ADTRAN Holdings (ADTN)
ADTRAN Holdings on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as telephone & telegraph apparatus.
12.5M
Short interest
settlement 2026-10-15
7.2
Days to cover
unchanged vs prior
58.6%
Short share of volume
2026-11-02
3,054
Fails to deliver
settlement 2026-09-30
Tue 3 Nov
Next earnings
estimated date
$50K
Insider flow, 90 days
1 buys, 0 sells
As of 2026-11-02.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 15 October 2026, short interest in ADTN is 12,549,794 shares, up 12,971 shares over the last month. Over the last 48 readings it ranged from 956,026 shares (31 January 2025) to 12,917,550 shares (31 August 2026). The latest reading sits at the top of that range. At the reported average volume of 1.7M shares a day that is 7.2 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 12,549,794 | +5.8% | 1,733,349 | 7.24 |
| 2026-09-30 | 11,862,717 | -5.4% | 1,646,917 | 7.20 |
| 2026-09-15 | 12,536,823 | -3.0% | 1,561,898 | 8.03 |
| 2026-08-31 | 12,917,550 | +9.6% | 1,673,330 | 7.72 |
| 2026-08-14 | 11,785,700 | +10.7% | 2,557,518 | 4.61 |
| 2026-07-31 | 10,646,986 | -16.1% | 2,536,769 | 4.20 |
| 2026-07-15 | 12,697,742 | +0.9% | 1,374,561 | 9.24 |
| 2026-06-30 | 12,579,189 | +4.5% | 2,312,826 | 5.44 |
| 2026-06-15 | 12,043,250 | +4.8% | 2,651,708 | 4.54 |
| 2026-05-29 | 11,495,405 | +0.2% | 2,907,926 | 3.95 |
| 2026-05-15 | 11,474,947 | +2.9% | 3,053,042 | 3.76 |
| 2026-04-30 | 11,148,705 | +17.5% | 2,702,021 | 4.13 |
| 2026-04-15 | 9,489,805 | +15.7% | 2,407,352 | 3.94 |
| 2026-03-31 | 8,203,823 | -2.3% | 2,153,575 | 3.81 |
| 2026-03-13 | 8,400,286 | +13.0% | 1,048,350 | 8.01 |
| 2026-02-27 | 7,433,146 | -7.3% | 1,575,924 | 4.72 |
| 2026-02-13 | 8,014,076 | +23.5% | 1,079,979 | 7.42 |
| 2026-01-30 | 6,490,309 | -15.0% | 1,275,803 | 5.09 |
| 2026-01-15 | 7,638,464 | -6.8% | 1,014,281 | 7.53 |
| 2025-12-31 | 8,199,502 | -4.9% | 1,086,346 | 7.55 |
| 2025-12-15 | 8,623,856 | +1.5% | 1,479,146 | 5.83 |
| 2025-11-28 | 8,494,840 | -1.6% | 1,278,224 | 6.65 |
| 2025-11-14 | 8,637,284 | +7.7% | 2,447,289 | 3.53 |
| 2025-10-31 | 8,023,601 | +12.1% | 1,623,610 | 4.94 |
| 2025-10-15 | 7,160,150 | +8.2% | 1,306,485 | 5.48 |
| 2025-09-30 | 6,620,349 | +316.4% | 3,656,919 | 1.81 |
| 2025-09-15 | 1,590,042 | -1.1% | 883,470 | 1.80 |
| 2025-08-29 | 1,606,877 | -6.4% | 692,999 | 2.32 |
| 2025-08-15 | 1,716,055 | -11.2% | 1,267,465 | 1.35 |
| 2025-07-31 | 1,932,782 | -4.6% | 1,303,176 | 1.48 |
| 2025-07-15 | 2,026,244 | -4.6% | 926,576 | 2.19 |
| 2025-06-30 | 2,124,425 | +16.4% | 1,454,112 | 1.46 |
| 2025-06-13 | 1,825,895 | +7.3% | 720,613 | 2.53 |
| 2025-05-30 | 1,701,449 | -13.9% | 666,564 | 2.55 |
| 2025-05-15 | 1,976,847 | -13.3% | 1,058,826 | 1.87 |
