Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

Limbach Holdings, Inc.

LMB · Nasdaq · CIK 0001606163 · Industrials · Building Products & Equipment

INSIDER SIGNAL

No active buy signal

4 qualifying P purchase groups
in the current 180-day scoring window

15 Form 4 transaction lines observed in the same window
7 sales · 1 option, withholding, award, gift or other lines

Last qualifying purchase2026-09-15 · Krzeminski Laurel J · $25.3K

WHY NO ACTIVE SIGNAL?

Purchase activityPresent
Recent buying4 qualifying line group(s)
Recent salesModerate
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Sharp JayExecutive Vice President
○▼▼
Brooks Jayme L.Chief Financial Officer
▼▼
Horowitz Joshua; Palm Global Small Cap Master Fund LPDirector; Other
●●
Krzeminski Laurel JDirector
●
Gaboury David RichardDirector
●
● Purchase▼ Sale○ Other

—

Purchase breadth & concentration

QUALIFYING BUYERS3
PURCHASE CONCENTRATION76%Largest buyer: Horowitz Joshua; Palm Global Small Cap Master Fund LP · $391.0K
CLUSTER BUYING · 15D3 insidersPeak activity: 2026-09-11–2026-09-15

Roles in the peak window: Director, Director; Other. Concentration uses priced qualifying P lines only and does not change the saved score.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2026-09-15 · Krzeminski Laurel J.

Recent Form 4 activity

7Purchases
23Sales
33Other Form 4 lines
26SEC filings · 365 days
BUYING7 qualifying P line(s) · 180 days
SELLING7 sale line(s) · context only
OTHER1 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
1,106,928
Previous report
963,979
Avg daily volume
290,917
Days to cover
3.8

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-15Krzeminski Laurel JPurchase (P)Common Stock500USD 50.58USD 25,290SEC filing ↗
2026-09-15Horowitz Joshua; Palm Global Small Cap Master Fund LPPurchase (P)Common Stock4,220USD 50.71USD 214,008SEC filing ↗
2026-09-14Gaboury David RichardPurchase (P)Common Stock1,940USD 51.35USD 99,619SEC filing ↗
2026-09-11Horowitz Joshua; Palm Global Small Cap Master Fund LPPurchase (P)Common Stock3,600USD 49.17USD 177,016SEC filing ↗
2025-08-12Gaboury David RichardPurchase (P)Common Stock1,400USD 106.00USD 148,400SEC filing ↗
2024-12-10Gaboury David RichardPurchase (P)Common Stock531USD 94.51USD 50,185SEC filing ↗
2024-09-12Gaboury David RichardPurchase (P)Common Stock340USD 72.70USD 24,718SEC filing ↗
2024-09-09ALVARADO LINDA GPurchase (P)Common Stock901USD 64.30USD 57,938SEC filing ↗
2024-09-05Gaboury David RichardPurchase (P)Common Stock1,200USD 62.20USD 74,640SEC filing ↗
2024-05-21Brooks Jayme L.Purchase (P)Common Stock943USD 52.15USD 49,177SEC filing ↗
2024-05-17McCann Michael MPurchase (P)Common Stock2,099USD 47.77USD 100,269SEC filing ↗
2023-08-22Brooks Jayme L.Purchase (P)Common Stock1,398USD 34.68USD 48,483SEC filing ↗
2023-08-21McCann Michael MPurchase (P)Common Stock2,866USD 35.47USD 101,657SEC filing ↗
2022-11-22Horowitz Joshua; Palm Global Small Cap Master Fund LP; Palm Management (US) LLC; Palmer Bradley CPurchase (P)Common Stock2,127USD 10.48USD 22,291SEC filing ↗
2022-11-21Horowitz Joshua; Palm Global Small Cap Master Fund LP; Palm Management (US) LLC; Palmer Bradley CPurchase (P)Common Stock710USD 9.52USD 6,759SEC filing ↗

