Funds holding IDEXX Laboratories Inc
981 funds declare a position · 273 ETFs and 708 other funds · 17.7B $· 1.4B SEK· 22.9M € · US45168D1046
Each line carries its report date.
| Rank | Fund | Shares | Value | Weight | |
|---|---|---|---|---|---|
| 1 | VANGUARD TOTAL STOCK MARKET INDEX FUND VANGUARD INDEX FUNDS | 2,527,800 | 1.4B $ | 0.07 % | as of Mar 31, 2026 · Original filing |
| 2 | VANGUARD 500 INDEX FUND VANGUARD INDEX FUNDS | 2,030,133 | 1.1B $ | 0.08 % | as of Mar 31, 2026 · Original filing |
| 3 | VANGUARD MID-CAP INDEX FUND VANGUARD INDEX FUNDS | 1,719,572 | 966.2M $ | 0.49 % | as of Mar 31, 2026 · Original filing |
| 4 | Invesco QQQ Trust, Series 1 Invesco QQQ Trust, Series 1 | 1,677,361 | 942.5M $ | 0.25 % | as of Mar 31, 2026 · Original filing |
| 5 | iShares Core S&P 500 ETF iShares Trust | 1,027,534 | 577.4M $ | 0.08 % | as of Mar 31, 2026 · Original filing |
| 6 | Fidelity 500 Index Fund Fidelity Concord Street Trust | 1,016,204 | 667.4M $ | 0.09 % | as of Feb 28, 2026 · Original filing |
| 7 | VANGUARD GROWTH INDEX FUND VANGUARD INDEX FUNDS | 927,080 | 520.9M $ | 0.16 % | as of Mar 31, 2026 · Original filing |
| 8 | AMCAP Fund AMCAP Fund | 732,861 | 481.3M $ | 0.51 % | as of Feb 28, 2026 · Original filing |
| 9 | Baron Partners Fund BARON SELECT FUNDS | 620,000 | 348.4M $ | 3.36 % | as of Mar 31, 2026 · Original filing |
| 10 | VANGUARD MID-CAP GROWTH INDEX FUND VANGUARD INDEX FUNDS | 605,627 | 340.3M $ | 1.16 % | as of Mar 31, 2026 · Original filing |
| 11 | State Street(R) Health Care Select Sector SPDR(R) ETF SELECT SECTOR SPDR TRUST | 581,073 | 326.5M $ | 0.85 % | as of Mar 31, 2026 · Original filing |
| 12 | iShares Russell Mid-Cap Growth ETF iShares Trust | 534,598 | 300.4M $ | 1.61 % | as of Mar 31, 2026 · Original filing |
| 13 | Washington Mutual Investors Fund Washington Mutual Investors Fund | 454,667 | 255M $ | 0.12 % | as of Apr 30, 2026 · Original filing |
| 14 | VANGUARD INSTITUTIONAL INDEX FUND VANGUARD INSTITUTIONAL INDEX FUNDS | 450,237 | 253M $ | 0.08 % | as of Mar 31, 2026 · Original filing |
| 15 | MidCap Fund Principal Funds, Inc | 443,929 | 249M $ | 0.99 % | as of Apr 30, 2026 · Original filing |
| 16 | iShares Russell 1000 Growth ETF iShares Trust | 321,242 | 180.5M $ | 0.16 % | as of Mar 31, 2026 · Original filing |
| 17 | VANGUARD U.S. GROWTH FUND VANGUARD WORLD FUND | 311,865 | 204.8M $ | 0.47 % | as of Feb 28, 2026 · Original filing |
| 18 | BlackRock Mid-Cap Growth Equity Portfolio BlackRock Funds | 308,714 | 202.7M $ | 3.43 % | as of Feb 27, 2026 · Original filing |
| 19 | iShares Russell Mid-Cap ETF iShares Trust | 304,554 | 171.1M $ | 0.35 % | as of Mar 31, 2026 · Original filing |
| 20 | Invesco NASDAQ 100 ETF Invesco Exchange-Traded Fund Trust II | 303,679 | 199.4M $ | 0.28 % | as of Feb 28, 2026 · Original filing |
| 21 | Fidelity Mid Cap Index Fund Fidelity Salem Street Trust | 295,111 | 165.5M $ | 0.33 % | as of Apr 30, 2026 · Original filing |
| 22 | Invesco S&P 500 Equal Weight ETF Invesco Exchange-Traded Fund Trust | 280,907 | 157.5M $ | 0.18 % | as of Apr 30, 2026 · Original filing |
