TransDigm Group INC (TDG)
Every FINRA and SEC series the site collects for TransDigm Group INC: short interest with days to cover, daily short sale volume, fails to deliver and Form 4 insider trades. Listed on NYSE, classified by the SEC as aircraft parts & auxiliary equipment, nec.
899K
Short interest
settlement 2026-08-31
2.5
Days to cover
+7.6% vs prior
43.0%
Short share of volume
2026-09-11
1
Fails to deliver
settlement 2026-08-13
-$57.5M
Insider flow, 90 days
0 buys, 99 sells
As of 2026-09-11.
Short interest
FINRA, twice a month; the last 12 months shown, all 48 settlements in the JSONAs of 31 August 2026, short interest in TDG is 899,190 shares, down 63,216 shares over the last month. Over the last 48 readings it ranged from 733,339 shares (13 September 2024) to 1,322,020 shares (30 April 2025). At the reported average volume of 358K shares a day that is 2.5 days to cover.
Embed this chartkeeps the attribution line it carries
<iframe src="https://xoomar.com/embed/stocks/tdg" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-08-31 | 899,190 | +7.6% | 357,854 | 2.51 |
| 2026-08-14 | 835,437 | -13.2% | 561,702 | 1.49 |
| 2026-07-31 | 962,406 | -10.3% | 330,891 | 2.91 |
| 2026-07-15 | 1,073,290 | -6.4% | 332,164 | 3.23 |
| 2026-06-30 | 1,146,271 | +1.6% | 488,201 | 2.35 |
| 2026-06-15 | 1,128,497 | +7.7% | 335,732 | 3.36 |
| 2026-05-29 | 1,048,245 | +6.9% | 440,186 | 2.38 |
| 2026-05-15 | 980,573 | -2.4% | 398,240 | 2.46 |
| 2026-04-30 | 1,004,138 | -3.3% | 421,527 | 2.38 |
| 2026-04-15 | 1,038,571 | -1.0% | 314,401 | 3.30 |
| 2026-03-31 | 1,048,865 | +10.8% | 476,304 | 2.20 |
| 2026-03-13 | 946,415 | -2.9% | 334,672 | 2.83 |
| 2026-02-27 | 974,719 | -13.6% | 331,892 | 2.94 |
| 2026-02-13 | 1,128,706 | -9.8% | 553,045 | 2.04 |
| 2026-01-30 | 1,251,536 | +3.7% | 332,280 | 3.77 |
| 2026-01-15 | 1,207,366 | +8.2% | 344,388 | 3.51 |
| 2025-12-31 | 1,116,160 | -7.1% | 326,478 | 3.42 |
| 2025-12-15 | 1,201,665 | -7.0% | 288,611 | 4.16 |
| 2025-11-28 | 1,292,031 | +8.8% | 304,229 | 4.25 |
| 2025-11-14 | 1,187,974 | +4.1% | 337,757 | 3.52 |
| 2025-10-31 | 1,141,479 | +5.5% | 273,419 | 4.17 |
| 2025-10-15 | 1,081,517 | -4.2% | 290,876 | 3.72 |
| 2025-09-30 | 1,128,485 | +7.3% | 278,927 | 4.05 |
| 2025-09-15 | 1,051,706 | -2.1% | 461,917 | 2.28 |
Daily short volume
FINRA Reg SHO, last 60 sessions. JSONAs of 11 September 2026, the short share of TDG volume is 43.0%, down 4.0 points over the last five sessions. Over the last 52 readings it ranged from 24.4% (14 August 2026) to 79.5% (13 July 2026). The latest reading is 2.2 points below the 30-session average of 45.2%, on 142K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-09-11 | 61K | 142K | 43.0% | 7,324 |
| 2026-09-10 | 55K | 138K | 39.8% | 454 |
| 2026-09-09 | 62K | 129K | 48.2% | 47 |
| 2026-09-08 | 69K | 114K | 60.5% | 21 |
| 2026-09-04 | 54K | 84K | 64.0% | 0 |
| 2026-09-03 | 55K | 118K | 47.0% | 10 |
| 2026-09-02 | 82K | 157K | 52.0% | 415 |
| 2026-09-01 | 60K | 115K | 52.0% | 2,886 |
