ADTNNasdaqTelephone & Telegraph ApparatusFiscal year ends December 31
ADTRAN Holdings, Inc.
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 4, 2026
$6.43+0.12 (+1.90%)
Close on Oct 19, 2026
- Market cap
- $520.50M
- P/E (TTM)
- –
- Dividend yield
- –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
100.0%
86M of 81M shares
Institutional holders
249
52 new, 28 sold out
Net institutional buying
7M
In Q2 2026
Insider trades, 12 months
4 buys · 5 sales
Net sold $2.01M
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| BlackRock, Inc. | 6,603,046 | 8.30% | 13G (passive) amendment | Jun 30, 2024 |
| EGORA Ventures AG (f/k/a EGORA Holding GmbH) | 5,357,343 | 6.73% | 13G (passive) | Feb 14, 2025 |
| Vanguard Portfolio Management | 4,868,836 | 6.03% | 13G (passive) | Mar 31, 2026 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of ADTN | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| BlackRock, Inc. | 7,836,196 | 9.62% | $108.92M | −4,058 | 0.00% |
| Vanguard Portfolio Management LLC | 5,135,649 | 6.30% | $71.39M | +364,197 | 0.00% |
| Vanguard Capital Management LLC | 3,510,271 | 4.31% | $48.79M | +84,041 | 0.00% |
| State Street Corp | 3,082,794 | 3.78% | $42.85M | +732,057 | 0.00% |
| Royce & Associates LP | 2,972,917 | 3.65% | $41.32M | −154,486 | 0.33% |
| UBS Group AG | 2,940,724 | 3.61% | $40.88M | +2,691,567 | 0.01% |
| Two Sigma Investments, LP | 2,896,353 | 3.55% | $40.26M | +1,772,829 | 0.03% |
| Millennium Management LLC | 2,722,820 | 3.34% | $37.85M | +826,409 | 0.01% |
| JPMorgan Chase & Co | 2,623,057 | 3.22% | $36.07M | +1,104,360 | 0.00% |
| DnB Asset Management AS | 2,619,389 | 3.21% | $36.41M | −504,290 | 0.10% |
| First Eagle Investment Management, LLC | 2,497,014 | 3.06% | $34.71M | +1,128,307 | 0.03% |
| Geode Capital Management, LLC | 1,958,052 | 2.40% | $27.22M | +138,929 | 0.00% |
| Assenagon Asset Management S.A. | 1,835,508 | 2.25% | $25.51M | +1,377,556 | 0.02% |
| Morgan Stanley | 1,792,752 | 2.20% | $24.92M | −40,120 | 0.00% |
| Renaissance Technologies LLC | 1,773,740 | 2.18% | $24.65M | +1,570,841 | 0.03% |
| Boston Partners | 1,651,038 | 2.03% | $22.72M | +469,724 | 0.02% |
| Qube Research & Technologies Ltd | 1,398,913 | 1.72% | $19.44M | +1,128,968 | 0.02% |
| Dimensional Fund Advisors LP | 1,366,243 | 1.68% | $18.99M | +29,215 | 0.00% |
| William Blair Investment Management, LLC | 1,099,019 | 1.35% | $15.28M | −890,511 | 0.05% |
| D. E. Shaw & Co., Inc. | 1,091,898 | 1.34% | $15.18M | −127,071 | 0.01% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 249 | 86M | 100.0% | 52 / 94 | 74 / 28 | 22M | 15M |
| Q1 2026 | 228 | 79M | 96.9% | 50 / 87 | 64 / 31 | 27M | 10M |
| Q4 2025 | 213 | 70M | 86.4% | 26 / 71 | 82 / 31 | 13M | 10M |
| Q3 2025 | 221 | 68M | 83.8% | 47 / 82 | 59 / 19 | 15M | 6M |
| Q2 2025 | 193 | 60M | 73.0% | 28 / 66 | 73 / 39 | 9M | 9M |
| Q1 2025 | 205 | 59M | 72.2% | 66 / 61 | 58 / 17 | 11M | 14M |
| Q4 2024 | 158 | 62M | 75.6% | 27 / 64 | 49 / 21 | 8M | 6M |
| Q3 2024 | 152 | 59M | 72.7% | 19 / 42 | 69 / 24 | 12M | 6M |
| Q2 2024 | 158 | 60M | 73.8% | 36 / 61 | 51 / 46 | 14M | 20M |
