Portolan Capital Management’s Century Aluminum CENX Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2026
Q2
Sell
-95,039
Closed -$5.58M 154
2026
Q1
$5.58M Buy
+95,039
New +$4.76M 0.3% 94
2017
Q3
Sell
-484,368
Closed -$7.55M 119
2017
Q2
$7.55M Buy
484,368
+189,597
+64% +$2.64M 0.97% 35
2017
Q1
$3.74M Buy
+294,771
New +$3.91M 0.49% 78

Other funds holding CENX

Portolan Capital Management's CENX Position: Q2 2026 in Review

Portolan Capital Management sold out of Century Aluminum (CENX) in Q2 2026, closing a stake of 95,039 shares — an estimated $5.58M sold.

Portolan Capital Management first reported a position in CENX in Q1 2017 and held it in 3 quarters. The position peaked at $7.55M in Q2 2017. 413 funds tracked by Wall St. Rank hold CENX as of Q2 2026.

  • Portolan Capital Management reported no remaining Century Aluminum position as of Q2 2026 after selling out during the quarter.
  • Portolan Capital Management sold 95,039 Century Aluminum shares in Q2 2026, an estimated $5.58M.
  • Portolan Capital Management first reported a position in Century Aluminum in Q1 2017 and held it in 3 quarters.
  • Portolan Capital Management's Century Aluminum position peaked at $7.55M in Q2 2017.
  • 413 funds tracked by Wall St. Rank held Century Aluminum as of Q2 2026.

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