| 2026-08-31 | 84K | 189K | 44.4% | 255 |
| 2026-08-28 | 37K | 82K | 44.9% | 298 |
| 2026-08-27 | 37K | 77K | 48.1% | 47 |
| 2026-08-26 | 126K | 195K | 64.4% | 7 |
| 2026-08-25 | 134K | 218K | 61.1% | 20 |
| 2026-08-24 | 93K | 188K | 49.5% | 26 |
| 2026-08-21 | 63K | 170K | 36.9% | 22 |
| 2026-08-20 | 63K | 204K | 30.7% | 402 |
| 2026-08-19 | 48K | 112K | 43.2% | 327 |
| 2026-08-18 | 33K | 69K | 48.4% | 970 |
| 2026-08-17 | 36K | 78K | 47.0% | 95 |
| 2026-08-14 | 44K | 181K | 24.4% | 280 |
| 2026-08-13 | 52K | 143K | 36.2% | 791 |
| 2026-08-12 | 42K | 95K | 44.5% | 399 |
| 2026-08-11 | 58K | 194K | 30.1% | 704 |
| 2026-08-10 | 61K | 159K | 38.1% | 3,046 |
| 2026-08-07 | 80K | 206K | 38.6% | 333 |
| 2026-08-06 | 93K | 190K | 48.6% | 121 |
| 2026-08-05 | 107K | 400K | 26.7% | 4 |
| 2026-08-04 | 186K | 300K | 62.1% | 0 |
| 2026-08-03 | 121K | 264K | 45.8% | 3,350 |
| 2026-07-31 | 57K | 164K | 34.8% | 51 |
Fails to deliver
SEC, by settlement date. JSONAs of 13 August 2026, the fails-to-deliver balance in TDG is 1 share, down 39 shares over the last settlement date. Over the last 52 readings it ranged from 1 share (13 August 2026) to 32,609 shares (3 February 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-08-13 | 1 | $1235.48 | $1K |
| 2026-08-11 | 40 | $1223.48 | $49K |
| 2026-08-10 | 1,923 | $1225.25 | $2.4M |
| 2026-08-04 | 1,039 | $1285.56 | $1.3M |
| 2026-08-03 | 282 | $1254.38 | $354K |
| 2026-07-21 | 9,972 | $1204.73 | $12.0M |
| 2026-07-20 | 150 | $1214.43 | $182K |
| 2026-07-16 | 7 | $1232.18 | $9K |
| 2026-07-10 | 2 | $1295.71 | $3K |
| 2026-07-09 | 13 | $1296.43 | $17K |
| 2026-07-08 | 69 | $1329.63 | $92K |
| 2026-07-06 | 324 | $1348.49 | $437K |
| 2026-07-02 | 4,293 | $1309.18 | $5.6M |
| 2026-06-30 | 78 | $1323.44 | $103K |
| 2026-06-29 | 89 | $1324.56 | $118K |
| 2026-06-22 | 9,986 | $1328.31 | $13.3M |
| 2026-06-12 | 1,070 | $1257.59 | $1.3M |
| 2026-06-08 | 17 | $1238.74 | $21K |
| 2026-05-26 | 3 | $1213.51 | $4K |
| 2026-05-21 | 2,557 | $1198.09 | $3.1M |
| 2026-05-19 | 10,020 | $1182.35 | $11.8M |
| 2026-05-08 | 342 | $1241.98 | $425K |
| 2026-05-07 | 248 | $1233.37 | $306K |
| 2026-05-06 | 403 | $1191.33 | $480K |
| 2026-05-05 | 1,177 | $1149.72 | $1.4M |
| 2026-05-04 | 4,355 | $1154.45 | $5.0M |
| 2026-04-22 | 9,392 | $1205.67 | $11.3M |
| 2026-04-21 | 9,567 | $1274.62 | $12.2M |
| 2026-04-15 | 3 | $1296.58 | $4K |
| 2026-04-02 | 4,387 | $1173.27 | $5.1M |
Insider trades
SEC Form 4, newest first, 50 of 100 shown. JSONInsiders at TDG reported 99 open-market sells worth $57.5M in the last 90 days and no open-market buys. Sells alone are a weak signal; insiders sell for tax, diversification and estate reasons all the time. Latest filing: Howley W Nicholas on 2026-08-18.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-08-18 | Howley W Nicholas | n/a | Sell | 190 | $1241.14 | $236K | 22K |
| 2026-08-18 | Howley W Nicholas | n/a | Sell | 1K | $1240.42 | $1.6M | 22K |
| 2026-08-18 | Howley W Nicholas | n/a | Sell | 4K | $1239.17 | $4.9M | 23K |
