Stocks/Funds/CIK 1505183

Stockbridge Partners LLC

long-term holderconcentrated
Quarterly 13F filings · Latest period 2026-03-31 · CIK 1505183
Assets
$4.14B
-8.4% YoY
Holdings
16
Lifetime alpha vs market
+0.84% annual
Average hold time
3.4 yr
median 1.6 yr

Quarterly history

Cum return +57% vs S&P +52% · α +5% lifetimeAUM $4.1B · peak $5.2BFlow $-242M (-5%)2016-062017-122019-062020-122022-062023-122025-062026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
+2.39%
adds when stocks drop
when a holding falls −10%+
Middle response
-0.92%
baseline attrition
Rally response
-10.51%
trims into rallies
when a holding rises +10%+

Top positions · 16

Ticker$ value% portYoYHold time
TSMTaiwan Semiconductor Man$727M17.6%+105.6%1.3 yr
AMZNAmazon.com, Inc.$515M12.5%+9.5%9.8 yr
TDGTransDigm Group Incorpor$503M12.2%-10.5%10.5 yr
WCNWaste Connections, Inc.$398M9.6%-16.2%2.5 yr
DEDeere & Company$318M7.7%+21.2%2.0 yr
VMCVulcan Materials Company$311M7.5%+17.5%6.0 yr
GOOGLAlphabet Inc.$281M6.8%0.5 yr
NVDANVIDIA Corporation$267M6.5%+60.9%0.3 yr
KLACKLA Corporation$196M4.7%+118.2%0.8 yr
MSFTMicrosoft Corporation$195M4.7%-0.6%5.5 yr
ALSNAllison Transmission Hol$121M2.9%+23.8%0.3 yr
MAMastercard Incorporated$103M2.5%-8.5%0.3 yr
VVisa Inc.$102M2.5%-13.1%6.8 yr
$62M1.5%0.3 yr
GWREGuidewire Software, Inc.$20M0.5%-20.2%8.0 yr

Portfolio composition (YoY)

Industry mix
Semiconductors28.8%+25.3pp$1.19B
Specialty Retail12.5%+0.4pp$515M
Aerospace & Defense12.2%-5.5pp$503M
Waste Management9.6%+0.4pp$398M
Construction Materials8.0%+0.8pp$330M
Agricultural - Machinery7.7%-1.5pp$318M
Internet Content & Information6.8%$281M
Financial - Credit Services4.9%$205M
Software - Infrastructure4.7%-4.1pp$195M
Auto - Parts2.9%$121M
Country
US71.3%-16.1pp
TW17.6%+14.1pp
CA9.6%+0.4pp
Unknown1.5%
Top 5: 59.5% · Top 10: 89.7% · Top 25: 100.0%

Winners

TickerPrev $PnLYoY %
TSM$156M+0.16B105.6%
DE$415M+0.09B21.2%
VMC$326M+0.06B17.5%
AMZN$545M+0.05B9.5%
MSFT$398M-0.00B-0.6%

Losers

TickerPrev $PnLYoY %
TDG$800M-0.08B-10.5%
WCN$414M-0.07B-16.2%
GWRE$328M-0.07B-20.2%
MSFT$398M-0.00B-0.6%

Top buys this quarter · 10

NVDA NVIDIA Corporationnew+$267M
ALSN Allison Transmission Holdings,new+$121M
AMZN Amazon.com, Inc.+$104M
MA Mastercard Incorporatednew+$103M
MLM Martin Marietta Materials, Incnew+$19M
WCN Waste Connections, Inc.+$398M
TSM Taiwan Semiconductor Manufactu+$10M
TDG TransDigm Group Incorporated+$503M
GOOGL Alphabet Inc.+$281M
new+$0M

Top sells this quarter · 9

VEEV Veeva Systems Inc.exit$229M
NOW ServiceNow, Inc.exit$198M
GWRE Guidewire Software, Inc.$196M
DE Deere & Company$120M
V Visa Inc.$103M
MSFT Microsoft Corporation$82M
VMC Vulcan Materials Company$48M
KLAC KLA Corporation$186M
exit$0M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$4.14B16+11.67%+17.59%-5.92%-0.24B
2025-12-31$4.54B13+15.87%+17.72%-1.85%-0.58B
2025-09-30$5.17B14+16.21%+17.52%-1.31%-0.11B
2025-06-30$5.11B12+20.65%+14.94%+5.71%-0.00B
2025-03-31$4.52B12+8.70%+8.30%+0.40%-0.20B
2024-12-31$4.71B12+20.41%+24.89%-4.48%-0.24B
2024-09-30$4.98B13+42.52%+36.04%+6.48%-0.20B
2024-06-30$4.84B13+31.31%+24.49%+6.82%-0.11B
2024-03-31$4.85B13+50.57%+29.62%+20.94%-0.33B
2023-12-31$4.68B14+59.42%+26.18%+33.24%-0.61B
2023-09-30$4.50B15+39.42%+21.57%+17.85%-0.34B
2023-06-30$4.90B15+21.70%+19.42%+2.28%-0.15B
2023-03-31$4.32B15-13.92%-7.82%-6.10%-0.06B
2022-12-31$3.73B14+2.91%+7.56%-4.65%+0.09B
2022-09-30$3.53B16-13.83%-4.93%-8.90%+0.24B
2022-06-30$3.82B17-17.28%-16.11%-1.17%-0.01B