CIK: 0001663900
Total reported value
$591.3M
Reporting period: 2026-03-31 · Number of holdings: 18
Sunriver Management LLC disclosed 18 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $591.3M and a quarterly turnover rate of 82.9%.
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Sunriver Management LLC's disclosed holdings carry a Herfindahl concentration index of 0.063 — mathematically equivalent to about 16 equally-sized positions, close to its 18 actual disclosed holdings. Value is spread relatively evenly across the portfolio rather than concentrated in a handful of names.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 0.37), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 63% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Add ARMK
+3.5% $6.9M
Add SSNC
+26.5% -$1.2M
Add CDW
+58.8% $9.5M
Trim LMT
-72.0% -$40.6M
Add OPLN
+1.3% -$371.8K
Add LYV
+13.8% $4.7M
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | ARMK | Aramark | Stock-Industrials | 9.59% | +4.37% | +3.47% | |
| 2 | SSNC | Ss&c Technologies Holdings | Stock-Tech | 9.12% | +3.34% | +26.47% | |
| 3 | WCN | Waste Connections INC | Stock-Industrials | 8.86% | +8.86% | NEW | |
| 4 | OPLN | Openlane INC | Stock-Other | 7.48% | +2.80% | +1.31% | |
| 5 | VRRM | Verra Mobility CORP | Stock-Other | 7.11% | +0.16% | -0.44% | |
| 6 | FA | First Advantage CORP | Stock-Other | 6.03% | +1.98% | +13.96% | |
| 7 | CDW | Cdw Corp/de | Stock-Tech | 5.49% | +3.08% | +58.81% | |
| 8 | WEX | Wex INC | Stock-Tech | 5.27% | +0.13% | -38.12% | |
| 9 | HURN | Huron Consulting Group INC | Stock-Other | 5.04% | -0.02% | -16.22% | |
| 10 | PFGC | Performance Food Group Co | Stock-Consumer Staples | 5.00% | +0.72% | -24.02% | |
| 11 | LYV | Live Nation Entertainment In | Stock-Comm Services | 4.40% | +2.16% | +13.77% | |
| 12 | CBZ | Cbiz INC | Stock-Other | 4.40% | -0.83% | -2.09% | |
| 13 | FIS | Fidelity National Info Serv | Stock-Tech | 4.35% | +4.35% | NEW | |
| 14 | TRU | Transunion | Stock-Financials | 3.88% | -0.78% | -35.93% | |
| 15 | CAE | Cae INC | Stock-Other | 3.72% | +3.72% | NEW | |
| 16 | LMT | Lockheed Martin CORP | Stock-Industrials | 3.71% | -2.85% | -71.95% | |
| 17 | SWK | Stanley Black & Decker INC | Stock-Industrials | 3.52% | +0.14% | -32.43% | |
| 18 | BOBS | Bob's Discount Furniture | Stock-Other | 3.02% | +3.02% | NEW |
Performance for Q3 2026
+3.4%
Performance Last 4 Quarters
-7.2%
Based on 68% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 18 | $591.3M | 83 | |
| 2025-12-31 | 23 | $953.9M | 51 | |
| 2025-09-30 | 21 | $920.0M | 66 | |
| 2025-06-30 | 23 | $932.6M | 0 | |
| 2025-03-31 | 22 | $810.3M | 100 | |
| 2024-12-31 | 19 | $835.7M | 0 | |
| 2024-09-30 | 17 | $813.5M | 0 | |
| 2024-06-30 | 20 | $790.0M | 0 | |
| 2024-03-31 | 20 | $765.2M | 0 | |
| 2023-12-31 | 22 | $638.3M | 0 | |
| 2023-09-30 | 19 | $528.9M | 0 | |
| 2023-06-30 | 17 | $495.7M | 0 | |
| 2023-03-31 | 17 | $479.5M | 0 | |
| 2022-12-31 | 15 | $487.0M | 0 | |
| 2022-09-30 | 17 | $581.1M | 0 | |
| 2022-06-30 | 18 | $480.6M | 0 | |
| 2022-03-31 | 20 | $635.3M | 0 | |
| 2021-12-31 | 17 | $633.6M | 0 | |
| 2021-09-30 | 21 | $629.2M | 0 | |
| 2021-06-30 | 20 | $587.7M | 95 | |
| 2021-03-31 | 19 | $534.8M | 56 | |
| 2020-12-31 | 19 | $606.3M | 39 | |
| 2020-09-30 | 20 | $626.3M | 44 | |
| 2020-06-30 | 20 | $634.2M | 38 | |
| 2020-03-31 | 18 | $570.5M | 100 | |
| 2019-12-31 | 19 | $569.7M | 100 | |
| 2019-09-30 | 18 | $516.3M | 49 | |
| 2019-06-30 | 19 | $490.1M | 53 | |
| 2019-03-31 | 18 | $502.4M | 52 | |
| 2018-12-31 | 18 | $439.6M | 39 | |
| 2018-09-30 | 20 | $484.0M | 55 | |
| 2018-06-30 | 19 | $467.5M | 31 | |
| 2018-03-31 | 20 | $447.1M | 38 | |
| 2017-12-31 | 19 | $474.4M | 74 | |
| 2017-09-30 | 17 | $378.6M | 64 | |
| 2017-06-30 | 19 | $449.0M | 43 | |
| 2017-03-31 | 18 | $420.6M | 47 | |
| 2016-12-31 | 17 | $365.7M | 61 | |
| 2016-09-30 | 19 | $330.6M | 82 | |
| 2016-06-30 | 19 | $323.0M | 51 | |
| 2016-03-31 | 19 | $271.2M | 71 | |
| 2015-12-31 | 20 | $148.9M | 0 |
Sunriver Management LLC's most significant position changes for 2026-03-31: New buy: Waste Connections INC (WCN); Sold out: Box INC - Class A (BOX); Sold out: Rentokil Initial Plc-sp Adr (RTO); Sold out: Sysco CORP (SYY); Sold out: N-able INC (NABL).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | ARMK | Aramark | +4.4% | +3.47% | Add |
