TransDigm Co-Chief Operating Officer Joel Reiss Sells 414 Shares in Stock Transactions

Executive Equity Activity at TransDigm

Joel Reiss, who serves as Co-Chief Operating Officer at TransDigm Group Inc., executed multiple stock sales totaling 414 shares on July 15, 2026. The transactions occurred through four separate sales events on the same date, with share prices varying across each transaction. Reiss maintained his officer position throughout the reporting period and continues to hold direct beneficial ownership in the company following the sales activity.

TransDigm Group operates as a leading supplier of aerospace and defense components and systems, serving commercial aerospace, defense, and aftermarket segments. The company's portfolio includes mechanical and electromechanical components, interior and exterior aircraft products, and integrated solutions for the aerospace industry. Insider transactions at TransDigm, including those by executive officers, are monitored by investors as potential indicators of management's confidence levels regarding the company's valuation and near-term prospects.

Details of the July 15, 2026 Stock Transactions

The disclosure indicates that Reiss executed four separate stock sales on July 15, 2026. The first transaction involved the sale of 190 shares at a weighted average price of $1,230.0563 per share, with individual sales within a range of $1,229.66 to $1,230.54. The second transaction consisted of 70 shares sold at a weighted average price of $1,231.0943 per share, with prices ranging from $1,230.88 to $1,231.48. These varied price points suggest that the sales were executed across different times during the trading day or through different order execution methods.

The third transaction involved the sale of 144 shares at a weighted average price of $1,232.3369 per share, with prices spanning from $1,231.99 to $1,232.83. The fourth and final transaction on that date consisted of 10 shares sold at $1,233.38 per share. In aggregate, the four transactions resulted in the disposition of 414 common shares. Following these sales, Reiss's direct beneficial ownership position in TransDigm stood at 3,600 shares, indicating that the executive retained a substantial equity stake in the company despite the sales activity.

Reporting Procedures and Filing Timeline

The disclosure filed on July 17, 2026, represents the second of two separate reports submitted by Reiss for the same transaction. This filing approach was necessitated by a 30-line item limitation in Table I of the standard insider transaction reporting form. Rather than consolidating all transaction details into a single report, the reporting person's representatives submitted two sequential reports to accommodate the technical constraints of the disclosure format while ensuring complete transparency regarding all equity transactions executed on July 15, 2026.

The delay between the transaction execution date of July 15 and the filing date of July 17 reflects standard regulatory timelines for insider transaction reporting. Rachel L. Quinlan, acting as attorney in fact for Joel Reiss, signed the disclosure on behalf of the reporting person. This representation arrangement is common practice when insider officers authorize legal representatives to manage and file required ownership change disclosures with regulators.

Beneficial Ownership Structure and Direct Holdings

The reporting indicates that all securities sold and retained by Reiss are held in direct beneficial ownership form rather than through indirect arrangements or held-by-proxy structures. Direct beneficial ownership means that Reiss has immediate rights to the securities and direct control over voting and disposition decisions. After the July 15 transactions, the executive's directly owned stake totaled 3,600 shares, representing his ongoing economic interest in TransDigm's equity performance.

The nature of direct beneficial ownership distinguishes Reiss's holdings from potential indirect ownership structures, such as securities held through family trusts, partnerships, or other entities. Regulatory disclosure requirements mandate clear delineation between direct and indirect ownership positions to provide investors and market participants with transparent information about the extent to which company insiders maintain personal equity stakes in their organizations.

Insider Trading Context in the Aerospace and Defense Sector

TransDigm operates within the aerospace and defense components industry, a sector characterized by long-term government contracts, aftermarket support revenue streams, and exposure to commercial aircraft production cycles. Executive-level stock transactions in this sector are often scrutinized by investors as indicators of management views on company valuation, industry conditions, and operational momentum. The timing and scale of insider equity sales can provide context regarding management's assessment of current and near-term business performance.

