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Nierenberg Investment Management Company’s Adtran ADTN Stock Holding History

Nierenberg Investment Management Company’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 		– Sell
-93,110
Closed -$1.17M – 36
2026
Q1 		$1.17M Hold
93,110
– – 0.58% 21
2025
Q4 		$809K Sell
93,110
-250,000
-73% -$2.17M 0.39% 24
2025
Q3 		$3.22M Hold
343,110
– – 1.38% 14
2025
Q2 		$3.08M Sell
343,110
-92,000
-21% -$734K 1.64% 9
2025
Q1 		$3.79M Buy
435,110
+92,000
+27% +$926K 2.07% 7
2024
Q4 		$2.86M Hold
343,110
– – 1.59% 10
2024
Q3 		$2.03M Buy
+343,110
New +$1.91M 1.15% 13

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

Nierenberg Investment Management Company's ADTN Position: Q2 2026 in Review

Nierenberg Investment Management Company sold out of Adtran (ADTN) in Q2 2026, closing a stake of 93,110 shares — an estimated $1.17M sold.

Nierenberg Investment Management Company first reported a position in ADTN in Q3 2024 and held it in 7 quarters. The position peaked at $3.79M in Q1 2025. 249 funds tracked by Wall St. Rank hold ADTN as of Q2 2026.

  • Nierenberg Investment Management Company reported no remaining Adtran position as of Q2 2026 after selling out during the quarter.
  • Nierenberg Investment Management Company sold 93,110 Adtran shares in Q2 2026, an estimated $1.17M.
  • Nierenberg Investment Management Company first reported a position in Adtran in Q3 2024 and held it in 7 quarters.
  • Nierenberg Investment Management Company's Adtran position peaked at $3.79M in Q1 2025.
  • 249 funds tracked by Wall St. Rank held Adtran as of Q2 2026.

Based on Nierenberg Investment Management Company's 13F filing for Q2 2026, filed 11 Aug 2026.