ACK Asset Management LLC
Annual return '25
+27.0%
SPY '25
+17.7%
Alpha
+9.3ptsvs SPY
Invested
$801.1M
Holdings
20
Trades YTD
0
Performance · Fund vs SPY
Cumulative return · quarterly snapshotsCoverage 100%. 4 quarters of 2025 measured against SPY adj-close benchmark.
Top holdings · current snapshot
Source: 13F-HR01
$MTRN
MTRN
Q4 2024: New position (494.8k shares)
8.6%
02
$WMS
WMS
Held since at least Q1 2024
6.7%
03
$ATS
ATS
Q4 2024: New position (2.09M shares)
6.5%
04
$ROG
ROG
Q1 2026: New position (2.6k shares)
6.4%
05
$HLIO
HLIO
Held since at least Q1 2024
6.3%
06
$LFUS
LFUS
Held since at least Q1 2024
5.7%
07
$CNM
CNM
Q1 2026: New position (45.3k shares)
5.5%
08
$NOVT
NOVT
Held since at least Q1 2024
5.5%
09
$SITE
SITE
Held since at least Q1 2024
5.5%
10
$ASTE
ASTE
Q1 2026: Sold 99.4% (2.4k → 14 shares)
5.3%
Recent trades · Last 90 days
No Form 4 / 13D / 13G trade events on file in the recent window. 13F filers report position snapshots quarterly rather than per-trade events, so this section is most useful for managers who also file Form 4 or 13D/G.
Convergence · Pattern Engine ships in v1.1
30-day windowIn development
Convergence participation lands with the Pattern Engine.
Once the Pattern Engine ships, this section will list every active convergence event this fund is named in — with the other named funds, the Congress members on the same name, and combined position size.
Source data: SEC EDGAR · 13F-HR filings · Performance through 2025-12-31 · Last refreshed 10:37 UTC.