IDXX Institutional Ownership & Shareholders
IDEXX LABORATORIES INC (IDXX) is currently held by 1,285 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $37.66B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of IDXX tracked by InsiderSet, reporting ownership valued at approximately $4.30B in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $4.50B, representing an estimated gain of +4.71% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 46% of the total disclosed IDXX value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, Vanguard Portfolio Management Llc, and several other long-term asset managers with concentrated positions in IDEXX LABORATORIES INC (IDXX).
This page ranks the largest institutional IDXX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
1,285
Total Reported Value
$37.66B
Largest Holder
Blackrock, Inc.
Largest Position
$4.30B
Insider Transactions (90d)
3
Latest Filing Quarter
Q2 2026
New Institutional Positions
26
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.06% | 8,170,178 | $4,301,108,318 | $4,503,483,815 | +$202,375,497 | +4.71% | |
| Vanguard Capital Management Llc | 0.06% | 5,152,213 | $2,712,331,011 | $2,839,951,328 | +$127,620,317 | +4.71% | |
| Vanguard Portfolio Management Llc | 0.09% | 3,896,521 | $2,051,284,515 | $2,147,801,340 | +$96,516,825 | +4.71% | |
| State Street Corp | 0.06% | 3,748,660 | $1,973,444,570 | $2,066,298,879 | +$92,854,309 | +4.71% | |
| Invesco Ltd. | 0.15% | 3,611,416 | $1,901,193,880 | $1,990,648,613 | +$89,454,733 | +4.71% | |
| Geode Capital Management, Llc | 0.07% | 2,562,886 | $1,345,877,922 | $1,412,688,392 | +$66,810,470 | +4.96% | |
| Bamco Inc | 1.56% | 1,976,778 | $1,040,655,010 | $1,089,619,801 | +$48,964,791 | +4.71% | |
| Morgan Stanley | 0.04% | 1,356,103 | $713,908,136 | $747,497,535 | +$33,589,399 | +4.71% | |
| Bank Of New York Mellon Corp | 0.10% | 1,193,343 | $628,223,174 | $657,782,595 | +$29,559,421 | +4.71% | |
| Arrowstreet Capital, Limited Partnership | 0.25% | 1,067,078 | $561,752,542 | $588,184,064 | +$26,431,522 | +4.71% | |
| Fundsmith | Terry Smith | 3.93% | 1,019,887 | $536,909,312 | $562,171,913 | +$25,262,601 | +4.71% |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.10% | 871,789 | $489,849,521 | $480,538,815 | -$9,310,706 | -1.90% | |
| Blair William & Co/Il | 1.26% | 918,556 | $483,564,860 | $506,317,253 | +$22,752,393 | +4.71% | |
| Northern Trust Corp | 0.06% | 918,137 | $483,344,042 | $506,086,296 | +$22,742,254 | +4.71% | |
| Fmr Llc | 0.02% | 822,643 | $433,072,386 | $453,449,048 | +$20,376,662 | +4.71% | |
| American Century Companies Inc | 0.19% | 808,358 | $425,551,985 | $445,575,013 | +$20,023,028 | +4.71% | |
| Capital Research Global Investors | 0.06% | 789,111 | $415,467,340 | $434,965,874 | +$19,498,534 | +4.69% | |
| Jpmorgan Chase & Co | 0.02% | 755,791 | $405,051,944 | $416,599,557 | +$11,547,613 | +2.85% | |
| Goldman Sachs Group Inc | 0.04% | 738,708 | $388,885,762 | $407,183,237 | +$18,297,475 | +4.71% | |
| Wellington Management Group Llp | 0.07% | 726,695 | $382,561,317 | $400,561,551 | +$18,000,234 | +4.71% | |
| Charles Schwab Investment Management Inc | 0.05% | 650,429 | $342,411,843 | $358,522,969 | +$16,111,126 | +4.71% | |
| Legal & General Group Plc | 0.07% | 617,197 | $324,917,190 | $340,205,158 | +$15,287,968 | +4.71% | |
| Dimensional Fund Advisors Lp | 0.06% | 608,902 | $320,591,686 | $335,632,871 | +$15,041,185 | +4.69% | |
| Polen Capital Management | David M. Polen | 2.41% | 532,384 | $280,268,269 | $293,455,385 | +$13,187,116 | +4.71% |
| Australiansuper Pty Ltd | 1.18% | 518,860 | $273,148,658 | $286,000,821 | +$12,852,163 | +4.71% | |
| Nuveen, Llc | 0.06% | 484,519 | $255,070,030 | $267,071,718 | +$12,001,688 | +4.71% | |
| Bank Of America Corp | 0.02% | 476,998 | $251,111,058 | $262,926,068 | +$11,815,010 | +4.71% | |
| Price T Rowe Associates Inc | 0.02% | 458,318 | $241,278,000 | $252,629,465 | +$11,351,465 | +4.70% | |