| Q1 2024 | 169 | 67M | 81.8% | 25 / 57 | 67 / 25 | 9M | 7M |
| Q4 2023 | 169 | 65M | 79.3% | 32 / 59 | 59 / 27 | 11M | 10M |
| Q3 2023 | 165 | 64M | 78.0% | 22 / 65 | 63 / 21 | 7M | 8M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of ADTN | Value | % of fund | As of |
|---|---|---|---|---|---|
| Vanguard Total Stock Market Index Fund | 2,569,422 | 3.15% | $35.71M | 0.00% | Jun 30, 2026 |
| iShares Russell 2000 ETF | 2,008,636 | 2.47% | $27.92M | 0.03% | Jun 30, 2026 |
| Vanguard Information Technology Index Fund | 1,814,539 | 2.23% | $30.03M | 0.02% | May 31, 2026 |
| State Street(R) SPDR(R) S&P(R) Telecom ETF | 1,283,758 | 1.58% | $17.84M | 2.51% | Jun 30, 2026 |
| First Eagle Small Cap Opportunity Fund | 1,054,729 | 1.29% | $8.98M | 0.31% | Jul 31, 2026 |
| JPMorgan Small Cap Growth Fund | 949,522 | 1.17% | $13.20M | 0.51% | Jun 30, 2026 |
| Vanguard Strategic Equity Fund | 918,616 | 1.13% | $12.77M | 0.10% | Jun 30, 2026 |
| Vanguard Extended Market Index Fund | 858,335 | 1.05% | $11.93M | 0.01% | Jun 30, 2026 |
| Fidelity Enhanced Small Cap Core ETF | 848,529 | 1.04% | $11.79M | 0.20% | Jun 30, 2026 |
| Fidelity Small Cap Index Fund | 840,873 | 1.03% | $7.16M | 0.02% | Jul 31, 2026 |
| Heartland Value Fund | 750,000 | 0.92% | $10.43M | 0.89% | Jun 30, 2026 |
| iShares Russell 2000 Growth ETF | 722,263 | 0.89% | $10.04M | 0.07% | Jun 30, 2026 |
| Royce Small-Cap Opportunity Fund | 667,074 | 0.82% | $9.27M | 0.66% | Jun 30, 2026 |
| Vanguard Strategic Small-Cap Equity Fund | 637,514 | 0.78% | $8.86M | 0.28% | Jun 30, 2026 |
| Vanguard Explorer Fund | 569,720 | 0.70% | $4.85M | 0.02% | Jul 31, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Thomas R. Stanton | Chairman & CEO, Director | 1,126,554 | 1.38% | Apr 3, 2026 |
| Christoph Glingener | Chief Technology Officer | 83,953 | 0.10% | Aug 10, 2026 |
| Timothy P. Santo | SVP of Finance; CFO | 59,924 | 0.07% | Aug 7, 2026 |
| James Denson Wilson Jr | Chief Revenue Officer | 137,055 | 0.17% | May 22, 2026 |
| Ulrich Dopfer | Chief Financial Officer | 48,195 | 0.06% | Jan 28, 2025 |
| Anne DelSanto | Director | 4,399 | 0.01% | Jul 6, 2026 |
| Hourigan Rice Jacqueline | Director | 76,090 | 0.09% | Mar 5, 2026 |
| H. Fenwick Huss | Director | 107,600 | 0.13% | Jan 5, 2026 |
| Nikos Theodosopoulos | Director | 65,963 | 0.08% | Jan 5, 2026 |
| Kathryn A. Walker | Director | 98,663 | 0.12% | Jan 5, 2026 |
| Balan Nair | Director | 125,373 | 0.15% | Jan 5, 2026 |
| Gregory James McCray | Director | 72,893 | 0.09% | Jan 5, 2026 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Christoph Glingener Chief Technology Officer | Aug 10, 2026 | Award | +27,924 | – | – | 83,953 |
| Timothy P. Santo SVP of Finance; CFO | Aug 6, 2026 | Buy | +6,579 | $7.60 | $50.00K | 59,924 |
| Christoph Glingener Chief Technology Officer | Jul 24, 2026 | Award | +9,384 | – | – | 56,029 |
| Anne DelSanto Director | Jul 1, 2026 | Award | +4,399 | – | – | 4,399 |
| James Denson Wilson Jr Chief Revenue Officer | May 20, 2026 | Gift | −10,469 | – | – | 132,808 |
| James Denson Wilson Jr Chief Revenue Officer | May 20, 2026 | Sale | −9,332 | $14.72 | $137.37K | 143,277 |
