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)
← All LAB superinvestors
Period Shares % of Portfolio Activity % Change to Portfolio Price Value Filing
2023   Q3 0 0.00 Sell 100.00% <0.01 $1.88–3.16 · VW $2.74i SEC
2023   Q2 1,160 <0.01 $241.33 $279,943 SEC
2023   Q1 1,160 <0.01 Reduce 34.79% <0.01 $1.16–2.38 · VW $1.91i $266,127 SEC
2022   Q4 1,779 <0.01 Buy <0.01 $0.92–1.57 · VW $1.26i $418,919 SEC
2017   Q2 0 0.00 Sell 100.00% <0.01 $3.54–6.20 · VW $4.75i SEC
2017   Q1 2,230 <0.01 Reduce 4.17% <0.01 $4.75–8.69 · VW $6.38i $320,000 SEC
2016   Q4 2,327 <0.01 Add 6.50% <0.01 $4.31–8.31 · VW $6.09i $299,000 SEC
2016   Q3 2,185 <0.01 Buy <0.01 $7.76–10.94 · VW $9.32i $300,000 SEC
2016   Q1 0 0.00 Sell 100.00% 0.01 $4.84–10.98 · VW $7.20i SEC
2015   Q4 17,560 0.01 Reduce 93.59% 0.18 $7.20–12.09 · VW $10.37i $2,171,000 SEC
2015   Q3 273,766 0.19 Reduce 61.94% 0.31 $7.87–24.43 · VW $14.26i $29,695,000 SEC
2015   Q2 719,376 0.50 Reduce 1.20% <0.01 $22.00–45.64 · VW $29.09i $87,203,000 SEC
2015   Q1 728,078 0.52 Reduce 12.35% 0.06 $32.43–46.38 · VW $40.23i $91,803,000 SEC
2014   Q4 830,648 0.49 Reduce 46.70% 0.41 $21.71–34.17 · VW $29.32i $89,627,000 SEC
2014   Q3 1,558,296 0.88 Reduce 5.82% 0.06 $24.41–32.48 · VW $28.15i $158,557,000 SEC
2014   Q2 1,654,529 0.96 Reduce 26.69% 0.35 $24.90–46.02 · VW $32.96i $169,424,000 SEC
2014   Q1 2,256,910 1.32 Reduce 6.16% 0.08 $34.77–49.46 · VW $43.86i $221,651,000 SEC
2013   Q4 2,405,081 1.33 Add 4.13% 0.05 $21.41–39.59 · VW $32.27i $219,752,000 SEC
2013   Q3 2,309,603 1.53 Add 1.81% 0.03 $16.16–23.39 · VW $19.94i $228,974,000 SEC
2013   Q2 2,268,529 1.57 Reduce 1.66% 0.02 $15.72–19.96 · VW $17.36i $227,080,000 SEC
2013   Q1 2,306,707 1.49 Add 185.13% 0.97 $14.00–19.49 · VW $17.02i $208,065,000 SEC
2012   Q4 808,992 0.59 Add 1010.32% 0.53 $13.43–17.23 · VW $14.72i $70,075,000 SEC
2012   Q3 72,861 0.06 Reduce 4.11% <0.01 $12.55–17.23 · VW $15.26i $6,737,000 SEC
2012   Q2 75,986 0.08 Buy 0.08 $12.53–16.29 · VW $14.48i $7,037,000 SEC
2011   Q3 0 0.00 Sell 100.00% 0.12 $11.64–20.20 · VW $14.99i SEC
2011   Q2 130,746 0.12 Reduce 92.99% 1.42 $13.50–18.24 · VW $15.75i $12,655,000 SEC
2011   Q1 1,865,246 1.53 Reduce 7.84% 0.14 $13.65–16.97 · VW $14.98i
IPO/listing quarter
$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
Price snapshot:
Current price$0.85
52-week low$0.70
52-week high$1.72