| 2025-04-30 | 2,279,693 | +20.9% | 690,184 | 3.30 |
| 2025-04-15 | 1,885,906 | -7.1% | 1,059,927 | 1.78 |
| 2025-03-31 | 2,030,998 | +39.5% | 997,256 | 2.04 |
| 2025-03-14 | 1,456,390 | +26.5% | 1,484,487 | 1.00 |
| 2025-02-28 | 1,150,921 | +5.7% | 1,461,467 | 1.00 |
| 2025-02-14 | 1,088,599 | +13.9% | 1,283,143 | 1.00 |
| 2025-01-31 | 956,026 | -28.9% | 1,139,667 | 1.00 |
| 2025-01-15 | 1,344,477 | -17.6% | 1,084,601 | 1.24 |
| 2024-12-31 | 1,632,231 | +41.0% | 599,896 | 2.72 |
| 2024-12-13 | 1,158,007 | -5.0% | 498,964 | 2.32 |
| 2024-11-29 | 1,218,264 | -35.7% | 705,965 | 1.73 |
| 2024-11-15 | 1,895,614 | -9.6% | 950,656 | 1.99 |
| 2024-10-31 | 2,097,247 | -7.5% | 361,868 | 5.80 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 2 November 2026, the short share of ADTN volume is 58.6%, up 18.7 points over the last five sessions. Over the last 30 readings it ranged from 23.1% (29 October 2026) to 63.3% (20 October 2026). The latest reading is 16.7 points above the 30-session average of 41.9%, on 604K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-02 | 354K | 604K | 58.6% | 1,024 |
| 2026-10-30 | 175K | 346K | 50.4% | 955 |
| 2026-10-29 | 79K | 341K | 23.1% | 0 |
| 2026-10-28 | 116K | 465K | 24.8% | 0 |
| 2026-10-27 | 235K | 648K | 36.4% | 0 |
| 2026-10-26 | 546K | 1.4M | 39.9% | 300 |
| 2026-10-23 | 88K | 335K | 26.4% | 1,250 |
| 2026-10-22 | 121K | 340K | 35.7% | 172 |
| 2026-10-21 | 122K | 357K | 34.2% | 142 |
| 2026-10-20 | 721K | 1.1M | 63.3% | 1,913 |
| 2026-10-19 | 172K | 414K | 41.6% | 300 |
| 2026-10-16 | 203K | 411K | 49.5% | 0 |
| 2026-10-15 | 194K | 521K | 37.2% | 0 |
| 2026-10-14 | 268K | 609K | 44.1% | 126 |
| 2026-10-13 | 167K | 377K | 44.2% | 70 |
| 2026-10-12 | 241K | 443K | 54.3% | 2,098 |
| 2026-10-09 | 89K | 215K | 41.6% | 0 |
| 2026-10-08 | 301K | 552K | 54.4% | 3,300 |
| 2026-10-07 | 454K | 931K | 48.8% | 7,308 |
| 2026-10-06 | 425K | 1.1M | 39.7% | 3,532 |
| 2026-10-05 | 230K | 817K | 28.1% | 0 |
| 2026-10-02 | 312K | 996K | 31.3% | 769 |
| 2026-10-01 | 159K | 430K | 37.0% | 20 |
| 2026-09-30 | 157K | 407K | 38.7% | 20 |
| 2026-09-29 | 240K | 453K | 52.8% | 620 |
| 2026-09-28 | 170K | 352K | 48.1% | 3,804 |
| 2026-09-25 | 158K | 419K | 37.6% | 404 |
| 2026-09-24 | 203K | 430K | 47.2% | 717 |
| 2026-09-23 | 183K | 368K | 49.7% | 1 |
| 2026-09-22 | 197K | 497K | 39.6% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 30 September 2026, the fails-to-deliver balance in ADTN is 3,054 shares, up 3,038 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (23 July 2026) to 769,711 shares (1 July 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-30 | 3,054 | $6.87 | $21K |
| 2026-09-23 | 16 | $7.29 | $117 |
| 2026-09-22 | 416 | $7.21 | $3K |
