TransDigm Group INC
Total Trades
267
Buys
6
Sells
139
Largest Trade
$1M+
Insiders
16
Institutional Funds
974
Inst. Value
$1M+
Activist Filings
16
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| SMALL ROBERT J | Director | BUY | $1K–$15K | 1 | $1285.00 | Feb 27, 2026 |
| Howley W Nicholas | Director | SELL | $1M+ | 10K | $1307.68 | Feb 20, 2026 |
| Howley W Nicholas | Director | EXERCISE | $500K+ | 10K | $50.92 | Feb 20, 2026 |
| Reiss Joel | COO | EXERCISE | $1M+ | 4K | $284.97 | Feb 18, 2026 |
| Reiss Joel | COO | SELL | $1M+ | 4K | $1293.88 | Feb 18, 2026 |
| Lisman Michael | President & CEO | BUY | $1M+ | 950 | $1284.26 | Feb 9, 2026 |
| Stein Kevin M | Director | SELL | $1M+ | 11K | $1434.49 | Feb 3, 2026 |
| Stein Kevin M | Director | EXERCISE | $1M+ | 48K | $341.77 | Feb 3, 2026 |
| Stein Kevin M | Director | SELL | $1M+ | 37K | $1425.79 | Feb 3, 2026 |
| Murphy Patrick Joseph | COO | EXERCISE | $50K–$100K | 290 | $269.42 | Feb 3, 2026 |
| Murphy Patrick Joseph | COO | SELL | $100K–$500K | 290 | $1430.10 | Feb 3, 2026 |
| Reiss Joel | COO | SELL | $1M+ | 4K | $1429.92 | Jan 16, 2026 |
| Reiss Joel | COO | EXERCISE | $1M+ | 4K | $284.97 | Jan 16, 2026 |
| Stein Kevin M | Director | SELL | $1M+ | 8K | $1406.38 | Jan 16, 2026 |
| Stein Kevin M | Director | EXERCISE | $1M+ | 8K | $342.31 | Jan 16, 2026 |
| Stein Kevin M | Director | EXERCISE | $1M+ | 17K | $342.31 | Jan 9, 2026 |
| Stein Kevin M | Director | SELL | $1M+ | 17K | $1407.25 | Jan 9, 2026 |
| Stein Kevin M | Director | SELL | $1M+ | 25K | $1373.59 | Jan 6, 2026 |
| Stein Kevin M | Director | EXERCISE | $1M+ | 25K | $172.36 | Jan 6, 2026 |
| Murphy Patrick Joseph | COO | EXERCISE | $50K–$100K | 290 | $269.42 | Jan 5, 2026 |
| Murphy Patrick Joseph | COO | SELL | $100K–$500K | 290 | $1329.03 | Jan 5, 2026 |
| Reiss Joel | COO | SELL | $1M+ | 4K | $1290.52 | Dec 16, 2025 |
| Reiss Joel | COO | EXERCISE | $1M+ | 4K | $284.97 | Dec 16, 2025 |
| SMALL ROBERT J | Director | SELL | $1M+ | 5K | $1290.19 | Dec 11, 2025 |
| SMALL ROBERT J | Director | EXERCISE | $100K–$500K | 5K | $66.47 | Dec 11, 2025 |
| SMALL ROBERT J | Director | SELL | $1M+ | 91K | $1335.72 | Dec 10, 2025 |
| Stein Kevin M | Director | SELL | $1M+ | 18K | $1362.29 | Dec 5, 2025 |
| Stein Kevin M | Director | EXERCISE | $1M+ | 18K | $105.88 | Dec 5, 2025 |
| Murphy Patrick Joseph | COO | SELL | $100K–$500K | 290 | $1351.06 | Dec 2, 2025 |
| Murphy Patrick Joseph | COO | EXERCISE | $50K–$100K | 290 | $269.42 | Dec 2, 2025 |
| Stein Kevin M | Director | EXERCISE | $100K–$500K | 5K | $105.88 | Dec 1, 2025 |
| Stein Kevin M | Director | SELL | $1M+ | 5K | $1360.73 | Dec 1, 2025 |
| Stein Kevin M | Director | EXERCISE | $100K–$500K | 4K | $105.88 | Nov 26, 2025 |
| Stein Kevin M | Director | SELL | $1M+ | 4K | $1360.57 | Nov 26, 2025 |
| Stein Kevin M | Director | SELL | $100K–$500K | 230 | $1360.31 | Nov 24, 2025 |
| Stein Kevin M | Director | EXERCISE | $15K–$50K | 230 | $105.88 | Nov 24, 2025 |
| Stein Kevin M | Director | EXERCISE | $100K–$500K | 1K | $105.88 | Nov 21, 2025 |
