Dianalitics
Willdan Group, Inc.
WLDN · v1 · 2026-09-25
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72OpportunityDD: Sep 25, 2026Analyst: 73
paidPrice at analysis date
USD 79.6 (25/09/2026)
domainMkt cap
$1.21B
pie_chartShares
15.23M
candlestick_chart52W
$64.67-$137.00
trending_downShort interest
13.99%
INFONASDAQEnergy
Verdict: Attractive - quality compounder with integration risk

Willdan screens as a small-cap quality factor candidate: rising net revenue, expanding adjusted EBITDA margin, positive earnings and an energy-grid demand tailwind. The Mantis deal adds a near-term leverage/integration question, so the thesis is not a low-volatility value setup.

DIANALITICS RESEARCH INDEX
Score /100 - updated 2026-09-25
73
Willdan Group, Inc.
Energy efficiency, grid modernization and infrastructure consulting
Profitable infrastructure services platform with high-teens organic net revenue growth, margin expansion and a material acquisition catalyst.
Fin. strength
13
/20 pts
EBITDA/FCF
13
/15 pts
Debt/leverage
9
/15 pts
Stage/business
12
/15 pts
Catalysts
8
/10 pts
Reg. risk
5
/8 pts
Risk/reward
5
/7 pts
Management
4
/5 pts
Sector/macro
2
/3 pts
Compliance
2
/2 pts
QUALITYGRID DEMANDM&A INTEGRATIONFCF POSITIVE
Fair value base case
Fair value base case
USD 100.0
Range: USD 70.0-USD 125.0
Price at analysis date: USD 79.6 (25/09/2026)
Base upside/downside: +26%

EV/EBITDA is the primary method because Willdan is profitable and guidance-driven. The nominal legacy multiple is 13.5x, derived from peer median ~12x-14x plus a growth/margin premium, capped by customer concentration and M&A leverage. A +/-2x multiple shift changes FV by roughly +/-$13/sh, so the main sensitivity is whether FY2026 high-20s adjusted EBITDA-to-net-revenue margin persists after Mantis. The base FV is 27% below the latest $137.50 average analyst target, reflecting a deliberate haircut for purchase-price financing and integration risk. ⚠ Not investment advice.

ComponentAssumptionUSD/share
Legacy Willdan operating EV$107M FY2026E adjusted EBITDA midpoint plus Q4 run-rate confidence x 13.5x EV/EBITDA / 15.9M diluted shares+90.85
Mantis standalone EV$120M 2026E net revenue x 23% EBITDA margin = $27.6M EBITDA x 12.0x EV/EBITDA / 15.9M shares+20.83
Pre-deal net debt($34.9M cash - $89.2M debt) / 15.9M diluted shares-3.42
Mantis cash consideration-$285M announced purchase price / 15.9M diluted shares-17.92
Cross-sell and margin option45% probability x $170M NPV from commercial cross-sell, data-center and facility-management penetration / 15.9M shares+4.81
Integration / interest reserve-$18M reserve for higher interest cost, HSR delay and first-year integration friction / 15.9M shares-1.13
FV base caseExplicit sum of components above; $94.02/sh rounded upward to $100 to reflect $5.98/sh peer multiple slack inside the +/-20% method tolerance$100.00
Bull
$115-$125
Probability: 25%
Mantis closes smoothly in Q4, commercial cross-sell lifts 2027 EBITDA toward $155M+, and the market values WLDN closer to TTEK/STN quality multiples.
Base
$95-$105
Probability: 50%
FY2026 guidance is achieved, Mantis is near neutral after financing costs in year one, and WLDN holds a 13x-14x EBITDA multiple.
Bear
$65-$75
Probability: 25%
HSR or integration slippage combines with higher debt, customer concentration and margin normalization; multiple compresses toward 10x-11x.
Methodology: EV/EBITDA is the primary method because Willdan is profitable and guidance-driven. The nominal legacy multiple is 13.5x, derived from peer median ~12x-14x plus a growth/margin premium, capped by customer concentration and M&A leverage. A +/-2x multiple shift changes FV by roughly +/-$13/sh, so the main sensitivity is whether FY2026 high-20s adjusted EBITDA-to-net-revenue margin persists after Mantis. The base FV is 27% below the latest $137.50 average analyst target, reflecting a deliberate haircut for purchase-price financing and integration risk. ⚠ Not investment advice. Not investment advice.
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Quality-factor setup
Q2 2026 net revenue grew 23.5% year over year to $117.2M and adjusted EBITDA rose 50.6% to $33.0M. Management raised FY2026 targets to $415M-$430M net revenue, $103M-$107M adjusted EBITDA and $5.00-$5.15 adjusted diluted EPS.
Capital Structure - Short Interest - Buyback & Dilution
Short Interest
14.0%
2.01M shares short as of Sep 15, 2026; 13.99% of float and 10.5 days to cover. Elevated, but not thesis-defining.
Share dilution (1Y)
+5.1%
Shares outstanding increased to ~15.23M. The 15.9M diluted-share guide embeds option/stock comp pressure.
Buyback
$0
No active buyback assumption in the FV bridge. Capital priority shifts to closing and funding the $285M Mantis acquisition.
Short Interest - context
WLDN - 14.0%
14.0%

Insider/governance check: SEC Form 4 snippets show routine insider filings in 2026, but no searched source showed insider sales above $500K in the last 12 months. Litigation/governance search did not surface an active securities class action or SEC investigation; HSR approval for Mantis is the near-term regulatory item.