Form 4 evidence

63 transaction lines in the latest 365-day window; 335 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-15Sharp JaySale (S)Common Stock5,094USD 50.21USD 255,770SEC filing ↗
2026-09-15Krzeminski Laurel JPurchase (P)Common Stock500USD 50.58USD 25,290SEC filing ↗
2026-09-15Horowitz Joshua; Palm Global Small Cap Master Fund LPPurchase (P)Common Stock4,220USD 50.71USD 214,008SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-15Sharp JaySale (S)Common Stock5,094USD 50.21USD 255,770SEC filing ↗
2026-09-15Krzeminski Laurel JPurchase (P)Common Stock500USD 50.58USD 25,290SEC filing ↗
2026-09-15Horowitz Joshua; Palm Global Small Cap Master Fund LPPurchase (P)Common Stock4,220USD 50.71USD 214,008SEC filing ↗
2026-09-14Gaboury David RichardPurchase (P)Common Stock1,940USD 51.35USD 99,619SEC filing ↗
2026-09-11Horowitz Joshua; Palm Global Small Cap Master Fund LPPurchase (P)Common Stock3,600USD 49.17USD 177,016SEC filing ↗
2026-06-15Sharp JaySale (S)Common Stock4,871USD 79.82USD 388,803SEC filing ↗
2026-06-15Sharp JayGift (G)Common Stock720USD 0.00USD 0SEC filing ↗
2026-04-30Brooks Jayme L.Sale (S)Common Stock3,440USD 100.00USD 344,000SEC filing ↗
2026-04-24Brooks Jayme L.Sale (S)Common Stock2,173USD 100.05USD 217,409SEC filing ↗
2026-04-13Brooks Jayme L.Sale (S)Common Stock5,703USD 85.43USD 487,207SEC filing ↗
2026-04-09Brooks Jayme L.Sale (S)Common Stock841USD 85.11USD 71,578SEC filing ↗
2026-04-08Brooks Jayme L.Sale (S)Common Stock3,366USD 85.19USD 286,750SEC filing ↗
2026-03-17Brooks Jayme L.Sale (S)Common Stock9,910USD 78.56USD 778,531SEC filing ↗
2026-03-16Sharp JaySale (S)Common Stock2,000USD 79.99USD 159,972SEC filing ↗
2026-03-16Sharp JayGift (G)Common Stock700USD 0.00USD 0SEC filing ↗
2026-03-02Sharp JayTax withholding (F)Common Stock12,359USD 89.17USD 1,102,052SEC filing ↗
2026-03-02Sharp JayAward / grant (A)Common Stock28,747USD 0.00USD 0SEC filing ↗
2026-03-02McCann Michael MTax withholding (F)Common Stock20,466USD 89.17USD 1,824,953SEC filing ↗
2026-03-02McCann Michael MAward / grant (A)Common Stock52,008USD 0.00USD 0SEC filing ↗
2026-03-02Brooks Jayme L.Tax withholding (F)Common Stock16,070USD 89.17USD 1,432,962SEC filing ↗
2026-03-02Brooks Jayme L.Award / grant (A)Common Stock40,835USD 0.00USD 0SEC filing ↗
2026-03-02Angerosa NicholasTax withholding (F)Common Stock8,878USD 89.17USD 791,651SEC filing ↗
2026-03-02Angerosa NicholasAward / grant (A)Common Stock22,559USD 0.00USD 0SEC filing ↗
2026-01-01Sharp JayOption exercise / conversion (M)Common Stock1,416USD 0.00USD 0SEC filing ↗
2026-01-01Sharp JayTax withholding (F)Common Stock1,756USD 77.85USD 136,705SEC filing ↗
2026-01-01McNally Michael FOption exercise / conversion (M)Common Stock956USD 0.00USD 0SEC filing ↗
2026-01-01McCann Michael MOption exercise / conversion (M)Common Stock9,905USD 0.00USD 0SEC filing ↗
2026-01-01McCann Michael MTax withholding (F)Common Stock2,538USD 77.85USD 197,583SEC filing ↗
2026-01-01Krzeminski Laurel JOption exercise / conversion (M)Common Stock956USD 0.00USD 0SEC filing ↗
2026-01-01Horowitz JoshuaOption exercise / conversion (M)Common Stock956USD 0.00USD 0SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerLMB
CIK0001606163
SectorIndustrials
IndustryBuilding Products & Equipment Yahoo Finance
SEC SIC1700 Construction - Special Trade Contractors
ExchangeNasdaq

Data coverage

Local Form 4 history335 transaction lines from 2020-01-01 to 2026-09-15
63 P purchase lines · 64 S sale lines · 208 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.