| Quarter | Holdings | Value ($000) | Top Holdings | Form Type | Date Filed | Filing ID |
|---|---|---|---|---|---|---|
| Q4 2023 | 52 | 2,034,530 | IDXX, COST, V, MSFT | 13F-HR | 2/14/2024 | 000111492824000001 |
| Q3 2023 | 52 | 1,797,064 | IDXX, COST, V, GOOG | 13F-HR | 11/13/2023 | 000111492823000005 |
| Q2 2023 | 52 | 1,814,977 | IDXX, MTD, V, COST | 13F-HR | 8/14/2023 | 000111492823000004 |
| Q1 2023 | 51 | 1,739,728 | MTD, IDXX, V, COST | 13F-HR | 5/15/2023 | 000111492823000003 |
| Q4 2022 | 52 | 1,589,380 | MTD, IDXX, V, COST | 13F-HR | 2/9/2023 | 000111492823000001 |
| Q3 2022 | 52 | 1,545,196 | MTD, COST, IDXX, ADP | 13F-HR | 11/14/2022 | 000111492822000005 |
| Q2 2022 | 51 | 1,640,916 | MTD, COST, IDXX, V | 13F-HR | 8/15/2022 | 000111492822000004 |
| Q1 2022 | 56 | 2,104,980 | IDXX, MTD, COST, GOOG | 13F-HR | 5/16/2022 | 000111492822000003 |
| Q4 2021 | 55 | 2,360,682 | MTD, IDXX, COST, GOOG | 13F-HR | 2/14/2022 | 000111492822000001 |
| Q3 2021 | 57 | 2,032,287 | IDXX, MTD, GOOG, V | 13F-HR | 11/12/2021 | 000111492821000005 |
| Q2 2021 | 58 | 1,990,908 | IDXX, MTD, V, GOOG | 13F-HR | 8/12/2021 | 000111492821000004 |
| Q1 2021 | 63 | 1,794,755 | IDXX, MTD, V, GOOG | 13F-HR | 5/12/2021 | 000111492821000003 |
| Q4 2020 | 62 | 1,707,279 | IDXX, MTD, V, COST | 13F-HR | 2/10/2021 | 000111492821000002 |
| Q3 2020 | 61 | 1,480,683 | IDXX, MTD, V, COST | 13F-HR | 11/16/2020 | 000111492820000008 |
| Q2 2020 | 58 | 1,376,550 | IDXX, MTD, V, CME | 13F-HR | 8/14/2020 | 000111492820000007 |
| Q1 2020 | 57 | 1,257,829 | IDXX, MTD, CME, V | 13F-HR | 5/15/2020 | 000111492820000006 |
| Q4 2019 | 61 | 1,506,092 | CME, IDXX, MTD, V | 13F-HR | 2/14/2020 | 000111492820000001 |
| Q3 2019 | 61 | 1,428,839 | CME, IDXX, MTD, V | 13F-HR | 11/14/2019 | 000111492819000006 |
| Q2 2019 | 57 | 1,492,951 | IDXX, MTD, CME, V | 13F-HR | 8/14/2019 | 000111492819000004 |
| Q1 2019 | 57 | 1,368,817 | MTD, IDXX, CME, V | 13F-HR | 5/15/2019 | 000111492819000003 |
| Q4 2018 | 54 | 1,205,574 | CME, IDXX, MTD, RHT | 13F-HR | 2/13/2019 | 000111492819000002 |
| Q3 2018 | 59 | 1,433,559 | IDXX, CME, MTD, V | 13F-HR | 11/14/2018 | 000111492818000009 |
| Q2 2018 | 56 | 1,310,385 | IDXX, CME, MTD, V | 13F-HR | 8/14/2018 | 000111492818000008 |
| Q1 2018 | 56 | 1,235,843 | CME, IDXX, MTD, V | 13F-HR | 5/14/2018 | 000111492818000006 |
| Q4 2017 | 63 | 1,216,387 | MTD, CME, IDXX, V | 13F-HR | 2/13/2018 | 000111492818000001 |
| Q3 2017 | 59 | 1,117,403 | MTD, CME, IDXX, V | 13F-HR | 11/14/2017 | 000111492817000009 |
| Q2 2017 | 59 | 1,097,880 | MTD, IDXX, CME, ADP | 13F-HR | 8/10/2017 | 000111492817000006 |
| Q1 2017 | 63 | 1,050,447 | IDXX, MTD, CME, ADP | 13F-HR | 5/12/2017 | 000111492817000004 |
| Q4 2016 | 57 | 966,974 | CME, ADP, MTD, ESRX | 13F-HR | 2/13/2017 | 000111492817000002 |
| Q3 2016 | 61 | 1,120,083 | SHY, ESRX, MTD, CME | 13F-HR | 11/14/2016 | 000111492816000015 |
| Q2 2016 | 56 | 1,084,495 | SHY, ESRX, MTD, ADP | 13F-HR | 8/10/2016 | 000111492816000013 |
| Q1 2016 | 61 | 1,106,082 | SHY, ESRX, MTD, ADP | 13F-HR | 5/13/2016 | 000111492816000012 |
| Q4 2015 | 131 | 1,885,038 | MTD, ESRX, ADP, V | 13F-HR | 2/11/2016 | 000111492816000010 |
| Q3 2015 | 122 | 1,915,556 | ESRX, MTD, WAB, ADP | 13F-HR | 11/13/2015 | 000111492815000008 |
| Q2 2015 | 137 | 2,020,020 | ESRX, MTD, WAB, ADP | RESTATEMENT | 9/28/2015 | 000111492815000007 |
| Q1 2015 | 134 | 2,098,037 | MTD, ESRX, WAB, ADP | 13F-HR | 5/13/2015 | 000111492815000004 |
| Q4 2014 | 130 | 2,129,129 | ESRX, MTD, ADP, WAB | 13F-HR | 2/11/2015 | 000111492815000002 |
| Q3 2014 | 132 | 1,778,038 | ESRX, MTD, ADP, WAB | 13F-HR | 11/12/2014 | 000111492814000006 |
| Q2 2014 | 135 | 1,834,286 | ESRX, MTD, WAB, ADP | 13F-HR | 8/12/2014 | 000111492814000005 |
| Q1 2014 | 137 | 1,831,637 | ESRX, WAB, ADP, MTD | 13F-HR | 5/12/2014 | 000111492814000004 |
| Q4 2013 | 143 | 1,785,736 | ESRX, ADP, MTD, WAB | 13F-HR | 2/12/2014 | 000111492814000001 |