BANF Banks · Community bank · Oklahoma · Texas · Thesis updated July 1, 2026

Good bank, heavy real estate risk

BancFirst makes most of its money from lending funded by customer deposits.
Q1 2026 net interest margin was 3.74%, above the 3.70% watch line in the thesis.
Credit quality still looks clean, with nonaccrual loans at 0.72% of total loans.
The main risk is concentration: about 71% of loans were secured by real estate at year-end 2025.
Q1 loan growth was $51.4 million, and commercial real estate made up the largest increase.
The price question matters because the official valuation score is weak, even while operations look steady.

01 Running thesis

Steady bank, tighter risk

BancFirst is still doing the basic banking job well. In Q1 2026, net interest margin was 3.74%. That means the spread between what the bank earns on loans and securities and what it pays on funding stayed strong. Nonaccrual loans were 0.72% of total loans, the same level as year-end 2025.

The problem is where new loans are going. Total loans rose $51.4 million in Q1 2026, and commercial real estate was the largest increase. That keeps adding to the main bear case: too much exposure to one asset class.

Other real estate owned and repossessed assets also rose by $4.5 million in the quarter. OREO means property the bank took back after a borrower failed to pay. That does not yet break the story, but it makes the real estate risk more real.

The next year is simple to watch. BancFirst needs to keep net interest margin above 3.70%, keep nonaccrual loans below 0.75%, and show that loan growth is not mainly coming from commercial real estate. If OREO keeps rising, the clean headline credit numbers may lose some trust.

May 2026→Q1 2026 kept the core thesis intact. Net interest margin held at 3.74% and nonaccrual loans stayed at 0.72%, but commercial real estate led the $51.4 million loan increase and OREO rose by $4.5 million.

Feb 2026→The 2025 10-K showed better earnings and stable credit quality, with net income of $240.6 million and nonaccrual loans at 0.72% of total loans. The same filing sharpened the risk because real estate secured about 71% of loans and commercial real estate was the largest part of 2025 loan growth.

Nov 2025→The Q3 2025 filing supported both sides of the story. Net interest margin was 3.75% for the first nine months, while commercial real estate made up the largest part of year-to-date loan growth.

Aug 2025▼The Q2 2025 filing added pressure to the risk case. Commercial real estate made up more than total net loan growth in the first half, and one real estate loan drove a $3.7 million charge-off tied to OREO.

May 2025→The first thesis framed BancFirst as a well-run community-focused bank with stable margin and organic loan growth. The main watch items were real estate concentration, Oklahoma and Texas exposure, and growth from Texas segments.

02 Business model

Local lenders, deposit funding

BancFirst runs a super community bank model. Local managers have room to make lending and pricing choices for their own markets. The company tries to pair that local feel with more products than a small town bank could usually offer.

The main profit engine is net interest income. BancFirst gathers deposits from households, businesses, and public funds, then lends that money out through commercial, real estate, farm, residential, and consumer loans. In Q1 2026, net interest income was $127.6 million, up from $115.9 million in Q1 2025.

The model works best when deposits stay cheap and credit losses stay low. It breaks if customers move cash into higher-cost accounts faster than loan yields rise, or if real estate borrowers start missing payments. The bank's Oklahoma and Texas focus also ties it to local business cycles, including energy prices.

03 Product portfolio

What the bank sells

Steady

Commercial and industrial loans

These loans serve operating businesses. They help deepen customer ties, but demand can slow when local firms pull back.

Growth engine

Commercial real estate loans

This is a major source of recent loan growth. It also carries the clearest risk because more of the book is tied to property values and rent trends.

Option

Construction and development loans

These loans can grow when local building markets are healthy. They can also sour fast when projects stall or collateral values fall.

Steady

Consumer, residential, and agricultural loans

These products round out the bank's local lending base. They make BancFirst useful to households, farms, and smaller local borrowers.

Cash cow

Deposit accounts

Checking, savings, money market accounts, and time deposits fund the bank. The value of this base depends on how much customers demand in interest.

Steady

Trust, wealth, insurance, and cash management

These services add fee income beyond lending. In Q1 2026, noninterest income was $51.4 million, helped by trust revenue, service charges, treasury income, and securities transactions.

04 Business segments

Oklahoma core, Texas add-on

BancFirst Oklahoma banking platform83%modest

Pegasus and Worthington Texas banking platforms17%modest

The latest Q1 2026 filing states that 83% of loans are held by BancFirst and 17% by Pegasus and Worthington. The company also reports six business units, but this mix uses the pinned loan split from the filing because a full profit mix was not available in the loaded source text.

05 Risk factors

What could go wrong

Commercial real estate keeps taking share

High impact · High odds

Real estate is the main concern. The 2025 filing said about 71% of loans were secured by real estate, and Q1 2026 loan growth was led by commercial real estate. A weak property market could push losses higher even if today's nonaccrual ratio looks low.

We watchCommercial real estate growth as a share of total loan growth, plus any office, retail, or multifamily detail from management.

OREO becomes a warning sign

Medium impact · Medium odds

Other real estate owned rose by $4.5 million in Q1 2026. OREO means the bank has taken back property tied to a bad loan. More OREO can bring write-downs, upkeep costs, and lower sale prices.

We watchOREO balance and net expense from other real estate owned each quarter.

Deposit costs squeeze the spread

High impact · Medium odds

BancFirst depends on the gap between asset yields and funding costs. If customers shift from noninterest-bearing deposits into higher-rate accounts, net interest margin could fall. The thesis watch line is net interest margin above 3.70%.

We watchNet interest margin, noninterest-bearing deposits, and interest-bearing deposit costs.

Local economy turns against borrowers

Medium impact · Medium odds

BancFirst is focused on Oklahoma and Texas. Those markets can be affected by energy prices, local business spending, and real estate demand. A downturn could hit loan growth and credit quality at the same time.

We watchOil and natural gas price trends, Oklahoma and Texas job data, and nonaccrual loans as a share of total loans.

Expense growth lowers efficiency

Medium impact · Medium odds

Q1 2026 noninterest expense rose to $96.8 million from $92.2 million a year earlier. Salaries and employee benefits were the main driver, rising by $4.3 million. If that is a new run-rate, earnings growth may be harder to sustain.

We watchSalaries and employee benefits, total noninterest expense, and any ABOK conversion costs.

06 Quick answers

In one breath

What does BancFirst Corporation do?

BancFirst is a bank holding company. It offers lending, deposits, trust, wealth, insurance, cash management, and other financial services mainly in Oklahoma and Texas.

Why is commercial real estate such a big issue for BANF?

A large share of BancFirst's loan book is secured by real estate. The 2025 filing said the share was about 71%, and Q1 2026 loan growth was led by commercial real estate. That makes the bank more exposed if property values or rents weaken.

What is the most important metric to watch for BANF?

Net interest margin is key because it shows the bank's lending spread. The current thesis also watches nonaccrual loans below 0.75% and whether OREO stops rising.

Is BancFirst growing fast?

Growth looks modest. Loans rose $51.4 million in Q1 2026, or 0.6% from year-end 2025, while total assets were $15.1 billion at March 31, 2026.