| 2026-09-17 | 3,579 | $7.09 | $25K |
| 2026-09-03 | 18,017 | $7.52 | $135K |
| 2026-08-31 | 29,676 | $7.72 | $229K |
| 2026-08-26 | 8,467 | $8.02 | $68K |
| 2026-08-24 | 3,541 | $7.77 | $28K |
| 2026-08-03 | 62 | $8.51 | $528 |
| 2026-07-23 | 1 | $10.45 | $10 |
| 2026-07-16 | 273 | $11.88 | $3K |
| 2026-07-09 | 254 | $12.87 | $3K |
| 2026-07-08 | 83 | $12.54 | $1K |
| 2026-07-02 | 764,542 | $13.64 | $10.4M |
| 2026-07-01 | 769,711 | $13.90 | $10.7M |
| 2026-06-18 | 190 | $15.09 | $3K |
| 2026-06-11 | 17,102 | $14.95 | $256K |
| 2026-05-26 | 9,648 | $15.67 | $151K |
| 2026-05-18 | 112 | $14.91 | $2K |
| 2026-05-15 | 2,740 | $15.28 | $42K |
| 2026-05-14 | 1,210 | $15.77 | $19K |
| 2026-05-13 | 14,794 | $15.04 | $223K |
| 2026-05-08 | 891 | $14.55 | $13K |
| 2026-05-05 | 12,551 | $18.34 | $230K |
| 2026-04-22 | 3,000 | $17.50 | $53K |
| 2026-04-20 | 619 | $16.96 | $10K |
| 2026-04-14 | 952 | $14.97 | $14K |
| 2026-04-07 | 28,863 | $12.93 | $373K |
| 2026-03-31 | 538 | $12.19 | $7K |
| 2026-03-27 | 67 | $12.97 | $869 |
Insider trades
SEC Form 4, newest first. JSONInsiders at ADTN reported 1 open-market buy worth $50K in the last 90 days and no open-market sells. Latest filing: Terlinde Christian (Director) on 2026-10-27.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-10-27 | Terlinde Christian | Director | Grant | 9K | $0.00 | $0 | 9K |
| 2026-08-10 | Glingener Christoph | Chief Technology Officer | Grant | 28K | $0.00 | $0 | 84K |
| 2026-08-06 | Santo Timothy P | SVP of Finance; CFO | Buy | 7K | $7.60 | $50K | 60K |
| 2026-07-24 | Glingener Christoph | Chief Technology Officer | Grant | 9K | $0.00 | $0 | 56K |
| 2026-07-01 | DelSanto Anne | Director | Grant | 4K | $0.00 | $0 | 4K |
| 2026-05-20 | Wilson James Denson Jr | Chief Revenue Officer | Gift | 10K | $0.00 | $0 | 133K |
| 2026-05-20 | Wilson James Denson Jr | Chief Revenue Officer | Sell | 9K | $14.72 | $137K | 143K |
| 2026-05-08 | Glingener Christoph | Chief Technology Officer | Sell | 22K | $15.00 | $334K | 47K |
| 2026-05-08 | Glingener Christoph | Chief Technology Officer | Exercise or conversion | 22K | $12.17 | $271K | 69K |
| 2026-05-07 | Glingener Christoph | Chief Technology Officer | Sell | 85K | $15.06 | $1.3M | 47K |
| 2026-05-07 | Glingener Christoph | Chief Technology Officer | Exercise or conversion | 85K | $12.17 | $1.0M | 132K |
| 2026-05-07 | Glingener Christoph | Chief Technology Officer | Sell | 41K | $14.73 | $607K | 47K |
| 2026-05-07 | Glingener Christoph | Chief Technology Officer | Exercise or conversion | 41K | $7.01 | $289K | 88K |
| 2026-04-01 | Wilson James Denson Jr | Chief Revenue Officer | Grant | 25K | $0.00 | $0 | 153K |
| 2026-04-01 | Santo Timothy P | SVP of Finance; CFO | Grant | 28K | $0.00 | $0 | 53K |
