Filings Radar

SEC 8-K and 6-K filings classified by Claude with reasoning, plus Form 4 insider transactions. Ingested from EDGAR’s filing stream in near-real time, reconciled overnight.

WESTERN DIGITAL CORP (WDC)

CIK 0000106040 5 material events

Insider activity (SEC Form 4)

Open-market buys and sells only — the deliberate trades. Zero here doesn’t mean no filings: grants, option exercises and tax withholding (below) are compensation, not market trades.

Open-market · last 30 days: 0 buyers bought $0 3 sellers sold $4.7M
Open-market · last 90 days: 0 buyers bought $0 5 sellers sold $15.8M
InsiderRoleDateTransactionSharesValue
Gubbi Vidyadhara K Chief of Global Operations 2026-09-04 Open-market sell 1795 $825K
Tregillis Cynthia L Chief Legal Officer & Corp Sec 2026-09-04 Open-market sell 10b5-1 432 $195K
Davis Brian Scott Chief Sales & Mrktng Officer 2026-09-03 Option exercise 7 $0
Davis Brian Scott Chief Sales & Mrktng Officer 2026-09-03 Tax withholding 882 $389K
Gubbi Vidyadhara K Chief of Global Operations 2026-09-03 Option exercise 14 $0
Gubbi Vidyadhara K Chief of Global Operations 2026-09-03 Tax withholding 1764 $779K
Tregillis Cynthia L Chief Legal Officer & Corp Sec 2026-09-03 Option exercise 10b5-1 7 $0
Tregillis Cynthia L Chief Legal Officer & Corp Sec 2026-09-03 Tax withholding 10b5-1 700 $309K
STREETER STEPHANIE A Director 2026-09-01 Open-market sell 1600 $728K
Tan Irving Chief Executive Officer, Director 2026-09-01 Gift 112500 $0
Tan Irving Chief Executive Officer, Director 2026-09-01 Gift 112500 $0
STREETER STEPHANIE A Director 2026-08-31 Open-market sell 2000 $894K
STREETER STEPHANIE A Director 2026-08-31 Open-market sell 2000 $897K
Tan Irving Chief Executive Officer, Director 2026-08-31 J 112500 $0
Tan Irving Chief Executive Officer, Director 2026-08-31 J 112500 $0
Tregillis Cynthia L Chief Legal Officer & Corp Sec 2026-08-27 Open-market sell 10b5-1 1007 $482K
Davis Brian Scott Chief Sales & Mrktng Officer 2026-08-26 Option exercise 7 $0
Davis Brian Scott Chief Sales & Mrktng Officer 2026-08-26 Tax withholding 1644 $771K
Gubbi Vidyadhara K Chief of Global Operations 2026-08-26 Option exercise 9 $0
Gubbi Vidyadhara K Chief of Global Operations 2026-08-26 Tax withholding 2056 $964K
Most recent 20 reported transactions. Open-market buys (P) and sells (S) are the deliberate ones; grants and option exercises are compensation. Not investment advice.

Risk Radar (year-over-year Risk Factors)

← All Risk Radar

Fiscal period ending 2026-07-03 versus 2025-06-27view filing on EDGAR →

Revenue concentration risk intensified sharply — cloud customers now represent 89% of revenue and the top 10 customers 73% — while new disclosures across AI regulatory exposure, geopolitical supply-chain threats, and customer consolidation risk collectively broaden the risk profile. Fixed-price long-term contracts add execution and opportunity-cost risk on top of the concentration dynamic. The sole easing — convertible note settlement flexibility — is a meaningful but contained offset against a materially wider worsening picture.

5 company-specific · 1 eased/removed · 1 common-mode

Company-specific changes

New

New disclosure of material long-term customer contracts with fixed/formula pricing that limit pricing flexibility, create execution risk, and expose company to opportunity costs and potential revenue loss if unable to perform or if customers breach.

Long-term agreements expose us to certain execution, financial, and market risks, which could be significant. We have entered into long-term agreements with certain customers that commit us to…

Revised

Revenue concentration worsened: Cloud revenue increased 88% to 89%, top 10 customers increased 68% to 73%. New AI-related demand risk disclosed.

BUSINESS AND OPERATIONAL RISKS Loss of revenue from Cloud or other key customers could harm our operating results. There is significant revenue concentration in our Cloud end market and among our top…

Revised

Added specific risks: cloud-to-on-premises shift reducing data center demand, gross margin pressure from manufacturing yields, customer base concentration shift to neocloud, and governmental competition subsidies.

