REISS JOEL (Co-Chief Operating Officer) sold 52.0% of their position (3.90K shares) of TRANSDIGM GROUP INC on the open market

Open‑market sale worth $5.03M — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 26 sales

REISS JOEL

Filed: 12/16/2025ACC: 0001193125-25-320860

InsiderREISS JOELCIK 1656109

→

IssuerTRANSDIGM GROUP INCCIK 1260221

Officer· Co-Chief Operating Officer

Since Feb 2026

-3.90K

Net shares

Net seller

$5.03M

Total sold

Open market trades

0B · 26S

Total transactions

3.90K acquired · 7.80K disposed

Non-Derivative Transactions27

Common Stock

Direct

M · Option Exercise

+3.90K

Price / share

$284.97

Trade value

$1.11M

% of position

108.3%

12/15/2025

3.60K→7.50K

Common Stock

Direct

S · Sale

−80.00

Price / share

$1.28K

Trade value

$102.62K

% of position

1.1%

12/15/2025

7.50K→7.42K

Common Stock

Direct

S · Sale

−280.00

Price / share

$1.28K

Trade value

$359.44K

% of position

3.8%

12/15/2025

7.42K→7.14K

Common Stock

Direct

S · Sale

−220.00

Price / share

$1.28K

Trade value

$282.65K

% of position

3.1%

12/15/2025

7.14K→6.92K

Common Stock

Direct

S · Sale

−220.00

Price / share

$1.29K

Trade value

$282.84K

% of position

3.2%

12/15/2025

6.92K→6.70K

Common Stock

Direct

S · Sale

−262.00

Price / share

$1.29K

Trade value

$337.11K

% of position

3.9%

12/15/2025

6.70K→6.44K

Common Stock

Direct

S · Sale

−336.00

Price / share

$1.29K

Trade value

$432.67K

% of position

5.2%

12/15/2025

6.44K→6.10K

Common Stock

Direct

S · Sale

−536.00

Price / share

$1.29K

Trade value

$690.66K

% of position

8.8%

12/15/2025

6.10K→5.57K

Common Stock

Direct

S · Sale

−420.00

Price / share

$1.29K

Trade value

$541.72K

% of position

7.5%

12/15/2025

5.57K→5.15K

Common Stock

Direct

S · Sale

−220.00

Price / share

$1.29K

Trade value

$283.95K

% of position

4.3%

12/15/2025

5.15K→4.93K

Common Stock

Direct

S · Sale

−418.00

Price / share

$1.29K

Trade value

$539.92K

% of position

8.5%

12/15/2025

4.93K→4.51K

Common Stock

Direct

S · Sale

−279.00

Price / share

$1.29K

Trade value

$360.65K

% of position

6.2%

12/15/2025

4.51K→4.23K

Common Stock

Direct

S · Sale

−61.00

Price / share

$1.29K

Trade value

$78.92K

% of position

1.4%

12/15/2025

4.23K→4.17K

Common Stock

Direct

S · Sale

−50.00

Price / share

$1.29K

Trade value

$64.74K

% of position

1.2%

12/15/2025

4.17K→4.12K

Common Stock

Direct

S · Sale

−58.00

Price / share

$1.30K

Trade value

$75.17K

% of position

1.4%

12/15/2025

4.12K→4.06K

Common Stock

Direct

S · Sale

−32.00

Price / share

$1.30K

Trade value

$41.51K

% of position

0.8%

12/15/2025

4.06K→4.03K

Common Stock

Direct

S · Sale

−44.00

Price / share

$1.30K

Trade value

$57.12K

% of position

1.1%

12/15/2025

4.03K→3.98K

Common Stock

Direct

S · Sale

−12.00

Price / share

$1.30K

Trade value

$15.59K

% of position

0.3%

12/15/2025

3.98K→3.97K

Common Stock

Direct

S · Sale

−25.00

Price / share

$1.30K

Trade value

$32.51K

% of position

0.6%

12/15/2025

3.97K→3.95K

Common Stock

Direct

S · Sale

−14.00

Price / share

$1.30K

Trade value

$18.22K

% of position

0.4%

12/15/2025

3.95K→3.93K

Common Stock

Direct

S · Sale

−45.00

Price / share

$1.30K

Trade value

$58.64K

% of position

1.1%

12/15/2025

3.93K→3.89K

Common Stock

Direct