| 2026-04-01 | STANTON THOMAS R | Chairman & CEO | Grant | 171K | $0.00 | $0 | 1.1M |
| 2026-03-19 | Santo Timothy P | SVP of Finance; CFO | Tax withholding | 2K | $11.90 | $18K | 25K |
| 2026-03-04 | Jacqueline Hourigan Rice | Director | Sell | 14K | $10.29 | $148K | 14K |
| 2026-01-26 | Wilson James Denson Jr | Chief Revenue Officer | Tax withholding | 1K | $9.24 | $12K | 128K |
| 2026-01-26 | Wilson James Denson Jr | Chief Revenue Officer | Tax withholding | 998 | $9.73 | $10K | 125K |
| 2026-01-26 | STANTON THOMAS R | Chairman & CEO | Tax withholding | 14K | $9.73 | $140K | 940K |
| 2026-01-26 | Wilson James Denson Jr | Chief Revenue Officer | Tax withholding | 1K | $9.24 | $10K | 128K |
| 2026-01-26 | Wilson James Denson Jr | Chief Revenue Officer | Grant | 4K | $0.00 | $0 | 129K |
| 2026-01-26 | STANTON THOMAS R | Chairman & CEO | Tax withholding | 12K | $9.24 | $115K | 955K |
| 2026-01-26 | STANTON THOMAS R | Chairman & CEO | Grant | 28K | $0.00 | $0 | 968K |
| 2026-01-24 | Wilson James Denson Jr | Chief Revenue Officer | Tax withholding | 1K | $9.55 | $12K | 126K |
| 2026-01-24 | STANTON THOMAS R | Chairman & CEO | Tax withholding | 18K | $9.55 | $167K | 954K |
| 2026-01-20 | Wilson James Denson Jr | Chief Revenue Officer | Tax withholding | 765 | $9.24 | $7K | 127K |
| 2026-01-20 | STANTON THOMAS R | Chairman & CEO | Tax withholding | 10K | $9.24 | $95K | 972K |
| 2025-12-31 | Walker Kathryn A | Director | Grant | 14K | $0.00 | $0 | 99K |
| 2025-12-31 | Theodosopoulos Nikos | Director | Grant | 14K | $0.00 | $0 | 66K |
| 2025-12-31 | McCray Gregory James | Director | Grant | 14K | $0.00 | $0 | 73K |
| 2025-12-31 | Nair Balan | Director | Grant | 14K | $0.00 | $0 | 125K |
| 2025-12-31 | HUSS H FENWICK | Director | Grant | 14K | $0.00 | $0 | 108K |
| 2025-12-31 | Jacqueline Hourigan Rice | Director | Grant | 14K | $0.00 | $0 | 28K |
| 2025-11-28 | Santo Timothy P | SVP of Finance; CFO | Buy | 6K | $8.02 | $49K | 27K |
| 2025-11-26 | Theodosopoulos Nikos | Director | Buy | 13K | $7.81 | $100K | 52K |
| 2025-11-24 | STANTON THOMAS R | Chairman & CEO | Buy | 41K | $7.33 | $300K | 982K |
| 2025-11-17 | Wilson James Denson Jr | Chief Revenue Officer | Tax withholding | 468 | $7.33 | $3K | 128K |
| 2025-11-17 | STANTON THOMAS R | Chairman & CEO | Tax withholding | 3K | $7.33 | $25K | 941K |
| 2025-07-13 | STANTON THOMAS R | Chairman & CEO | Tax withholding | 6K | $9.20 | $52K | 945K |
| 2025-04-13 | STANTON THOMAS R | Chairman & CEO | Tax withholding | 5K | $7.62 | $41K | 950K |
| 2025-03-19 | Santo Timothy P | SVP of Finance; CFO | Grant | 20K | $0.00 | $0 | 20K |
| 2025-01-26 | STANTON THOMAS R | Chairman & CEO | Tax withholding | 10K | $10.31 | $98K | 956K |
