Insider Tracker SEC Form 4 insider trades
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LMB

Limbach Holdings, Inc.

Industrials Construction - Special Trade Contractors Market cap: $579.0M All insider activity → Quote and statistics → Sign in to watch LMB Sign in to set a price alert

AI summary Directors buy open-market shares following the acquisition of 1901 Inc.

61
Insider Score Band 60–79
Research score
52
AI adjustment
+9

Research score, not a recommendation.

Total bought$515.9K7 Form 4 purchases
Distinct insiders3open-market buyers
Lead insiderHorowitz JoshuaDirector
Cluster window2026-09-11 → 2026-09-15active

Market data

Live quote and chart from Yahoo Finance, loaded through this server. Insider purchases are marked on the chart.

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Why this score

Research score: a weighted blend of the five factors, times the routine and offering discounts, minus the selling penalty.

Breadth number & diversity of participating insiders
37%
Seniority executive rank of buyers (CEO/CFO/Director)
60%
Commitment purchase size relative to company & holdings
62%
Context buying into stock weakness signals conviction
100%
Timing coordinated purchases within a tight window
99%
Routine-purchase discount × 1.00
Company-type / offering discount × 1.00
Net insider selling penalty − 0

Why are they buying?

AI · discretionary · catalyst credible · documented

Directors likely increased their stakes following the strategic acquisition of Wisconsin-based MEP contractor 1901 Inc. announced on September 1, 2026.

Joshua Horowitz and David Richard Gaboury, along with Laurel J. Krzeminski, purchased shares in the open market between September 11 and September 15, 2026, shortly after the company closed its $63 million acquisition to expand its Midwest presence and capabilities.

Stock Price & Insider Purchase History

Daily close price with open-market insider purchases plotted over time

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Transactions

7 Form 4 trades · 3 insiders Sign in to download CSV
Purchases in this cluster, grouped by insider, largest first
Date Insider Role Shares Price Value Filing
2026-09-11 → 2026-09-15 Horowitz Joshua 9 purchases with a 63-day result · median +0.7% Director 7,820 $50.00 avg $391.0K
2026-09-11 Horowitz Joshua 2,600 $49.01 $127.4K SEC filing for Horowitz Joshua (opens in a new tab)
2026-09-11 Horowitz Joshua 1,000 $49.59 $49.6K SEC filing for Horowitz Joshua (opens in a new tab)
2026-09-15 Horowitz Joshua 662 $51.25 $33.9K SEC filing for Horowitz Joshua (opens in a new tab)
2026-09-15 Horowitz Joshua 3,346 $50.61 $169.3K SEC filing for Horowitz Joshua (opens in a new tab)
2026-09-15 Horowitz Joshua 212 $50.66 $10.7K SEC filing for Horowitz Joshua (opens in a new tab)
2026-09-14 Gaboury David Richard 4 purchases with a 63-day result · median +6.5% Director 1,940 $51.35 $99.6K SEC filing for Gaboury David Richard (opens in a new tab)
2026-09-15 Krzeminski Laurel J history of Krzeminski Laurel J's purchases Director 500 $50.58 $25.3K SEC filing for Krzeminski Laurel J (opens in a new tab)
Total $515.9K

Other buying runs at LMB

A run ends after a pause in the buying, so one company can have several. Returns are the stock's return minus its benchmark's (IWM for small companies, SPY otherwise), from the first open after the run became a cluster. Past results, not a forecast.

After this run became a cluster: 21 days -3.8%63 days –126 days –

Other insider buying runs at this company, newest first, with the return against the benchmark that followed
Window Insiders Total Score 21 days63 days126 days Status
2022-05-16 → 2022-06-01 4 $142.6K 58 -1.5%+37.1%+91.5% closed
2022-03-22 → 2022-03-31 6 $149.8K 61 +1.5%-4.8%+20.5% closed
2021-12-07 → 2021-12-31 4 $419.2K 58 +16.9%-0.6%-2.5% closed
2020-09-03 → 2020-09-29 4 $684.3K 57 +18.7%+38.4%+0.8% closed
2019-11-20 → 2019-12-10 3 $293.5K 63 +38.2%+66.2%+25.6% closed