HA
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Heartland Advisors’s Adtran ADTN Stock Holding History

Heartland Advisors’s Portfolio ADTN Stock Details ADTN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$10.4M Hold
750,000
– – 0.46% 79
2026
Q1 		$9.44M Buy
+750,000
New +$7.6M 0.48% 78
2019
Q4 		– Sell
-489,012
Closed -$5.55M – 197
2019
Q3 		$5.55M Sell
489,012
-239,468
-33% -$2.85M 0.42% 105
2019
Q2 		$11.1M Sell
728,480
-89,919
-11% -$1.43M 0.82% 42
2019
Q1 		$11.2M Buy
818,399
+4,965
+0.6% +$68.6K 0.83% 40
2018
Q4 		$8.74M Buy
813,434
+562,588
+224% +$7.67M 0.72% 60
2018
Q3 		$4.43M Buy
250,846
+117,984
+89% +$1.97M 0.3% 136
2018
Q2 		$1.97M Sell
132,862
-3,550
-3% -$52.9K 0.13% 165
2018
Q1 		$2.12M Sell
136,412
-26,473
-16% -$442K 0.14% 174
2017
Q4 		$3.15M Buy
162,885
+766
+0.5% +$17K 0.2% 154
2017
Q3 		$3.89M Sell
162,119
-47,920
-23% -$1.06M 0.25% 149
2017
Q2 		$4.34M Sell
210,039
-54,979
-21% -$1.1M 0.28% 135
2017
Q1 		$5.5M Sell
265,018
-65,731
-20% -$1.43M 0.34% 129
2016
Q4 		$7.39M Sell
330,749
-1,618
-0.5% -$32.7K 0.41% 111
2016
Q3 		$6.36M Sell
332,367
-106,633
-24% -$1.97M 0.37% 113
2016
Q2 		$8.18M Buy
439,000
+62,126
+16% +$1.18M 0.46% 89
2016
Q1 		$7.62M Buy
376,874
+107,440
+40% +$1.99M 0.4% 99
2015
Q4 		$4.64M Buy
269,434
+105,383
+64% +$1.68M 0.19% 144
2015
Q3 		$2.4M Sell
164,051
-119,228
-42% -$1.88M 0.09% 191
2015
Q2 		$4.6M Sell
283,279
-242,956
-46% -$4.17M 0.13% 175
2015
Q1 		$9.82M Sell
526,235
-125,800
-19% -$2.68M 0.25% 119
2014
Q4 		$14.2M Sell
652,035
-40,712
-6% -$835K 0.28% 117
2014
Q3 		$14.2M Buy
692,747
+459,225
+197% +$10.3M 0.28% 122
2014
Q2 		$5.27M Buy
+233,522
New +$5.29M 0.09% 184

Other funds holding ADTN

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
RA
Royce & Associates New York $12.4B AUM 64.17% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return
DnB Asset Management
DnB Asset Management Oslo, Norway $35.7B AUM 27.58% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Heartland Advisors's ADTN Position: Q2 2026 in Review

Heartland Advisors held its Adtran (ADTN) position steady in Q2 2026 at 750,000 shares worth $10.4M. The position accounts for 0.46% of the portfolio, ranked #79.

Heartland Advisors first reported a position in ADTN in Q2 2014 and has held it in 24 quarters since. The position peaked at $14.2M in Q3 2014. 250 funds tracked by Wall St. Rank hold ADTN as of Q2 2026.

  • Heartland Advisors held 750,000 shares of Adtran worth $10.4M as of Q2 2026.
  • Heartland Advisors left its Adtran share count unchanged in Q2 2026.
  • Adtran made up 0.46% of Heartland Advisors's portfolio in Q2 2026, its #79 holding.
  • Heartland Advisors first reported a position in Adtran in Q2 2014 and has held it in 24 quarters since.
  • Heartland Advisors's Adtran position peaked at $14.2M in Q3 2014.
  • 250 funds tracked by Wall St. Rank held Adtran as of Q2 2026.

Based on Heartland Advisors's 13F filing for Q2 2026, filed 11 Aug 2026.