S · Sale

−60.00

Price / share

$1.30K

Trade value

$78.29K

% of position

1.5%

12/15/2025

3.89K→3.83K

Common Stock

Direct

S · Sale

−118.00

Price / share

$1.31K

Trade value

$154.11K

% of position

3.1%

12/15/2025

3.83K→3.71K

Common Stock

Direct

S · Sale

−20.00

Price / share

$1.31K

Trade value

$26.13K

% of position

0.5%

12/15/2025

3.71K→3.69K

Common Stock

Direct

S · Sale

−40.00

Price / share

$1.31K

Trade value

$52.32K

% of position

1.1%

12/15/2025

3.69K→3.65K

Common Stock

Direct

S · Sale

−20.00

Price / share

$1.31K

Trade value

$26.19K

% of position

0.5%

12/15/2025

3.65K→3.63K

Common Stock

Direct

S · Sale

−30.00

Price / share

$1.31K

Trade value

$39.34K

% of position

0.8%

12/15/2025

3.63K→3.60K

Total

Net shares

+0.00

Net value

-$3.92M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	12/15/2025	M · Option Exercise	+3.90K	$284.97	$1.11M	108.3%	3.60K	7.50K
Common Stock Direct	12/15/2025	S · Sale	−80.00	$1.28K	$102.62K	1.1%	7.50K	7.42K
Common Stock Direct	12/15/2025	S · Sale	−280.00	$1.28K	$359.44K	3.8%	7.42K	7.14K
Common Stock Direct	12/15/2025	S · Sale	−220.00	$1.28K	$282.65K	3.1%	7.14K	6.92K
Common Stock Direct	12/15/2025	S · Sale	−220.00	$1.29K	$282.84K	3.2%	6.92K	6.70K
Common Stock Direct	12/15/2025	S · Sale	−262.00	$1.29K	$337.11K	3.9%	6.70K	6.44K
Common Stock Direct	12/15/2025	S · Sale	−336.00	$1.29K	$432.67K	5.2%	6.44K	6.10K
Common Stock Direct	12/15/2025	S · Sale	−536.00	$1.29K	$690.66K	8.8%	6.10K	5.57K
Common Stock Direct	12/15/2025	S · Sale	−420.00	$1.29K	$541.72K	7.5%	5.57K	5.15K
Common Stock Direct	12/15/2025	S · Sale	−220.00	$1.29K	$283.95K	4.3%	5.15K	4.93K
Common Stock Direct	12/15/2025	S · Sale	−418.00	$1.29K	$539.92K	8.5%	4.93K	4.51K
Common Stock Direct	12/15/2025	S · Sale	−279.00	$1.29K	$360.65K	6.2%	4.51K	4.23K
Common Stock Direct	12/15/2025	S · Sale	−61.00	$1.29K	$78.92K	1.4%	4.23K	4.17K
Common Stock Direct	12/15/2025	S · Sale	−50.00	$1.29K	$64.74K	1.2%	4.17K	4.12K
Common Stock Direct	12/15/2025	S · Sale	−58.00	$1.30K	$75.17K	1.4%	4.12K	4.06K
Common Stock Direct	12/15/2025	S · Sale	−32.00	$1.30K	$41.51K	0.8%	4.06K	4.03K
Common Stock Direct	12/15/2025	S · Sale	−44.00	$1.30K	$57.12K	1.1%	4.03K	3.98K
Common Stock Direct	12/15/2025	S · Sale	−12.00	$1.30K	$15.59K	0.3%	3.98K	3.97K
Common Stock Direct	12/15/2025	S · Sale	−25.00	$1.30K	$32.51K	0.6%	3.97K	3.95K
Common Stock Direct	12/15/2025	S · Sale	−14.00	$1.30K	$18.22K	0.4%	3.95K	3.93K
Common Stock Direct	12/15/2025	S · Sale	−45.00	$1.30K	$58.64K	1.1%	3.93K	3.89K
Common Stock Direct	12/15/2025	S · Sale	−60.00	$1.30K	$78.29K	1.5%	3.89K	3.83K
Common Stock Direct	12/15/2025	S · Sale	−118.00	$1.31K	$154.11K	3.1%	3.83K	3.71K
Common Stock Direct	12/15/2025	S · Sale	−20.00	$1.31K	$26.13K	0.5%	3.71K	3.69K
Common Stock Direct	12/15/2025	S · Sale	−40.00	$1.31K	$52.32K	1.1%	3.69K	3.65K
Common Stock Direct	12/15/2025	S · Sale	−20.00	$1.31K	$26.19K	0.5%	3.65K	3.63K
Common Stock Direct	12/15/2025	S · Sale	−30.00	$1.31K	$39.34K	0.8%	3.63K	3.60K
Total			+0.00		-$3.92M

Derivative Transactions1

Stock Option

Direct

M · Option Exercise

Converts to

Common Stock

3.90K shares

−3.90K

Strike price

284.97

Held after

39.20K

Exercisable

—

12/15/2025

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option Direct	Common Stock3.90K shares	12/15/2025	M · Option Exercise	−3.90K	284.97	—	39.20K