ADTRAN HOLDINGS INC (ADTN) Institutional Shareholders
ADTRAN HOLDINGS INC (ADTN) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $1.15B in ADTN holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of ADTN tracked by InsiderSet, reporting ownership valued at approximately $108.92M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $55.56M, representing an estimated loss of -48.99% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 44% of the total disclosed ADTN value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Portfolio Management Llc, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in ADTRAN HOLDINGS INC (ADTN).
This page ranks the largest institutional ADTN shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
240
Total Reported Value
$1.15B
Largest Holder
Blackrock, Inc.
Largest Position
$108.92M
Insider Transactions (90d)
4
Latest Filing Quarter
Q2 2026
New Institutional Positions
74
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 7,836,196 | $108,923,125 | $55,558,630 | -$53,364,495 | -48.99% | |
| Vanguard Portfolio Management Llc | 0.00% | 5,135,649 | $71,385,521 | $36,411,751 | -$34,973,770 | -48.99% | |
| Vanguard Capital Management Llc | 0.00% | 3,510,271 | $48,792,767 | $24,887,821 | -$23,904,946 | -48.99% | |
| State Street Corp | 0.00% | 3,082,794 | $42,850,837 | $21,857,009 | -$20,993,828 | -48.99% | |
| Royce & Associates Lp | 0.33% | 2,972,917 | $41,323,546 | $21,077,982 | -$20,245,564 | -48.99% | |
| Ubs Group Ag | 0.01% | 2,940,724 | $40,876,064 | $20,849,733 | -$20,026,331 | -48.99% | |
| Two Sigma Investments, Lp | 0.03% | 2,896,353 | $40,259,307 | $20,535,143 | -$19,724,164 | -48.99% | |
| Millennium Management Llc | 0.03% | 2,722,820 | $37,847,198 | $19,304,794 | -$18,542,404 | -48.99% | |
| Dnb Asset Management As | 0.10% | 2,619,389 | $36,409,507 | $18,571,468 | -$17,838,039 | -48.99% | |
| Jpmorgan Chase & Co | 0.00% | 2,623,057 | $36,067,035 | $18,597,474 | -$17,469,561 | -48.44% | |
| Geode Capital Management, Llc | 0.00% | 1,958,052 | $27,222,874 | $13,882,589 | -$13,340,285 | -49.00% | |
| Morgan Stanley | 0.00% | 1,792,752 | $24,919,258 | $12,710,612 | -$12,208,646 | -48.99% | |
| Renaissance Technologies LLC | Jim Simons | 0.03% | 1,773,740 | $24,654,986 | $12,575,817 | -$12,079,169 | -48.99% |
| Boston Partners | 0.02% | 1,651,038 | $22,721,824 | $11,705,859 | -$11,015,965 | -48.48% | |
| Qube Research & Technologies Ltd | 0.02% | 1,398,913 | $19,444,891 | $9,918,293 | -$9,526,598 | -48.99% | |
| Dimensional Fund Advisors Lp | 0.00% | 1,366,243 | $18,989,752 | $9,686,663 | -$9,303,089 | -48.99% | |
| First Eagle U.S. Value | Jean-Marie Eveillard | 0.03% | 1,248,507 | $17,354,247 | $8,851,915 | -$8,502,332 | -48.99% |
| William Blair Investment Management, Llc | 0.05% | 1,099,019 | $15,276,364 | $7,792,045 | -$7,484,319 | -48.99% | |
| D. E. Shaw & Co., Inc. | 0.01% | 1,091,898 | $15,177,383 | $7,741,557 | -$7,435,826 | -48.99% | |
| Goldman Sachs Group Inc | 0.00% | 1,045,037 | $14,526,015 | $7,409,312 | -$7,116,703 | -48.99% | |
| Marshall Wace, Llp | 0.01% | 1,038,292 | $14,432,262 | $7,361,490 | -$7,070,772 | -48.99% | |
| Fmr Llc | 0.00% | 1,011,195 | $14,055,605 | $7,169,373 | -$6,886,232 | -48.99% | |
