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 $5.58M — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 18 sales

REISS JOEL

Filed: 1/16/2026ACC: 0001193125-26-015541

InsiderREISS JOELCIK 1656109

→

IssuerTRANSDIGM GROUP INCCIK 1260221

Officer· Co-Chief Operating Officer

Since Feb 2026

-3.90K

Net shares

Net seller

$5.58M

Total sold

Open market trades

0B · 18S

Total transactions

3.90K acquired · 7.80K disposed

Non-Derivative Transactions19

Common Stock

Direct

M · Option Exercise

+3.90K

Price / share

$284.97

Trade value

$1.11M

% of position

108.3%

1/15/2026

3.60K→7.50K

Common Stock

Direct

S · Sale

−44.00

Price / share

$1.42K

Trade value

$62.50K

% of position

0.6%

1/15/2026

7.50K→7.46K

Common Stock

Direct

S · Sale

−67.00

Price / share

$1.42K

Trade value

$95.27K

% of position

0.9%

1/15/2026

7.46K→7.39K

Common Stock

Direct

S · Sale

−95.00

Price / share

$1.42K

Trade value

$135.15K

% of position

1.3%

1/15/2026

7.39K→7.29K

Common Stock

Direct

S · Sale

−128.00

Price / share

$1.42K

Trade value

$182.25K

% of position

1.8%

1/15/2026

7.29K→7.17K

Common Stock

Direct

S · Sale

−90.00

Price / share

$1.43K

Trade value

$128.26K

% of position

1.3%

1/15/2026

7.17K→7.08K

Common Stock

Direct

S · Sale

−245.00

Price / share

$1.43K

Trade value

$349.46K

% of position

3.5%

1/15/2026

7.08K→6.83K

Common Stock

Direct

S · Sale

−396.00

Price / share

$1.43K

Trade value

$565.20K

% of position

5.8%

1/15/2026

6.83K→6.43K

Common Stock

Direct

S · Sale

−477.00

Price / share

$1.43K

Trade value

$681.17K

% of position

7.4%

1/15/2026

6.43K→5.96K

Common Stock

Direct

S · Sale

−260.00

Price / share

$1.43K

Trade value

$371.58K

% of position

4.4%

1/15/2026

5.96K→5.70K

Common Stock

Direct

S · Sale

−372.00

Price / share

$1.43K

Trade value

$532.04K

% of position

6.5%

1/15/2026

5.70K→5.33K

Common Stock

Direct

S · Sale

−453.00

Price / share

$1.43K

Trade value

$648.36K

% of position

8.5%

1/15/2026

5.33K→4.87K

Common Stock

Direct

S · Sale

−257.00

Price / share

$1.43K

Trade value

$368.13K

% of position

5.3%

1/15/2026

4.87K→4.62K

Common Stock

Direct

S · Sale

−486.00

Price / share

$1.43K

Trade value

$696.61K

% of position

10.5%

1/15/2026

4.62K→4.13K

Common Stock

Direct

S · Sale

−200.00

Price / share

$1.43K

Trade value

$286.84K

% of position

4.8%

1/15/2026

4.13K→3.93K

Common Stock

Direct

S · Sale

−205.00

Price / share

$1.44K

Trade value

$294.20K

% of position

5.2%

1/15/2026

3.93K→3.73K

Common Stock

Direct

S · Sale

−35.00

Price / share

$1.44K

Trade value

$50.27K

% of position

0.9%

1/15/2026

3.73K→3.69K

Common Stock

Direct

S · Sale

−50.00

Price / share

$1.44K

Trade value

$71.88K

% of position

1.4%

1/15/2026

3.69K→3.64K

Common Stock

Direct

S · Sale

−40.00

Price / share

$1.44K

Trade value

$57.56K

% of position

1.1%

1/15/2026

3.64K→3.60K

Total

Net shares

+0.00

Net value

-$4.47M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	1/15/2026	M · Option Exercise	+3.90K	$284.97	$1.11M	108.3%	3.60K	7.50K
Common Stock Direct	1/15/2026	S · Sale	−44.00	$1.42K	$62.50K	0.6%	7.50K	7.46K
Common Stock Direct	1/15/2026	S · Sale	−67.00	$1.42K	$95.27K	0.9%	7.46K	7.39K
Common Stock Direct	1/15/2026	S · Sale	−95.00	$1.42K	$135.15K	1.3%	7.39K	7.29K
Common Stock Direct	1/15/2026	S · Sale	−128.00	$1.42K	$182.25K	1.8%	7.29K	7.17K
Common Stock Direct	1/15/2026	S · Sale	−90.00	$1.43K	$128.26K	1.3%	7.17K	7.08K
Common Stock Direct	1/15/2026	S · Sale	−245.00	$1.43K	$349.46K	3.5%	7.08K	6.83K
Common Stock Direct	1/15/2026	S · Sale	−396.00	$1.43K	$565.20K	5.8%	6.83K	6.43K
Common Stock Direct	1/15/2026	S · Sale	−477.00	$1.43K	$681.17K	7.4%	6.43K	5.96K
Common Stock Direct	1/15/2026	S · Sale	−260.00	$1.43K	$371.58K	4.4%	5.96K	5.70K
Common Stock Direct	1/15/2026	S · Sale	−372.00	$1.43K	$532.04K	6.5%	5.70K	5.33K
Common Stock Direct	1/15/2026	S · Sale	−453.00	$1.43K	$648.36K	8.5%	5.33K	4.87K
Common Stock Direct	1/15/2026	S · Sale	−257.00	$1.43K	$368.13K	5.3%	4.87K	4.62K
Common Stock Direct	1/15/2026	S · Sale	−486.00	$1.43K	$696.61K	10.5%	4.62K	4.13K
Common Stock Direct	1/15/2026	S · Sale	−200.00	$1.43K	$286.84K	4.8%	4.13K	3.93K
Common Stock Direct	1/15/2026	S · Sale	−205.00	$1.44K	$294.20K	5.2%	3.93K	3.73K
Common Stock Direct	1/15/2026	S · Sale	−35.00	$1.44K	$50.27K	0.9%	3.73K	3.69K
Common Stock Direct	1/15/2026	S · Sale	−50.00	$1.44K	$71.88K	1.4%	3.69K	3.64K
Common Stock Direct	1/15/2026	S · Sale	−40.00	$1.44K	$57.56K	1.1%	3.64K	3.60K
Total			+0.00		-$4.47M

Derivative Transactions1

Stock Option

Direct

M · Option Exercise

Converts to

Common Stock

3.90K shares

−3.90K

Strike price

284.97

Held after

35.30K

Exercisable

—

1/15/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option Direct	Common Stock3.90K shares	1/15/2026	M · Option Exercise	−3.90K	284.97	—	35.30K