Sunriver Management LLC
Long book
$591.3M
Q1 2026
Positions
18
Top-10 weight
69%
concentration
Last quarter
+11.3%
SPY +14.8%
Turnover
48%
of book per quarter
Strategy in plain words
auto-generated from filingsSunriver Management LLC is a concentrated fundamental stock-picker, running a $591.3M US long book across 18 positions.
The portfolio is concentrated: the top 10 names carry 69% of the portfolio. The portfolio is actively managed, with meaningful quarterly turnover. Current anchor positions: ARAMARK, SS&C TECHNOLOGIES HOLDINGS, WASTE CONNECTIONS INC, OPENLANE INC, VERRA MOBILITY CORP.
Over the last 9 quarters its long book ran on average 3.9pp per quarter behind the S&P 500, beating the index in 1 of 9 quarters. We rate its filings highest-signal: new buys here are worth attention.
Implied long-book return vs S&P 500
methodology: positions priced quarterly, no shorts/options Fund long book S&P 500
Q1 2024
-3.5%
Q2 2024
+6.4%
Q3 2024
+1.8%
Q4 2024
-5.9%
Q1 2025
+5.6%
Q2 2025
+0.2%
Q3 2025
+1.6%
Q4 2025
-12.6%
Q1 2026
+11.3%
Sector allocation
Consumer discretionary 31%
Services media 27%
Technology 19%
Industrials 14%
Utilities 9%
Long book by quarter
What does Sunriver Management own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| ARMK ARAMARK | Consumer discretionary | 1.4M | $56.7M | 9.6% | +3.5% |
| SSNC SS&C TECHNOLOGIES HOLDINGS | Technology | 797.8K | $53.9M | 9.1% | +26.5% |
| WCN WASTE CONNECTIONS INC | Utilities | 322.7K | $52.4M | 8.9% | New |
| OPLN OPENLANE INC | Consumer discretionary | 1.5M | $44.3M | 7.5% | +1.3% |
| VRRM VERRA MOBILITY CORP | Industrials | 2.9M | $42.1M | 7.1% | -0.4% |
| FA FIRST ADVANTAGE CORP | Technology | 3.0M | $35.7M | 6.0% | +14.0% |
| CDW CDW CORP/DE | Consumer discretionary | 268.4K | $32.5M | 5.5% | +58.8% |
| WEX WEX INC | Services media | 203.7K | $31.2M | 5.3% | -38.1% |
| HURN HURON CONSULTING GROUP INC | Services media | 233.8K | $29.8M | 5.0% | -16.2% |
| PFGC PERFORMANCE FOOD GROUP CO | Consumer discretionary | 345.2K | $29.6M | 5.0% | -24.0% |
| LYV LIVE NATION ENTERTAINMENT IN | Services media | 170.7K | $26.0M | 4.4% | +13.8% |
| CBZ CBIZ INC | Services media | 968.6K | $26.0M | 4.4% | -2.1% |
| FIS FIDELITY NATIONAL INFO SERV | Services media | 548.9K | $25.7M | 4.4% | New |
| TRU TRANSUNION | Services media | 331.8K | $23.0M | 3.9% | -35.9% |
| CAE CAE INC | Technology | 844.4K | $22.0M | 3.7% | New |
| LMT LOCKHEED MARTIN CORP | Industrials | 36.3K | $21.9M | 3.7% | -72.0% |
| SWK STANLEY BLACK & DECKER INC | Industrials | 293.0K | $20.8M | 3.5% | -32.4% |
| BOBS BOB'S DISCOUNT FURNITURE | Consumer discretionary | 1.5M | $17.8M | 3.0% | New |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 14, 2026 | 18 | $591.3M | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Feb 13, 2026 | 23 | $953.9M | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Nov 13, 2025 | 21 | $920.0M | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 13, 2025 | 23 | $932.6M | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | May 14, 2025 | 22 | $810.3M | canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Feb 13, 2025 | 19 | $835.7M | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Nov 13, 2024 | 17 | $813.5M | canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Aug 13, 2024 | 20 | $790.0M | canonical | SEC ↗ |
| Q1 2024 | 13F-HR | May 14, 2024 | 20 | $765.2M | canonical | SEC ↗ |
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