Wallace Weitz - Weitz Investment Management, Inc.
Period:    Q1 2026
Portfolio date:    31 Mar 2026
No. of stocks:    49
Portfolio value:    $1,432,543,452
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
2024   Q2 0 0.00 Sell 100.00% 2.84 SEC
2024   Q1 256,350 2.84 Reduce 1.91% 0.06 $218.46 $56,002,221 SEC
2023   Q4 261,350 3.15 Reduce 7.76% 0.24 $227.29 $59,402,242 SEC
2023   Q3 283,350 3.15 Add 5.63% 0.17 $201.05 $56,967,518 SEC
2023   Q2 268,250 3.47 Reduce 0.24% <0.01 $241.33 $64,736,773 SEC
2023   Q1 268,900 3.58 Add 1.99% 0.07 $229.42 $61,691,038 SEC
2022   Q4 263,650 3.55 Reduce 0.90% 0.03 $235.48 $62,084,302 SEC
2022   Q3 266,050 3.25 Reduce 2.71% 0.09 $204.81 $54,490,000 SEC
2022   Q2 273,469 3.39 $234.36 $64,090,000 SEC
2022   Q1 273,469 3.23 Reduce 5.49% 0.20 $263.66 $72,103,000 SEC
2021   Q4 289,369 3.68 Reduce 19.84% 0.85 $314.21 $90,923,000 SEC
2021   Q3 361,000 4.30 Reduce 2.49% 0.11 $281.44 $101,600,000 SEC
2021   Q2 370,200 4.35 Reduce 6.33% 0.28 $275.85 $102,120,000 SEC
2021   Q1 395,200 4.50 Reduce 13.41% 0.54 $255.03 $100,788,000 SEC
2020   Q4 456,400 4.00 Reduce 2.14% 0.09 $203.55 $92,900,000 SEC
2020   Q3 466,400 4.15 Add 3.44% 0.14 $188.27 $87,809,000 SEC
2020   Q2 450,900 3.75 Reduce 14.42% 0.51 $166.11 $74,899,000 SEC
2020   Q1 526,850 3.56 Reduce 2.87% 0.11 $126.39 $66,589,000 SEC
2019   Q4 542,425 3.69 Reduce 3.71% 0.15 $169.17 $91,762,000 SEC
2019   Q3 563,325 3.96 Reduce 8.03% 0.35 $168.00 $94,639,000 SEC
2019   Q2 612,525 4.33 Reduce 9.16% 0.40 $172.90 $105,906,000 SEC
2019   Q1 674,275 4.42 Reduce 2.18% 0.09 $152.98 $103,151,000 SEC
2018   Q4 689,325 4.13 Add 12.27% 0.45 $126.36 $87,103,000 SEC
2018   Q3 613,997 4.52 Reduce 0.20% <0.01 $173.68 $106,639,000 SEC
2018   Q2 615,247 4.88 Reduce 17.71% 0.97 $179.53 $110,455,000 SEC
2018   Q1 747,684 5.48 Reduce 1.45% 0.08 $161.75 $120,938,000 SEC
2017   Q4 758,675 5.45 Reduce 0.35% 0.02 $159.51 $121,016,000 SEC
2017   Q3 761,375 5.16 Reduce 0.36% 0.02 $150.97 $114,945,000 SEC
2017   Q2 764,090 5.57 Add 3.25% 0.18 $154.14 $117,777,000 SEC
2017   Q1 740,019 4.75 Reduce 4.97% 0.21 $143.47 $106,171,000 SEC
2016   Q4 778,751 4.32 Add 1.64% 0.07 $128.38 $99,976,000 SEC
2016   Q3 766,205 4.29 Reduce 4.87% 0.21 $137.48 $105,338,000 SEC
2016   Q2 805,459 4.21 Add 3.54% 0.14 $130.27 $104,927,000 SEC
2016   Q1 777,949 3.46 Add 11.13% 0.35 $117.13 $91,121,000 SEC
2015   Q4 700,037 3.20 Reduce 4.85% 0.13 $123.64 $86,553,000 SEC
2015   Q3 735,729 2.72 Add 2.06% 0.06 $108.47 $79,805,000 SEC
2015   Q2 720,849 2.73 Reduce 3.40% 0.10 $121.22 $87,381,000 SEC
2015   Q1 746,258 2.84 Reduce 25.12% 0.85 $126.09 $94,096,000 SEC
2014   Q4 996,606 3.40 Add 0.78% 0.03 $107.90 $107,534,000 SEC
2014   Q3 988,891 3.38 Reduce 1.09% 0.04 $101.75 $100,620,000 SEC
2014   Q2 999,816 3.48 Add 0.21% <0.01 $102.40 $102,381,000 SEC
2014   Q1 997,770 3.56 Add 10.49% 0.34 $98.21 $97,991,000 SEC
2013   Q4 903,010 3.21 Add 32.70% 0.79 $91.37 $82,508,000 SEC
2013   Q3 680,480 2.90 Add 11.09% 0.29 $99.14 $67,463,000 SEC
2013   Q2 612,550 2.86 Buy 2.86 $100.10 $61,316,000 SEC
2012   Q2 0 0.00 Sell 100.00% 2.99 SEC
2011   Q3 570,803 2.99 Add 11.34% 0.30 $79.05 $45,122,000 SEC
2011   Q2 512,673 2.62 Add 5.79% 0.14 $96.79 $49,622,000 SEC
2011   Q1 484,635 2.49 Add 0.44% 0.01 $92.13 $44,649,000 SEC
2010   Q4 482,500 2.53 $87.92 $42,421,000 SEC
2010   Q3 482,500 2.35 Add 33.14% 0.58 $78.43 $37,842,000 SEC
2010   Q2 362,400 2.07 Buy 2.07 $75.35 $27,307,000 SEC
2010   Q1 0 0.00 Sell 100.00% 0.83 SEC
2009   Q4 273,100 0.83 Add 6.97% 0.05 $74.84 $20,439,000 SEC
2009   Q3 255,300 1.32 Add 39.05% 0.37 $65.70 $16,773,000 SEC
2009   Q2 183,600 0.45 Add 1.38% <0.01 $67.79 $12,446,000 SEC
2009   Q1 181,100 0.94 Add 1,624.76% 0.89 $58.49 $10,593,000 SEC
2006   Q4 10,500 0.02 Buy 0.02 $73.43 $771,000 SEC
2006   Q2 0 0.00 Sell 100.00% 0.25 SEC
2005   Q4 441,500 0.25 Buy 0.25 $53.85 $23,775,000 SEC
2004   Q4 0 0.00 Sell 100.00% 0.78 SEC
2004   Q2 1,909,300 0.78 Buy 0.78 $39.70 $75,799,000 SEC