12th Street Asset Management Company, LLC reported 31 positions worth $650.27M for the quarter ended Jun 30, 2026, up 13.5% on the prior quarter. It opened 4 new positions, added to 14, trimmed 13 and exited 3. Its largest holding is Clean Harbors Inc at 7.7% of the portfolio.
Reported 13F market value at each quarter end. A change mixes trading with price moves in the positions held.
Dollar value of shares bought and sold each quarter, at that quarter’s price. It counts trading only, not price changes.
How many positions were opened, added to, trimmed or closed each quarter.
Share of reported value in each sector at every quarter end.
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| POOL Pool Corp | +114.6K | – | $24.64M | 3.79% |
| SSNC SS&C Technologies Holdings Inc | +335.2K | – | $20.80M | 3.2% |
| MRTN Marten Transport Ltd | +758.6K | – | $13.16M | 2.02% |
| SITE SiteOne Landscape Supply, Inc. | +75.5K | – | $8.64M | 1.33% |
| HQY Healthequity, Inc. | +94.0K | +37.4% | $8.49M | 4.8% |
| KNX Knight-Swift Transportation Holdings Inc. | +59.4K | +12.1% | $4.63M | 6.57% |
| PNFP Pinnacle Financial Partners, Inc. | +28.4K | +7.1% | $2.86M | 6.68% |
| GVA Granite Construction Inc | +14.7K | +23.5% | $2.32M | 1.87% |
| LPX Louisiana-Pacific Corp | +25.7K | +60.0% | $2.02M | 0.83% |
| BC Brunswick Corp | +14.4K | +4.1% | $1.21M | 4.74% |
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| LKQ Lkq Corp | -657.8K | -47.5% | $17.32M | 2.94% |
| FHN First Horizon Corp | -698.9K | -100.0% | $15.91M | Exited |
| CLH Clean Harbors Inc | -38.2K | -18.7% | $11.41M | 7.65% |
| CIEN Ciena Corp | -16.7K | -26.3% | $8.20M | 3.53% |
| SNEX StoneX Group Inc. | -99.6K | -35.5% | $7.86M | 2.2% |
| DY Dycom Industries Inc | -13.4K | -19.5% | $6.76M | 4.28% |
| IIIV i3 Verticals, Inc. | -298.9K | -57.2% | $6.39M | 0.735% |
| GOLF Acushnet Holdings Corp. | -62.1K | -100.0% | $5.81M | Exited |
| AZO Autozone Inc | -1,719 | -20.7% | $5.49M | 3.23% |
| FBK FB Financial Corp | -74.5K | -30.2% | $4.13M | 1.47% |
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | CLH Clean Harbors Inc | Industrials | 166.5K | $49.75M | 7.65% | -38.2K | -18.7% | Reduced | 0.32% |
| 2 | PNFP Pinnacle Financial Partners, Inc. | Financial Services | 430.7K | $43.44M | 6.68% | +28.4K | +7.1% | Added | 0.29% |
| 3 | KNX Knight-Swift Transportation Holdings Inc. | Industrials | 548.8K | $42.73M | 6.57% | +59.4K | +12.1% | Added | 0.34% |
| 4 | KEX Kirby Corp | Industrials | 292.6K | $39.78M | 6.12% | +1,426 | +0.5% | Added | 0.55% |
| 5 | CRH Crh Public Ltd Co | Basic Materials | 335.9K | $35.94M | 5.53% | +3,300 | +1.0% | Added | 0.05% |
| 6 | SGI Somnigroup International Inc. | Consumer Discretionary | 413.0K | $32.38M | 4.98% | +4,403 | +1.1% | Added | 0.2% |
| 7 | HQY Healthequity, Inc. | Financial Services | 345.4K | $31.20M | 4.8% | +94.0K | +37.4% | Added | 0.41% |
| 8 | BC Brunswick Corp | Consumer Discretionary | 366.3K | $30.85M | 4.74% | +14.4K | +4.1% | Added | 0.56% |
| 9 | DELL Dell Technologies Inc. | Technology | 70.6K | $30.47M | 4.69% | -4,493 | -6.0% | Reduced | 0.02% |
| 10 | DY Dycom Industries Inc | Industrials | 55.1K | $27.86M | 4.28% | -13.4K | -19.5% | Reduced | 0.18% |
| 11 | RBA Rb Global Inc. | Industrials | 222.2K | $25.88M | 3.98% | +9,974 | +4.7% | Added | 0.12% |
| 12 | POOL Pool Corp | Industrials | 114.6K | $24.64M | 3.79% | +114.6K | – | New | 0.32% |
| 13 | CIEN Ciena Corp | Technology | 46.8K | $22.95M | 3.53% | -16.7K | -26.3% | Reduced | 0.03% |
| 14 | AZO Autozone Inc | Consumer Discretionary | 6,582 | $21.04M | 3.23% | -1,719 | -20.7% | Reduced | 0.04% |
| 15 | SSNC SS&C Technologies Holdings Inc | Technology | 335.2K | $20.80M | 3.2% | +335.2K | – | New | 0.14% |
Tip. Select a row to see that position’s full history at 12th Street Asset Management Company.
As of its Q2 2026 13F filing, 12th Street Asset Management Company, LLC’s five largest positions were Clean Harbors Inc (CLH) at 7.7%, Pinnacle Financial Partners, Inc. (PNFP) at 6.7%, Knight-Swift Transportation Holdings Inc. (KNX) at 6.6%, Kirby Corp (KEX) at 6.1%, Crh Public Ltd Co (CRH) at 5.5% of the reported portfolio.
12th Street Asset Management Company, LLC reported a 13F portfolio worth $650.27M across 31 positions for Q2 2026. That is up 13.5% from the previous quarter.
Its largest purchases by value were Pool Corp ($24.64M), SS&C Technologies Holdings Inc ($20.80M), Marten Transport Ltd ($13.16M). It opened 4 new positions.
Its largest sales by value were Lkq Corp ($17.32M), First Horizon Corp ($15.91M), Clean Harbors Inc ($11.41M). It exited 3 positions entirely.
From the Form 13F-HR reports 12th Street Asset Management Company, LLC files with the SEC each quarter, within 45 days of quarter end. A 13F lists long positions in US-listed equities and options; it excludes short positions, cash, bonds and most non-US holdings.
13F data reflects long positions in US-listed equities and options as reported to the SEC up to 45 days after quarter end. It excludes short positions, cash, bonds and most non-US securities, so it is not a complete picture of a manager’s assets.