The aerospace and defense industry experienced significant market fluctuations and production adjustments during the 2026 period, following recovery from previous pandemic-related disruptions and supply chain challenges. Insider transactions during this period reflect executive decision-making in response to market conditions, company performance metrics, and individual financial planning considerations. TransDigm's position as a key supplier to major aircraft manufacturers and defense programs positions executive compensation and equity ownership as central elements of the company's competitive talent strategy.

Previous Transaction Reporting and Disclosure Obligations

The notation in the filing that this report represents the second of two submissions for the same transaction emphasizes the practical constraints of federal insider transaction reporting systems. The 30-line limitation on Table I entries necessitates that transactions with numerous individual price points or execution details be split across multiple filings when they exceed available space in a single form. This procedural requirement reflects the standardization requirements of electronic disclosure systems while maintaining the integrity and completeness of reported ownership changes.

Insiders subject to Section 16 reporting obligations must disclose beneficial ownership changes within two business days of the transaction's execution. These disclosure requirements apply to officers, directors, and principal shareholders of publicly traded companies and are designed to provide transparency to the investing public regarding the equity stakes and trading activity of company insiders. Joel Reiss's status as Co-Chief Operating Officer places him directly under these mandatory reporting obligations.

Weighted Average Pricing Methodology in Insider Sales

The reporting discloses that Reiss's sales were executed at varying prices within defined ranges, with the form providing weighted average figures and ranges for each transaction. This approach reflects typical market execution patterns where large sell orders may be filled across multiple price levels as market conditions fluctuate throughout the trading day. The weighted average prices presented in the disclosure ($1,230.0563, $1,231.0943, $1,232.3369, and $1,233.38) represent the actual average prices at which the shares were disposed of across each transaction grouping.

The ranges provided in the explanatory footnotes demonstrate the price variation that occurred during each sale transaction. For the 190-share transaction, prices ranged from $1,229.66 to $1,230.54, a spread of approximately 88 cents. For the 70-share transaction, the range spanned from $1,230.88 to $1,231.48, approximately 60 cents. The 144-share transaction exhibited a range from $1,231.99 to $1,232.83, approximately 84 cents. These modest price ranges are typical for large-cap equity transactions executed during standard market hours.

Implications for Investor Analysis and Monitoring

Insider transactions by company officers represent data points that investment analysts and portfolio managers may incorporate into their evaluation frameworks. The sale of 414 shares by TransDigm's Co-Chief Operating Officer, while representing a relatively modest percentage of his retained holdings, constitutes a reportable transaction subject to public disclosure and investor scrutiny. The transaction occurred at share prices in the $1,230 range, reflecting TransDigm's trading activity during mid-July 2026 in what represents a significant valuation level for the company's equity.

Investors monitoring TransDigm may consider the context and frequency of insider transactions as one factor among numerous considerations when evaluating the company's investment merit. Executive equity sales can reflect individual diversification decisions, personal financial planning, or responses to compensation planning cycles rather than signals regarding management's outlook. The retention of 3,600 shares by Reiss following these sales suggests continued alignment between the executive's personal interests and shareholder interests through retained equity ownership.

Regulatory Framework Governing Insider Ownership Disclosures

The disclosure was filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, which governs beneficial ownership reporting requirements for company insiders. Under Section 16 of the Securities Exchange Act, officers, directors, and beneficial owners of more than 10 percent of a company's equity securities must report changes in their ownership positions within specified timeframes. These reporting obligations exist to provide public investors and market participants with transparency regarding the equity stakes and trading activity of individuals with access to material nonpublic information and fiduciary responsibilities to the company.

The reporting person's undertaking to provide detailed information regarding the specific prices at which shares were sold at each separate price point reflects the comprehensive documentation requirements that accompany insider transaction reporting. This level of detail provides the Securities and Exchange Commission, the company, and security holders with the ability to verify transaction details and understand the full scope of insider equity activity. The regulatory framework balances the need for timely public disclosure with reasonable accommodation for the practical mechanics of executing large securities transactions.