HA
ADTN icon

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
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 $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
RA
Royce & Associates New York $10.1B AUM 42.88% 1-Year Est. Return
DnB Asset Management
DnB Asset Management Oslo, Norway $28B AUM 26% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
William Blair Investment Management
William Blair Investment Management Chicago, Illinois $30.3B AUM 33.75% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Heartland Advisors's ADTN Position: Q1 2026 in Review

Heartland Advisors opened a new position in Adtran (ADTN) in Q1 2026: 750,000 shares worth $9.44M. The stake represents 0.48% of the portfolio and ranks #78 among its holdings. This is a return to the name: Heartland Advisors previously reported a position in ADTN as recently as Q3 2019.

Heartland Advisors first reported a position in ADTN in Q2 2014 and has held it in 23 quarters since. The position peaked at $14.2M in Q3 2014. 227 funds tracked by Wall St. Rank hold ADTN as of Q1 2026.

  • Heartland Advisors held 750,000 shares of Adtran worth $9.44M as of Q1 2026.
  • Adtran was a new Heartland Advisors position in Q1 2026.
  • Adtran made up 0.48% of Heartland Advisors's portfolio in Q1 2026, its #78 holding.
  • Heartland Advisors first reported a position in Adtran in Q2 2014 and has held it in 23 quarters since.
  • Heartland Advisors's Adtran position peaked at $14.2M in Q3 2014.
  • 227 funds tracked by Wall St. Rank held Adtran as of Q1 2026.

Based on Heartland Advisors's 13F filing for Q1 2026, filed 6 May 2026.