If we do not properly manage technology transitions and product development and introduction, our competitiveness and operating results may be negatively affected. The markets for our products…

Revised

Added specific geopolitical risks: Iran/Middle East conflict disrupting logistics, China's rare earth export restrictions, state-sponsored cybersecurity threats, and government relationship management failures.

MACROECONOMIC AND INDUSTRY RISKS Adverse global or regional conditions could harm our business. A large portion of our revenue is derived from our international operations, and many of our products…

Revised

New disclosure of customer consolidation risk with specific impacts: pricing leverage, reduced demand, product replacement, order cancellations.

Our industry is subject to variations in demand, pricing and competitive factors, which can negatively impact our business. Demand for and prices of our products are influenced by, among other…

Eased / removed

Revised

Convertible notes settlement terms relaxed: prior year required cash-only settlement; this year permits cash, stock, or combination at company's election, reducing immediate liquidity pressure.

FINANCIAL RISKS Our incurrence of additional debt may negatively impact our liquidity, restrict our operations and ability to respond to business opportunities, and increase our vulnerability to…

Also disclosed — common-mode (AI regulatory compliance)
AI regulatory compliance New

New disclosure of material AI risks: regulatory compliance uncertainty, IP infringement exposure, data security/privacy breaches, reputational harm, and potential demand impact from environmental/regulatory constraints on AI infrastructure.

We may be adversely affected by the risks, challenges, and evolving regulatory landscape associated with the use of AI in our operations, product development, and business practices. We are…

Fiscal period ending 2025-06-27 versus 2024-06-28view filing on EDGAR →

Post-separation, the company is a smaller, less diversified entity with materially elevated customer concentration (88% Cloud revenue, three 10%+ customers), new strategic partnership dependencies, and compounding technology execution risk from HAMR transition and generative AI uncertainty. Tariff/trade-war exposure, convertible note conversion pressure, and expanded tax risk (Pillar Two + One Big Beautiful Bill) add further near-term stress. Operational improvements — lower unabsorbed overhead, reduced inventory write-downs — and the resolution of separation-related debt covenant risk provide partial offset but do not change the net worsening trajectory.

7 company-specific · 4 eased/removed · 4 common-mode

Company-specific changes

Revised

Separation completed; now faces post-spin risks: smaller/less diversified company, retained Sandisk equity stake, ongoing tax uncertainty, and execution challenges with material adverse effect potential.

BUSINESS AND STRATEGIC RISKS We are subject to risks related to the separation of Sandisk, our former Flash business, into an independent public company. On February 21, 2025, we completed our…

Revised

Post-Separation, Cloud end market now 88% of revenue; top 10 customers 68% of revenue with three at 10%+ each. Materially increased customer concentration and dependency risk.

Loss of revenue from the Cloud end market or a key customer, or consolidation among our customer base, could harm our operating results. As a result of the Separation, there is increased revenue…

Revised

Added specific HAMR technology transition risk and new generative AI market uncertainty. Escalates technology execution risk with concrete near-term challenges.

If we do not properly manage technology transitions and product development and introduction, our competitiveness and operating results may be negatively affected. The markets for our products…

Revised

Company disclosed a recent "Separation" (divestiture) and now explicitly references post-Separation integration risks and past disruptions, escalating the materiality of execution risk.

Failure to successfully execute on strategic initiatives including acquisitions, divestitures or cost saving measures may negatively impact our future results. We have made and expect to continue to…

Revised

Convertible notes now triggered for conversion; previously unconditional, now conditional on stock price. Increased near-term liquidity pressure and cash settlement risk.

FINANCIAL RISKS Our level of debt may negatively impact our liquidity, restrict our operations and ability to respond to business opportunities, and increase our vulnerability to adverse economic and…

Revised

Added flash memory competition threat, hyperscale customer dependency, distribution channel risks, and government relationship management as new material competitive pressures.

We participate in a highly competitive industry that is subject to variations in average selling prices (“ASPs”) and demand, technological change and lengthy product qualifications, all of which…

New

New disclosure of material strategic partnership risks: partner non-compliance, technology loss, financial failure, bankruptcy, and operational disruptions affecting product development and manufacturing.

Our strategic relationships subject us to risks and uncertainties that could harm our business. We have entered into and expect to continue to enter into strategic relationships with various partners…

Eased / removed

Removed

Removal of separation risk factor indicates the separation was completed or abandoned, resolving a material strategic and operational risk that previously threatened business continuity and shareholder value.

Our review of the Separation has and will continue to involve significant time, expense and resources and could disrupt or adversely affect our business. Executing the Separation has required and…

Removed

Removal of separation risk indicates transaction completed or abandoned. Material change: debt covenant risks, refinancing uncertainty, and leverage concerns from separation no longer apply.

