Skip to content
Disclosery

Sunriver Management LLC

Follow

13F filer, CIK 1663900, GREENWICH, CT

Sunriver Management LLC reported $591,346,268 across 18 holdings for the quarter ended 2026-03-31, in a 13F-HR filed 2026-05-14. Its ten largest share positions make up 69% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001892688-26-000072

Period
2026-03-31
Reported value
$591M
Holdings
18
Top 10 weight
69%
New
4
Sold out
9

Largest buys vs the previous quarter

SecurityShares changeApprox. value
WCNnew+322,683$52.4M
FISnew+548,860$25.7M
CAEnew+844,393$22M
BOBSnew+1,517,451$17.8M
CDWadded+99,374$12M

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
LMTreduced-93,043-$56.2M
BOXexited-1,741,267-$52.1M
RTOexited-1,697,919-$50M
SYYexited-652,768-$48.1M
NABLexited-6,134,573-$45.9M

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, Q1 2026

Share positions as resolved from 13F-HR 0001892688-26-000072, largest first. % of portfolio is the value over $591,346,268, 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; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 1,238,712 shares; 2025Q3: 817,261 shares; 2025Q4: 1,351,397 shares; 2026Q1: 1,398,349 shares 1,398,349$56.7M9.59%+46,952Timeline
SSNCSS&C TECH HLDGSQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 624,955 shares; 2024Q4: 536,237 shares; 2025Q1: not reported; 2025Q2: 484,343 shares; 2025Q3: 507,017 shares; 2025Q4: 630,879 shares; 2026Q1: 797,849 shares 797,849$53.9M9.12%+166,970Timeline
WCNWASTE CONNECTIONS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: 322,683 shares 322,683$52.4M8.86%newTimeline
OPLNOPENLANE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 3,341,764 shares; 2024Q4: 2,665,054 shares; 2025Q1: 2,263,449 shares; 2025Q2: 2,266,701 shares; 2025Q3: 1,491,108 shares; 2025Q4: 1,498,562 shares; 2026Q1: 1,518,196 shares 1,518,196$44.3M7.48%+19,634Timeline
VRRMVERRA MOBILITY CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 1,385,585 shares; 2025Q1: 1,920,395 shares; 2025Q2: 2,064,798 shares; 2025Q3: 2,284,774 shares; 2025Q4: 2,956,976 shares; 2026Q1: 2,943,917 shares 2,943,917$42.1M7.11%-13,059Timeline
FAFIRST ADVANTAGE CORP NEWQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 1,976,637 shares; 2024Q4: 2,292,235 shares; 2025Q1: 3,420,507 shares; 2025Q2: 1,608,701 shares; 2025Q3: 2,350,614 shares; 2025Q4: 2,661,286 shares; 2026Q1: 3,032,711 shares 3,032,711$35.7M6.03%+371,425Timeline
CDWCDW CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 168,982 shares; 2026Q1: 268,356 shares 268,356$32.5M5.49%+99,374Timeline
WEXWEX INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 264,533 shares; 2024Q4: 178,579 shares; 2025Q1: 314,069 shares; 2025Q2: 340,956 shares; 2025Q3: 308,081 shares; 2025Q4: 329,177 shares; 2026Q1: 203,694 shares 203,694$31.2M5.27%-125,483Timeline
HURNHURON CONSULTING GROUP INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 439,629 shares; 2024Q4: 486,597 shares; 2025Q1: 341,908 shares; 2025Q2: 378,211 shares; 2025Q3: 451,985 shares; 2025Q4: 279,089 shares; 2026Q1: 233,820 shares 233,820$29.8M5.04%-45,269Timeline
PFGCPERFORMANCE FOOD GROUP COQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 931,885 shares; 2024Q4: 911,692 shares; 2025Q1: 727,716 shares; 2025Q2: 655,400 shares; 2025Q3: 463,141 shares; 2025Q4: 454,315 shares; 2026Q1: 345,211 shares 345,211$29.6M5%-109,104Timeline
LYVLIVE NATION ENTERTAINMENT INQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 150,000 shares; 2026Q1: 170,661 shares 170,661$26M4.4%+20,661Timeline
CBZCBIZ INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 596,762 shares; 2025Q4: 989,349 shares; 2026Q1: 968,631 shares 968,631$26M4.4%-20,718Timeline
FISFIDELITY NATL INFORMATION SVQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 405,777 shares; 2024Q4: 307,401 shares; 2025Q1: 653,399 shares; 2025Q2: 552,375 shares; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: 548,860 shares 548,860$25.7M4.35%newTimeline
TRUTRANSUNIONQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 517,921 shares; 2026Q1: 331,809 shares 331,809$23M3.88%-186,112Timeline
CAECAE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: 844,393 shares 844,393$22M3.72%newTimeline
LMTLOCKHEED MARTIN CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 129,313 shares; 2026Q1: 36,270 shares 36,270$21.9M3.71%-93,043Timeline
SWKSTANLEY BLACK & DECKER INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 354,527 shares; 2025Q1: 385,105 shares; 2025Q2: 141,964 shares; 2025Q3: 567,473 shares; 2025Q4: 433,673 shares; 2026Q1: 293,036 shares 293,036$20.8M3.52%-140,637Timeline
BOBSBOBS DISC FURNITURE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: 1,517,451 shares 1,517,451$17.8M3.02%newTimeline

Sold out in Q1 2026

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

SecurityShares beforeValue beforeType
BOXBOX INC1,741,267$52.1Mshares
RTORENTOKIL INITIAL PLC1,697,919$50Mshares
SYYSYSCO CORP652,768$48.1Mshares
NABLN-ABLE INC6,134,573$45.9Mshares
HIIHUNTINGTON INGALLS INDS INC115,217$39.2Mshares
IQVIQVIA HLDGS INC163,513$36.9Mshares
ACVAACV AUCTIONS INC2,963,578$23.8Mshares
RPAYREPAY HLDGS CORP4,361,524$15.9Mshares
CCCCCC INTELLIGENT SOLUTIONS HL2,000,000$15.9Mshares

How Q1 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 0001892688-26-000072 base2026-05-14acceptance time not in the bulk data set