| Assenagon Asset Management S.A. | 0.02% | 917,754 | $12,756,781 | $6,506,876 | -$6,249,905 | -48.99% | |
| Divisar Capital Management Llc | 2.73% | 851,526 | $11,836,211 | $6,037,319 | -$5,798,892 | -48.99% | |
| Federated Hermes, Inc. | 0.02% | 849,967 | $11,814,541 | $6,026,266 | -$5,788,275 | -48.99% | |
| Bank Of America Corp | 0.00% | 845,421 | $11,751,353 | $5,994,035 | -$5,757,318 | -48.99% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 786,873 | $10,937,535 | $5,578,930 | -$5,358,605 | -48.99% | |
| Point72 Asset Management, L.P. | 0.02% | 764,780 | $10,630,442 | $5,422,290 | -$5,208,152 | -48.99% | |
| Heartland Advisors Inc | 0.46% | 750,000 | $10,425,000 | $5,317,500 | -$5,107,500 | -48.99% | |
| Northern Trust Corp | 0.00% | 734,960 | $10,215,945 | $5,210,866 | -$5,005,079 | -48.99% | |
| Charles Schwab Investment Management Inc | 0.00% | 714,068 | $9,925,545 | $5,062,742 | -$4,862,803 | -48.99% | |
| Nuveen, Llc | 0.00% | 700,147 | $9,732,043 | $4,964,042 | -$4,768,001 | -48.99% | |
| Kovack Advisors, Inc. | 0.46% | 696,210 | $9,496,305 | $4,936,129 | -$4,560,176 | -48.02% | |
| Aqr Capital Management Llc | 0.00% | 671,403 | $9,332,501 | $4,760,247 | -$4,572,254 | -48.99% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.02% | 629,119 | $8,744,754 | $4,460,454 | -$4,284,300 | -48.99% | |
| Wells Fargo & Company/Mn | 0.00% | 625,245 | $8,690,912 | $4,432,987 | -$4,257,925 | -48.99% | |
| Squarepoint Ops Llc | 0.02% | 617,388 | $8,581,693 | $4,377,281 | -$4,204,412 | -48.99% | |
| Norges Bank | 0.00% | 575,400 | $7,998,060 | $4,079,586 | -$3,918,474 | -48.99% | |
| 1492 Capital Management Llc | 2.35% | 573,128 | $7,966,479 | $4,063,478 | -$3,903,001 | -48.99% | |
| Hrt Financial Lp | 0.01% | 561,192 | $7,800,000 | $3,978,851 | -$3,821,149 | -48.99% | |
| Tudor Investment Corp Et Al | 0.03% | 541,455 | $7,526,224 | $3,838,916 | -$3,687,308 | -48.99% | |
| Vanguard Fiduciary Trust Co | 0.00% | 540,877 | $7,518,190 | $3,834,818 | -$3,683,372 | -48.99% | |
| Hennessy Advisors Inc | 0.23% | 526,300 | $7,315,570 | $3,731,467 | -$3,584,103 | -48.99% | |
| Royal Bank Of Canada | 0.00% | 504,227 | $7,009,000 | $3,574,969 | -$3,434,031 | -48.99% | |
| Nomura Holdings Inc | 0.03% | 502,322 | $6,982,276 | $3,561,463 | -$3,420,813 | -48.99% | |
| Westerly Capital Management, Llc | 1.28% | 500,000 | $6,950,000 | $3,545,000 | -$3,405,000 | -48.99% | |
| Barclays Plc | 0.00% | 479,197 | $6,660,840 | $3,397,507 | -$3,263,333 | -48.99% | |
| Trexquant Investment Lp | 0.04% | 472,733 | $6,570,989 | $3,351,677 | -$3,219,312 | -48.99% | |
| Needham Investment Management Llc | 0.19% | 450,000 | $6,255,000 | $3,190,500 | -$3,064,500 | -48.99% | |
| Sei Investments Co | 0.00% | 403,253 | $5,605,207 | $2,859,064 | -$2,746,143 | -48.99% |
Frequently asked questions about ADTN
Who owns the most ADTN stock?
The largest holders of ADTN are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ADTRAN HOLDINGS INC (ADTN).
Is ADTN widely held by superinvestors?
Many widely followed stocks like ADTN appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly ADTN is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.