Investar Holding Corp. (ISTR) - Due Diligence

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71OpportunityDD: May 29, 2026Analyst: 77

paidPrice at analysis date

USD 28.1 (29/05/2026)

domainMkt cap

$391M

pie_chartShares

13.9M

candlestick_chart52W

$17.89-$31.77

trending_downShort interest

2.3%

INFONASDAQFinancials410 employeesFounded 2006

Verdict: Attractive — Mispriced post-acquisition compounder

Louisiana-based community bank ($2.8B assets) trading at ~8.7x forward EPS and 1.0x book vs LA/TX peers at 12-14x. WFB acquisition closed Jan 2026 doubled Q1 net income YoY; NIM expanded 39 bps to 3.59%. Asymmetric risk/reward with hard tangible book floor at $22.72 and re-rating optionality to ~$34 base case (+21%).

📊 DIANALITICS RESEARCH INDEXCompany & Thesis Assessment Score /100 — updated 2026-05-29

Investar Holding Corp. (ISTR)

Community / Regional Bank · NASDAQ · Baton Rouge, LA

"Value compounder post-WFB: EPS doubled, multiple compressed, +21% base upside with hard book floor"

VALUE 8.7x fw P/E P/TBV 1.24x NIM +39 bps WFB integration risk CEO sold $733K Jan26

Fin. strength

/20 pts

EBITDA/FCF

/15 pts

Debt/leverage

/15 pts

Stage/business

/15 pts

Catalysts

/10 pts

Reg. risk

/8 pts

Risk/reward

/7 pts

Management

/5 pts

Sector/macro

/3 pts

Compliance

/2 pts

💡 Fair Value Estimate — Blended P/E forward (50%) + P/TBV (50%)

Fair value base case

USD 34.0

Range: USD 27.0-USD 42.0

Price at analysis date: USD 28.1 (29/05/2026)

Base upside/downside: +21%

Methodology: Blended P/E forward (50%) × P/TBV (50%) is the standard community-bank approach: P/E captures earnings power on the post-WFB run-rate, P/TBV anchors to the recapitalized capital base. Peer set restricted to LA/TX community banks $0.1-1B mkt cap. WFB synergy NPV (cost saves) and integration/credit haircuts add a ~$0 net adjustment. ⚠️ Not investment advice.

Component	Assumption	USD/share
P/E lens (50% weight)	10.5x × $3.23 FY26E EPS (peer median fw P/E ~12x, −1.5x integration discount)	+$33.92
P/TBV lens (50% weight)	1.50x × $22.72 TBV/sh Q1 2026 (peer median P/TBV ~1.4-1.6x for 12%+ ROTCE banks)	+$34.08
WFB cost-synergy NPV	25-30% cost saves on $40M WFB opex × tax-adj × 0.8 capture probability ÷ 14M shares	+$1.20
Integration / TBV dilution	3% TBV dilution at deal close + 18-month earn-back risk premium	−$0.70
Credit / CRE cycle reserve	8% Gulf Coast CRE exposure × 50 bps cycle provision haircut	−$0.50
Base case fair value	Blend: 0.5×$33.92 + 0.5×$34.08 + $1.20 − $0.70 − $0.50 = $34.00	≈ $34.00

Bull

$40–$42

Probability: 20%

WFB synergies fully captured by Q4 2026, EPS prints $3.47 (high end). Re-rating to peer fw P/E ~12x → $41.6. Triggered by Q2-Q3 2026 beats + FED rate cuts steepening curve.

Base

$32–$36

Probability: 55%

FY26 EPS $3.23 in line. Multiple expands modestly from 8.7x to 10.5x. Tangible book grows to $24 by year-end. Asymmetric to upside as integration de-risks.

Bear

$25–$27

Probability: 25%

CRE provisions spike (Gulf Coast hurricane / Texas energy), WFB integration slips, EPS prints $3.03 (low end). Floor near tangible book ($22.72) limits downside to ~10%.

Methodology: Methodology: Blended P/E forward (50%) × P/TBV (50%) is the standard community-bank approach: P/E captures earnings power on the post-WFB run-rate, P/TBV anchors to the recapitalized capital base. Peer set restricted to LA/TX community banks $0.1-1B mkt cap. WFB synergy NPV (cost saves) and integration/credit haircuts add a ~$0 net adjustment. ⚠️ Not investment advice. Not investment advice.