| 2025-01-26 | Dopfer Ulrich | Chief Financial Officer | Tax withholding | 1K | $10.31 | $12K | 48K |
| 2025-01-26 | Wilson James Denson Jr | Chief Revenue Officer | Tax withholding | 845 | $10.31 | $9K | 129K |
| 2025-01-24 | STANTON THOMAS R | Chairman & CEO | Grant | 40K | $0.00 | $0 | 816K |
| 2025-01-24 | STANTON THOMAS R | Chairman & CEO | Grant | 39K | $0.00 | $0 | 816K |
| 2025-01-24 | STANTON THOMAS R | Chairman & CEO | Tax withholding | 10K | $10.31 | $106K | 805K |
| 2025-01-24 | STANTON THOMAS R | Chairman & CEO | Grant | 160K | $0.00 | $0 | 965K |
| 2025-01-24 | Dopfer Ulrich | Chief Financial Officer | Tax withholding | 5K | $10.31 | $48K | 33K |
| 2025-01-24 | Dopfer Ulrich | Chief Financial Officer | Grant | 16K | $0.00 | $0 | 38K |
| 2025-01-24 | Dopfer Ulrich | Chief Financial Officer | Grant | 16K | $0.00 | $0 | 49K |
| 2025-01-24 | Glingener Christoph | Chief Technology Officer | Grant | 14K | $0.00 | $0 | 33K |
| 2025-01-24 | Glingener Christoph | Chief Technology Officer | Grant | 14K | $0.00 | $0 | 47K |
| 2025-01-24 | Wilson James Denson Jr | Chief Revenue Officer | Grant | 14K | $0.00 | $0 | 130K |
| 2025-01-24 | Wilson James Denson Jr | Chief Revenue Officer | Grant | 16K | $0.00 | $0 | 120K |
| 2025-01-24 | Wilson James Denson Jr | Chief Revenue Officer | Tax withholding | 4K | $10.31 | $43K | 115K |
| 2025-01-20 | STANTON THOMAS R | Chairman & CEO | Tax withholding | 6K | $10.19 | $65K | 776K |
| 2025-01-20 | Wilson James Denson Jr | Chief Revenue Officer | Tax withholding | 765 | $10.19 | $8K | 103K |
| 2025-01-13 | STANTON THOMAS R | Chairman & CEO | Tax withholding | 6K | $10.01 | $60K | 783K |
| 2024-12-31 | Nair Balan | Director | Grant | 14K | $0.00 | $0 | 112K |
| 2024-12-31 | Jacqueline Hourigan Rice | Director | Grant | 14K | $0.00 | $0 | 31K |
| 2024-12-31 | Jacqueline Hourigan Rice | Director | Gift | 16K | $0.00 | $0 | 14K |
| 2024-12-31 | Walker Kathryn A | Director | Grant | 14K | $0.00 | $0 | 85K |
| 2024-12-31 | HUSS H FENWICK | Director | Grant | 14K | $0.00 | $0 | 94K |
| 2024-12-31 | McCray Gregory James | Director | Grant | 14K | $0.00 | $0 | 59K |
| 2024-12-31 | Theodosopoulos Nikos | Director | Grant | 14K | $0.00 | $0 | 39K |
| 2024-11-17 | STANTON THOMAS R | Chairman & CEO | Tax withholding | 17K | $7.75 | $130K | 789K |
| 2024-11-17 | Wilson James Denson Jr | Chief Revenue Officer | Tax withholding | 2K | $7.75 | $18K | 104K |
| 2024-11-16 | STANTON THOMAS R | Chairman & CEO | Tax withholding | 6K | $7.75 | $43K | 805K |
| 2024-11-16 | Wilson James Denson Jr | Chief Revenue Officer | Tax withholding | 794 | $7.75 | $6K | 107K |
| 2024-10-13 | STANTON THOMAS R | Chairman & CEO | Tax withholding | 4K | $5.91 | $22K | 811K |
