SOUTHERNSUN ASSET MANAGEMENT, LLC
Long book
$689.9M
Q1 2026
Positions
31
Top-10 weight
52%
concentration
Last quarter
+11.0%
SPY +14.8%
Turnover
3%
of book per quarter
Strategy in plain words
auto-generated from filingsSOUTHERNSUN ASSET MANAGEMENT, LLC is a concentrated fundamental stock-picker, running a $689.9M US long book across 31 positions.
The portfolio is concentrated: the top 10 names carry 52% of the portfolio. The book barely moves quarter to quarter — a patient, low-turnover holder. Current anchor positions: DARLING INGREDIENTS INC, MURPHY USA INC, BOOT BARN HOLDINGS INC, LOUISIANA-PACIFIC CORP, EXTREME NETWORKS INC.
Over the last 9 quarters its long book ran on average 1.9pp per quarter behind the S&P 500, beating the index in 3 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
+11.1%
Q3 2024
-8.4%
Q4 2024
-10.9%
Q1 2025
+10.0%
Q2 2025
+10.5%
Q3 2025
-2.6%
Q4 2025
+6.4%
Q1 2026
+11.0%
Sector allocation
Industrials 35%
Other 15%
Consumer discretionary 13%
Consumer staples 9%
Healthcare 9%
Technology 7%
Financials 6%
Materials 3%
Long book by quarter
What does SOUTHERNSUN ASSET own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| DAR DARLING INGREDIENTS INC | Consumer staples | 780.1K | $48.2M | 7.0% | -31.3% |
| MUSA MURPHY USA INC | Consumer discretionary | 84.8K | $41.9M | 6.1% | -8.2% |
| BOOT BOOT BARN HOLDINGS INC | Consumer discretionary | 272.3K | $39.9M | 5.8% | +41.0% |
| LPX LOUISIANA-PACIFIC CORP | Other | 485.9K | $35.3M | 5.1% | +6.3% |
| EXTR EXTREME NETWORKS INC | Technology | 2.3M | $34.7M | 5.0% | +16.6% |
| LOB LIVE OAK BANCSHARES INC | Financials | 1.0M | $34.2M | 5.0% | +0.4% |
| USPH U.S. PHYSICAL THERAPY INC | Healthcare | 439.9K | $33.0M | 4.8% | -8.3% |
| BCO BRINK'S CO/THE | Industrials | 316.6K | $32.8M | 4.8% | -23.9% |
| CXT CRANE NXT CO | Industrials | 783.8K | $31.8M | 4.6% | +17.3% |
| BDC BELDEN INC | Industrials | 258.4K | $29.7M | 4.3% | -8.0% |
| AGCO AGCO CORP | Industrials | 247.3K | $28.7M | 4.2% | -8.4% |
| MSA MSA SAFETY INC | Healthcare | 170.5K | $28.0M | 4.1% | -8.2% |
| AWI ARMSTRONG WORLD INDUSTRIES | Other | 168.3K | $27.7M | 4.0% | +0.9% |
| DORM DORMAN PRODUCTS INC | Industrials | 246.5K | $25.7M | 3.7% | +29.4% |
| EPAC ENERPAC TOOL GROUP CORP | Industrials | 664.9K | $24.2M | 3.5% | +10.7% |
| MOD MODINE MANUFACTURING CO | Industrials | 110.3K | $23.9M | 3.5% | -55.6% |
| CSW CSW INDUSTRIALS INC | Other | 88.3K | $23.0M | 3.3% | +32.3% |
| SCL STEPAN CO | Other | 378.8K | $18.9M | 2.7% | -7.1% |
| NGVT INGEVITY CORP | Materials | 251.1K | $17.9M | 2.6% | -8.0% |
| SAM BOSTON BEER COMPANY INC-A | Consumer staples | 74.8K | $17.2M | 2.5% | -0.9% |
| AEIS ADVANCED ENERGY INDUSTRIES | Technology | 47.1K | $15.2M | 2.2% | -61.8% |
| KAI KADANT INC | Industrials | 43.0K | $12.6M | 1.8% | -4.5% |
| THO THOR INDUSTRIES INC | Industrials | 131.1K | $10.5M | 1.5% | -8.0% |
| APG API GROUP CORP | Services media | 255.3K | $10.3M | 1.5% | +1.0% |
| GNRC GENERAC HOLDINGS INC | Industrials | 48.7K | $9.5M | 1.4% | -12.5% |
| BR BROADRIDGE FINANCIAL SOLUTIO | Services media | 45.3K | $7.4M | 1.1% | +1.0% |
| WSO WATSCO INC | Consumer discretionary | 18.6K | $6.8M | 1.0% | +1.0% |
| VMI VALMONT INDUSTRIES | Industrials | 16.6K | $6.6M | 1.0% | -18.0% |
| SEIC SEI INVESTMENTS COMPANY | Financials | 67.4K | $5.3M | 0.8% | +1.4% |
| OSK OSHKOSH CORP | Industrials | 31.0K | $4.6M | 0.7% | +53.7% |
| FND FLOOR & DECOR HOLDINGS INC-A | Consumer discretionary | 87.4K | $4.4M | 0.6% | +15.7% |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 13, 2026 | 31 | $689.9M | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Feb 13, 2026 | 32 | $716.4M | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Nov 14, 2025 | 31 | $771.8M | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 14, 2025 | 31 | $712.1M | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | May 14, 2025 | 30 | $690.8M | canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Feb 14, 2025 | 30 | $802.7M | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Nov 14, 2024 | 29 | $843.7M | canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Aug 14, 2024 | 27 | $829.1M | canonical | SEC ↗ |
| Q1 2024 | 13F-HR | May 15, 2024 | 27 | $898.0M | canonical | SEC ↗ |
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