Reiss Joel 4

4 · TransDigm Group INC · Filed Jul 17, 2026

Research Summary

AI-generated summary of this filing

Updated Jul 17, 2026

TransDigm (TDG) COO Joel Reiss Exercises Options, Sells Shares

What Happened

Joel Reiss, Chief Operating Officer of TransDigm Group (TDG), exercised/converted derivatives (code M) and acquired a total of 7,800 shares (two entries of 3,900 each). One exercise reported a cash cost of $284.97 per share (3,900 shares; $1,111,383); the other 3,900-share conversion is reported at $0.00.
On the same date (2026-07-15) he sold 3,486 shares in multiple open-market transactions (code S) at prices ranging roughly from $1,195 to $1,229, producing gross proceeds of $4,239,695. The weighted average sale price was about $1,217 per share.
Net from these reported entries, Reiss acquired 7,800 shares and sold 3,486 — a net increase of 4,314 shares for him based on this filing. These transactions show option exercise followed by partial sale (common for exercise/tax/liquidity reasons), not a directional endorsement of the stock.

Key Details

Transaction date: July 15, 2026; Form filed July 17, 2026 (timely).
Options exercised: 7,800 shares total (two entries of 3,900). Reported cash cost shown: $1,111,383 (for the $284.97 exercise).
Shares sold: 3,486 shares, gross proceeds $4,239,695, weighted average ~ $1,217/share.
Footnotes: Multiple footnotes (F1–F28) indicate the sales occurred in many small lots at varying prices within ranges (≈ $1,195.03–$1,229.44); reported prices are weighted averages for groups of trades.
Shares owned after transaction: not specified in this portion of the filing (this is the first of two Form 4s for these transactions).

Context

M = option exercise/derivative conversion; S = open-market sale. This pattern (exercise then sell some shares) is commonly used to cover exercise cost or taxes or to diversify — the filing itself does not state motive.
Because this is the first of two Form 4s for the transaction, additional detail (including full post-transaction holdings) may appear in the subsequent filing.

Insider Transaction Report

Form 4

Period: 2026-07-15

TransDigm Group INCTDG

Reiss Joel

Co-Chief Operating Officer

Transactions

Exercise/Conversion
Common Stock
2026-07-15$284.97/sh+3,900$1,111,383→ 7,500 total
Sale
Common Stock
[F1]
2026-07-15$1195.20/sh−10$11,952→ 7,490 total
Sale
Common Stock
[F2]
2026-07-15$1197.85/sh−70$83,850→ 7,420 total
Sale
Common Stock
[F3]
2026-07-15$1198.80/sh−80$95,904→ 7,340 total
Sale
Common Stock
[F4]
2026-07-15$1200.14/sh−156$187,222→ 7,184 total
Sale
Common Stock
[F5]
2026-07-15$1201.32/sh−160$192,211→ 7,024 total
Sale
Common Stock
[F6]
2026-07-15$1202.44/sh−116$139,483→ 6,908 total
Sale
Common Stock
[F7]
2026-07-15$1203.80/sh−74$89,081→ 6,834 total
Sale
Common Stock
2026-07-15$1204.60/sh−10$12,046→ 6,824 total
Sale
Common Stock
[F8]
2026-07-15$1206.69/sh−30$36,201→ 6,794 total
Sale
Common Stock
[F9]
2026-07-15$1208.51/sh−60$72,510→ 6,734 total
Sale
Common Stock
[F10]
2026-07-15$1209.20/sh−80$96,736→ 6,654 total
Sale
Common Stock
[F11]
2026-07-15$1210.31/sh−30$36,309→ 6,624 total
Sale
Common Stock
[F12]
2026-07-15$1211.50/sh−90$109,035→ 6,534 total
Sale
Common Stock
[F13]
2026-07-15$1212.59/sh−110$133,385→ 6,424 total
Sale
Common Stock
[F14]
2026-07-15$1213.73/sh−170$206,334→ 6,254 total
Sale
Common Stock
[F15]
2026-07-15$1215.13/sh−211$256,392→ 6,043 total
Sale
Common Stock
[F16]
2026-07-15$1216.22/sh−239$290,678→ 5,804 total
Sale
Common Stock
[F17]
2026-07-15$1217.25/sh−60$73,035→ 5,744 total
Sale
Common Stock
[F18]
2026-07-15$1218.22/sh−90$109,640→ 5,654 total
Sale
Common Stock
[F19]
2026-07-15$1219.30/sh−90$109,737→ 5,564 total
Sale
Common Stock
[F20]
2026-07-15$1220.50/sh−140$170,869→ 5,424 total
Sale
Common Stock
[F21]
2026-07-15$1221.53/sh−210$256,521→ 5,214 total
Sale
Common Stock
[F22]
2026-07-15$1222.60/sh−60$73,356→ 5,154 total
Sale
Common Stock
[F23]
2026-07-15$1223.51/sh−138$168,845→ 5,016 total
Sale
Common Stock
[F24]
2026-07-15$1224.62/sh−509$623,332→ 4,507 total
Sale
Common Stock
[F25]
2026-07-15$1225.62/sh−153$187,519→ 4,354 total
Sale
Common Stock
[F26]
2026-07-15$1226.98/sh−40$49,079→ 4,314 total
Sale
Common Stock
[F27]
2026-07-15$1227.82/sh−210$257,842→ 4,104 total
Sale
Common Stock
[F28]
2026-07-15$1228.79/sh−90$110,591→ 4,014 total
Exercise/Conversion
Stock Option
2026-07-15+3,900→ 19,700 total
Exercise: $284.97From: 2021-09-30Exp: 2027-11-08→ Common Stock (3,900 underlying)

Footnotes (28)

[F1]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,195.0300 - $1,195.3200. 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.
[F10]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,208.9700 - $1,209.4000. 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.
[F11]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,210.1300 - $1,210.4500. 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.
[F12]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,211.1600 - $1,211.9300. 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.
[F13]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,212.2400 - $1,213.0100. 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.
[F14]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,213.2600 - $1,214.1500. 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.
[F15]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,214.6500 - $1,215.6200 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.
[F16]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,215.6600 - $1,216.6400. 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.
[F17]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,216.7200 - $1,217.6700. 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.
[F18]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,217.8300 - $1,218.6200. 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.
[F19]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,218.9300 - $1,219.6900. 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.
[F2]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,197.5000 - $1,198.4400. 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.
[F20]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,220.0600 - $1,221.0400. 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.
[F21]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,221.0900 - $1,222.0600. 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.
[F22]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,222.1300 - $1,223.1200. 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.
[F23]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,223.1500 - $1,224.1200. 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.
[F24]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,224.1600 - $1,225.1300. 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.
[F25]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,225.2200 - $1,226.1000. 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.
[F26]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,226.4000- $1,227.3200. 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.
[F27]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,227.5200- $1,228.4600. 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.
[F28]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,228.5700 - $1,229.4400. 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.
[F3]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,198.6500 - $1,199.4500. 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.
[F4]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,199.8400 - $1,200.5700. 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.
[F5]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,200.8800 - $1,2201.7100. 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.
[F6]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,202.0100 - $1,202.9200. 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.
[F7]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,203.0500 - $1,204.0300. 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.
[F8]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,206.4600 - $1,207.0900. 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.
[F9]Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,207.9200 - $1,208.9000. 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.

Signature

/s/ Rachel L. Quinlan as attorney in fact for Joel Reiss|2026-07-17

Documents

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