| 2024-07-13 | STANTON THOMAS R | Chairman & CEO | Tax withholding | 73K | $5.78 | $419K | 784K |
| 2024-07-13 | STANTON THOMAS R | Chairman & CEO | Tax withholding | 42K | $5.78 | $242K | 815K |
| 2024-05-24 | Glingener Christoph | Chief Technology Officer | Tax withholding | 801 | $5.27 | $4K | 19K |
| 2024-05-24 | Dopfer Ulrich | Chief Financial Officer | Tax withholding | 953 | $5.27 | $5K | 21K |
| 2024-01-26 | STANTON THOMAS R | Chairman & CEO | Grant | 130K | $0.00 | $0 | 857K |
| 2024-01-26 | Dopfer Ulrich | Chief Financial Officer | Grant | 13K | $0.00 | $0 | 22K |
| 2024-01-26 | Glingener Christoph | Chief Technology Officer | Grant | 12K | $0.00 | $0 | 20K |
| 2024-01-26 | Wilson James Denson Jr | Chief Revenue Officer | Grant | 12K | $0.00 | $0 | 107K |
| 2024-01-20 | STANTON THOMAS R | Chairman & CEO | Tax withholding | 11K | $7.03 | $76K | 727K |
| 2024-01-20 | Wilson James Denson Jr | Chief Revenue Officer | Tax withholding | 1K | $7.03 | $8K | 96K |
| 2023-12-31 | Jacqueline Hourigan Rice | Director | Exercise or conversion | 168 | price not stated in the filing | not stated | 7K |
| 2023-12-31 | Jacqueline Hourigan Rice | Director | Returned to company | 0 | $7.34 | $3 | 7K |
| 2023-12-31 | Jacqueline Hourigan Rice | Director | Grant | 16K | $0.00 | $0 | 23K |
| 2023-12-31 | Jacqueline Hourigan Rice | Director | Gift | 7K | $0.00 | $0 | 16K |
| 2023-12-31 | Theodosopoulos Nikos | Director | Grant | 16K | $0.00 | $0 | 25K |
| 2023-12-31 | Theodosopoulos Nikos | Director | Exercise or conversion | 168 | price not stated in the filing | not stated | 9K |
| 2023-12-31 | Theodosopoulos Nikos | Director | Returned to company | 0 | $7.34 | $3 | 9K |
| 2023-12-31 | Walker Kathryn A | Director | Grant | 16K | $0.00 | $0 | 70K |
| 2023-12-31 | Walker Kathryn A | Director | Exercise or conversion | 168 | price not stated in the filing | not stated | 54K |
| 2023-12-31 | Walker Kathryn A | Director | Returned to company | 0 | $7.34 | $3 | 54K |
| 2023-12-31 | HUSS H FENWICK | Director | Returned to company | 0 | $7.34 | $3 | 63K |
| 2023-12-31 | HUSS H FENWICK | Director | Grant | 16K | $0.00 | $0 | 79K |
| 2023-12-31 | HUSS H FENWICK | Director | Exercise or conversion | 168 | price not stated in the filing | not stated | 63K |
| 2023-12-31 | Nair Balan | Director | Returned to company | 0 | $7.34 | $3 | 81K |
| 2023-12-31 | Nair Balan | Director | Grant | 16K | $0.00 | $0 | 97K |
| 2023-12-31 | Nair Balan | Director | Exercise or conversion | 168 | price not stated in the filing | not stated | 81K |
| 2023-12-31 | Protiva Brian | Director | Exercise or conversion | 168 | price not stated in the filing | not stated | 237K |
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 rarer.
