ADTRAN Holdings, Inc. - Common Stock, par value $0.01 (ADTN) Institutional Ownership

13F Institutional Holders and Ownership History from Q1 2016 to Q4 2025

Type / Class
Equity / Common Stock, par value $0.01
Symbol
ADTN on Nasdaq
Shares outstanding
80,327,250
Price per share
$8.69
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
70,279,409
Total reported value
$610,897,669
% of total 13F portfolios
0%
Share change
+3,326,785
Value change
+$27,120,503
Number of holders
211
Price from insider filings
$8.69
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of ADTRAN Holdings, Inc. - Common Stock, par value $0.01 (ADTN) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
VANGUARD GROUP INC 10% $63,859,348 8,166,157 The Vanguard Group 30 Jun 2025
EGORA VENTURES AG 6.7% $41,305,115 5,357,343 EGORA Ventures AG (f/k/a EGORA Holding GmbH) 14 Feb 2025
DnB Asset Management AS 4.4% $27,382,882 3,551,606 DnB Asset Management AS 31 Mar 2025
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 4.2% $25,861,915 3,354,334 WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 31 Mar 2025
Divisar Capital Management LLC 4% -26% $30,138,784 -$9,532,631 3,213,090 -24% Divisar Capital Management LLC 30 Sep 2025

As of 31 Dec 2025, 211 institutional investors reported holding 70,279,409 shares of ADTRAN Holdings, Inc. - Common Stock, par value $0.01 (ADTN). This represents 87% of the company’s total 80,327,250 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of ADTRAN Holdings, Inc. - Common Stock, par value $0.01 (ADTN) together control 63% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
VANGUARD GROUP INC 10% 8,188,496 -2.3% 0% $71,158,031
BlackRock, Inc. 10% 8,125,259 -1.8% 0% $70,608,500
DNB Asset Management AS 3.9% 3,123,679 +7.6% 0.09% $27,144,771
Divisar Capital Management LLC 3.7% 2,986,302 -7.1% 7.3% $25,950,964
MILLENNIUM MANAGEMENT LLC 3.4% 2,694,800 +371% 0.02% $23,417,812
ROYCE & ASSOCIATES LP 3.2% 2,597,013 +7.7% 0.23% $22,568,043
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 3.1% 2,478,621 -9.4% 0.06% $21,539,216
STATE STREET CORP 2.5% 1,985,890 +4.5% 0% $17,257,384
GEODE CAPITAL MANAGEMENT, LLC 2.2% 1,766,102 -0.23% 0% $15,350,058
NEEDHAM INVESTMENT MANAGEMENT LLC 1.8% 1,447,500 +23% 0.79% $12,578,775
MORGAN STANLEY 1.7% 1,343,546 +69% 0% $11,675,424
First Eagle Investment Management, LLC 1.5% 1,235,207 +2.2% 0.02% $10,733,949
D. E. Shaw & Co., Inc. 1.5% 1,198,773 +269% 0.01% $10,417,337
PARADIGM CAPITAL MANAGEMENT INC/NY 1.4% 1,129,909 +528% 0.41% $9,818,909
Assenagon Asset Management S.A. 1.4% 1,129,047 +21% 0.01% $9,811,418
BARCLAYS PLC 1.4% 1,125,703 +40% 0% $9,782,359
Ophir Asset Management Pty Ltd 1.3% 1,069,420 -11% 1% $9,293,260
Tieton Capital Management, LLC 1.2% 988,379 -0.08% 2.9% $8,589,000
TUDOR INVESTMENT CORP ET AL 1.2% 947,508 +5.6% 0.05% $8,233,845
DIMENSIONAL FUND ADVISORS LP 1.1% 888,180 +106% 0% $7,719,379
FEDERATED HERMES, INC. 1.1% 866,431 +12% 0.01% $7,529,285
SG Americas Securities, LLC 1.1% 857,044 +324% 0.01% $7,448,000
Squarepoint Ops LLC 0.99% 797,440 +17% 0.01% $6,929,754
Kovack Advisors, Inc. 0.94% 753,550 +6.4% 0.31% $6,548,349
WESTERLY CAPITAL MANAGEMENT, LLC 0.87% 700,000 -24% 1.8% $6,083,000

Institutional Holders of ADTRAN Holdings, Inc. - Common Stock, par value $0.01 (ADTN) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 70,279,409 $610,897,669 +$27,120,503 $8.69 211
2025 Q3 67,395,311 $632,170,670 +$73,019,753 $9.38 219
2025 Q2 59,497,253 $533,686,663 +$9,414,153 $8.97 192
2025 Q1 58,522,511 $510,321,126 -$28,852,601 $8.72 204
2024 Q4 61,596,351 $513,093,123 +$19,032,311 $8.33 157
2024 Q3 58,965,958 $349,632,043 -$5,837,235 $5.93 149
2024 Q2 59,970,719 $315,391,967 -$19,892,933 $5.26 156
2024 Q1 63,682,349 $346,190,573 -$270,296 $5.44 166
2023 Q4 62,894,503 $461,974,644 -$8,184,997 $7.34 168
2023 Q3 63,552,312 $523,087,079 -$14,687,244 $8.23 164
2023 Q2 64,342,704 $677,558,122 -$26,182,923 $10.53 159
2023 Q1 63,196,076 $1,002,082,503 -$1,663,078 $15.86 172
2022 Q4 63,601,968 $1,194,292,898 +$47,348,414 $18.79 177
2022 Q3 61,173,817 $1,197,841,121 +$1,169,038,375 $19.58 180
2022 Q2 1,377,834 $24,255,835 +$24,246,702 $17.53 10
2022 Q1 521 $9,612 +$240 $18.45 1
2021 Q4 508 $11,598 +$251 $22.83 1
2021 Q3 497 $9,324 $18.76 1
2021 Q2 497 $10,263 $20.65 1
2021 Q1 497 $8,290 $16.68 1
2020 Q4 497 $7,341 $14.77 1
2020 Q3 497 $5,097 $10.26 1
2020 Q2 497 $5,432 +$5,432 $10.93 1
2019 Q4 0 $0 -$12,752 $8.69 0
2019 Q3 1,124 $12,752 $11.35 1
2019 Q2 1,124 $17,141 $15.25 1
2019 Q1 1,124 $15,399 +$15,399 $13.70 1
2018 Q4 0 $0 -$14,844 $8.69 0
2018 Q3 841 $14,844 +$6,937 $17.65 1
2018 Q2 448 $6,653 -$10,098 $14.85 1
2018 Q1 1,128 $17,540 $15.55 1
2017 Q4 1,128 $21,827 $19.35 1
2017 Q3 1,128 $27,072 $24.00 1
2017 Q2 1,128 $23,293 $20.65 1
2017 Q1 1,128 $23,406 $20.75 1
2016 Q4 1,128 $25,211 $22.35 1
2016 Q3 1,128 $21,590 $19.14 1
2016 Q2 1,128 $21,037 $18.65 1
2016 Q1 1,128 $22,808 $20.22 1