Sunriver Management LLC — 13F Holdings & Portfolio
CIK 1663900 · latest 13F-HR filed 2026-05-14
Sunriver Management LLC manages $591.3M in 13F-reported U.S. long-equity assets across 18 reported positions as of its 2026-03-31 13F-HR filing. Its largest disclosed positions are ARMK (9.59%), SSNC (9.12%), WCN (8.86%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 4 new positions, exited 9, added to 3, and trimmed 9.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
$591.3M
Long-equity book
18
Distinct positions
2026-03-31
Filed 2026-05-14
+4 / −9 / ↑3 / ↓9
vs 2025-12-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- CDW CORP$9.5M +41.1%
- ARAMARK$6.9M +13.8%
- LIVE NATION ENTERTAINMENT IN$4.7M +21.8%
Top Trims
- LOCKHEED MARTIN CORP-$40.6M -65.0%
- VERRA MOBILITY CORP-$24.2M -36.5%
- CBIZ INC-$23.9M -47.9%
- TRANSUNION-$21.5M -48.3%
- HURON CONSULTING GROUP INC-$18.4M -38.2%
New Positions
- WASTE CONNECTIONS INC$52.4M
- FIDELITY NATL INFORMATION SV$25.7M
- CAE INC$22.0M
- BOBS DISC FURNITURE INC$17.8M
Exited Positions
- BOX INC$52.1M
- RENTOKIL INITIAL PLC$50.0M
- SYSCO CORP$48.1M
- N-ABLE INC$45.9M
- HUNTINGTON INGALLS INDS INC$39.2M
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | ARAMARK | ARMK | 03852U106 | $56.7M | 9.59% | 1,398,349 | SH |
| 2 | SS&C TECH HLDGS | SSNC | 78467J100 | $53.9M | 9.12% | 797,849 | SH |
| 3 | WASTE CONNECTIONS INC | WCN | 94106B101 | $52.4M | 8.86% | 322,683 | SH |
| 4 | OPENLANE INC | OPLN | 48238T109 | $44.3M | 7.48% | 1,518,196 | SH |
| 5 | VERRA MOBILITY CORP | VRRM | 92511U102 | $42.1M | 7.11% | 2,943,917 | SH |
| 6 | FIRST ADVANTAGE CORP NEW | FA | 31846B108 | $35.7M | 6.03% | 3,032,711 | SH |
| 7 | CDW CORP | CDW | 12514G108 | $32.5M | 5.49% | 268,356 | SH |
| 8 | WEX INC | WEX | 96208T104 | $31.2M | 5.27% | 203,694 | SH |
| 9 | HURON CONSULTING GROUP INC | HURN | 447462102 | $29.8M | 5.04% | 233,820 | SH |
| 10 | PERFORMANCE FOOD GROUP CO | PFGC | 71377A103 | $29.6M | 5.00% | 345,211 | SH |
| 11 | LIVE NATION ENTERTAINMENT IN | LYV | 538034109 | $26.0M | 4.40% | 170,661 | SH |
| 12 | CBIZ INC | CBZ | 124805102 | $26.0M | 4.40% | 968,631 | SH |
| 13 | FIDELITY NATL INFORMATION SV | FIS | 31620M106 | $25.7M | 4.35% | 548,860 | SH |
| 14 | TRANSUNION | TRU | 89400J107 | $23.0M | 3.88% | 331,809 | SH |
| 15 | CAE INC | CAE | 124765108 | $22.0M | 3.72% | 844,393 | SH |
| 16 | LOCKHEED MARTIN CORP | LMT | 539830109 | $21.9M | 3.71% | 36,270 | SH |
| 17 | STANLEY BLACK & DECKER INC | SWK | 854502101 | $20.8M | 3.52% | 293,036 | SH |
| 18 | BOBS DISC FURNITURE INC | BOBS | 09681N106 | $17.8M | 3.02% | 1,517,451 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-03-31 | 2026-05-14 | $591.3M | 18 | 0001892688-26-000072 |
| 2025-12-31 | 2026-02-13 | $953.9M | 23 | 0001892688-26-000031 |
| 2025-09-30 | 2025-11-13 | $920.0M | 21 | 0001892688-25-000189 |