| 23 | BARON ASSET FUND BARON INVESTMENT FUNDS TRUST (f/k/a BARON ASSET FUND) | 269,176 | 151.2M $ | 4.56 % | as of Mar 31, 2026 · Original filing |
| 24 | Ultra Fund American Century Mutual Funds, Inc. | 257,000 | 144.1M $ | 0.54 % | as of Apr 30, 2026 · Original filing |
| 25 | iShares U.S. Medical Devices ETF iShares Trust | 250,804 | 140.9M $ | 4.44 % | as of Mar 31, 2026 · Original filing |
| 26 | iShares MSCI USA Quality Factor ETF iShares Trust | 250,492 | 140.5M $ | 0.28 % | as of Apr 30, 2026 · Original filing |
| 27 | Fidelity SAI U.S. Quality Index Fund Fidelity Salem Street Trust | 243,874 | 136.8M $ | 0.47 % | as of Apr 30, 2026 · Original filing |
| 28 | VANGUARD HEALTH CARE INDEX FUND VANGUARD WORLD FUND | 240,318 | 157.8M $ | 0.78 % | as of Feb 28, 2026 · Original filing |
| 29 | JPMorgan Mid Cap Growth Fund JPMorgan Trust II | 239,371 | 134.5M $ | 1.18 % | as of Mar 31, 2026 · Original filing |
| 30 | Baron Focused Growth Fund BARON SELECT FUNDS | 238,900 | 134.2M $ | 3.48 % | as of Mar 31, 2026 · Original filing |
| 31 | Nomura Mid Cap Growth Fund IVY FUNDS | 204,894 | 115.1M $ | 3.84 % | as of Mar 31, 2026 · Original filing |
| 32 | T. Rowe Price All-Cap Opportunities Fund T. Rowe Price All-Cap Opportunities Fund, Inc. | 203,808 | 114.5M $ | 0.80 % | as of Mar 31, 2026 · Original filing |
| 33 | BARON GROWTH FUND BARON INVESTMENT FUNDS TRUST (f/k/a BARON ASSET FUND) | 200,000 | 112.4M $ | 4.30 % | as of Mar 31, 2026 · Original filing |
| 34 | Invesco S&P 500 Quality ETF Invesco Exchange-Traded Fund Trust | 187,252 | 105M $ | 0.61 % | as of Apr 30, 2026 · Original filing |
| 35 | Schwab S&P 500 Index Fund SCHWAB CAPITAL TRUST | 176,964 | 99.2M $ | 0.07 % | as of Apr 30, 2026 · Original filing |
| 36 | Invesco Discovery Mid Cap Growth Fund AIM Investment Funds (Invesco Investment Funds) | 168,982 | 94.8M $ | 1.41 % | as of Apr 30, 2026 · Original filing |
| 37 | iShares S&P 500 Growth ETF iShares Trust | 167,796 | 94.3M $ | 0.15 % | as of Mar 31, 2026 · Original filing |
| 38 | State Street(R) SPDR(R) Portfolio S&P 500(R) ETF SPDR SERIES TRUST | 167,768 | 94.3M $ | 0.08 % | as of Mar 31, 2026 · Original filing |
| 39 | AP7 Aktiefond Sjunde AP-fonden | 154,324 | 826.1M SEK | 0.06 % | as of Mar 31, 2026 · Original filing |
| 40 | Schwab U.S. Large-Cap Growth ETF SCHWAB STRATEGIC TRUST | 153,087 | 100.5M $ | 0.20 % | as of Feb 28, 2026 · Original filing |
| 41 | Fidelity Total Market Index Fund Fidelity Concord Street Trust | 149,297 | 98M $ | 0.08 % | as of Feb 28, 2026 · Original filing |
| 42 | Carillon Eagle Mid Cap Growth Fund Carillon Series Trust | 140,990 | 79.2M $ | 1.66 % | as of Mar 31, 2026 · Original filing |
| 43 | Calvert Equity Fund Calvert Social Investment Fund | 140,669 | 79M $ | 2.08 % | as of Mar 31, 2026 · Original filing |
| 44 | Putnam Large Cap Growth Fund Putnam Investment Funds | 139,648 | 78.3M $ | 0.57 % | as of Apr 30, 2026 · Original filing |
| 45 | VANGUARD RUSSELL 1000 GROWTH INDEX FUND VANGUARD SCOTTSDALE FUNDS | 131,070 | 86.1M $ | 0.18 % | as of Feb 28, 2026 · Original filing |
| 46 | T. Rowe Price Diversified Mid-Cap Growth Fund, Inc. T. ROWE PRICE DIVERSIFIED MID-CAP GROWTH FUND, INC. | 123,800 | 69.6M $ | 1.63 % | as of Mar 31, 2026 · Original filing |