| Christoph Glingener Chief Technology Officer | May 8, 2026 | Sale(10b5-1 plan) | −22,277 | $15.00 | $334.16K | 46,645 |
| Christoph Glingener Chief Technology Officer | May 8, 2026 | Option exercise | +22,277 | $12.17 | $271.11K | 68,922 |
| Christoph Glingener Chief Technology Officer | May 7, 2026 | Option exercise | +41,220 | $7.01 | $288.95K | 87,865 |
| Christoph Glingener Chief Technology Officer | May 7, 2026 | Sale(10b5-1 plan) | −41,220 | $14.73 | $607.17K | 46,645 |
| Christoph Glingener Chief Technology Officer | May 7, 2026 | Option exercise | +84,895 | $12.17 | $1.03M | 131,540 |
| Christoph Glingener Chief Technology Officer | May 7, 2026 | Sale(10b5-1 plan) | −84,895 | $15.06 | $1.28M | 46,645 |
| Thomas R. Stanton Chairman & CEO, Director | Apr 1, 2026 | Award | +170,723 | – | – | 1,126,554 |
| Timothy P. Santo SVP of Finance; CFO | Apr 1, 2026 | Award | +28,252 | – | – | 53,345 |
| James Denson Wilson Jr Chief Revenue Officer | Apr 1, 2026 | Award | +24,908 | – | – | 152,609 |
| Timothy P. Santo SVP of Finance; CFO | Mar 19, 2026 | Tax withholding | −1,501 | $11.90 | $17.86K | 25,093 |
| Hourigan Rice Jacqueline Director | Mar 4, 2026 | Sale | −14,406 | $10.29 | $148.24K | 13,809 |
| James Denson Wilson Jr Chief Revenue Officer | Jan 26, 2026 | Tax withholding | −1,309 | $9.24 | $12.10K | 127,701 |
| Thomas R. Stanton Chairman & CEO, Director | Jan 26, 2026 | Award | +27,973 | – | – | 967,878 |
| Thomas R. Stanton Chairman & CEO, Director | Jan 26, 2026 | Tax withholding | −12,407 | $9.24 | $114.64K | 955,471 |
| James Denson Wilson Jr Chief Revenue Officer | Jan 26, 2026 | Tax withholding | −1,087 | $9.24 | $10.04K | 127,923 |
| James Denson Wilson Jr Chief Revenue Officer | Jan 26, 2026 | Award | +3,777 | – | – | 129,010 |
| Thomas R. Stanton Chairman & CEO, Director | Jan 26, 2026 | Tax withholding | −14,409 | $9.73 | $140.20K | 939,905 |
| James Denson Wilson Jr Chief Revenue Officer | Jan 26, 2026 | Tax withholding | −998 | $9.73 | $9.71K | 125,233 |
| Thomas R. Stanton Chairman & CEO, Director | Jan 24, 2026 | Tax withholding | −17,535 | $9.55 | $167.46K | 954,314 |
| James Denson Wilson Jr Chief Revenue Officer | Jan 24, 2026 | Tax withholding | −1,227 | $9.55 | $11.72K | 126,231 |
| Thomas R. Stanton Chairman & CEO, Director | Jan 20, 2026 | Tax withholding | −10,247 | $9.24 | $94.68K | 971,849 |
| James Denson Wilson Jr Chief Revenue Officer | Jan 20, 2026 | Tax withholding | −765 | $9.24 | $7.07K | 127,458 |
| H. Fenwick Huss Director | Dec 31, 2025 | Award | +13,809 | – | – | 107,600 |
| Balan Nair Director | Dec 31, 2025 | Award | +13,809 | – | – | 125,373 |
| Kathryn A. Walker Director | Dec 31, 2025 | Award | +13,809 | – | – | 98,663 |
| Gregory James McCray Director | Dec 31, 2025 | Award | +13,809 | – | – | 72,893 |
| Nikos Theodosopoulos Director | Dec 31, 2025 | Award | +13,809 | – | – | 65,963 |
| Hourigan Rice Jacqueline Director | Dec 31, 2025 | Award | +13,809 | – | – | 28,215 |
| Timothy P. Santo SVP of Finance; CFO | Nov 28, 2025 | Buy | +6,150 | $8.02 | $49.32K | 26,594 |