| 2026-08-18 | Howley W Nicholas | n/a | Sell | 520 | $1238.08 | $644K | 27K |
| 2026-08-18 | Howley W Nicholas | n/a | Sell | 250 | $1236.89 | $309K | 28K |
| 2026-08-18 | Howley W Nicholas | n/a | Sell | 140 | $1236.12 | $173K | 28K |
| 2026-08-18 | Howley W Nicholas | n/a | Sell | 270 | $1234.69 | $333K | 28K |
| 2026-08-18 | Howley W Nicholas | n/a | Sell | 450 | $1233.30 | $555K | 28K |
| 2026-08-18 | Howley W Nicholas | n/a | Sell | 1K | $1232.01 | $1.3M | 29K |
| 2026-08-18 | Howley W Nicholas | n/a | Sell | 830 | $1231.12 | $1.0M | 30K |
| 2026-08-18 | Howley W Nicholas | n/a | Sell | 570 | $1230.02 | $701K | 31K |
| 2026-08-18 | Howley W Nicholas | n/a | Sell | 290 | $1229.09 | $356K | 31K |
| 2026-08-18 | Howley W Nicholas | n/a | Sell | 70 | $1227.62 | $86K | 31K |
| 2026-08-18 | Howley W Nicholas | n/a | Sell | 204 | $1225.60 | $250K | 31K |
| 2026-08-18 | Howley W Nicholas | n/a | Option exercise | 10K | $66.47 | $673K | 32K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Sell | 30 | $1253.08 | $38K | 4K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Sell | 80 | $1252.11 | $100K | 4K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Sell | 20 | $1250.82 | $25K | 4K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Sell | 60 | $1248.26 | $75K | 4K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Sell | 48 | $1247.31 | $60K | 4K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Sell | 37 | $1245.90 | $46K | 4K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Sell | 145 | $1245.29 | $181K | 4K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Sell | 100 | $1243.91 | $124K | 4K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Sell | 138 | $1243.03 | $172K | 4K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Sell | 112 | $1242.28 | $139K | 4K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Sell | 120 | $1240.78 | $149K | 4K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Sell | 400 | $1239.99 | $496K | 4K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Sell | 340 | $1238.84 | $421K | 5K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Sell | 499 | $1237.87 | $618K | 5K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Sell | 671 | $1236.80 | $830K | 6K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Sell | 373 | $1235.86 | $461K | 6K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Sell | 327 | $1234.93 | $404K | 7K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Sell | 260 | $1233.87 | $321K | 7K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Sell | 140 | $1232.82 | $173K | 7K |
| 2026-08-17 | Reiss Joel | Co-Chief Operating Officer | Option exercise | 4K | $284.97 | $1.1M | 8K |
| 2026-06-18 | Howley W Nicholas | Director | Sell | 964 | $1314.60 | $1.3M | 30K |
| 2026-06-18 | Howley W Nicholas | Director | Sell | 160 | $1310.46 | $210K | 31K |
| 2026-06-18 | Howley W Nicholas | Director | Sell | 115 | $1308.92 | $151K | 31K |
| 2026-06-18 | Howley W Nicholas | Director | Sell | 97 | $1308.05 | $127K | 31K |