| 47 | First Trust Water ETF First Trust Exchange-Traded Fund | 119,181 | 67M $ | 3.76 % | as of Mar 31, 2026 · Original filing |
| 48 | Fidelity Series Total Market Index Fund Fidelity Concord Street Trust | 118,117 | 77.6M $ | 0.08 % | as of Feb 28, 2026 · Original filing |
| 49 | Federated Hermes MDT Mid Cap Growth Fund Federated Hermes Equity Funds | 115,168 | 64.6M $ | 1.01 % | as of Apr 30, 2026 · Original filing |
| 50 | State Street(R) SPDR(R) Portfolio S&P 500(R) Growth ETF SPDR SERIES TRUST | 114,670 | 64.4M $ | 0.15 % | as of Mar 31, 2026 · Original filing |
| 51 | Fidelity Large Cap Growth Index Fund Fidelity Salem Street Trust | 113,297 | 63.5M $ | 0.14 % | as of Apr 30, 2026 · Original filing |
| 52 | Heritage Fund American Century Mutual Funds, Inc. | 109,099 | 61.2M $ | 1.14 % | as of Apr 30, 2026 · Original filing |
| 53 | Dimensional US High Profitability ETF Dimensional ETF Trust | 105,784 | 59.3M $ | 0.52 % | as of Apr 30, 2026 · Original filing |
| 54 | ClearBridge Growth Fund Legg Mason Partners Investment Trust | 104,800 | 68.8M $ | 1.64 % | as of Feb 27, 2026 · Original filing |
| 55 | iShares Core S&P Total U.S. Stock Market ETF iShares Trust | 100,394 | 56.4M $ | 0.07 % | as of Mar 31, 2026 · Original filing |
| 56 | Franklin Dynatech Fund Franklin Custodian Funds | 100,000 | 56.2M $ | 0.23 % | as of Mar 31, 2026 · Original filing |
| 57 | Fidelity Mid Cap Growth Index Fund Fidelity Salem Street Trust | 97,312 | 54.7M $ | 1.61 % | as of Mar 31, 2026 · Original filing |
| 58 | Nomura Large Cap Growth Fund IVY FUNDS | 96,815 | 54.4M $ | 0.93 % | as of Mar 31, 2026 · Original filing |
| 59 | Polen Growth Fund FundVantage Trust | 94,707 | 53.1M $ | 2.44 % | as of Apr 30, 2026 · Original filing |
| 60 | VANGUARD LARGE-CAP INDEX FUND VANGUARD INDEX FUNDS | 93,475 | 52.5M $ | 0.08 % | as of Mar 31, 2026 · Original filing |
| 61 | College Retirement Equities Fund - Responsible Balanced Account College Retirement Equities Fund | 92,240 | 51.8M $ | 0.25 % | as of Mar 31, 2026 · Original filing |
| 62 | Schwab U.S. Large-Cap ETF SCHWAB STRATEGIC TRUST | 82,312 | 54.1M $ | 0.08 % | as of Feb 28, 2026 · Original filing |
| 63 | THE HARTFORD MIDCAP FUND HARTFORD MUTUAL FUNDS, INC | 79,733 | 44.7M $ | 1.26 % | as of Apr 30, 2026 · Original filing |
| 64 | VANGUARD GROWTH AND INCOME FUND VANGUARD QUANTITATIVE FUNDS | 79,435 | 44.6M $ | 0.27 % | as of Mar 31, 2026 · Original filing |
| 65 | Neuberger Mid Cap Growth Fund NEUBERGER BERMAN EQUITY FUNDS | 77,272 | 50.7M $ | 2.55 % | as of Feb 28, 2026 · Original filing |
| 66 | Goldman Sachs ActiveBeta(R) U.S. Large Cap Equity ETF Goldman Sachs ETF Trust | 76,634 | 50.3M $ | 0.34 % | as of Feb 28, 2026 · Original filing |
| 67 | Franklin Small-Mid Cap Growth Fund Franklin Strategic Series | 75,336 | 42.2M $ | 1.20 % | as of Apr 30, 2026 · Original filing |
| 68 | BlackRock Health Sciences Opportunities Portfolio BlackRock Funds | 74,621 | 49M $ | 0.75 % | as of Feb 27, 2026 · Original filing |
