John Rogers - Ariel Investments
Period:    Q1 2026
Portfolio date:    31 Mar 2026
No. of stocks:    106
Portfolio value:    $8,934,260,435
Holdings Activity Buys Sells    History
Holding/activity history for  Quest Diagnostics Inc. (DGX)
← All DGX superinvestors
Period Shares % of Portfolio Activity % Change to Portfolio Price Value Filing
2020   Q2 0 0.00 Sell 100.00% 0.83 $73.02–125.00 · VW $108.95i SEC
2020   Q1 592,375 0.83 Add 47.55% 0.27 $73.21–118.58 · VW $97.54i $47,568,000 SEC
2019   Q4 401,466 0.54 Reduce 2.34% 0.01 $99.57–108.95 · VW $104.60i $42,873,000 SEC
2019   Q3 411,068 0.59 Add 2.76% 0.02 $96.94–107.97 · VW $102.52i $43,997,000 SEC
2019   Q2 400,014 0.52 Add 1.59% <0.01 $84.32–102.50 · VW $95.74i $40,725,000 SEC
2019   Q1 393,751 0.44 Add 11.22% 0.04 $79.93–90.57 · VW $86.58i $35,406,000 SEC
2018   Q4 354,042 0.41 Add 36.03% 0.11 $78.95–108.76 · VW $91.38i $29,481,000 SEC
2018   Q3 260,261 0.31 Add 6.84% 0.02 $104.45–115.64 · VW $109.02i $28,085,000 SEC
2018   Q2 243,599 0.31 Add 1.31% <0.01 $96.59–116.49 · VW $104.97i $26,781,000 SEC
2018   Q1 240,442 0.28 Reduce 3.10% <0.01 $95.27–108.81 · VW $102.50i $24,116,000 SEC
2017   Q4 248,132 0.28 Add 85.39% 0.13 $90.10–102.62 · VW $95.85i $24,439,000 SEC
2017   Q3 133,840 0.15 Reduce 18.47% 0.04 $91.67–112.97 · VW $103.48i $12,533,000 SEC
2017   Q2 164,157 0.22 Reduce 25.59% 0.07 $96.91–111.87 · VW $106.67i $18,248,000 SEC
2017   Q1 220,617 0.26 Reduce 40.68% 0.17 $90.13–100.00 · VW $95.37i $21,662,000 SEC
2016   Q4 371,880 0.42 Reduce 8.17% 0.04 $79.12–93.57 · VW $85.75i $34,176,000 SEC
2016   Q3 404,984 0.43 Reduce 10.90% 0.05 $80.27–86.85 · VW $83.95i $34,274,000 SEC
2016   Q2 454,535 0.49 Reduce 39.16% 0.26 $70.92–81.41 · VW $77.09i $37,004,000 SEC
2016   Q1 747,094 0.67 Add 7.77% 0.05 $59.66–72.64 · VW $67.28i $53,380,000 SEC
2015   Q4 693,253 0.62 Reduce 0.36% <0.01 $60.15–72.43 · VW $67.38i $49,318,000 SEC
2015   Q3 695,732 0.56 Add 19.84% 0.09 $60.07–75.25 · VW $68.79i $42,767,000 SEC
2015   Q2 580,555 0.51 Add 12.52% 0.06 $69.47–89.00 · VW $75.17i $42,102,000 SEC
2015   Q1 515,958 0.49 Add 33.49% 0.12 $66.09–78.33 · VW $72.04i $39,651,000 SEC
2014   Q4 386,508 0.33 Add 10.78% 0.03 $56.27–68.51 · VW $63.39i $25,919,000 SEC
2014   Q3 348,910 0.30 Reduce 1.14% <0.01 $58.56–64.38 · VW $61.46i $21,172,000 SEC
2014   Q2 352,928 0.28 Add 19.57% 0.05 $54.90–62.42 · VW $58.40i $20,713,000 SEC
2014   Q1 295,159 0.23 Add 10.11% 0.02 $50.46–60.50 · VW $54.23i $17,096,000 SEC
2013   Q4 268,053 0.20 Add 447.73% 0.16 $52.50–64.10 · VW $58.99i $14,352,000 SEC
2013   Q3 48,939 0.05 Add 557.34% 0.04 $56.81–62.82 · VW $59.62i $3,024,000 SEC
2013   Q2 7,445 0.01 $60.58 $451,000 SEC
2013   Q1 7,445 <0.01 Add 38.93% <0.01 $55.16–61.95 · VW $57.58i $420,000 SEC
2012   Q4 5,359 <0.01 $58.22 $312,000 SEC
2012   Q3 5,359 <0.01 $63.44 $340,000 SEC
2012   Q2 5,359 <0.01 Buy <0.01 $53.25–62.32 · VW $58.03i $321,000 SEC
Price snapshot:
Current price$207.35
52-week low$161.81
52-week high$218.31