| 2026-06-18 | Howley W Nicholas | Director | Sell | 112 | $1305.19 | $146K | 32K |
| 2026-06-18 | Howley W Nicholas | Director | Option exercise | 10K | $66.47 | $673K | 32K |
| 2026-06-18 | Howley W Nicholas | Director | Sell | 275 | $1333.62 | $367K | 22K |
| 2026-06-18 | Howley W Nicholas | Director | Sell | 78 | $1334.72 | $104K | 22K |
| 2026-06-18 | Howley W Nicholas | Director | Sell | 745 | $1315.71 | $980K | 29K |
| 2026-06-18 | Howley W Nicholas | Director | Sell | 1K | $1316.86 | $1.8M | 28K |
| 2026-06-18 | Howley W Nicholas | Director | Sell | 893 | $1317.75 | $1.2M | 27K |
| 2026-06-18 | Howley W Nicholas | Director | Sell | 2K | $1318.84 | $2.5M | 25K |
| 2026-06-18 | Howley W Nicholas | Director | Sell | 827 | $1319.90 | $1.1M | 24K |
| 2026-06-18 | Howley W Nicholas | Director | Sell | 268 | $1321.13 | $354K | 24K |
| 2026-06-18 | Howley W Nicholas | Director | Sell | 305 | $1321.91 | $403K | 24K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are the rarer, stronger signal.
Planned sales (Form 144)
Newest first. JSON1 Form 144 notice on file for TDG worth $47.6M at the prices reported; 1 in the last 90 days worth $47.6M. Latest: THE FORTUNA TRUST U/T/A DTD 06/01/2018 filed on 2026-08-07 to sell 37,690 shares ($47.6M) from 2026-08-07.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-08-07 | THE FORTUNA TRUST U/T/A DTD 06/01/2018Director | 38K | $47.6M | 0.068% | 2026-08-07 | Morgan Stanley Smith Barney LLC Executive Financial Services |
13F holders
Tracked managers holding TDG at their latest 13F. JSON11 of the 30 tracked managers held TDG at their latest 13F, $536.4M in total at quarter-end prices. Citadel Advisors is the largest at $233.9M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 7 added shares and 4 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Citadel Advisors | 2026-06-30 | 176K | $233.9M | 0.03% | +31K |
| Third Point | 2026-06-30 | 79K | $105.2M | 2.25% | +54K |
| Two Sigma Investments | 2026-06-30 | 47K | $62.0M | 0.04% | +45K |
| Lone Pine Capital | 2026-06-30 | 29K | $38.0M | 0.23% | -7K |
| Renaissance Technologies | 2026-06-30 | 26K | $34.1M | 0.05% | +6K |
| AQR Capital Management | 2026-06-30 | 21K | $28.4M | 0.01% | +4K |
| Millennium Management | 2026-06-30 | 15K | $19.6M | 0.01% | +8K |
| Point72 Asset Management | 2026-06-30 | 6K | $7.3M | 0.01% | -38K |
| D. E. Shaw & Co. | 2026-06-30 | 4K | $5.0M | 0.00% | -18K |
| Bridgewater Associates | 2026-06-30 | 2K | $2.5M | 0.01% | -468 |
| Fisher Asset Management | 2026-06-30 | 317 | $423K | 0.00% | +29 |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
Financials
SEC XBRL, as filed. JSONIn Q2 2026 (quarter ended 2026-06-27) TransDigm Group INC reported revenue of $2.74B, up 22.5% from the same quarter a year earlier, and net income of $539.0M (9.39 diluted EPS). In FY 2025 it generated $2.04B of operating cash flow and spent $500.0M on buybacks and $159.0M on dividends. As of 2026-06-27, cash was $2.77B against $32.76B of debt.