| 69 | Invesco Global Fund AIM International Mutual Funds (Invesco International Mutual Funds) | 74,529 | 41.8M $ | 0.46 % | as of Apr 30, 2026 · Original filing |
| 70 | S&P 500 Index Master Portfolio Master Investment Portfolio | 72,624 | 40.8M $ | 0.08 % | as of Mar 31, 2026 · Original filing |
| 71 | ProShares UltraPro QQQ ProShares Trust | 68,619 | 45.1M $ | 0.17 % | as of Feb 28, 2026 · Original filing |
| 72 | iShares Core S&P U.S. Growth ETF iShares Trust | 67,493 | 37.9M $ | 0.15 % | as of Mar 31, 2026 · Original filing |
| 73 | iShares ESG Aware MSCI USA ETF iShares Trust | 67,442 | 44.3M $ | 0.28 % | as of Feb 28, 2026 · Original filing |
| 74 | Nuveen Equity Index Fund TIAA-CREF Funds | 66,982 | 37.6M $ | 0.06 % | as of Apr 30, 2026 · Original filing |
| 75 | JNL/JPMorgan MidCap Growth Fund JNL Series Trust | 65,833 | 37M $ | 1.19 % | as of Mar 31, 2026 · Original filing |
| 76 | LVIP Baron Growth Opportunities Fund LINCOLN VARIABLE INSURANCE PRODUCTS TRUST | 65,226 | 36.6M $ | 5.75 % | as of Mar 31, 2026 · Original filing |
| 77 | VANGUARD MID-CAP GROWTH FUND VANGUARD WHITEHALL FUNDS | 64,140 | 36M $ | 1.27 % | as of Apr 30, 2026 · Original filing |
| 78 | Nuveen Large Cap Responsible Equity Fund TIAA-CREF Funds | 64,139 | 36M $ | 0.56 % | as of Apr 30, 2026 · Original filing |
| 79 | Growth Fund American Century Mutual Funds, Inc. | 64,138 | 36M $ | 0.24 % | as of Apr 30, 2026 · Original filing |
| 80 | VANGUARD TOTAL WORLD STOCK INDEX FUND VANGUARD INTERNATIONAL EQUITY INDEX FUNDS | 64,108 | 36M $ | 0.04 % | as of Apr 30, 2026 · Original filing |
| 81 | iShares MSCI USA Momentum Factor ETF iShares Trust | 62,313 | 34.9M $ | 0.14 % | as of Apr 30, 2026 · Original filing |
| 82 | Dimensional U.S. Core Equity 2 ETF Dimensional ETF Trust | 60,307 | 33.8M $ | 0.08 % | as of Apr 30, 2026 · Original filing |
| 83 | Blue Chip Fund Principal Funds, Inc | 59,468 | 39.1M $ | 0.46 % | as of Feb 28, 2026 · Original filing |
| 84 | U.S. High Relative Profitability Portfolio DFA INVESTMENT DIMENSIONS GROUP INC | 59,422 | 33.3M $ | 0.55 % | as of Apr 30, 2026 · Original filing |
| 85 | AMG TimesSquare Mid Cap Growth Fund AMG Funds | 59,250 | 33.3M $ | 2.22 % | as of Mar 31, 2026 · Original filing |
| 86 | VANGUARD S&P 500 GROWTH INDEX FUND VANGUARD ADMIRAL FUNDS | 57,520 | 37.8M $ | 0.17 % | as of Feb 28, 2026 · Original filing |
| 87 | William Blair Large Cap Growth Fund WILLIAM BLAIR FUNDS | 57,490 | 32.3M $ | 1.77 % | as of Mar 31, 2026 · Original filing |
| 88 | Old Westbury Small & Mid Cap Strategies Fund Old Westbury Funds Inc | 57,088 | 32M $ | 0.34 % | as of Apr 30, 2026 · Original filing |
| 89 | iShares Russell 1000 ETF iShares Trust | 56,742 | 31.9M $ | 0.07 % | as of Mar 31, 2026 · Original filing |
| 90 | First Trust Nasdaq-100 Select Equal Weight ETF First Trust Exchange-Traded Fund | 55,470 | 31.2M $ | 1.99 % | as of Mar 31, 2026 · Original filing |
| 91 | Tax-Managed U.S. Large Cap Fund RUSSELL INVESTMENT CO | 52,668 | 29.5M $ | 0.25 % | as of Apr 30, 2026 · Original filing |
| 92 | VANGUARD EXPLORER FUND VANGUARD EXPLORER FUND | 52,397 | 29.4M $ | 0.14 % | as of Apr 30, 2026 · Original filing |
