Mariner
ADTN icon

Mariner’s Adtran ADTN Stock Holding History

Mariner’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 		$339K Sell
24,359
-8,151
-25% -$127K ﹤0.01% 2748
2026
Q1 		$409K Buy
+32,510
New +$329K ﹤0.01% 2637
2025
Q2 		– Sell
-10,887
Closed -$94.9K – 3476
2025
Q1 		$94.9K Buy
+10,887
New +$110K ﹤0.01% 3196
2024
Q1 		– Sell
-10,810
Closed -$79.3K – 3130
2023
Q4 		$79.3K Buy
+10,810
New +$71.2K ﹤0.01% 2889

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

Mariner's ADTN Position: Q2 2026 in Review

Mariner reduced its Adtran (ADTN) stake by 25% in Q2 2026, selling an estimated $127K and leaving 24,359 shares worth $339K. The position accounts for ﹤0.01% of the portfolio, ranked #2748.

Mariner first reported a position in ADTN in Q4 2023 and has held it in 4 quarters since. The position peaked at $409K in Q1 2026. 249 funds tracked by Wall St. Rank hold ADTN as of Q2 2026.

  • Mariner held 24,359 shares of Adtran worth $339K as of Q2 2026.
  • Mariner sold 8,151 Adtran shares in Q2 2026, an estimated $127K.
  • Adtran made up ﹤0.01% of Mariner's portfolio in Q2 2026, its #2748 holding.
  • Mariner first reported a position in Adtran in Q4 2023 and has held it in 4 quarters since.
  • Mariner's Adtran position peaked at $409K in Q1 2026.
  • 249 funds tracked by Wall St. Rank held Adtran as of Q2 2026.

Based on Mariner's 13F filing for Q2 2026, filed 13 Aug 2026.