Planned sales (Form 144)
Newest first. JSON3 Form 144 notices on file for ADTN worth $2.6M at the prices reported; 0 in the last 90 days worth $0. Latest: JAMES D WILSON JR filed on 2026-05-20 to sell 9,332 shares ($137K) from 2026-05-20.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-05-20 | JAMES D WILSON JROfficer | 9K | $137K | 0.012% | 2026-05-20 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-07 | CHRISTOPH GLINGENEROfficer | 148K | $2.3M | 0.183% | 2026-05-07 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-04 | JACQUELINE H RICEDirector | 14K | $148K | 0.018% | 2026-03-04 | Morgan Stanley Smith Barney LLC Executive Financial Services |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON2 holders report 5% or more of ADTN in their latest filing, all on Schedule 13G (passive). The largest reported stake is Vanguard Portfolio Management at 6.0% of the class (4,868,836 shares), filed 2026-04-28 for an event on 2026-03-31.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-10-30 | 13G | Vanguard Capital Managementinvestment adviser | 4.2M | 5.1% | 2026-09-30 |
| 2026-04-28 | 13G | Vanguard Portfolio Managementinvestment adviser | 4.9M | 6.0% | 2026-03-31 |
| 2026-03-26 | 13G/Ano. 18 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
| 2026-03-18 | 13G/Ano. 1 | EGORA Ventures AGcorporation | 4.0M | 5.0% | 2026-02-02 |
| 2025-11-14 | 13G/Ano. 5 | Divisar Capital Management LLCinvestment adviser, other entity, parent holding company | 3.2M | 4.0% | 2025-09-30 |
| 2025-11-14 | 13G/Ano. 5 | Steven Baughmanindividual, parent holding company | 3.2M | 4.0% | 2025-09-30 |
13F holders
Tracked managers holding ADTN at their latest 13F. JSON7 of the 30 tracked managers held ADTN at their latest 13F, $138.3M in total at quarter-end prices. Two Sigma Investments is the largest at $40.3M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 4 added shares and 3 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Two Sigma Investments | 2026-06-30 | 2.9M | $40.3M | 0.03% | +1.8M |
| Millennium Management | 2026-06-30 | 2.7M | $37.8M | 0.01% | +826K |
| Renaissance Technologies | 2026-06-30 | 1.8M | $24.7M | 0.03% | +1.6M |
| D. E. Shaw & Co. | 2026-06-30 | 1.1M | $15.2M | 0.01% | -127K |
| Point72 Asset Management | 2026-06-30 | 765K | $10.6M | 0.01% | +200K |
| AQR Capital Management | 2026-06-30 | 671K | $9.3M | 0.00% | -173K |
| Citadel Advisors | 2026-06-30 | 30K | $412K | 0.00% | -364K |
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 FY 2026 (quarter ended 2026-06-30) ADTRAN Holdings reported revenue of $281.1M, up 6.1% from the same quarter a year earlier, and net loss of $10.9M (-0.13 diluted EPS). In FY 2025 it generated $129.8M of operating cash flow.
