GIM
ADTN icon

Granahan Investment Management’s Adtran ADTN Stock Holding History

Granahan Investment Management’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 		$622K Buy
44,758
+13,976
+45% +$218K 0.02% 145
2026
Q1 		$387K Sell
30,782
-24,058
-44% -$244K 0.02% 147
2025
Q4 		$477K Sell
54,840
-527,650
-91% -$4.58M 0.02% 151
2025
Q3 		$5.46M Buy
582,490
+382,170
+191% +$3.56M 0.22% 91
2025
Q2 		$1.8M Buy
200,320
+164,227
+455% +$1.31M 0.07% 141
2025
Q1 		$315K Buy
+36,093
New +$363K 0.02% 154

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

Granahan Investment Management's ADTN Position: Q2 2026 in Review

Granahan Investment Management increased its Adtran (ADTN) stake by 45% in Q2 2026, buying an estimated $218K and bringing the position to 44,758 shares worth $622K. The position accounts for 0.02% of the portfolio, ranked #145.

Granahan Investment Management first reported a position in ADTN in Q1 2025 and has held it in 6 quarters since. The position peaked at $5.46M in Q3 2025. 249 funds tracked by Wall St. Rank hold ADTN as of Q2 2026.

  • Granahan Investment Management held 44,758 shares of Adtran worth $622K as of Q2 2026.
  • Granahan Investment Management bought 13,976 Adtran shares in Q2 2026, an estimated $218K.
  • Adtran made up 0.02% of Granahan Investment Management's portfolio in Q2 2026, its #145 holding.
  • Granahan Investment Management first reported a position in Adtran in Q1 2025 and has held it in 6 quarters since.
  • Granahan Investment Management's Adtran position peaked at $5.46M in Q3 2025.
  • 249 funds tracked by Wall St. Rank held Adtran as of Q2 2026.

Based on Granahan Investment Management's 13F filing for Q2 2026, filed 14 Aug 2026.