SEC Form 4 · accession 0001656109-26-000008
TransDigm Group INC · TDG
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Joel Reiss
Officer — Co-Chief Operating Officer
Period of report
Sep 15, 2026
Accepted (ET)
Sep 16, 2026 · 5:09 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0001260221
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common Stock | Sep 15, 2026 | M | 3,900 | $284.97 | A | 7,500 | D | |
| Common StockF1 | Sep 15, 2026 | S | 310 | $1,082.9639 | D | 7,190 | D | |
| Common StockF2 | Sep 15, 2026 | S | 170 | $1,083.6729 | D | 7,020 | D | |
| Common StockF3 | Sep 15, 2026 | S | 240 | $1,084.8696 | D | 6,780 | D | |
| Common StockF4 | Sep 15, 2026 | S | 110 | $1,086.2727 | D | 6,670 | D | |
| Common StockF5 | Sep 15, 2026 | S | 120 | $1,087.4892 | D | 6,550 | D | |
| Common Stock | Sep 15, 2026 | S | 10 | $1,088.06 | D | 6,540 | D | |
| Common StockF6 | Sep 15, 2026 | S | 70 | $1,090.0571 | D | 6,470 | D | |
| Common StockF7 | Sep 15, 2026 | S | 100 | $1,091.0018 | D | 6,370 | D | |
| Common StockF8 | Sep 15, 2026 | S | 170 | $1,092.1284 | D | 6,200 | D | |
| Common StockF9 | Sep 15, 2026 | S | 282 | $1,093.1036 | D | 5,918 | D | |
| Common StockF10 | Sep 15, 2026 | S | 383 | $1,094.0605 | D | 5,535 | D | |
| Common StockF11 | Sep 15, 2026 | S | 225 | $1,095.1079 | D | 5,310 | D | |
| Common StockF12 | Sep 15, 2026 | S | 196 | $1,096.1685 | D | 5,114 | D | |
| Common StockF13 | Sep 15, 2026 | S | 294 | $1,097.2633 | D | 4,820 | D | |
| Common StockF14 | Sep 15, 2026 | S | 150 | $1,098.407 | D | 4,670 | D | |
| Common StockF15 | Sep 15, 2026 | S | 90 | $1,099.1429 | D | 4,580 | D | |
| Common StockF16 | Sep 15, 2026 | S | 60 | $1,100.4055 | D | 4,520 | D | |
| Common StockF17 | Sep 15, 2026 | S | 166 | $1,101.5243 | D | 4,354 | D | |
| Common StockF18 | Sep 15, 2026 | S | 274 | $1,102.4893 | D | 4,080 | D | |
| Common StockF19 | Sep 15, 2026 | S | 210 | $1,103.4377 | D | 3,870 | D | |
| Common StockF20 | Sep 15, 2026 | S | 125 | $1,104.5772 | D | 3,745 | D | |
| Common StockF21 | Sep 15, 2026 | S | 5 | $1,105.284 | D | 3,740 | D | |
| Common StockF22 | Sep 15, 2026 | S | 40 | $1,106.6873 | D | 3,700 | D | |
| Common StockF23 | Sep 15, 2026 | S | 30 | $1,108.3433 | D | 3,670 | D | |
| Common StockF24 | Sep 15, 2026 | S | 30 | $1,112.3767 | D | 3,640 | D | |
| Common Stock | Sep 15, 2026 | S | 20 | $1,113.37 | D | 3,620 | D | |
| Common StockF25 | Sep 15, 2026 | S | 20 | $1,118.995 | D | 3,600 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stock Option | $284.97 | Sep 15, 2026 | M | 3,900 | D | Sep 30, 2021 | Nov 8, 2027 | Common Stock | 3,900 | 4,100 | D |
Explanation of responses
- F1Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,082.3500 - $1,083.2700. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F10Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,093.6200 - $1,094.5600. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F11Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,094.6300 - $1,095.5700. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F12Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,095.7000 - $1,096.6900. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F13Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,096.7000 - $1,097.6900. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F14Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,097.7200 - $1,098.7100. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F15Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,098.7700 - $1,099.6500. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F16Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,099.9300 - $1,100.7000. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F17Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,100.9400 - $1,101.9200. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F18Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,102.0000 - $1,102.9800. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F19Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,103.0100 - $1,103.8850. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F2Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,083.3700 - $1,084.2700. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F20Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,104.0300 - $1,105.0100. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F21Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,105.2400 - $1,105.4600. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F22Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,106.3200 - $1,106.8900. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F23Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,108.2300 - $1,108.4000. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F24Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,112.3400 - $1,112.4500. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F25Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,118.9700 - $1,119.0200. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F3Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,084.6500 - $1,085.2700. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F4Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,085.7600 - $1,086.5700. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F5Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,087.0000 - $1,087.9200. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F6Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,089.5400 - $1,090.3600. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F7Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,090.5800 - $1,091.4500. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F8Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,091.5800 - $1,092.5700. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F9Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,092.5800 - $1,093.5700. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.