Richard Pzena - Pzena Investment Management
Period:    Q1 2026
Portfolio date:    31 Mar 2026
No. of stocks:    158
Portfolio value:    $30,796,447,662
Holdings Activity Buys Sells    History
Holding/activity history for  Standard Biotools Inc (LAB)
Period Shares % of Portfolio Activity % Change to Portfolio Reported Price Value Filing
2023   Q3 0 0.00 Sell 100.00% <0.01 SEC
2023   Q2 1,160 <0.01 $241.33 $279,943 SEC
2023   Q1 1,160 <0.01 Reduce 34.79% <0.01 $229.42 $266,127 SEC
2022   Q4 1,779 <0.01 Buy <0.01 $235.48 $418,919 SEC
2017   Q2 0 0.00 Sell 100.00% <0.01 SEC
2017   Q1 2,230 <0.01 Reduce 4.17% <0.01 $143.50 $320,000 SEC
2016   Q4 2,327 <0.01 Add 6.50% <0.01 $128.49 $299,000 SEC
2016   Q3 2,185 <0.01 Buy <0.01 $137.30 $300,000 SEC
2016   Q1 0 0.00 Sell 100.00% 0.01 SEC
2015   Q4 17,560 0.01 Reduce 93.59% 0.18 $123.63 $2,171,000 SEC
2015   Q3 273,766 0.19 Reduce 61.94% 0.31 $108.47 $29,695,000 SEC
2015   Q2 719,376 0.50 Reduce 1.20% <0.01 $121.22 $87,203,000 SEC
2015   Q1 728,078 0.52 Reduce 12.35% 0.06 $126.09 $91,803,000 SEC
2014   Q4 830,648 0.49 Reduce 46.70% 0.41 $107.90 $89,627,000 SEC
2014   Q3 1,558,296 0.88 Reduce 5.82% 0.06 $101.75 $158,557,000 SEC
2014   Q2 1,654,529 0.96 Reduce 26.69% 0.35 $102.40 $169,424,000 SEC
2014   Q1 2,256,910 1.32 Reduce 6.16% 0.08 $98.21 $221,651,000 SEC
2013   Q4 2,405,081 1.33 Add 4.13% 0.05 $91.37 $219,752,000 SEC
2013   Q3 2,309,603 1.53 Add 1.81% 0.03 $99.14 $228,974,000 SEC
2013   Q2 2,268,529 1.57 Reduce 1.66% 0.02 $100.10 $227,080,000 SEC
2013   Q1 2,306,707 1.49 Add 185.13% 0.97 $90.20 $208,065,000 SEC
2012   Q4 808,992 0.59 Add 1,010.32% 0.54 $86.62 $70,075,000 SEC
2012   Q3 72,861 0.06 Reduce 4.11% <0.01 $92.46 $6,737,000 SEC
2012   Q2 75,986 0.08 Buy 0.08 $92.61 $7,037,000 SEC
2011   Q3 0 0.00 Sell 100.00% 0.12 SEC
2011   Q2 130,746 0.12 Reduce 92.99% 1.42 $96.79 $12,655,000 SEC
2011   Q1 1,865,246 1.53 Reduce 7.84% 0.14 $92.13 $171,845,000 SEC
2010   Q4 2,023,913 1.75 Add 14.66% 0.22 $87.92 $177,942,000 SEC
2010   Q3 1,765,089 1.48 Add 22.57% 0.27 $78.43 $138,436,000 SEC
2010   Q2 1,440,047 1.20 Buy 1.20 $75.35 $108,508,000 SEC