| Nikos Theodosopoulos Director | Nov 26, 2025 | Buy | +12,859 | $7.81 | $100.43K | 52,154 |
| Thomas R. Stanton Chairman & CEO, Director | Nov 24, 2025 | Buy | +40,928 | $7.33 | $300.00K | 982,096 |
| James Denson Wilson Jr Chief Revenue Officer | Nov 17, 2025 | Tax withholding | −468 | $7.33 | $3.43K | 128,223 |
| Thomas R. Stanton Chairman & CEO, Director | Nov 17, 2025 | Tax withholding | −3,355 | $7.33 | $24.59K | 941,168 |
| Thomas R. Stanton Chairman & CEO, Director | Jul 13, 2025 | Tax withholding | −5,663 | $9.20 | $52.10K | 944,523 |
| Thomas R. Stanton Chairman & CEO, Director | Apr 13, 2025 | Tax withholding | −5,408 | $7.62 | $41.21K | 950,186 |
| Timothy P. Santo SVP of Finance; CFO | Mar 19, 2025 | Award | +20,444 | – | – | 20,444 |
| James Denson Wilson Jr Chief Revenue Officer | Jan 26, 2025 | Tax withholding | −845 | $10.31 | $8.71K | 128,691 |
| Thomas R. Stanton Chairman & CEO, Director | Jan 26, 2025 | Tax withholding | −9,536 | $10.31 | $98.32K | 955,594 |
| Ulrich Dopfer Chief Financial Officer | Jan 26, 2025 | Tax withholding | −1,167 | $10.31 | $12.03K | 48,195 |
| Thomas R. Stanton Chairman & CEO, Director | Jan 24, 2025 | Award | +39,735 | – | – | 815,953 |
| James Denson Wilson Jr Chief Revenue Officer | Jan 24, 2025 | Award | +14,163 | – | – | 129,536 |
| James Denson Wilson Jr Chief Revenue Officer | Jan 24, 2025 | Award | +16,096 | – | – | 119,581 |
| James Denson Wilson Jr Chief Revenue Officer | Jan 24, 2025 | Tax withholding | −4,208 | $10.31 | $43.38K | 115,373 |
| Thomas R. Stanton Chairman & CEO, Director | Jan 24, 2025 | Award | +39,375 | – | – | 815,593 |
| Thomas R. Stanton Chairman & CEO, Director | Jan 24, 2025 | Tax withholding | −10,307 | $10.31 | $106.27K | 805,286 |
| Thomas R. Stanton Chairman & CEO, Director | Jan 24, 2025 | Award | +159,844 | – | – | 965,130 |
| Christoph Glingener Chief Technology Officer | Jan 24, 2025 | Award | +13,907 | – | – | 32,775 |
| Christoph Glingener Chief Technology Officer | Jan 24, 2025 | Award | +13,870 | – | – | 46,645 |
| Ulrich Dopfer Chief Financial Officer | Jan 24, 2025 | Tax withholding | −4,613 | $10.31 | $47.56K | 32,978 |
| Ulrich Dopfer Chief Financial Officer | Jan 24, 2025 | Award | +16,291 | – | – | 37,591 |
| Ulrich Dopfer Chief Financial Officer | Jan 24, 2025 | Award | +16,384 | – | – | 49,362 |
| James Denson Wilson Jr Chief Revenue Officer | Jan 20, 2025 | Tax withholding | −765 | $10.19 | $7.80K | 103,485 |
| Thomas R. Stanton Chairman & CEO, Director | Jan 20, 2025 | Tax withholding | −6,395 | $10.19 | $65.17K | 776,218 |
| Thomas R. Stanton Chairman & CEO, Director | Jan 13, 2025 | Tax withholding | −6,018 | $10.01 | $60.24K | 782,613 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| D. Wilson James Jr Officer | May 20, 2026 | 9,332 | $137.41K | May 20, 2026 | Restricted stock vesting under a registered plan |
| Glingener Christoph Officer | May 7, 2026 | 148,392 | $2.33M | May 7, 2026 | Exercise of Stock Options |
| H. Rice Jacqueline Director | Mar 4, 2026 | 14,406 | $148.27K | Mar 4, 2026 | Restricted stock vesting under a registered plan |