| 93 | Touchstone Strategic Trust-Touchstone Mid Cap Growth Fund Touchstone Strategic Trust | 51,459 | 28.9M $ | 1.60 % | as of Mar 31, 2026 · Original filing |
| 94 | T. Rowe Price Equity Index 500 Fund T. ROWE PRICE INDEX TRUST, INC. | 49,991 | 28.1M $ | 0.08 % | as of Mar 31, 2026 · Original filing |
| 95 | Nuveen Large Cap Growth Index Fund TIAA-CREF Funds | 48,741 | 27.3M $ | 0.15 % | as of Apr 30, 2026 · Original filing |
| 96 | Fidelity SAI U.S. Momentum Index Fund Fidelity Salem Street Trust | 47,654 | 26.7M $ | 0.33 % | as of Apr 30, 2026 · Original filing |
| 97 | Large Cap Index Master Portfolio Master Investment Portfolio | 47,628 | 26.8M $ | 0.07 % | as of Mar 31, 2026 · Original filing |
| 98 | Columbia Select Mid Cap Growth Fund COLUMBIA FUNDS SERIES TRUST I | 47,181 | 31M $ | 1.56 % | as of Feb 28, 2026 · Original filing |
| 99 | Schwab Total Stock Market Index Fund SCHWAB CAPITAL TRUST | 46,941 | 26.3M $ | 0.06 % | as of Apr 30, 2026 · Original filing |
| 100 | Schwab U.S. Broad Market ETF SCHWAB STRATEGIC TRUST | 46,480 | 30.5M $ | 0.08 % | as of Feb 28, 2026 · Original filing |
Institutional managers
1298 managers declare this company to the SEC (Form 13F). These positions are not counted in the totals above: a manager and its own funds file separately.
| Manager | Shares | Value | |
|---|---|---|---|
| BlackRock, Inc. | 8,365,553 | 4.7B $ | as of Mar 31, 2026 |
| STATE STREET CORP | 3,674,185 | 2.1B $ | as of Mar 31, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | 2,660,999 | 1.5B $ | as of Mar 31, 2026 |
| Invesco Ltd. | 1,678,556 | 943.2M $ | as of Mar 31, 2026 |
| BAMCO INC /NY/ | 1,633,367 | 917.8M $ | as of Mar 31, 2026 |
| Bank of New York Mellon Corp | 1,504,532 | 845.4M $ | as of Mar 31, 2026 |
| Fundsmith LLP | 1,465,786 | 823.6M $ | as of Mar 31, 2026 |
| MORGAN STANLEY | 1,315,954 | 739.4M $ | as of Mar 31, 2026 |
| BLAIR WILLIAM & CO/IL | 946,336 | 531.7M $ | as of Mar 31, 2026 |
| NORTHERN TRUST CORP | 911,893 | 512.4M $ | as of Mar 31, 2026 |
| PRINCIPAL FINANCIAL GROUP INC | 881,189 | 495.2M $ | as of Mar 31, 2026 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 871,789 | 489.8M $ | as of Mar 31, 2026 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 838,839 | 471.3M $ | as of Mar 31, 2026 |
| Capital Research Global Investors | 781,345 | 439M $ | as of Mar 31, 2026 |
| JPMORGAN CHASE & CO | 779,882 | 434.5M $ | as of Mar 31, 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | 735,475 | 413.3M $ | as of Mar 31, 2026 |
| GOLDMAN SACHS GROUP INC | 716,921 | 402.8M $ | as of Mar 31, 2026 |
| POLEN CAPITAL MANAGEMENT LLC | 695,811 | 391M $ | as of Mar 31, 2026 |
| FRANKLIN RESOURCES INC | 662,633 | 372.3M $ | as of Mar 31, 2026 |
| Legal & General Group Plc | 650,803 | 365.7M $ | as of Mar 31, 2026 |
| Amundi | 610,779 | 343.2M $ | as of Mar 31, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 610,217 | 342.9M $ | as of Mar 31, 2026 |
| AMERICAN CENTURY COMPANIES INC | 599,931 | 337.1M $ | as of Mar 31, 2026 |
| DIMENSIONAL FUND ADVISORS LP | 573,332 | 322.1M $ | as of Mar 31, 2026 |
| Capital World Investors | 497,851 | 279.7M $ | as of Mar 31, 2026 |