| Vanguard Fiduciary Trust Co | 0.05% | 451,663 | $237,773,470 | $248,961,162 | +$11,187,692 | +4.71% | |
| Nomura Asset Management International Inc. | 0.33% | 421,519 | $221,904,000 | $232,345,488 | +$10,441,488 | +4.71% | |
| Capital Counsel Llc/Ny | 8.62% | 419,151 | $220,657,852 | $231,040,223 | +$10,382,371 | +4.71% | |
| Alyeska Investment Group, L.P. | 0.54% | 401,082 | $211,145,608 | $221,080,409 | +$9,934,801 | +4.71% | |
| Clearbridge Investments, Llc | 0.17% | 379,502 | $199,784,875 | $209,185,297 | +$9,400,422 | +4.71% | |
| Deutsche Bank Ag\ | 0.06% | 377,951 | $198,968,524 | $208,330,371 | +$9,361,847 | +4.71% | |
| Ubs Group Ag | 0.03% | 364,663 | $191,973,190 | $201,005,892 | +$9,032,702 | +4.71% | |
| Norges Bank | 0.02% | 353,944 | $186,330,279 | $195,097,472 | +$8,767,193 | +4.71% | |
| Baillie Gifford & Co | 0.17% | 353,797 | $186,252,892 | $195,016,444 | +$8,763,552 | +4.71% | |
| Neuberger Berman Group Llc | 0.14% | 274,797 | $185,908,221 | $151,470,854 | -$34,437,367 | -18.52% | |
| Cibc Bancorp Usa Inc. | 0.23% | 346,891 | $182,985,214 | $191,209,788 | +$8,224,574 | +4.49% | |
| Massachusetts Financial Services Co | 0.06% | 336,986 | $179,738,731 | $185,750,053 | +$6,011,322 | +3.34% | |
| Fundsmith Investment Services | Terry Smith | 3.81% | 327,058 | $172,176,414 | $180,277,640 | +$8,101,226 | +4.71% |
| Squarepoint Ops Llc | 0.32% | 315,164 | $165,914,936 | $173,721,548 | +$7,806,612 | +4.71% | |
| Montrusco Bolton Investments Inc. | 2.87% | 317,110 | $165,591,671 | $174,794,203 | +$9,202,532 | +5.56% | |
| William Blair Investment Management, Llc | 0.47% | 298,154 | $156,960,192 | $164,345,466 | +$7,385,274 | +4.71% | |
| Bessemer Group Inc | 0.21% | 288,814 | $152,041,000 | $159,197,165 | +$7,156,165 | +4.71% | |
| Royal Bank Of Canada | 0.02% | 274,340 | $144,424,000 | $151,218,951 | +$6,794,951 | +4.70% | |
| Point72 Asset Management, L.P. | 0.21% | 262,905 | $138,403,708 | $144,915,865 | +$6,512,157 | +4.71% | |
| Raymond James Financial Inc | 0.04% | 262,791 | $138,343,696 | $144,853,027 | +$6,509,331 | +4.71% | |
| Comgest Global Investors S.A.S. | 3.04% | 262,562 | $138,223,139 | $144,726,800 | +$6,503,661 | +4.71% | |
| Williams Jones Wealth Management, Llc. | 1.55% | 261,303 | $137,560,352 | $144,032,827 | +$6,472,475 | +4.71% |
Frequently asked questions about IDXX
Who are the largest institutional holders of IDXX?
The largest institutional holders of IDXX reported in the latest SEC Form 13F filings include Blackrock, Inc., Vanguard Capital Management Llc, Vanguard Portfolio Management Llc, State Street Corp, and Invesco Ltd.. InsiderSet ranks institutional holders by their latest reported IDXX position.
What is IDXX institutional ownership?
This page tracks IDXX positions reported by institutional investment managers through SEC Form 13F. IDEXX LABORATORIES INC (IDXX) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own IDXX?
InsiderSet currently tracks 1,285 institutional managers reporting IDXX holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of IDXX shareholders.
How much IDXX stock do institutions own?
Institutional investment managers disclosed approximately $37.66B in IDXX holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was IDXX institutional ownership last updated?
The latest IDXX institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional IDXX holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its IDXX position after the reporting date.
Are institutions buying or selling IDXX?
Institutional buying and selling can be analyzed by comparing IDXX positions across consecutive 13F reporting periods. InsiderSet's IDXX Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View IDXX ownership changes.
How has IDXX institutional ownership changed over time?
InsiderSet tracks IDXX institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.