The Separation may not achieve the anticipated benefits and could expose us to new risks, including with respect to our existing indebtedness and future capital structure. We may not realize any…

Revised

Unabsorbed overhead charges declined 23% ($407M to $155M). Inventory write-downs removed from disclosure. Risk of excess capacity utilization eased materially.

We experience variability in our sales and cyclicality in our industry, which could cause our operating results to fluctuate. In addition, accurately forecasting demand is difficult, which could harm…

Removed

Removal of material distribution and retail channel risk disclosure. Company no longer emphasizes vulnerability to channel shifts, retail partner failures, or brand reputation damage in these channels.

Sales in the distribution channel and to the retail market are important to our business, and if we fail to respond to demand changes within these markets, or maintain and grow our applicable market…

Also disclosed — common-mode (Tariffs trade policy, Global tax reform pillar two, Geopolitical macro uncertainty, AI regulatory compliance)
Tariffs trade policy New

Newly disclosed material risk: tariffs and trade policy changes threaten cost structure, pricing power, supply chain, and capital availability. Substantive business impact.

Changes in U.S. trade policy and the impact of tariffs and retaliatory actions may have a material adverse effect on our business and results of operations. Our business, financial condition and…

Global tax reform pillar two Revised

New disclosure of One Big Beautiful Bill Act 2025 with material tax impact uncertainty; expanded Pillar Two adoption risk across jurisdictions; heightened tax exposure.

Tax matters may materially affect our financial position and results of operations. Changes in tax laws in the United States, the European Union and around the globe have impacted and will continue…

Geopolitical macro uncertainty Revised

Added explicit "trade wars" language and supply chain disruption risks from public health crises, escalating geopolitical and operational risk disclosure.

OPERATIONAL RISKS Adverse global or regional conditions could harm our business. A large portion of our revenue is derived from our international operations, and many of our products and components…

AI regulatory compliance Revised

New disclosure of AI-related privacy and security risks, including ethical concerns and flawed outcomes. Reflects emerging regulatory focus on AI governance.

LEGAL AND COMPLIANCE RISKS We are subject to laws, rules and regulations relating to the collection, use, sharing and security of data, including personal data, and our failure to comply with these…

Material year-over-year changes to this company's Risk Factors (Item 1A), found by comparing each annual report to the prior year, judged for materiality, and classified as company-specific or common-mode against the cross-company catalog. Common-mode changes are the macro themes many companies disclose in common; they are collapsed above. A filing marked unchanged had no material change from the prior year; its summary describes the company's standing risks, which remain in force. Fiscal periods are the reporting period ends. Not investment advice.

M&A activity

8-K filed 2026-08-26 confidence 85% Item 8.01

Western Digital entered into exchange agreements to retire approximately $191.0 million in convertible notes through a combination of cash ($192.7 million) and equity issuance (Exchange Shares). The transaction materially restructures the company's capital structure by converting debt obligations into equity.

View raw filing on EDGAR →

Earnings release

8-K filed 2026-08-05 confidence 99% Item 2.02

Western Digital announced fiscal Q4 and full-year 2026 financial results on August 5, 2026, with a press release attached as Exhibit 99.1. The disclosure includes detailed GAAP and non-GAAP financial statements showing revenue of $3.75 billion (up 44% YoY), diluted EPS of $8.21 (GAAP) and $3.56 (non-GAAP), along with forward guidance for Q1FY27. This is a standard earnings release disclosure under Item 2.02.

View raw filing on EDGAR →

M&A activity

8-K filed 2026-06-11 confidence 85% Item 8.01

Western Digital entered into exchange agreements to swap 1,038,681 shares of SanDisk stock for shares of its own common stock held by institutional investors. This constitutes a material disposition of a significant equity stake (over 1 million shares) in a subsidiary/affiliate, which qualifies as M&A activity under Item 1.01/2.01 framework. The transaction involves a material change in the company's asset composition and shareholder base.

View raw filing on EDGAR →

Dilutive issuance

8-K filed 2026-06-03 confidence 85% Item 3.02

Western Digital entered into exchange agreements to retire approximately $858.4 million in convertible notes through a combination of cash and equity issuance (Exchange Shares), relying on Section 4(a)(2) exemption for the unregistered sale of equity securities.

View raw filing on EDGAR →

Exec appointment

8-K filed 2026-05-28 confidence 95% Item 5.02

The Board of Western Digital unanimously appointed Manuvir Das as a director and Audit Committee member on May 26, 2026. This appointment affects the company's corporate governance and oversight structure.

View raw filing on EDGAR →