Why Is Nidec Stock Plunging Today? PwC Audit Disclaimer Raises Delisting Fears

Nidec stock is plunging today after the Japanese motor manufacturer’s auditor, PwC Japan, declined to express an opinion on its financial statements for the fiscal year ended March 2026. The development has intensified concerns about Nidec’s accounting scandal, internal controls and the future of its Tokyo Stock Exchange listing.

Nidec shares fell as much as 18% to ¥1,888 during Thursday’s trading session, extending a severe sell-off that has already hit the company in recent days. The immediate trigger was the auditor’s refusal to sign off on the company’s accounts, while a huge impairment charge and record annual loss added to investor concerns.

The Main Reason Nidec Stock Is Falling

The biggest issue is the audit disclaimer from PwC Japan.

A disclaimer of opinion means the auditor was unable to obtain sufficient appropriate evidence to express an audit opinion on the financial statements. For Nidec, this is particularly serious because the company has already been dealing with accounting irregularities and weaknesses in its internal controls.

Investing.com reported that PwC declined to express an opinion for the third consecutive time, directly increasing concerns about Nidec’s ability to maintain its Tokyo Stock Exchange listing.

Nidec was already designated a Security on Special Alert by the Tokyo Stock Exchange in October 2025. The exchange said the designation followed a disclaimer of opinion attached to Nidec’s annual securities report and concerns about the company's internal management system.

The JPX still lists Nidec under the special-alert category, with the company classified as being in the process of making improvements.

Record Loss Makes the Situation Worse

The audit problem arrived alongside extremely weak financial results.

Nidec reported a net loss attributable to owners of the parent of about ¥564.6 billion for the fiscal year ended March 2026, compared with a profit of approximately ¥84.7 billion in the previous year.

The company also recorded ¥632.1 billion of impairment losses, contributing heavily to the dramatic reversal in profitability.

An impairment charge is an accounting reduction in the value of assets when their expected economic value has fallen. It does not necessarily represent an equivalent immediate cash outflow, but it can signal that previous investments or business expectations have deteriorated significantly.

For investors, the scale of Nidec's impairment is important because it indicates that some parts of the company's business are worth substantially less than previously recorded.

Automotive Motor Business Under Pressure

A major part of the impairment is connected with Nidec's automotive and commercial-products businesses.

The company has invested heavily in electric-vehicle motor technology, but the EV market has not developed at the pace or profitability that many suppliers had expected. Nidec has also faced difficult conditions in China's household-appliance motor market.

The combination has forced Nidec to reassess the value of assets associated with these businesses. The resulting impairment helped push the company into its record annual loss.

This creates a second problem for shareholders: the market is no longer evaluating Nidec only on its historical growth record. Investors are now questioning the quality of previous investments, future profitability and management's ability to allocate capital effectively.

Accounting Scandal Remains at the Center of the Crisis

The latest share-price decline cannot be separated from Nidec's broader accounting scandal.

Investigations into inappropriate accounting practices have been ongoing for more than a year. Nidec's own disclosures say investigations found accounting misconduct and errors at multiple locations across the group.

The Tokyo Stock Exchange has also taken formal action. In April 2026, the exchange imposed a listing-agreement violation penalty, saying that inappropriate accounting practices occurred across a wide range of Nidec group locations and that serious internal-control deficiencies persisted for an extended period.

That history makes the latest audit disclaimer more significant than it would be for a company without an ongoing governance problem.

Investors are effectively being asked to trust financial numbers while the auditor says it has not been able to obtain enough evidence to provide an opinion. That uncertainty can make valuation extremely difficult.

Why the Delisting Risk Matters

One of the most important concerns surrounding Nidec stock is the possibility of delisting from the Tokyo Stock Exchange.

Nidec's special-alert designation was originally connected to the company's audit and internal-control problems. Under the exchange's process, companies designated as Securities on Special Alert are required to improve their internal management systems. The exchange subsequently evaluates whether those systems have been adequately developed and implemented.

Importantly, Nidec has not been announced as delisted. The current JPX information still identifies it as a company making improvements rather than a stock already designated for delisting.

Nevertheless, the continued audit problems increase uncertainty about the outcome of the exchange's review.

For shareholders, a potential delisting would represent a major change in liquidity, market access and the way the company's shares are traded. It is therefore understandable that the possibility is being reflected in the stock price.

Management Changes Add Another Layer of Uncertainty

Nidec is also undergoing a leadership transition.

President and CEO Mitsuya Kishida resigned, with Chief Technology Officer Michio Kaida taking over as president and CEO. The leadership change came amid the accounting scandal and just before the delayed annual financial results.

The company's founder, Shigenobu Nagamori, has also stepped away from leadership roles during the crisis. Reuters reported in February that Nagamori resigned as chairman emeritus after earlier leaving the board amid the investigation into accounting improprieties.

For investors, the new management team now faces two simultaneous challenges: rebuilding confidence in financial reporting and restoring the profitability of businesses that have suffered large impairments.

What This Means for Nidec Investors

The current situation is different from a normal earnings disappointment.

Nidec's stock decline reflects several interconnected risks:

• Audit uncertainty: PwC has not provided an opinion on the latest financial statements.

• Governance risk: The company remains under the Tokyo Stock Exchange's special-alert framework.

• Accounting risk: Past financial statements have required investigation and corrections.

• Business risk: Large impairments show weakness in important operations.

• Management risk: Nidec is operating under new leadership during a major restructuring.

• Listing risk: Continued deficiencies could affect the company's status on the exchange.

The key distinction is between the company's underlying operating business and the credibility of its financial reporting. Even if Nidec's motors and other products remain commercially valuable, investors need reliable financial information to determine what those operations are worth.

What Investors Should Watch Next

The next developments could be more important than the one-day share-price movement.

Investors should monitor:

1. Tokyo Stock Exchange review: Any announcement regarding Nidec's special-alert designation could have a major impact on the stock.

2. Audit developments: Investors will want to know when PwC can obtain sufficient evidence to issue an audit opinion.

3. Internal-control reforms: Nidec needs to demonstrate that the weaknesses identified during the investigation have been addressed in practice, not simply through announced policies.

4. Business restructuring: How management handles underperforming automotive and commercial businesses will determine whether further impairments are required.

5. Profit recovery: After the record loss, investors will eventually look for evidence that Nidec can return to sustainable operating profitability.

6. Management credibility: The new leadership team's ability to restore confidence will be closely watched.

Bottom Line

Nidec stock is plunging today primarily because PwC Japan declined to express an audit opinion on the company's fiscal 2026 financial statements, reinforcing concerns surrounding its accounting scandal and potential listing risks. The impact is compounded by Nidec's ¥632.1 billion impairment charge and ¥564.6 billion annual net loss.

The immediate market reaction is therefore about more than weak earnings. Investors are dealing with uncertainty over financial reporting, corporate governance, business restructuring and the company's future status on the Tokyo Stock Exchange.

The crucial developments from here will be the audit process, Nidec's internal-control reforms and the Tokyo Stock Exchange's assessment of whether those reforms are sufficient.

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This article is for informational and educational purposes only and should not be considered investment advice.