Stocks/Funds/CIK 1663900

Sunriver Management LLC

long-term holderconcentrated
Quarterly 13F filings · Latest period 2026-03-31 · CIK 1663900
Assets
$591M
-27.0% YoY
Holdings
18
Lifetime alpha vs market
-9.87% annual
Average hold time
2.4 yr
median 1.9 yr

Quarterly history

Cum return +0% vs S&P +52% · α -52% lifetimeAUM $591M · peak $954MFlow $-254M (-27%)2016-062017-122019-062020-122022-062023-122025-062026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
+2.96%
adds when stocks drop
when a holding falls −10%+
Middle response
+2.05%
steady accumulation
Rally response
-17.77%
trims into rallies
when a holding rises +10%+

Top positions · 18

Ticker$ value% portYoYHold time
ARMKAramark$57M9.6%+18.8%3.8 yr
SSNCSS&C Technologies Holdin$54M9.1%-18.0%6.3 yr
WCNWaste Connections, Inc.$52M8.9%-16.2%0.3 yr
OPLNOPENLANE, Inc.$44M7.5%+51.2%2.8 yr
VRRMVerra Mobility Corporati$42M7.1%-36.5%4.8 yr
FAFirst Advantage Corporat$36M6.0%-16.5%2.8 yr
CDWCDW Corporation$32M5.5%-23.2%1.5 yr
WEXWEX Inc.$31M5.3%-2.5%1.8 yr
HURNHuron Consulting Group I$30M5.0%-11.1%2.0 yr
PFGCPerformance Food Group C$30M5.0%+8.9%4.8 yr
LYVLive Nation Entertainmen$26M4.4%+16.8%0.5 yr
CBZCBIZ, Inc.$26M4.4%-64.6%0.8 yr
FISFidelity National Inform$26M4.4%-35.6%7.3 yr
TRUTransUnion$23M3.9%-16.1%0.5 yr
CAECAE Inc.$22M3.7%+5.9%0.3 yr

Portfolio composition (YoY)

Industry mix
Specialty Business Services20.0%+11.4pp$118M
Information Technology Services17.0%+1.6pp$100M
Software - Application9.1%-9.0pp$54M
Consulting Services8.9%+2.9pp$53M
Waste Management8.9%$52M
Auto - Dealerships7.5%+2.1pp$44M
Aerospace & Defense7.4%$44M
Software - Infrastructure5.3%-8.8pp$31M
Food Distribution5.0%-4.5pp$30M
Entertainment4.4%$26M
Country
US87.4%-0.8pp
CA12.6%
Top 5: 42.2% · Top 10: 69.0% · Top 25: 100.0%

Winners

TickerPrev $PnLYoY %
OPLN$44M+0.02B51.2%
PFGC$57M+0.01B8.9%
SWK$30M-0.00B-3.1%
WEX$49M-0.00B-2.5%
HURN$49M-0.01B-11.1%

Losers

TickerPrev $PnLYoY %
FIS$49M-0.02B-35.6%
VRRM$43M-0.02B-36.5%
FA$48M-0.01B-16.5%
HURN$49M-0.01B-11.1%
WEX$49M-0.00B-2.5%

Top buys this quarter · 9

WCN Waste Connections, Inc.new+$52M
CAE CAE Inc.new+$22M
BOBS Bob's Discount Furniture, Inc.new+$18M
CDW CDW Corporation+$12M
SSNC SS&C Technologies Holdings, In+$54M
FA First Advantage Corporation+$36M
LYV Live Nation Entertainment, Inc+$3M
ARMK Aramark+$2M
OPLN OPENLANE, Inc.+$44M

Top sells this quarter · 15

LMT Lockheed Martin Corporation$56M
RTO Rentokil Initial plcexit$53M
SYY Sysco Corporationexit$46M
HII Huntington Ingalls Industries,exit$44M
BOX Box, Inc.exit$41M
NABL N-able, Inc.exit$29M
IQV IQVIA Holdings Inc.exit$28M
WEX WEX Inc.$19M
TRU TransUnion$13M
ACVA ACV Auctions Inc.exit$13M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$591M18-2.73%+17.59%-20.32%-0.25B
2025-12-31$954M23+1.87%+17.72%-15.85%+0.03B
2025-09-30$920M21+1.58%+17.52%-15.94%-0.03B
2025-06-30$933M23+6.04%+14.94%-8.90%+0.07B
2025-03-31$810M22-5.05%+8.30%-13.36%+0.03B
2024-12-31$836M19+10.50%+24.89%-14.38%+0.02B
2024-09-30$813M17+22.12%+36.04%-13.91%-0.03B
2024-06-30$790M20+4.40%+24.49%-20.10%+0.06B
2024-03-31$765M20+15.84%+29.62%-13.78%+0.08B
2023-12-31$638M22+16.69%+26.18%-9.49%+0.05B
2023-09-30$529M19+14.44%+21.57%-7.13%+0.08B
2023-06-30$496M17+12.86%+19.42%-6.57%-0.01B
2023-03-31$479M17-6.13%-7.82%+1.69%-0.05B
2022-12-31$487M15+8.46%+7.56%+0.90%-0.14B
2022-09-30$581M17-9.96%-4.93%-5.03%+0.01B
2022-06-30$631M18-11.68%-16.11%+4.43%+0.07B