12th Street Asset Management Company, LLC
SEC Form 13F institutional filer · CIK 0001633703
13F-HR · 10 reported holdings · 2026-03-31
Reported long-US-equity value
$0.15B
Top-10 concentration
100.0%
12th Street Asset Management Company, LLC — $153M AUM allocation strategy
12th Street Asset Management Company, LLC files SEC Form 13F and reports $153M of long US equity value across 10 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 24.2%, followed by Materials 22.9% and Consumer Discretionary 18.3%.
The top 10 holdings account for 100% of reported value — a conviction-weighted book concentrated in its best ideas. The sector and industry splits below are of the same reported value. Track quarter-over-quarter adds, trims, new positions and exits below — sourced from SEC 13F filings, public domain.
12th Street Asset Management Company, LLC — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$153M
total across 10 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
100% of value
higher = narrower conviction; lower = spread / hedging
Biggest trims (shares)
−$CIEN −116K sh · −$17.4M−$MAS −11.3K sh · −$1.41M−$IWM −2.32K sh · −$925K
Exited to nil (held last quarter, gone now)
None this quarter
Sector allocation (share of reported value)
each slice is a share of the reported long-US-equity value — smaller sectors and the rest of the book roll into “Other holdings”
Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.
Industry allocation (share of reported value)
- Construction Materials22.9%—
- Automotive Retail18.3%—
- Communications Equipment16.1%—
- Building Products8.9%—
- Heavy Electrical Equipment8.5%—
- Technology Hardware, Storage & Peripherals8.1%—
- Property & Casualty Insurance6.6%—
- Oil & Gas Exploration & Production6.4%—
- Other holdings4.2%—
the finer GICS cut of the same book — same denominator — smaller industries roll into “Other holdings”
Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.
Top S&P 500 holdings
9 of 9 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $CRH | CRH PLC | 333K | $35M | +7.49K | 22.9% |
| $AZO | AutoZone Inc | 8.3K | $28M | -325 | 18.3% |
| $CIEN | Ciena Corporation | 63.5K | $24.6M | -116K | 16.1% |
| $MAS | Masco Corporation | 225K | $13.6M | -11.3K | 8.9% |
| $GNRC | Generac Holdlings Inc | 66.9K | $13.1M | — | 8.5% |
| $DELL | Dell Technologies Inc | 75.1K | $12.3M | -1.13K | 8.1% |
| $PGR | Progressive Corporation | 50.6K | $10M | -2.08K | 6.6% |
| $FANG | Diamondback Energy Inc | 49.3K | $9.75M | -1.05K | 6.4% |
| $AES | The AES Corporation | 62.1K | $5.81M | +228 | 3.8% |
…and 1 more holdings in the full 13F filing (top positions only shown).
SEC Form 13F data sets · public domain · 45-day filing lag · >$100M AUM managers · as reported
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How to read Δ QoQ — the five insight categories, and the caveats
The categories. Analysts, quants and retail traders look past total portfolio value to isolate actionable signals. Five categories matter.
Conviction & concentration shifts
New positions vs complete exits — a brand-new stock signals high conviction; a full liquidation suggests a broken thesis or tax-loss harvesting. Aggressive sizing — look at share count, not dollars: a 20% share increase during a drawdown is strong dip-buying. Concentration — a narrowing top-5/10 means conviction; spreading capital across more names means hedging.
Sector & macro allocation rotations
Aggregating Δ QoQ moves across sectors shows where smart money is leaning in or sneaking out — rotating out of growth into defensives or energy, for example. The fund's total long equity exposure quarter-over-quarter is a proxy for overall institutional risk appetite.
Crowding & smart-money consensus
When several managers initiate or expand the same stock in the same quarter, that is institutional consensus. Contrarian reads: top pickers buying hard into a beaten-down name the market is selling.
Derivative & option overlays
Reported call/put changes indicate whether managers are adding downside hedges or leveraging upside exposure. Note: a long increase may be half of a market-neutral pair trade.
Who reads this
| Retail "cloners" | High-conviction ideas to replicate ~45 days after quarter-end. |
| Corporate IR | Which funds bought or dumped the stock, before the next call. |
| Quant / algo traders | Cross-sectional factor inputs: flow, momentum, ownership. |
Four caveats before you trade on it
- 45-day lag — holdings are quarter-end; positions may already be closed.
- Long-only — 13Fs miss shorts, pair trades and cash.
- No non-US / fixed income — the picture is US equities plus options.
- Corporate actions — splits and spinoffs distort raw share deltas.
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