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Exhibit 99.1

TransDigm Group Reports Fiscal 2026 Fourth Quarter and Year-End Results

Cleveland, Ohio, November 10, 2026/PRNewswire/ -- TransDigm Group Incorporated (NYSE: TDG), a leading global designer, producer and supplier of highly engineered aircraft components, today reported results for the fourth quarter ended September 30, 2026.

Fourth quarter highlights include:

•Net sales of $2,988 million, up 23% from $2,437 million in the prior year's quarter;

•Earnings per share of $10.33, up 33% from $7.75 in the prior year's quarter;

•EBITDA As Defined of $1,583 million, up 20% from $1,320 million in the prior year's quarter; and

•Adjusted earnings per share of $12.44, up 15% from $10.82 in the prior year's quarter.

Quarter-to-Date Results

Net sales for the quarter increased 23%, or $551 million, to $2,988 million from $2,437 million in the comparable quarter a year ago. Organic sales growth as a percentage of net sales was 14%.

Net income for the quarter was $586 million, a decrease of $23 million, or 4%, compared to $609 million in the comparable quarter a year ago. The decrease in net income primarily reflects higher interest expense as a result of the increase in TransDigm's year-over-year gross debt balance and higher tax expense. The decrease was offset by the increase in net sales as described above and the application of our operating strategy.

Adjusted net income for the quarter increased 12% to $706 million, or $12.44 per share, from $629 million, or $10.82 per share, in the comparable quarter a year ago.

EBITDA for the quarter increased 13% to $1,436 million from $1,269 million for the comparable quarter a year ago. EBITDA As Defined for the quarter increased 20% to $1,583 million compared with $1,320 million in the comparable quarter a year ago. EBITDA As Defined as a percentage of net sales for the quarter was 53.0%, which included approximately two percentage points of dilution from recent acquisitions, compared with 54.2% in the comparable quarter a year ago.

Acquisition Activity

As previously announced on September 28, 2026, TransDigm completed the acquisition of Prince & Izant ("P&I") for approximately $1.07 billion in cash, including certain tax benefits. P&I is a global designer and manufacturer of highly engineered brazing alloys and specialty metal components used across a range of advanced performance and high cost-of-failure applications. P&I primarily supports the aerospace and defense, aeroderivative turbine, and transportation end markets. Additionally, but to a lesser degree, P&I serves the medical and general industrial end markets.

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Financing Activity

During the quarter, on September 28, 2026, TransDigm successfully completed a private offering of $3.0 billion of new 6.75% Senior Secured Notes maturing January 2035. TransDigm used the net proceeds of the offering of the 2035 Senior Secured Notes to repurchase approximately $1.8 billion of its $2.1 billion outstanding 6.75% Senior Secured Notes due 2028 pursuant to a concurrent tender offer, and for general corporate purposes.

Share Repurchase Activity

During the fourth quarter of fiscal 2026, TransDigm returned $943 million to shareholders through share repurchases totaling 820 thousand shares of its common stock at an average price per share of $1,150. For the full 2026 fiscal year, TransDigm returned $2.8 billion to shareholders through share repurchases totaling 2.3 million shares of its common stock at an average price per share of $1,187.

Year-to-Date Results

Fiscal 2026 net sales increased 20%, or $1,726 million, to $10,557 million from $8,831 million in the comparable period a year ago. Organic sales growth as a percentage of net sales for fiscal 2026 was 11%, and 13% excluding non-aerospace sales.

Fiscal 2026 net income increased $34 million, or 2%, to $2,108 million from $2,074 million in the comparable period a year ago. The increase in net income primarily reflects the increase in net sales described above and the application of our value-driven operating strategy. The increase was offset by higher selling and administrative expenses and higher interest expense.

GAAP earnings per share were reduced in fiscal 2026 and 2025 by $1.03 per share and $3.58 per share, respectively, as a result of dividend equivalent payments made during each year. As a reminder, GAAP earnings per share are reduced when TransDigm makes dividend equivalent payments pursuant to its stock option plans. These dividend equivalent payments are made during TransDigm's first fiscal quarter each year and also upon payment of any special dividends.

Fiscal 2026 adjusted net income increased 10% to $2,383 million, or $41.35 per share, from $2,171 million, or $37.33 per share, in fiscal 2025.

