Sunriver Management LLC 13F Portfolio

CIK 1663900 Filing since Q4 2015 Q2 2026 filed Aug 13, 2026
Holdings as of Jun 30, 2026, from the 13F filed Aug 13, 2026.

Portfolio Snapshot

21 positions · Q2 2026

Sunriver Management LLC reported 21 positions worth $636.84M for the quarter ended Jun 30, 2026, up 7.7% on the prior quarter. It opened 11 new positions, added to 6, trimmed 4 and exited 8. Its largest holding is Aramark at 9.4% of the portfolio.

Portfolio Value
$636.84M
+7.7% QoQ · -22.0% YoY
Positions
21
11 new · 8 sold out
Top 10 Concentration
62.8%
of portfolio value
Largest Position
ARMK 9.4%
Aramark
Net Buying
-$1.85M
$287.68M bought · $289.53M sold
Turnover
46.8%
of the portfolio traded
Top Sector
Industrials
47.7% of value
Track Record
43
quarters on file since Q4 2015

Portfolio Value & Positions

Value Positions

Reported 13F market value at each quarter end. A change mixes trading with price moves in the positions held.

Sector Allocation

6 sectors
47.74%
Industrials

Quarterly Buying & Selling

Bought Sold

Dollar value of shares bought and sold each quarter, at that quarter’s price. It counts trading only, not price changes.

Position Changes

How many positions were opened, added to, trimmed or closed each quarter.

Sector Allocation Over Time

Share of reported value in each sector at every quarter end.

Largest Buys

Q2 2026
Holding Change Change % Trade Value Weight
DG Dollar General Corp +333.1K – $38.34M 6.02%
BKNG Booking Holdings Inc. +194.5K – $34.66M 5.44%
LII Lennox International Inc +59.0K – $33.81M 5.31%
CNM Core & Main, Inc. +620.0K – $29.92M 4.7%
GPC Genuine Parts Co +242.0K – $28.55M 4.48%
MGRC Mcgrath Rentcorp +198.7K – $24.05M 3.78%
NSP Insperity, Inc. +517.0K – $21.36M 3.35%
ROAD Construction Partners, Inc. +175.2K – $20.81M 3.27%
WAY Waystar Holding Corp. +855.0K – $17.55M 2.76%
SOLS Solstice Advanced Materials Inc. +196.9K – $17.44M 2.74%

Largest Sells

Q2 2026
Holding Change Change % Trade Value Weight
OPLN OPENLANE, Inc. -1.52M -100.0% $44.26M Exited
VRRM VERRA MOBILITY Corp -2.94M -100.0% $42.07M Exited
CDW CDW Corp -268.4K -100.0% $32.48M Exited
CBZ CBIZ, Inc. -968.6K -100.0% $26.01M Exited
FIS Fidelity National Information Services, Inc. -548.9K -100.0% $25.75M Exited
TRU TransUnion -331.8K -100.0% $22.96M Exited
LMT Lockheed Martin Corp -36.3K -100.0% $21.92M Exited
SWK Stanley Black & Decker, Inc. -293.0K -100.0% $20.82M Exited
FA First Advantage Corp -1.09M -36.0% $19.71M 5.5%
ARMK Aramark -341.9K -24.4% $19.45M 9.44%

New Positions

Q2 2026
Holding Shares Trade Value Weight
DG Dollar General Corp +333.1K $38.34M 6.02%
BKNG Booking Holdings Inc. +194.5K $34.66M 5.44%
LII Lennox International Inc +59.0K $33.81M 5.31%
CNM Core & Main, Inc. +620.0K $29.92M 4.7%
GPC Genuine Parts Co +242.0K $28.55M 4.48%
MGRC Mcgrath Rentcorp +198.7K $24.05M 3.78%
NSP Insperity, Inc. +517.0K $21.36M 3.35%
ROAD Construction Partners, Inc. +175.2K $20.81M 3.27%
WAY Waystar Holding Corp. +855.0K $17.55M 2.76%
SOLS Solstice Advanced Materials Inc. +196.9K $17.44M 2.74%

Closed Positions

Q2 2026
Holding Shares Sold Trade Value Prior Weight
OPLN OPENLANE, Inc. -1.52M $44.26M 7.48%
VRRM VERRA MOBILITY Corp -2.94M $42.07M 7.11%
CDW CDW Corp -268.4K $32.48M 5.49%
CBZ CBIZ, Inc. -968.6K $26.01M 4.4%
FIS Fidelity National Information Services, Inc. -548.9K $25.75M 4.35%
TRU TransUnion -331.8K $22.96M 3.88%
LMT Lockheed Martin Corp -36.3K $21.92M 3.71%
SWK Stanley Black & Decker, Inc. -293.0K $20.82M 3.52%
Holdings · Q2 2026

21 Positions

As ofJun 30, 2026
Value$636.84M
Top 1062.8%
Avg position$30.33M
# Activity
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Showing 1–15 of 21 positions 13F filings on SEC EDGAR

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About Sunriver Management LLC’s 13F Portfolio

What are Sunriver Management LLC’s largest holdings?

As of its Q2 2026 13F filing, Sunriver Management LLC’s five largest positions were Aramark (ARMK) at 9.4%, Waste Connections, Inc. (WCN) at 9.0%, SS&C Technologies Holdings Inc (SSNC) at 7.9%, Dollar General Corp (DG) at 6.0%, First Advantage Corp (FA) at 5.5% of the reported portfolio.

How much is Sunriver Management LLC’s portfolio worth?

Sunriver Management LLC reported a 13F portfolio worth $636.84M across 21 positions for Q2 2026. That is up 7.7% from the previous quarter.

What did Sunriver Management LLC buy in Q2 2026?

Its largest purchases by value were Dollar General Corp ($38.34M), Booking Holdings Inc. ($34.66M), Lennox International Inc ($33.81M). It opened 11 new positions.

What did Sunriver Management LLC sell in Q2 2026?

Its largest sales by value were OPENLANE, Inc. ($44.26M), VERRA MOBILITY Corp ($42.07M), CDW Corp ($32.48M). It exited 8 positions entirely.

Where does this data come from?

From the Form 13F-HR reports Sunriver Management LLC files with the SEC each quarter, within 45 days of quarter end. A 13F lists long positions in US-listed equities and options; it excludes short positions, cash, bonds and most non-US holdings.

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by reported 13F value

13F data reflects long positions in US-listed equities and options as reported to the SEC up to 45 days after quarter end. It excludes short positions, cash, bonds and most non-US securities, so it is not a complete picture of a manager’s assets.