- Cash
- $79.2M
- Total assets
- $1.15B
- Shares outstanding
- 81,481,407
Quarterly, last 8 quarters
| Quarter | Period end | Revenue | Net income | Margin | Diluted EPS |
|---|---|---|---|---|---|
| Q2 FY 2026 | 2026-06-30 | $281.1M | -$10.9M | -3.9% | -0.13 |
| Q1 FY 2026 | 2026-03-31 | $286.1M | -$1.3M | -0.5% | -0.01 |
| Q4 FY 2025derived | 2025-12-31 | $291.6M | -$3.6M | -1.2% | n/a |
| Q3 FY 2025 | 2025-09-30 | $279.4M | -$10.3M | -3.7% | -0.12 |
| Q2 FY 2025 | 2025-06-30 | $265.1M | -$20.5M | -7.7% | -0.24 |
| Q1 FY 2025 | 2025-03-31 | $247.7M | -$11.3M | -4.5% | -0.14 |
| Q4 FY 2024 | 2024-12-31 | $242.9M | -$46.1M | -19.0% | -0.58 |
| Q3 FY 2024 | 2024-09-30 | $227.7M | -$33.3M | -14.6% | -0.38 |
Fiscal years, with buybacks and dividends
| Fiscal year | Ends | Revenue | Net income | Operating cash flow | Capex | Buybacks | Dividends |
|---|---|---|---|---|---|---|---|
| FY 2025 | 2025-12-31 | $1.08B | -$45.7M | $129.8M | $31.7M | n/a | n/a |
| FY 2024 | 2024-12-31 | $922.7M | -$459.9M | $103.6M | $34.5M | n/a | $0 |
| FY 2023 | 2023-12-31 | $1.15B | -$268.9M | -$43.0M | $36.3M | n/a | $21.2M |
| FY 2022 | 2022-12-31 | $1.03B | -$2.0M | -$44.2M | $17.1M | n/a | $22.9M |
| FY 2021 | 2021-12-31 | $563.0M | -$8.6M | $3.0M | $5.7M | n/a | $17.5M |
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 the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-08-03 from the cover page.
What this page is
ADTRAN Holdings 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 puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, 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 one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows ADTRAN Holdings (ADTN), SEC CIK 926282, listed on Nasdaq, classified by the SEC as telephone & telegraph apparatus. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-11-02.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-30.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-05-20.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-10-30.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Financials
- SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-04.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-10-27.JSON and CSV
- Company record
- EDGAR filing index for CIK 926282Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
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 large short position are rare and stand out; insider sells next to one 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 ADTN is sold short?
12,549,794 shares were held short at the 2026-10-15 settlement, 7.2 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is ADTN's daily short volume?
On 2026-11-02, 353,988 of the 603,845 ADTN shares reported to FINRA were sold short, 58.6% of the day's reported volume. Short volume is a flow for one day, not a position.
Does ADTN have fails to deliver?
The SEC's latest file shows 3,054 ADTN shares failed to deliver at settlement 2026-09-30. Fails are reported per settlement date and published twice a month with a lag.
Are ADTN insiders buying or selling?
Insiders at ADTN reported 1 open-market buy worth $50K in the last 90 days and no open-market sells. Latest filing: Terlinde Christian (Director) on 2026-10-27.
Have ADTN insiders filed to sell?
3 Form 144 notices on file for ADTN worth $2.6M at the prices reported; 0 in the last 90 days worth $0. Latest: JAMES D WILSON JR filed on 2026-05-20 to sell 9,332 shares ($137K) from 2026-05-20.
Who owns 5% or more of ADTN?
2 holders report 5% or more of ADTN in their latest filing, all on Schedule 13G (passive). The largest reported stake is Vanguard Portfolio Management at 6.0% of the class (4,868,836 shares), filed 2026-04-28 for an event on 2026-03-31.
What did ADTN report last quarter?
In Q2 FY 2026 (quarter ended 2026-06-30) ADTRAN Holdings reported revenue of $281.1M, up 6.1% from the same quarter a year earlier, and net loss of $10.9M (-0.13 diluted EPS). In FY 2025 it generated $129.8M of operating cash flow.
Which tracked 13F managers own ADTN?
7 of the 30 tracked 13F managers held ADTN shares at their latest filing, $138.3M in all. The largest: Two Sigma Investments (2.9M shares, $40.3M), Izzy Englander's Millennium Management (2.7M shares, $37.8M), Renaissance Technologies (1.8M shares, $24.7M), D. E. Shaw & Co. (1.1M shares, $15.2M), Steve Cohen's Point72 Asset Management (765K shares, $10.6M), Cliff Asness's AQR Capital Management (671K shares, $9.3M). The table above lists all 7.
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.