⚠️ Methodology note: Bank valuation uses blended P/E forward (50%) and P/TBV (50%). EV/EBITDA is not applicable to banks (no EBITDA construct). Capital adequacy and credit quality replace traditional leverage metrics in the score. "FATTORIALE [VALUE]" tag is a screen classification only — the DD that follows is built bottom-up from peer multiples and Q1 2026 fundamentals.

📊 Capital Structure · Short Interest · Buyback & Dilution

🟢 Short Interest

2.3%

282,792 shares short as of Mar 31, 2026 on ~13.9M outstanding. Low absolute level but +136.7% YoY and +40.7% vs Mar 15 — incremental skepticism, not crowded short.

🟡 Share dilution (1Y)

+39%

From ~10.0M to ~13.9M shares due to WFB acquisition (3.96M shares issued Jan 1, 2026). EPS-accretive net of synergies; TBV dilution 3% with ~18-month earn-back.

🟡 Buyback

Paused

No active repurchase in Q1 2026; capital prioritized for WFB integration. Dividend continues at ~$0.10/qtr (1.55% yield). Buyback restart contingent on synergy execution.

Short Interest — context

ISTR — 2.3%

2.3%

Insider activity (12M): CEO John D'Angelo sold 26,163 shares on Jan 27, 2026 for $732,825 ($27.87-$28.30) — option-exercise driven, not naked sale. CFO and COO had small tax-withholding dispositions only. Net signal: neutral-to-slightly-cautious; the CEO sale at $28+ caps near-term enthusiasm.

$Financial analysis — FY 2026E

Net Interest Margin

3.59%

+39 bps YoY (Q1 2026)

Q1 2026 EPS (diluted)

$0.77

+26% vs $0.69 consensus

Tangible Book / share

$22.72

−3.0% vs Q4 2025 (WFB dilution)

Forward P/E (FY26E)

8.7x

vs peer median ~12x

Item	FY2023	FY2024	FY2025	Q1 2026	Guidance FY2026E
Net Interest Income ($M)	67.4	74.5	82.5	32.7	~130–135
Total Revenue ($M)	74.1	82.3	91.4	35.6	~145–150
Net Income ($M)	11.2	10.4	21.5	12.0	~45
Diluted EPS ($)	1.13	1.06	2.19	0.77	3.03–3.47
Total Assets ($B)	2.7	2.7	2.8	3.5	~3.6
NIM (%)	2.85	3.05	3.20	3.59	~3.55–3.65
ROE (%)	4.2	4.0	7.4	~12.0	~16.0

Note: FY2025 figures partly estimated from H1 actuals + Q4 print ($23.5M revenue, $5.9M NI). Q1 2026 reflects first quarter post-WFB consolidation (closed Jan 1, 2026). FY2026E consensus midpoint EPS $3.23 implies ~4x EPS growth vs FY2024 — driven by acquisition + NIM expansion.

Quarterly dynamics — last 5 quarters
Metric	Q1 2025	Q2 2025	Q3 2025	Q4 2025	Q1 2026
Revenue ($M)	20.3	22.6	25.0	23.5	35.6
NIM %	3.20	3.25	3.30	3.20	3.59
Net income ($M)	6.3	4.5	4.8	5.9	12.0
End-of-period cash ($M)	180	175	165	190	240

Financial position and sustainability

CET1 capital ratio (est.)

~11.5%

Loan/deposit ratio

~88%

Non-performing loans %

~0.55%

Efficiency ratio (lower = better)

~62%

account_tree

Business model — Gulf Coast community bank with TX growth optionality

Three-state Gulf Coast platform, post-WFB scale-up

Investar Bank is a Louisiana-chartered commercial bank founded 2006 in Baton Rouge. As of Q1 2026 (post-WFB): ~$3.5B total assets, ~$2.6B loans, ~$2.9B deposits, ~410 employees across 35+ branches in Louisiana, Texas (Dallas/Wichita Falls), Alabama. Loan book is CRE-heavy (~50%), C&I (~25%), residential mortgage (~15%), consumer/other (~10%). Funded primarily by core deposits; reliance on brokered deposits limited. Strategy: organic growth in Gulf Coast + opportunistic Texas tuck-in M&A. WFB ($112.9M deal, Jan 2026) added Wichita Falls + Dallas footprint and 25-30% cost-save target.

gavel

Legal, regulatory and risk analysis

WFB integration execution

Moderate

$112.9M acquisition closed Jan 2026; synergy targets (25-30% cost saves) hinge on systems conversion and retention. ~18-month TBV earn-back. Miss on synergies = bear case trigger.

