Insider trade

Officer sold ~$542K of TDG shares in the open market

Traded Dec 15, 2025 · Filed Dec 16, 2025

~$542K
Approx. value · 420 sh @ $1,289.81: 5,146
Holds after · shares reported: −15.4%
stock since the trade · S&P 500 +13.8%, $1,292.08 → $1,092.66 on Oct 5

Why it stands out

TransDigm's Co-Chief Operating Officer sold $542K of TransDigm shares. The filing does not indicate a pre-arranged trading plan.

Written from the filing's own figures. OQRO describes what was reported and never tells you what to buy or sell

View the official recordSEC Form 4 — Statement of Changes in Beneficial Ownership

All the details

Dates, kept separate

Transaction date: Dec 15, 2025
Reporting period: Not applicable
Filed with the SEC: Dec 16, 2025

Officer$500K–$1M

Context

Classification

open market sale

Code S — open-market or private sale

Absolute commitment

~$541,719

Shares × reported transaction price

Timing vs results

33 days after results of Nov 12, 2025, 50 days before results of Feb 3, 2026

Results dates are the company's own 8-K (Item 2.02). Many companies only let insiders trade in a window after results

Price at the time

Closed at $1,292.08 on Dec 15, 2025, within 5% of its 52-week low, after a 1% drop over the previous 30 trading days

52-week range $1,231.75 (Apr 8, 2025) to $1,620.83 (Jul 30, 2025), 16% of the way up, from 250 adjusted closes. 30 trading days earlier: $1,308.51 on Oct 31, 2025. Describes the past only, not a forecast

Planned / mechanical clue

None found in footnotes

Only flagged when a footnote says so; never inferred

After it was reported

After	Stock	S&P 500	Difference
7 days	+4.1%	+2.8%	+1.3%
30 days	+14.9%	+3.0%	+11.9%
90 days	−2.3%	−0.1%	−2.2%
180 days	+1.3%	+12.4%	−11.2%

Past results only. Not a forecast.

Source receipt

Record ID: 0001193125-25-320860
Filed / recorded: Dec 16, 2025, 9:09 PM UTC
Added to OQRO: Oct 2, 2026, 12:28 PM UTC
Parser: form4-xml-v1
Data quality: Verified: identifiers matched exactly
Issuer: TransDigm Group INC
Issuer CIK: 1260221
Ticker: TDG
Reporting person: Joel Reiss
Relationship: Officer
Officer title: Co-Chief Operating Officer
Security: Common Stock
Table: Non-derivative (Table I)
Transaction date: Dec 15, 2025
Transaction code: S
Shares / units: 420
Price per share: $1,289.81
Acquired / disposed: Disposed (D)
Shares owned after: 5,146
Ownership form: Direct
Amendment: No

Footnotes from the filing

Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,289.2000 - $1,290.1900. 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.