- Cash
- $2.77B
- Debt
- $32.76B
- Equity
- -$9.81B
- Total assets
- $26.75B
- Shares outstanding
- 55,276,525
Quarterly, last 8 quarters
| Quarter | Period end | Revenue | Net income | Margin | Diluted EPS |
|---|---|---|---|---|---|
| Q2 2026 | 2026-06-27 | $2.74B | $539.0M | 19.7% | 9.39 |
| Q1 2026 | 2026-03-28 | $2.54B | $535.0M | 21.0% | 9.20 |
| Q4 2025 | 2025-12-27 | $2.29B | $445.0M | 19.5% | 6.62 |
| Q4 2025derived | 2025-09-30 | $2.44B | $610.0M | 25.0% | n/a |
| Q2 2025 | 2025-06-28 | $2.24B | $492.0M | 22.0% | 8.47 |
| Q1 2025 | 2025-03-29 | $2.15B | $479.0M | 22.3% | 8.24 |
| Q4 2024 | 2024-12-28 | $2.01B | $493.0M | 24.6% | 7.62 |
| Q4 2024derived | 2024-09-30 | $2.19B | $468.0M | 21.4% | n/a |
Fiscal years, with buybacks and dividends
| Fiscal year | Ends | Revenue | Net income | Operating cash flow | Capex | Buybacks | Dividends |
|---|---|---|---|---|---|---|---|
| FY 2025 | 2025-09-30 | $8.83B | $2.07B | $2.04B | $222.0M | $500.0M | $159.0M |
| FY 2024 | 2024-09-30 | $7.94B | $1.71B | $2.04B | $165.0M | $0 | $2.04B |
| FY 2023 | 2023-09-30 | $6.58B | $1.30B | $1.38B | $139.0M | $0 | $38.0M |
| FY 2022 | 2022-09-30 | $5.43B | $866.0M | $948.0M | $119.0M | $912.0M | $1.09B |
| FY 2021 | 2021-09-30 | $4.80B | $680.0M | $913.0M | $105.0M | $0 | $73.0M |
Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are cash paid to repurchase common stock in the year (XBRL PaymentsForRepurchaseOfCommonStock), not authorizations. Balance sheet lines are as of 2026-06-27; shares outstanding as of 2026-07-31 from the cover page.
What this page is
TransDigm Group INC in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page pulls every series the site collects for one ticker onto one URL, keyed by the SEC's own ticker list, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a summary sentence built from the rows (last value, change, range with dates) and its own JSON and CSV links. Nothing on the page is written by a model; the sentences change only when the data does. A page exists only for companies with data in at least two series, and every section says when its source last updated.
This page follows TransDigm Group INC (TDG), SEC CIK 1260221, listed on NYSE, classified by the SEC as aircraft parts & auxiliary equipment, nec. The cross-market tables live on the short interest and insider transactions hubs.
Source and method
- Short interest
- FINRA consolidated short interestTwice a month, about eight business days after settlement. Latest 2026-08-31.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesEvery trading day, loaded the following morning. Latest 2026-09-11.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataTwice a month, a few weeks after the half month ends. Latest 2026-08-13.JSON and CSV
- Planned sales
- SEC EDGAR Form 144EDGAR read every 30 minutes; a notice is filed on or before the sell order. Latest 2026-08-07.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRQuarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Financials
- SEC XBRL company factsRefreshed weekly from the SEC's structured data; values are as filed in the 10-Q and 10-K. Latest 2026-06-27.JSON and CSV
- Insider trades
- SEC EDGAR Form 4EDGAR read every 30 minutes; filings are due two business days after the trade. Latest 2026-08-18.JSON and CSV
- Company record
- EDGAR filing index for CIK 1260221Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 30 requests a minute without a key, 120 a minute with a key from a free account.
Data checks. Every dataset is checked against its source once a day. This dataset passed the last run, 14 Sep 05:40 UTC.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a crowded short are the combination that has historically preceded squeezes; insider sells next to a crowded short are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
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Datasets
Frequently Asked Questions
How much of TDG is sold short?
What is TDG's daily short volume?
Does TDG have fails to deliver?
Are TDG insiders buying or selling?
Have TDG insiders filed to sell?
What did TDG report last quarter?
Which funds hold TDG?
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.