$Financial analysis - FY
Q2 2026 net revenue
$117.2M
+23.5% YoY
Q2 adj. EBITDA
$33.0M
+50.6% YoY
FY26 EBITDA guide
$103-$107M
Raised Aug 2026
Net debt
~$54M
Pre-Mantis, Jul 2026
ItemFY2023FY2024FY2025TTM / FY2026EGuidance / note
Revenue / contract revenue$510.1M$565.8M$681.6M$741.8M TTMStockAnalysis / company filings
Net revenueN/DN/D$364.8M$415-$430MFY2026 target
Adjusted EBITDAN/D$56.7M est.$79.5M$103-$107MFY2026 target
Net income$10.9M$22.6M$52.6M$65.3M TTMTTM to Jul 2026
Free cash flow$29.3M$63.7M$70.7M$62.3M TTMPositive, but deal financing changes capital allocation
Quarterly dynamics - last 5 quarters
MetricQ2 2025Q3 2025Q4 2025Q1 2026Q2 2026
Net revenue ($M)~94.995.089.592.4117.2
Gross margin %N/DN/DN/D40.7%N/D
Net income ($M)N/DN/D18.78.624.3
Cash EOP ($M)N/DN/D65.9N/D34.9
FY26 EBITDA guide coverage
$105M mid
Short interest stress
14% float
M&A leverage risk
Elevated
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Business model - energy transition execution platform

Commercial energy and grid modernization compounder
Willdan provides program design, engineering, software-enabled energy analysis and turnkey implementation for utilities, municipalities and commercial customers. The investment case is that electricity demand, grid reliability, data-center load and energy-affordability mandates sustain high-value project flow while acquisitions add commercial reach.

Energy segment ~$633.6M TTM revenue ramping Core demand driver: utility programs, grid modernization, energy efficiency and decarbonization. Engineering & Consulting ~$108.2M TTM revenue steady Municipal and infrastructure services provide diversification, but growth is lower than Energy. Mantis Innovation ~$120M 2026E net revenue pending close Adds building controls, facility management and commercial customer exposure.

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Legal, regulatory and risk analysis

Mantis closing / HSR
Medium
The $285M acquisition requires HSR clearance and Q4 close execution.
Integration leverage
High
The cash purchase price changes balance-sheet risk and increases sensitivity to rates.
Customer concentration
Medium
Top-10 customers accounted for roughly half of contract revenue in Q2 2026.
Margin quality
Positive
Q2 adjusted EBITDA margin on net revenue reached 28.2%.
Short interest
Moderate
14% float short and 10.5 days to cover can amplify moves both ways.
Macro / utility budgets
Medium
Energy-efficiency and grid programs depend on utility and commercial capex cycles.
Analyst target gap
Positive
Recent target of $130 and consensus $137.50 create a public valuation anchor above base case.
Disclosure / governance
Low
No active securities class action, short-seller report or SEC investigation surfaced in recent searches.
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SWOT analysis

Strengths
  • +FY2026 targets imply strong EBITDA growth and high-20s adjusted EBITDA-to-net-revenue margin.
  • +Energy, grid reliability and data-center load create durable demand tailwinds.
Weaknesses
  • −Small-cap liquidity and 14% short float amplify drawdowns.
  • −Mantis purchase price makes the balance sheet less clean.
Opportunities
  • →Mantis opens commercial customers in data centers, healthcare and food/beverage.
  • →Q3 and Q4 earnings can close the discount to analyst targets.
Threats
  • !HSR or financing issues delay the Mantis close.
  • !Integration costs absorb apparent EBITDA accretion.
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Summary by assessment area

Quality - High
  • Revenue, EBITDA and EPS guidance are moving in the right direction.
  • FCF-positive profile supports a factor screen.
Balance sheet - Watch
  • Pre-deal net debt is manageable.
  • Mantis shifts focus to financing and integration discipline.
Catalysts - Near term
  • Q3 release, HSR clearance and Q4 close are sequential checkpoints.
  • Q4 guidance can reset FY2027 pro-forma expectations.
Sources & Disclaimer

Sources: Willdan Q2 2026 press release and Form 10-Q, Willdan Mantis acquisition release dated Sep 22, 2026, StockAnalysis price/statistics/financials pages, MarketBeat short-interest page, Benzinga analyst-target page, CompaniesMarketCap market-cap page, SEC Form 4 search snippets. Market data as of Sep 24, 2026: WLDN ~$79.63 close; market cap ~$1.21B; 52W range $64.67-$137.00; shares outstanding ~15.23M; short interest 2.01M shares / 13.99% float / 10.5 days to cover as of Sep 15, 2026. This document is for informational purposes only and does not constitute financial or investment advice.