Gulf Coast CRE concentration

Moderate

~50% of loan book is commercial real estate, with Louisiana/Texas Gulf Coast exposure to hurricane risk and Texas oil & gas cyclicality. NPL still benign at ~0.55%, but cycle-sensitive.

CEO insider sale Jan 2026

Moderate

CEO D'Angelo sold 26,163 shares ($732K) at $27.87-$28.30 on Jan 27, 2026 — option-exercise driven. Not a red flag, but signals limited near-term upside conviction from the top.

Interest rate sensitivity

Low

Asset-sensitive balance sheet benefits from current "higher-for-longer" Fed stance. NIM expanded 39 bps YoY in Q1 2026. Downside if Fed cuts faster than expected, but consensus 50-75 bps of 2026 cuts already priced in.

Forward EPS clarity

Positive

FY26E EPS consensus $3.03-$3.47 with Q1 2026 already at $0.77 (annualized run-rate $3.08). Beat probability skewed positive: NIM tailwind + WFB integration progress + benign credit.

Tangible book floor

Positive

TBV/share $22.72 at Q1 2026; current price $28.09 = 1.24x P/TBV — limited downside without TBV impairment. Hard floor in any non-distressed scenario.

Small float / liquidity

Moderate

$391M market cap, ~13.9M shares, avg daily volume modest. Illiquidity premium argues against full peer-multiple convergence; mitigates with institutional accumulation post-Russell rebalance.

Regulatory / compliance

Low

No active SEC investigation, no class action, no shelf registration concerns identified in 12M lookback. Standard FDIC/Fed bank holding company supervision; CET1 healthy at ~11.5%.

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SWOT analysis

Strengths

+NIM expanded 39 bps to 3.59% in Q1 2026, well above community-bank median ~3.2%
+Q1 2026 EPS beat consensus by 26%, net income doubled YoY
+Tangible book $22.72/share provides hard floor at 1.24x P/TBV
+Disciplined M&A track record: WFB closed on time at sensible 1.4x TBV multiple
+Clean credit (NPL ~0.55%) and healthy capital (CET1 ~11.5%)

Weaknesses

−~50% CRE concentration with Gulf Coast hurricane / TX energy cycle exposure
−39% share dilution YoY from WFB stock-funded deal
−Sub-scale at $3.5B assets vs $5-10B regional peers; cost-to-income still ~62%
−Illiquid float limits institutional ownership; bid-ask penalty

Opportunities

→WFB synergies ($10-12M annual cost saves) phase in through 2H 2026 — direct EPS lift
→Texas expansion: Dallas + Wichita Falls open new C&I origination corridor
→Multiple re-rating from 8.7x to peer 11-12x = ~30% standalone upside
→Russell 2000 rebalance / small-cap rotation tailwind for 2H 2026

Threats

!Fed cuts faster than expected → NIM compression and earnings reset
!Texas CRE office stress or Gulf Coast catastrophic event triggering provisions
!Failed integration: cost saves slip, EPS misses $3.03 low end
!Insider selling cluster post-WFB lock-up expiry creates technical overhang

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Summary by assessment area

🟢 Financial risk — Low

CET1 ~11.5%, NPL 0.55%, NIM 3.59%
Q1 2026 EPS doubled YoY, beat by 26%
TBV $22.72/share = hard 1.24x floor

🟡 Execution risk — Moderate

WFB integration in flight, 18-month TBV earn-back
$10-12M synergy target needs proof in 2H 2026
CEO sale Jan 2026 caps short-term enthusiasm

🔵 Valuation — Attractive

8.7x fw P/E vs peer 12x = ~30% discount
Base FV $34 (+21%), bull $42, bear $26
Asymmetric R/R: ~3x upside vs downside

Sources & Disclaimer

Sources: SEC 10-Q Q1 2026 (filed 2026-05-08), 8-K Q1 2026 earnings (2026-04-20), 10-K FY2025 (filed 2026-03-16), WFB acquisition announcements (American Banker, Banking Dive), Form 4 insider filings (StockTitan). Market data — last verified close 2026-05-28: ISTR $28.09, market cap ~$391M, 52W: $17.89–$31.77, ~13.9M shares outstanding. Short interest 2.3% (Mar 31, 2026). Sources cross-checked: Yahoo Finance, NASDAQ.com, MarketBeat. ⚠️ This document is for informational purposes only and does not constitute financial or investment advice.