Investors sue Coastal Financial after one fintech partner erases $470M

A single fintech partner just blew a $68.8 million hole in Coastal Financial's balance sheet.

A Pennsylvania retirement fund has sued Coastal Financial Corporation and three top officers, alleging they concealed deteriorating credit quality in the company's banking-as-a-service program while selling millions in company stock.

The class action, filed October 2, 2026, in the US District Court for the Western District of Washington, alleges Coastal (NASDAQ: CCB) and its officers made "materially false and misleading statements" about the growth and risk management of the company's CCBX segment - its fintech partnership arm - over nearly two years.

Coastal, headquartered in Everett, Washington, runs its business through Coastal Community Bank, which has $4.48 billion in assets. Through CCBX, the company acts as the licensed bank behind digital financial brands, letting those partners offer banking products to their own customers. By June 30, 2026, CCBX loans had reached approximately $2.23 billion across 22 active partner relationships, according to the complaint.

The Allegheny County Employees' Retirement System brought the suit on behalf of investors who purchased Coastal stock between October 28, 2024 and July 29, 2026. The complaint alleges the company told investors, over and over, that CCBX growth was well managed. The filing quotes Coastal's CEO as saying the company was focused on "disciplined, sustainable expansion" and had "been intentional about how we grow, and that includes focusing on credit quality as portfolios mature."

The company also told investors it "remain[ed] fully indemnified against fraud and 98.8% indemnified against credit risk" with its CCBX partners, the complaint says.

Behind those assurances, the complaint alleges, a single CCBX partner's loan book - approximately $500 million, or nearly 23% of all CCBX loans - had "materially deteriorated." Coastal allegedly failed to tell investors.

The complaint says the truth came out on July 30, 2026, when Coastal reported a net loss of $42.1 million for the second quarter. The loss was driven primarily by a $68.8 million credit expense tied to that one partner. About $46 million of the expense came from writing down the value of a credit protection arrangement with the partner, and $22.8 million came from setting aside reserves against the partner's obligation to cover losses, according to the filing.

That same day, Coastal held its first-ever earnings call. The complaint quotes company leadership acknowledging the quarter included "significant and unusual items that warrant a direct explanation."

The stock dropped $30.75 per share - a 43.5% decline - closing at $39.91 and erasing approximately $470 million in market value, according to the complaint.

The complaint also alleges two of the three individual defendants sold significant amounts of stock while the allegedly misleading statements were being made. The filing says the CEO sold approximately $12 million in Coastal stock and a former CFO sold approximately $3.8 million during the class period.

Executive departures also figure into the complaint's case. The company's chief risk officer resigned in September 2025, according to the filing. One of the individual defendants stepped down as CFO in August 2026 - less than ten months into the role and just eight days before the credit expense was disclosed, the complaint says.

The lawsuit brings claims under federal securities law - specifically Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 - alleging the defendants made "untrue statements of material fact" and hid information that investors needed to make informed decisions.

For advisors and wealth managers who hold or recommend community bank stocks with fintech exposure, the case raises a sharp question: how reliable are partner indemnification agreements when the loans they cover go bad? The complaint alleges Coastal's repeated assurances about being "fully indemnified against fraud and 98.8% indemnified against credit risk" proved hollow when a single partner's $500 million book deteriorated.

The allegations have not been tested, and no court has ruled on the merits.