Fiscal 2026 EBITDA increased 14% to $5,217 million from $4,568 million in fiscal 2025. EBITDA As Defined for fiscal 2026 increased 17% to $5,563 million compared with $4,760 million

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Exhibit 99.1

TransDigm Group Reports Fiscal 2026 Third Quarter Results

Cleveland, Ohio, August 4, 2026/PRNewswire/ -- TransDigm Group Incorporated (NYSE: TDG), a leading global designer, producer and supplier of highly engineered aircraft components, today reported results for the third quarter ended June 27, 2026.

Third quarter highlights include:

•Net sales of $2,741 million, up 23% from $2,237 million in the prior year's quarter;

•Net income of $540 million, up 10% from the prior year's quarter;

•Earnings per share of $9.39, up 11% from the prior year's quarter;

•EBITDA As Defined of $1,447 million, up 19% from $1,217 million in the prior year's quarter;

•EBITDA As Defined margin of 52.8%;

•Adjusted earnings per share of $10.87, up 13% from $9.60 in the prior year's quarter; and

•Upward revision to fiscal 2026 financial guidance.

Quarter-to-Date Results

Net sales for the quarter increased 23%, or $504 million, to $2,741 million from $2,237 million in the comparable quarter a year ago. Organic sales growth as a percentage of net sales was 13%.

Net income for the quarter increased $47 million, or 10%, to $540 million from $493 million in the comparable quarter a year ago. The increase in net income primarily reflects the increase in net sales described above and the application of our value-driven operating strategy. The increase was partially offset by higher selling and administration expense and higher interest expense.

Adjusted net income for the quarter increased 12% to $624 million, or $10.87 per share, from $558 million, or $9.60 per share, in the comparable quarter a year ago.

EBITDA for the quarter increased 20% to $1,345 million from $1,123 million for the comparable quarter a year ago. EBITDA As Defined for the quarter increased 19% to $1,447 million compared with $1,217 million in the comparable quarter a year ago. EBITDA As Defined as a percentage of net sales for the quarter was 52.8% compared with 54.4% in the comparable quarter a year ago.

“Our team executed another strong quarter, and we are very pleased with our results,” stated Mike Lisman, TransDigm Group's CEO. “All three of our major market channels again delivered double-digit growth compared to the prior year's third quarter. Commercial aftermarket growth of 17% remained strong this quarter. Commercial OEM grew nicely as well as the aircraft OEMs continue to increase build rates. Meanwhile, Defense saw another quarter of consistent growth and also built sizable backlog. Our reported EBITDA As Defined margin for the quarter was 52.8%. Adjusting for acquisition dilution, our base businesses continued to expand EBITDA margins on a year-over-year basis as the team executes on our value drivers.

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After the quarter ended, we announced the acquisition of Prince & Izant for approximately $1.07 billion. Prince & Izant's highly engineered, proprietary products are sold primarily into the aerospace and defense, aeroderivative turbine, and transportation end markets, and we believe the business will be an excellent fit within TransDigm.

Additionally, during the third quarter, we returned capital of approximately $1.0 billion to our shareholders through share repurchases bringing our year-to-date repurchases of our common stock to over $1.8 billion. As we look ahead to the remainder of fiscal 2026, we have significant liquidity and financial flexibility to address any likely range of capital requirements and remain highly focused on our capital allocation.

As always, we remain committed to our operating strategy and the TransDigm value drivers. We look forward to the opportunity to continue creating value for our shareholders as we finish our fiscal 2026.”

Acquisition Activity

As previously announced on April 7, 2026, TransDigm completed the acquisition of Jet Parts Engineering and Victor Sierra for approximately $2.2 billion in cash. Jet Parts Engineering is a leading independent designer and manufacturer of aerospace aftermarket solutions, primarily proprietary OEM-alternative parts and repairs. Victor Sierra is a leading designer, manufacturer, and distributor of proprietary PMA and other aftermarket parts serving the commercial aerospace end market — primarily the general aviation and business aviation sectors.

Subsequent to the quarter-end and as previously announced on July 27, 2026, TransDigm entered into a definitive agreement to acquire Prince & Izant (“P&I”) from Industrial Growth Partners for approximately $1.07 billion in cash, including certain tax benefits. P&I is a global designer and manufacturer of highly engineered brazing alloys and specialty metal components used across a range of advanced performance and high cost-of-failure applications. P&I primarily supports the aerospace and defense, aeroderivative turbine, and transportation end markets. Additionally, but to a lesser degree, P&I serves the medical and general industrial end markets.

