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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
2025
Q1 		– Sell
-200,000
Closed -$1.67M – 58
2024
Q4 		$1.67M Hold
200,000
– – 0.92% 17
2024
Q3 		$1.19M Buy
+200,000
New +$1.11M 0.67% 22

Other funds holding ADTN

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 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
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
First Eagle Investment Management
First Eagle Investment Management New York $59.9B AUM 27.01% 1-Year Est. Return
William Blair Investment Management
William Blair Investment Management Chicago, Illinois $33.3B AUM 44.76% 1-Year Est. Return
Assenagon Asset Management
Assenagon Asset Management Senningerberg, Luxembourg $80.2B AUM 50.57% 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. 129 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.
  • 129 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.