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Sunriver Management LLC

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13F filer, CIK 1663900, GREENWICH, CT

Sunriver Management LLC reported $636,837,478 across 21 holdings for the quarter ended 2026-06-30, in a 13F-HR filed 2026-08-13. Its ten largest share positions make up 62.84% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001892688-26-000115

Period
2026-06-30
Reported value
$637M
Holdings
21
Top 10 weight
62.84%
New
11
Sold out
8

Largest buys vs the previous quarter

SecurityShares changeApprox. value
DGnew+333,053$38.3M
BKNGnew+194,470$34.7M
LIInew+59,007$33.8M
CNMnew+620,017$29.9M
GPCnew+241,980$28.5M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
OPLNexited-1,518,196-$44.3M
VRRMexited-2,943,917-$42.1M
CDWexited-268,356-$32.5M
CBZexited-968,631-$26M
FISexited-548,860-$25.7M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q2 2026

Share positions as resolved from 13F-HR 0001892688-26-000115, largest first. % of portfolio is the value over $636,837,478, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
ARMKARAMARKQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: 1,398,349 shares; 2026Q2: 1,056,474 shares 1,056,474$60.1M9.44%-341,875Timeline
WCNWASTE CONNECTIONS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: 322,683 shares; 2026Q2: 343,513 shares 343,513$57.3M8.99%+20,830Timeline
SSNCSS&C TECH HLDGSQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: 797,849 shares; 2026Q2: 813,251 shares 813,251$50.5M7.92%+15,402Timeline
DGDOLLAR GEN CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: not reported; 2026Q2: 333,053 shares 333,053$38.3M6.02%newTimeline
FAFIRST ADVANTAGE CORP NEWQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: 3,032,711 shares; 2026Q2: 1,940,912 shares 1,940,912$35M5.5%-1,091,799Timeline
BKNGBOOKING HOLDINGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: not reported; 2026Q2: 194,470 shares 194,470$34.7M5.44%newTimeline
LIILENNOX INTL INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: not reported; 2026Q2: 59,007 shares 59,007$33.8M5.31%newTimeline
LYVLIVE NATION ENTERTAINMENT INQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: 170,661 shares; 2026Q2: 174,743 shares 174,743$32M5.02%+4,082Timeline
CNMCORE & MAIN INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: not reported; 2026Q2: 620,017 shares 620,017$29.9M4.7%newTimeline
WEXWEX INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: 203,694 shares; 2026Q2: 202,518 shares 202,518$28.6M4.49%-1,176Timeline
GPCGENUINE PARTS COQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: not reported; 2026Q2: 241,980 shares 241,980$28.5M4.48%newTimeline
BOBSBOBS DISC FURNITURE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: 1,517,451 shares; 2026Q2: 1,616,590 shares 1,616,590$25.6M4.02%+99,139Timeline
PFGCPERFORMANCE FOOD GROUP COQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: 345,211 shares; 2026Q2: 220,456 shares 220,456$24.6M3.87%-124,755Timeline
CAECAE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: 844,393 shares; 2026Q2: 979,193 shares 979,193$24.5M3.85%+134,800Timeline
MGRCMCGRATH RENTCORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: not reported; 2026Q2: 198,684 shares 198,684$24M3.78%newTimeline
NSPINSPERITY INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: not reported; 2026Q2: 516,995 shares 516,995$21.4M3.35%newTimeline
HURNHURON CONSULTING GROUP INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: 233,820 shares; 2026Q2: 235,663 shares 235,663$21.2M3.34%+1,843Timeline
ROADCONSTRUCTION PARTNERS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: not reported; 2026Q2: 175,223 shares 175,223$20.8M3.27%newTimeline
WAYWAYSTAR HLDG CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: not reported; 2026Q2: 855,000 shares 855,000$17.6M2.76%newTimeline
SOLSSOLSTICE ADVANCED MATLS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: not reported; 2026Q2: 196,879 shares 196,879$17.4M2.74%newTimeline
KFYKORN FERRYQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not loaded; 2026Q1: not reported; 2026Q2: 163,836 shares 163,836$10.9M1.71%newTimeline

Sold out in Q2 2026

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
OPLNOPENLANE INC1,518,196$44.3Mshares
VRRMVERRA MOBILITY CORP2,943,917$42.1Mshares
CDWCDW CORP268,356$32.5Mshares
CBZCBIZ INC968,631$26Mshares
FISFIDELITY NATL INFORMATION SV548,860$25.7Mshares
TRUTRANSUNION331,809$23Mshares
LMTLOCKHEED MARTIN CORP36,270$21.9Mshares
SWKSTANLEY BLACK & DECKER INC293,036$20.8Mshares

How Q2 2026 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0001892688-26-000115 base2026-08-13acceptance time not in the bulk data set

Filings

Every filing of this filer: 13F reports and notices, the 13D and 13G it filed or is a reporting person of, and Forms 3, 4 and 5 it reported as an owner.

FilingSubjectFiledAcceptedIngested
13F-HR 0001892688-26-000115 Quarter ended 2026-06-302026-08-13acceptance time not in the bulk data set
13F-HR 0001892688-26-000072 Quarter ended 2026-03-312026-05-14acceptance time not in the bulk data set
13F-HR 0001892688-26-000031 Quarter ended 2025-12-312026-02-13acceptance time not in the bulk data set
13F-HR 0001892688-25-000189 Quarter ended 2025-09-302025-11-13acceptance time not in the bulk data set