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Exhibit 99.1

TransDigm Group Reports Fiscal 2026 Second Quarter Results

Cleveland, Ohio, May 5, 2026/PRNewswire/ -- TransDigm Group Incorporated (NYSE: TDG), a leading global designer, producer and supplier of highly engineered aircraft components, today reported results for the second quarter ended March 28, 2026.

Second quarter highlights include:

•Net sales of $2,544 million, up 18% from $2,150 million in the prior year's quarter;

•Net income of $536 million, up 12% from the prior year's quarter;

•Earnings per share of $9.20, up 12% from the prior year's quarter;

•EBITDA As Defined of $1,337 million, up 15% from $1,162 million in the prior year's quarter;

•EBITDA As Defined margin of 52.6%;

•Adjusted earnings per share of $9.85, up 8% from $9.11 in the prior year's quarter; and

•Upward revision to fiscal 2026 financial guidance.

Quarter-to-Date Results

Net sales for the quarter increased 18.3%, or $394 million, to $2,544 million from $2,150 million in the comparable quarter a year ago. Organic sales growth as a percentage of net sales was 11.0%.

Net income for the quarter increased $57 million, or 11.9%, from $479 million in the comparable quarter a year ago. The increase in net income primarily reflects the increase in net sales described above, the application of our value-driven operating strategy, and lower non-cash stock and deferred compensation expense. The increase was partially offset by higher interest expense as a result of the increase in TransDigm's year-over-year gross debt balance.

Adjusted net income for the quarter increased 8.5% to $574 million, or $9.85 per share, from $529 million, or $9.11 per share, in the comparable quarter a year ago.

EBITDA for the quarter increased 18.4% to $1,289 million from $1,089 million for the comparable quarter a year ago. EBITDA As Defined for the quarter increased 15.1% to $1,337 million compared with $1,162 million in the comparable quarter a year ago. EBITDA As Defined as a percentage of net sales for the quarter was 52.6% compared with 54.0% in the comparable quarter a year ago.

“We are pleased with our team's performance and operating results for the second quarter,” stated Mike Lisman, TransDigm Group's CEO. “Total revenue continued ahead of our expectations with double-digit growth across all three of our major market channels compared to the prior year's second quarter. Commercial aftermarket exhibited the highest growth across our three end markets, driven by our commercial transport segment growing 16% in the quarter. Commercial OEM market revenue increased in the double digits on a percentage basis as we continued supporting higher build rates at the OEMs. Our reported EBITDA As Defined margin for the quarter was 52.6%. Adjusting for acquisition dilution, the EBITDA margins of our base businesses improved nicely on a year over year basis and in line with our expectations. The team continues to execute our value drivers.

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Shortly after the quarter ended, we completed the acquisitions of the previously announced Jet Parts Engineering and Victor Sierra businesses for $2.2 billion. We are excited to have them as part of TransDigm. Additionally, during the second quarter and continuing into the first week of April, we returned $800 million of capital to our shareholders through share repurchases, bringing the total amount of share repurchases in the fiscal year to date to approximately $905 million.

As we look ahead to the remainder of fiscal 2026, we have significant liquidity and financial flexibility to address any likely range of capital requirements and remain highly focused on our capital allocation.

As always, we remain committed to our operating strategy and the TransDigm value drivers. We look forward to the opportunity to continue creating value for our shareholders through the second half of fiscal 2026.”

Acquisition Activity

Subsequent to the quarter, on April 7, 2026, TransDigm completed the acquisition of Jet Parts Engineering and Victor Sierra for $2.2 billion in cash. Jet Parts Engineering is a leading independent designer and manufacturer of aerospace aftermarket solutions, primarily proprietary OEM-alternative parts and repairs. Victor Sierra is a leading designer, manufacturer, and distributor of proprietary PMA and other aftermarket parts serving the commercial aerospace end market — primarily the general aviation and business aviation sectors.

As previously announced on December 31, 2025, TransDigm has entered into a definitive agreement to acquire Stellant Systems, Inc. from Arlington Capital Partners for approximately $960 million in cash. Stellant is a leading global designer and manufacturer of high-power electronic components and subsystems serving the aerospace and defense end market.

Financing Activity

During the quarter, on February 13, 2026, TransDigm successfully completed a private offering of $1.2 billion of 6.125% Senior Subordin