Who owns TransDigm Group (TDG)
Which tracked institutional funds hold TDG, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See TDG company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on TDG is one-sided between 2026-Q1 and 2026-Q2: 421 added or opened and 120 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
TDG’s largest tracked holder by dollar value, Capital International Investors, sizes it at 1.4% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 1.3pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in TDG divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 1082 tracked filers holding TDG, 564 increased or opened the position and 503 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in TDG between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 39
- TWO SIGMA INVESTMENTS, LP$60M
- Generate Investment Management Ltd$40M
- Connor, Clark & Lunn Investment Management Ltd.$25M
- OSSIAM$22M
- Nykredit A/S$19M
- JACKSON HILL ADVISORS, LLC$18M
Full exits 45
- Amundi$110M
- Qube Research & Technologies Ltd$55M
- VOLORIDGE INVESTMENT MANAGEMENT, LLC$52M
- HighTower Advisors, LLC$21M
- JUPITER ASSET MANAGEMENT LTD$16M
- WESTFIELD CAPITAL MANAGEMENT CO LP$15M
Largest adds
- BlackRock, Inc.$1.7B
- VANGUARD CAPITAL MANAGEMENT LLC$614M
- Capital Research Global Investors$512M
- STATE STREET CORP$492M
- VANGUARD PORTFOLIO MANAGEMENT LLC$456M
- Select Equity Group, L.P.$415M
Largest trims
- EDGEWOOD MANAGEMENT LLC$345M
- FMR LLC$118M
- STATE OF MICHIGAN RETIREMENT SYSTEM$69M
- Squarepoint Ops LLC$61M
- PRINCIPAL FINANCIAL GROUP INC$57M
- MARSHALL WACE, LLP$55M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| Capital International Investors trimmed | 5,062,682 | $6.7B | 10.5% | 2026-Q2 |
| BlackRock, Inc. added | 4,871,505 | $6.5B | 10.1% | 2026-Q2 |
| Capital World Investors trimmed | 4,274,109 | $5.7B | 8.9% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC trimmed | 3,653,511 | $4.9B | 7.6% | 2026-Q2 |
| Capital Research Global Investors trimmed | 3,119,490 | $4.2B | 6.5% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 2,580,994 | $3.4B | 5.4% | 2026-Q2 |
| STATE STREET CORP added | 2,559,096 | $3.4B | 5.3% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 1,709,129 | $2.3B | 3.6% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,286,385 | $1.7B | 2.7% | 2026-Q2 |
| FMR LLC trimmed | 1,091,534 | $1.5B | 2.3% | 2026-Q2 |
| Soroban Capital Partners LP added | 898,197 | $1.2B | 1.9% | 2026-Q2 |
| ALTAROCK PARTNERS LP trimmed | 875,755 | $1.2B | 1.8% | 2026-Q2 |
| MORGAN STANLEY trimmed | 872,559 | $1.2B | 1.8% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 835,113 | $1.1B | 1.7% | 2026-Q2 |
| NORGES BANK added | 781,731 | $1.0B | 1.6% | 2026-Q2 |
| WINDACRE PARTNERSHIP LLC added | 684,100 | $911M | 1.4% | 2026-Q2 |
| UBS Group AG added | 606,686 | $808M | 1.3% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 574,438 | $765M | 1.2% | 2026-Q2 |
| Invesco Ltd. added | 479,551 | $639M | 1.0% | 2026-Q2 |
| NORTHERN TRUST CORP added | 467,543 | $623M | 1.0% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 442,904 | $590M | 0.9% | 2026-Q2 |
| Stockbridge Partners LLC | 434,281 | $578M | 0.9% | 2026-Q2 |
| PRIMECAP MANAGEMENT CO/CA/ | 410,217 | $546M | 0.9% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE added | 392,447 | $523M | 0.8% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 354,105 | $472M | 0.7% | 2026-Q2 |
| Select Equity Group, L.P. added | 353,230 | $471M | 0.7% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 349,906 | $466M | 0.7% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 318,749 | $425M | 0.7% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO trimmed | 317,808 | $423M | 0.7% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 286,324 | $381M | 0.6% | 2026-Q2 |
| EDGEWOOD MANAGEMENT LLC trimmed | 278,240 | $371M | 0.6% | 2026-Q2 |
| Legal & General Group Plc trimmed | 267,276 | $356M | 0.6% | 2026-Q2 |
| CIBC Bancorp USA Inc. added | 233,167 | $311M | 0.5% | 2026-Q2 |
| Temasek Holdings (Private) Ltd trimmed | 203,419 | $271M | 0.4% | 2026-Q2 |
| Heard Capital LLC added | 186,289 | $248M | 0.4% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 183,673 | $245M | 0.4% | 2026-Q2 |
| Sumitomo Mitsui Trust Group, Inc. added | 181,405 | $242M | 0.4% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 174,808 | $233M | 0.4% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 173,772 | $231M | 0.4% | 2026-Q2 |
