Martin Whitman - Third Avenue Management
Period:    Q1 2026
Portfolio date:    31 Mar 2026
No. of stocks:    53
Portfolio value:    $616,036,133
Holdings Activity Buys Sells    History
Holding/activity history for  Westlake Corp. (WLK)
← All WLK superinvestors
Period Shares % of Portfolio Activity % Change to Portfolio Price Value Filing
2015   Q2 0 0.00 Sell 100.00% 0.01 $67.92–79.25 · VW $73.05i SEC
2015   Q1 4,900 0.01 Add 8.89% <0.01 $54.15–72.72 · VW $64.66i $353,000 SEC
2014   Q4 4,500 0.01 Buy 0.01 $53.43–86.23 · VW $67.73i $275,000 SEC
2013   Q1 0 0.00 Sell 100.00% 0.16 $40.71–49.13 · VW $44.82i SEC
2012   Q4 151,008 0.16 Reduce 74.19% $34.51–40.24 · VW $37.68i $5,987,000 SEC
2012   Q2 585,114 0.00 Reduce 7.75% 0.05 $24.07–32.96 · VW $28.23i $15,289,000 SEC
2012   Q1 634,290 0.59 Reduce 51.30% 0.41 $20.19–33.46 · VW $28.87i $20,548,000 SEC
2011   Q4 1,302,348 0.80 Add 14.60% 0.10 $15.63–22.11 · VW $19.85i $26,203,000 SEC
2011   Q3 1,136,468 0.60 Add 2.02% 0.01 $17.09–27.72 · VW $22.73i $19,479,000 SEC
2011   Q2 1,114,018 0.70 Reduce 44.97% 0.56 $23.93–33.88 · VW $28.45i $28,909,000 SEC
2011   Q1 2,024,516 1.25 Reduce 26.72% 0.35 $19.09–28.24 · VW $23.55i $56,889,000 SEC
2010   Q4 2,762,650 1.32 Reduce 10.71% 0.12 $14.62–21.97 · VW $17.96i $60,046,000 SEC
2010   Q3 3,094,048 1.08 Reduce 5.58% 0.04 $8.67–15.37 · VW $12.95i $46,302,000 SEC
2010   Q2 3,276,786 0.79 Reduce 9.10% 0.09 $9.18–15.05 · VW $11.74i $30,425,000 SEC
2010   Q1 3,604,886 0.98 Add 2.31% 0.02 $9.60–13.05 · VW $11.25i $46,485,000 SEC
2009   Q4 3,523,474 0.95 Reduce 7.19% 0.07 $11.97–13.97 · VW $12.77i $43,920,000 SEC
2009   Q3 3,796,266 1.04 Reduce 33.99% 0.52 $9.40–14.11 · VW $12.13i $48,782,000 SEC
2009   Q2 5,751,438 1.52 Reduce 26.51% 0.46 $7.10–11.28 · VW $9.73i $58,636,000 SEC
2009   Q1 7,826,176 1.73 Buy 1.73 $5.15–8.50 · VW $6.96i $57,248,000 SEC
2008   Q4 0 0.00 Sell 100.00% 1.58 $5.80–11.10 · VW $8.37i SEC
2008   Q2 191,420 1.58 Add 19.14% 0.25 $6.47–9.64 · VW $8.08i $6,440,788 SEC
2008   Q1 160,670 1.51 Reduce 8.81% 0.10 $6.26–11.10 · VW $8.42i $6,155,960 SEC
2007   Q4 176,202 1.14 Add 18.88% 0.18 $9.17–13.33 · VW $10.99i $4,639,335 SEC
2007   Q3 148,222 0.83 Add 45.63% 0.26 $12.19–16.43 · VW $13.69i $2,925,816,000 SEC
2007   Q2 101,780 0.48 Add 106.74% 0.25 $13.31–16.54 · VW $14.55i $1,809,753 SEC
2007   Q1 49,232 0.27 Buy 0.27 $13.23–18.57 · VW $15.31i $906,681,000 SEC
Price snapshot:
Current price$76.07
52-week low$55.23
52-week high$123.49