13F GuideFiling Basics
What is SEC Form 13F? Ultimate Guide to Institutional Equity Filings
Learn how SEC Form 13F filings work, the $100M threshold, 45-day reporting lag, and how to track top hedge fund holdings.
AlphaSMO Research GuideRead Guide
CIK: 0001505183
Total reported value
$4.8B
$4.8B
16 檔
51.8%
During the Q1 2026 filing period, Stockbridge Partners LLC (CIK: 0001505183) submitted its Form 13F report to the U.S. SEC, disclosing a tracked public equity portfolio valued at $4.8B across 16 reported positions.
In Q1 2026, Stockbridge Partners LLC displayed an active expansion posture, initiating 6 new positions and adding to 5 existing holdings, outstripping position reductions.
In terms of portfolio concentration, the top 5 core holdings (including TSM, AMZN, TDG) accounted for 51.8% of total reported equity market value during Q1 2026.
Top New Position Initiated
NVDA
市值: $267.2M
Top Position Liquidated / Trimmed
VEEV
前期市值: $290.8M
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | TSM | Taiwan Semiconductor-sp Adr | Stock-Tech | 17.57% | +3.26% | +1.45% | |
| 2 | AMZN | Amazon.com Inc | Stock-Consumer Disc | 12.45% | -3.54% | +25.26% | |
| 3 | TDG | Transdigm Group Inc | Stock-Industrials | 12.16% | +0.01% | +0.00% | |
| 4 | WCN | Waste Connections Inc | Stock-Industrials | 9.62% | -5.55% | +3.54% | |
| 5 | DE | Deere & Co | Stock-Industrials | 7.69% | -0.12% | -27.40% | |
| 6 | VMC | Vulcan Materials Co | Stock-Materials | 7.51% | -0.89% | -13.32% | |
| 7 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 6.78% | +2.64% | +5.52% | |
| 8 | NVDA | Nvidia CORP | Stock-Tech | 6.46% | -1.01% | — | |
| 9 | KLAC | Kla CORP | Stock-Tech | 4.74% | -4.74% | EXIT | |
| 10 | MSFT | Microsoft CORP | Stock-Tech | 4.70% | -4.70% | EXIT | |
| 11 | ALSN | Allison Transmission Holding | Stock-Consumer Disc | 2.91% | +0.65% | — | |
| 12 | MA | Mastercard Inc - A | Stock-Financials | 2.49% | +0.97% | — | |
| 13 | V | Visa Inc-class A Shares | Stock-Financials | 2.46% | +1.56% | — | |
| 14 | FWONK | Liberty Media Corp-formula-c | Stock-Comm Services | 1.50% | +5.73% | — | |
| 15 | GWRE | Guidewire Software Inc | Stock-Tech | 0.49% | +1.48% | -90.56% | |
| 16 | MLM | Martin Marietta Materials | Stock-Materials | 0.46% | +0.06% | — |
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | TSM | Taiwan Semiconductor-sp Adr | +3.4% | +1.45% | Add |
| 2 | AMZN | Amazon.com Inc | +2.4% | +25.26% | Add |
| 3 | KLAC | Kla CORP | +0.7% | -12.87% | Trim |
| 4 | WCN | Waste Connections Inc | +0.5% | +3.54% | Add |
| 5 | GOOGL | Alphabet Inc-cl A | +0.4% | +5.52% | Add |
| 6 | DE | Deere & Co | -0.3% | -27.40% | Trim |
| 7 | TDG | Transdigm Group Inc | -0.6% | +0.00% | Add |
| 8 | VMC | Vulcan Materials Co | -0.8% | -13.32% | Trim |
| 9 | MSFT | Microsoft CORP | -3.3% | -29.77% | Trim |
| 10 | GWRE | Guidewire Software Inc | -5.9% | -90.56% | Trim |
| 11 | VEEV | Veeva Systems Inc-class A | — | EXIT | Sold out |
| 12 | NOW | Servicenow Inc | — | EXIT | Sold out |
| 13 | NVDA | Nvidia CORP | — | NEW | New buy |
| 14 | ALSN | Allison Transmission Holding | — | NEW | New buy |
| 15 | MA | Mastercard Inc - A | — | NEW | New buy |
| 16 | V | Visa Inc-class A Shares | — | NEW | New buy |
| 17 | FWONK | Liberty Media Corp-formula-c | — | NEW | New buy |
| 18 | MLM | Martin Marietta Materials | — | NEW | New buy |
| 19 | KLAR | Klarna Group plc | — | EXIT | Sold out |
According to official SEC Form 13F filings, Stockbridge Partners LLC reported a total U.S. public equity portfolio value of $4.8B across 16 disclosed positions in Q1 2026.
During Q1 2026, Stockbridge Partners LLC's top holdings by market value included TSM (17.6%)、AMZN (12.4%)、TDG (12.2%). The largest single position, TSM, represented 17.6% of total portfolio value.
In Q1 2026, Stockbridge Partners LLC made 19 total portfolio adjustments, initiating 6 new buys, adding to 5 positions, trimming 5 holdings, and fully liquidating 3 stocks.
All holding records on this page are fetched directly from the U.S. Securities and Exchange Commission (SEC) EDGAR system (Form 13F-HR). AlphaSMO parses CUSIP identifiers and formats data into Schema.org-compliant datasets.
Expert Analysis & Guides for Tracking Wall Street Smart Money Movements
Learn how SEC Form 13F filings work, the $100M threshold, 45-day reporting lag, and how to track top hedge fund holdings.
Understand SEC Form 4 insider disclosures for corporate officers, directors, and 10% owners to track executive transactions.
Understand Rule 144 restricted stock sale notices to spot planned insider liquidations before market sell pressure arrives.
Explore the 5% beneficial ownership threshold, 13D vs 13G filing differences, and recent SEC accelerated deadline rules.
Best practices for analyzing 13F quarterly changes without getting misled by stock splits, options, or market valuation drift.
Learn how AlphaSMO's flagship signal detects high-conviction stocks where 13F hedge funds and corporate insiders buy at the same time.