| Vulcan Value Partners, LLC trimmed | 170,429 | $227M | 0.4% | 2026-Q2 |
| Nuveen, LLC added | 167,347 | $223M | 0.3% | 2026-Q2 |
| BLAIR WILLIAM & CO/IL trimmed | 164,960 | $220M | 0.3% | 2026-Q2 |
| Swiss National Bank trimmed | 159,280 | $212M | 0.3% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD trimmed | 158,357 | $211M | 0.3% | 2026-Q2 |
| ALKEON CAPITAL MANAGEMENT LLC | 149,078 | $199M | 0.3% | 2026-Q2 |
| Mitsubishi UFJ Asset Management Co., Ltd. added | 144,880 | $193M | 0.3% | 2026-Q2 |
| BANK OF MONTREAL /CAN/ added | 142,184 | $189M | 0.3% | 2026-Q2 |
| Veritas Asset Management LLP added | 137,969 | $184M | 0.3% | 2026-Q2 |
| National Pension Service added | 135,233 | $180M | 0.3% | 2026-Q2 |
| CITIGROUP INC trimmed | 129,926 | $173M | 0.3% | 2026-Q2 |
| FRANKLIN RESOURCES INC trimmed | 122,664 | $163M | 0.3% | 2026-Q2 |
| Vanguard Global Advisers, LLC trimmed | 120,366 | $160M | 0.3% | 2026-Q2 |
| Skye Global Management LP added | 120,000 | $160M | 0.2% | 2026-Q2 |
| DF DENT & CO INC trimmed | 111,941 | $149M | 0.2% | 2026-Q2 |
| BRISTOL JOHN W & CO INC /NY/ trimmed | 108,456 | $144M | 0.2% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 106,903 | $142M | 0.2% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 105,396 | $140M | 0.2% | 2026-Q2 |
| Douglass Winthrop Advisors, LLC added | 105,306 | $140M | 0.2% | 2026-Q2 |
| California Public Employees Retirement System added | 95,459 | $127M | 0.2% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 95,123 | $127M | 0.2% | 2026-Q2 |
| KING LUTHER CAPITAL MANAGEMENT CORP trimmed | 94,221 | $126M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 92,555 | $123M | 0.2% | 2026-Q2 |
| HSBC HOLDINGS PLC added | 91,325 | $121M | 0.2% | 2026-Q2 |
| SANDS CAPITAL MANAGEMENT, LLC trimmed | 89,669 | $119M | 0.2% | 2026-Q2 |
| PNC Financial Services Group, Inc. added | 87,645 | $117M | 0.2% | 2026-Q2 |
| Atalan Capital Partners, LP added | 87,530 | $117M | 0.2% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 86,048 | $115M | 0.2% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 84,346 | $112M | 0.2% | 2026-Q2 |
| Douglas Lane & Associates, LLC added | 83,069 | $111M | 0.2% | 2026-Q2 |
| Russell Investments Group, Ltd. trimmed | 82,776 | $110M | 0.2% | 2026-Q2 |
| US BANCORP \DE\ trimmed | 79,707 | $106M | 0.2% | 2026-Q2 |
| Third Point LLC added | 79,000 | $105M | 0.2% | 2026-Q2 |
| BAMCO INC /NY/ trimmed | 78,501 | $105M | 0.2% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 78,373 | $104M | 0.2% | 2026-Q2 |
| ARGENT CAPITAL MANAGEMENT LLC trimmed | 66,590 | $89M | 0.1% | 2026-Q2 |
| Corient Private Wealth LP trimmed | 65,369 | $87M | 0.1% | 2026-Q2 |
| BARCLAYS PLC trimmed | 64,282 | $86M | 0.1% | 2026-Q2 |
| CAT ROCK CAPITAL MANAGEMENT LP added | 63,339 | $84M | 0.1% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 61,513 | $82M | 0.1% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND trimmed | 59,988 | $80M | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 58,222 | $67M | 0.1% | 2026-Q2 |
| Focus Partners Wealth added | 56,568 | $75M | 0.1% | 2026-Q2 |
| Chicago Capital, LLC added | 53,084 | $71M | 0.1% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 53,052 | $71M | 0.1% | 2026-Q2 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC added | 50,812 | $68M | 0.1% | 2026-Q2 |
| Hudson Way Capital Management LLC added | 50,410 | $67M | 0.1% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed | 49,894 | $66M | 0.1% | 2026-Q2 |
| SCHRODER INVESTMENT MANAGEMENT GROUP added | 49,697 | $66M | 0.1% | 2026-Q2 |
| Holocene Advisors, LP added | 49,202 | $66M | 0.1% | 2026-Q2 |
| DANSKE BANK A/S trimmed | 48,972 | $65M | 0.1% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM trimmed | 48,683 | $65M | 0.1% | 2026-Q2 |
| AVIVA PLC added | 47,791 | $64M | 0.1% | 2026-Q2 |
| PFA Pension, Forsikringsaktieselskab trimmed | 47,672 | $64M | 0.1% | 2026-Q2 |
| STOREBRAND ASSET MANAGEMENT AS added | 46,523 | $62M | 0.1% | 2026-Q2 |
| YCG, LLC added | 46,242 | $62M | 0.1% | 2026-Q2 |
| Retirement Systems of Alabama trimmed | 45,966 | $61M | 0.1% | 2026-Q2 |
| Blacksheep Fund Management Ltd | 45,754 | $61M | 0.1% | 2026-Q2 |
| CAPITAL FUND MANAGEMENT S.A. added | 44,921 | $60M | 0.1% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 44,914 | $60M | 0.1% | 2026-Q2 |
| Capital International, Inc./CA/ trimmed | 42,367 | $56M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.