| Stein Kevin M | Director | SELL | $1M+ | 1K | $1360.89 | Nov 21, 2025 |
| Stein Kevin M | Director | EXERCISE | $500K+ | 7K | $105.88 | Nov 19, 2025 |
| Stein Kevin M | Director | SELL | $1M+ | 7K | $1361.57 | Nov 19, 2025 |
| Reiss Joel | COO | SELL | $1M+ | 4K | $1340.00 | Nov 18, 2025 |
| Reiss Joel | COO | EXERCISE | $1M+ | 4K | $284.97 | Nov 18, 2025 |
| Lisman Michael | President & CEO | BUY | $1M+ | 2K | $1339.14 | Nov 17, 2025 |
| Howley W Nicholas | Director | SELL | $1M+ | 3K | $1334.92 | Nov 17, 2025 |
| Howley W Nicholas | Director | EXERCISE | $100K–$500K | 3K | $50.92 | Nov 17, 2025 |
| Murphy Patrick Joseph | COO | EXERCISE | $50K–$100K | 290 | $269.42 | Nov 4, 2025 |
| Murphy Patrick Joseph | COO | SELL | $100K–$500K | 290 | $1310.00 | Nov 4, 2025 |
| Stein Kevin M | Director | SELL | $500K+ | 700 | $1360.00 | Oct 28, 2025 |
| Stein Kevin M | Director | EXERCISE | $50K–$100K | 700 | $105.88 | Oct 28, 2025 |
| Murphy Patrick Joseph | COO | EXERCISE | $100K–$500K | 580 | $269.42 | Oct 28, 2025 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 974 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| Capital International Investors | 6.5M | $1M+ | SH |
| Capital World Investors | 4.0M | $1M+ | SH |
| Capital Research Global Investors | 2.5M | $1M+ | SH |
| STATE STREET CORP | 2.5M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 1.1M | $1M+ | SH |
| ALTAROCK PARTNERS LP | 969K | $1M+ | SH |
| NORGES BANK | 771K | $1M+ | SH |
| EDGEWOOD MANAGEMENT LLC | 581K | $1M+ | SH |
| PRIMECAP MANAGEMENT CO/CA/ | 410K | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 397K | $1M+ | SH |
| VANGUARD GROUP INC | 316K | $1M+ | SH |
| Point72 Asset Management, L.P. | 253K | $1M+ | SH |
| Vulcan Value Partners, LLC | 241K | $1M+ | SH |
| Sumitomo Mitsui Trust Group, Inc. | 197K | $1M+ | SH |
| Swiss National Bank | 154K | $1M+ | SH |
| DF DENT & CO INC | 150K | $1M+ | SH |
| National Pension Service | 133K | $1M+ | SH |
| DIMENSIONAL FUND ADVISORS LP | 126K | $1M+ | SH |
| Mitsubishi UFJ Asset Management Co., Ltd. | 121K | $1M+ | SH |
| UBS Group AG | 121K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G/A · Jul 29, 2025
11.9%
6.7M shares
SC 13G/A · Feb 13, 2025
6.8%
3.8M shares
SC 13G/A · Nov 8, 2024
7.0%
3.9M shares
SC 13G/A · Oct 22, 2024
7.0%
3.9M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
10.8%
6.0M shares
Principal Global Investors, LLC
SC 13G/A · Feb 13, 2024
4.1%
2.3M shares
Capital World Investors 95-1411037
SC 13G · Feb 9, 2024
5.6%
3.1M shares
Capital International Investors 95-1411037
SC 13G/A · Feb 9, 2024
12.2%
6.7M shares
SC 13G/A · Jan 25, 2024
8.1%
4.5M shares
Principal Global Investors, LLC
SC 13G/A · Feb 14, 2023
5.5%
3.0M shares
Capital International Investors 95-1411037
SC 13G/A · Feb 13, 2023
12.4%
6.8M shares
SC 13G/A · Jan 30, 2023
8.7%
4.8M shares
SC 13G/A · Jan 25, 2023
8.7%
4.8M shares
The Vanguard Group - 23-1945930
SC 13G/A · Mar 9, 2022
10.1%
5.6M shares
Principal Global Investors, LLC
SC 13G/A · Feb 15, 2022
5.0%
2.8M shares
Capital International Investors 95-1411037
SC 13G/A · Feb 11, 2022
12.2%
6.8M shares