Holders → |
| VISA | V | 2.5% | Holders → |
| LIBERTY MEDIA CORP DEL | FWONK | 1.5% | Holders → |
| MARTIN MARIETTA MATLS INC | MLM | 0.5% | Holders → |
Top BuysQ1 2026
The fund's top buys among existing positions in Q1 2026. Ranked by portfolio-weight impact, with the percentage of additional shares shown separately.
| Company | Ticker | Portfolio Weight Change | More Shares | History |
|---|---|---|---|---|
| AMAZON.COM | AMZN | +2.4% | +25.3% | History → |
| ALPHABET CL A | GOOGL | +0.4% | +5.5% | History → |
| WASTE CONNECTIONS INC | WCN | +0.5% | +3.5% | History → |
| TAIWAN SEMIC-ADR | TSM | +3.4% | +1.5% | History → |
| TRANSDIGM GROUP INC | TDG | +-0.6% | +0.0% | History → |
Top SellsQ1 2026
The fund's top sells among positions it retained in Q1 2026. Ranked by portfolio-weight impact. Full exits are listed separately.
| Company | Ticker | Portfolio Weight Change | Shares Sold | History |
|---|---|---|---|---|
| GUIDEWIRE SOFTWARE INC | GWRE | -5.9% | 90.6% | Holders → |
| MICROSOFT | MSFT | -3.3% | 29.8% | History → |
| DEERE & CO | DE | -0.3% | 27.4% | History → |
| VULCAN MATLS CO | VMC | -0.8% | 13.3% | History → |
| KLA | KLAC | 0.7% | 12.9% | History → |
Full ExitsQ1 2026
Positions present in the prior 13F-HR filing that no longer appear in Q1 2026.
| Company | Ticker | Last-Reported Portfolio Weight |
|---|---|---|
| VEEVA SYSTEMS | VEEV | 6.4% |
| SERVICENOW | NOW | 6.4% |
| KLARNA GROUP PLC | KLAR | 0.1% |
Net Portfolio Value ChangeQ1 2026
- $4.5BPrior quarter
- $4.1BCurrent quarter
- $-0.4BNet delta
- -8.9%% change
Methodology & FAQ
How Stockbridge Partners LLC Quarterly Changes Are Computed
All deltas are sourced from sequential SEC Form 13F-HR filings for Stockbridge Partners LLC: each row joins the most recent filing against the immediately preceding quarterly filing for the same fund. Share-count changes reflect reported trading activity, while portfolio weights can also move because of market price changes. Portfolio weights are normalized to exclude listed options for comparability. A complete description — including how confidential treatment filings are handled — is documented in the Methodology.
What stocks did Stockbridge Partners LLC buy in Q1 2026?
In Q1 2026, Stockbridge Partners LLC initiated 6 new positions (NVIDIA CORPORATION COM (NVDA), ALLISON TRANSMISSION HLDGS I (ALSN), MASTERCARD INCORPORATED (MA), VISA (V), LIBERTY MEDIA CORP DEL (FWONK), MARTIN MARIETTA MATLS INC (MLM)); bought more shares of AMAZON.COM (AMZN), ALPHABET CL A (GOOGL), WASTE CONNECTIONS INC (WCN), TAIWAN SEMIC-ADR (TSM), TRANSDIGM GROUP INC (TDG).
What stocks did Stockbridge Partners LLC sell in Q1 2026?
In Q1 2026, Stockbridge Partners LLC fully sold 3 positions (VEEVA SYSTEMS (VEEV), SERVICENOW (NOW), KLARNA GROUP PLC (KLAR)); reduced holdings in GUIDEWIRE SOFTWARE INC (GWRE), MICROSOFT (MSFT), DEERE & CO (DE), VULCAN MATLS CO (VMC), KLA (KLAC).
Which positions did Stockbridge Partners LLC initiate in Q1 2026?
Stockbridge Partners LLC established 6 new positions in Q1 2026: NVIDIA CORPORATION COM (NVDA, 6.5%), ALLISON TRANSMISSION HLDGS I (ALSN, 2.9%), MASTERCARD INCORPORATED (MA, 2.5%), VISA (V, 2.5%), LIBERTY MEDIA CORP DEL (FWONK, 1.5%), MARTIN MARIETTA MATLS INC (MLM, 0.5%).
Which existing positions saw the largest allocation increases for Stockbridge Partners LLC in Q1 2026?
Of 5 existing positions with share-count increases in Q1 2026, the largest were: AMAZON.COM (AMZN, +2.4% weight, +25.3% shares), ALPHABET CL A (GOOGL, +0.4% weight, +5.5% shares), WASTE CONNECTIONS INC (WCN, +0.5% weight, +3.5% shares), TAIWAN SEMIC-ADR (TSM, +3.4% weight, +1.5% shares), TRANSDIGM GROUP INC (TDG, +-0.6% weight, +0.0% shares).
Which positions did Stockbridge Partners LLC fully exit in Q1 2026?
Stockbridge Partners LLC fully exited 3 positions in Q1 2026: VEEVA SYSTEMS (VEEV, last-reported weight 6.4%), SERVICENOW (NOW, last-reported weight 6.4%), KLARNA GROUP PLC (KLAR, last-reported weight 0.1%).
Which existing positions saw the largest allocation reductions for Stockbridge Partners LLC in Q1 2026?
Of 5 existing positions with share-count reductions in Q1 2026, the largest were: GUIDEWIRE SOFTWARE INC (GWRE, -5.9% weight, -90.6% shares), MICROSOFT (MSFT, -3.3% weight, -29.8% shares), DEERE & CO (DE, -0.3% weight, -27.4% shares), VULCAN MATLS CO (VMC, -0.8% weight, -13.3% shares), KLA (KLAC, 0.7% weight, -12.9% shares).
Do quarter-over-quarter 13F allocation changes constitute explicit trading signals?
No. Quarter-over-quarter changes reflect a combination of active trading and market price movement. A weight increase can result from price appreciation alone, without the manager adding shares. Share-count delta is the cleaner indicator of explicit trading activity. All deltas on this page are sourced from sequential SEC Form 13F-HR filings.