William Frels - Mairs & Power
Period:    Q1 2026
Portfolio date:    31 Mar 2026
No. of stocks:    245
Portfolio value:    $9,786,094,433
Holdings Activity Buys Sells    History
Holding/activity history for  Core Laboratories Inc. (CLB)
← All CLB superinvestors
Period Shares % of Portfolio Activity % Change to Portfolio Price Value Filing
2022   Q2 0 0.00 Sell 100.00% <0.01 $18.41–34.08 · VW $26.05i SEC
2022   Q1 8,685 <0.01 Reduce 4.40% <0.01 $22.37–35.83 · VW $28.87i $275,000 SEC
2021   Q4 9,085 <0.01 $22.34 $203,000 SEC
2021   Q3 9,085 <0.01 Reduce 12.94% <0.01 $23.74–40.97 · VW $30.66i $252,000 SEC
2021   Q2 10,435 <0.01 Reduce 86.83% 0.02 $25.57–49.87 · VW $37.14i $406,000 SEC
2021   Q1 79,263 0.02 Reduce 35.21% 0.01 $26.50–41.99 · VW $33.14i $2,282,000 SEC
2020   Q4 122,345 0.04 Reduce 55.42% 0.03 $13.43–29.85 · VW $20.57i $3,243,000 SEC
2020   Q3 274,442 0.05 Reduce 23.12% 0.02 $15.03–25.56 · VW $20.67i $4,188,000 SEC
2020   Q2 356,982 0.09 Reduce 67.32% 0.11 $9.01–29.59 · VW $19.19i $7,254,000 SEC
2020   Q1 1,092,405 0.16 Add 7.64% 0.01 $6.68–41.61 · VW $21.52i $11,295,000 SEC
2019   Q4 1,014,889 0.43 Add 18.73% 0.07 $36.50–49.22 · VW $43.15i $38,231,000 SEC
2019   Q3 854,821 0.48 Add 123.46% 0.27 $36.61–56.03 · VW $46.40i $39,852,000 SEC
2019   Q2 382,541 0.24 Add 14.91% 0.03 $46.32–75.63 · VW $56.86i $19,999,000 SEC
2019   Q1 332,899 0.28 Add 80.70% 0.13 $57.84–72.65 · VW $66.46i $22,947,000 SEC
2018   Q4 184,225 0.15 Add 78.89% 0.07 $56.72–122.11 · VW $82.78i $10,991,000 SEC
2018   Q3 102,985 0.14 Buy 0.14 $106.16–122.03 · VW $113.86i $11,929,000 SEC
2012   Q1 0 0.00 Sell 100.00% <0.01 $104.81–133.85 · VW $119.38i SEC
2011   Q4 2,235 <0.01 $114.09 $255,000 SEC
2011   Q3 2,235 <0.01 $89.93 $201,000 SEC
2011   Q2 2,235 <0.01 Buy <0.01 $88.94–112.10 · VW $101.79i $249,000 SEC
Price snapshot:
Current price$11.45
52-week low$9.70
52-week high$20.33