| 2 | SSNC | Ss&c Technologies Holdings | +3.3% | +26.47% | Add |
| 3 | CDW | Cdw Corp/de | +3.1% | +58.81% | Add |
| 4 | OPLN | Openlane INC | +2.8% | +1.31% | Add |
| 5 | LYV | Live Nation Entertainment In | +2.2% | +13.77% | Add |
| 6 | FA | First Advantage CORP | +2% | +13.96% | Add |
| 7 | PFGC | Performance Food Group Co | +0.7% | -24.02% | Trim |
| 8 | VRRM | Verra Mobility CORP | +0.2% | -0.44% | Trim |
| 9 | SWK | Stanley Black & Decker INC | +0.1% | -32.43% | Trim |
| 10 | WEX | Wex INC | +0.1% | -38.12% | Trim |
| 11 | HURN | Huron Consulting Group INC | 0% | -16.22% | Trim |
| 12 | TRU | Transunion | -0.8% | -35.93% | Trim |
| 13 | CBZ | Cbiz INC | -0.8% | -2.09% | Trim |
| 14 | LMT | Lockheed Martin CORP | -2.9% | -71.95% | Trim |
| 15 | WCN | Waste Connections INC | — | NEW | New buy |
| 16 | BOX | Box INC - Class A | — | EXIT | Sold out |
| 17 | RTO | Rentokil Initial Plc-sp Adr | — | EXIT | Sold out |
| 18 | SYY | Sysco CORP | — | EXIT | Sold out |
| 19 | NABL | N-able INC | — | EXIT | Sold out |
| 20 | HII | Huntington Ingalls Industrie | — | EXIT | Sold out |
| 21 | IQV | Iqvia Holdings INC | — | EXIT | Sold out |
| 22 | FIS | Fidelity National Info Serv | — | NEW | New buy |
| 23 | ACVA | Acv Auctions Inc-a | — | EXIT | Sold out |
| 24 | CAE | Cae INC | — | NEW | New buy |
| 25 | BOBS | Bob's Discount Furniture | — | NEW | New buy |
| 26 | RPAY | Repay Holdings CORP | — | EXIT | Sold out |
| 27 | CCC | Ccc Intelligent Solutions Ho | — | EXIT | Sold out |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-14 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-02-13 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-11-13 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-08-13 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-14 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-02-13 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-11-13 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-08-13 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-05-14 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-02-13 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-11-14 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-08-14 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-15 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-13 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-11-14 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-08-15 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-08-15 | Amendment | View on EDGAR |
| 2022-03-31 | 2022-05-13 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-02-11 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-15 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-08-16 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-17 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-16 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-11-16 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-14 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-05-15 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-02-14 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2019-11-14 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-08-14 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-05-15 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2019-02-14 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-11-14 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-08-14 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-05-15 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-02-14 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2017-11-14 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2017-08-14 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2017-05-15 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-02-15 | 13F-HR | View on EDGAR |
| 2016-09-30 | 2016-11-14 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2016-08-15 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2016-05-16 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-02-16 | 13F-HR | View on EDGAR |
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