William Blair Investment Management, Llc Buys TAL Education Group, Masimo Corp, Mercury Systems Inc, Sells Vail Resorts Inc, The Toronto-Dominion Bank, Sabre Corp

• New Purchases: MASI, SEDG, DPZ, COUP, BRKS, LECO, MDB, HQY, MBB, NKE, ALRM, TWST, EYE, WDAY, INSM, HCAT, HELE, SSD, CPK, STRA, BLD, DNKN, FSS, GC6, LSI, ROCK, CVCO, CASY, FAF, LITE, CE, ATGE, POR, MANT, DECK, HHR, IPG, ASML,
• Added Positions: TAL, MRCY, LOPE, BCO, CPRT, NTES, CCJ, LULU, YNDX, PRSP, MELI, NATI, ETSY, SE, LYV, NICE, ENTG, STE, VCYT, BWXT, PTLA, MLM, CYBR, PLNT, GSX, ZNGA, IRTC, ADSK, MA, FB, IDXX, COLD, HNGR, JPM, SBAC, TDY, WAL, HTHT, COR, IPHI, BOOT, ARCE, TME, EWZ, A, BAM, ESE, IDA, JCOM, LGND, SYK, TTC, DEI, CDXS, PEN, PSTG, AAP, ADC, AIN, AZPN, CCK, DCO, FCFS, CIGI, FORR, HR, ILMN, JLL, MMS, SIVB, TTWO, TNC, VMC, AWI, PLOW, GLOB, TRHC, LXFR, IEMG, AJG, KMX, DLB, EXP, GBCI, HALO, INTU, LHCG, MMSI, RBA, SCI, SBNY, TFX, WTFC, SPB, JBT, GNRC, CBOE, BAH, REXR, KN, ANET, OEC, FTV, ECH, ADBE, BLL, BLK, CWST, FIS, KO, CAG, CRY, FMC, PACW, HWC, HCSG, HMN, LRCX, AXGN, LAD, LFUS, LPSN, MTD, NDSN, MD, LIN, ROG, ROST, SIGI, SLP, SBUX, TXN, UMPQ, WEX, ULTA, QNST, AAT, APO, EPAM, OGS, VRNS, BLBD, ARES, PYPL, NGVT, LAUR, VRRM, STNE, XP, RAMP, BPFH, CNO, TCOM, EW, THG, NVR, OII, EDU, APTV, WB, TALO, EWM, RSX, SMIN,
• Reduced Positions: CHKP, GWRE, OLLI, PODD, BURL, W, EEFT, TREX, BAP, LW, PE, ABMD, TRU, ECPG, AVLR, SPY, EHC, QLYS, HZNP, VEEV, AMED, AMD, CNI, HDB, BABA, CRI, WIX, AKR, CW, CABO, BJ, ACN, BDC, IBN, WLDN, 9IFA, AVT, EL, FCN, JJSF, MDC, HOMB, NXPI, RPAY, MNRL, ATVI, AGYS, BKH, CP, DEO, GPN, HIW, UNF, UNH, WTS, HEI.A, PFPT, ICLR, MUSA, GOOG, SHOP, LQD, ABT, BANR, BRC, BRO, CRS, CSGP, CNMD, COST, DAR, FNB, BANC, ITGR, ASR, VIAV, MGLN, MCHP, MTX, NVS, NVO, OCFC, PNM, PHG, POL, STL, RDN, RELX, RNST, SAP, SASR, SBCF, SMTC, SXT, SLGN, WCN, WNS, AROC, TRNO, NBHC, EFA, EMB, EPI, IWO, IWP, JNK,
• Sold Out: MTN, TD, SABR, WWE, SITE, GKOS, AXTA, INSP, PLAN, GREK, RTN, AON, INDA, QGEN, XLP, PAGS, OSW, DIN, CIB, CVGW, LUV, EME, WSFS, PEB, MXL, G, BYD, WWW, SJI, EPR, FL, MLHR, IBKC, HABT, ORBC, AZUL, CBRL, HLX, CPE, DAN, PDCE, MIDD, CDNA, CGNX, IMAX, VICI, SOI, NR, CNK, MOBL, PRMW, VRSK, AZN, YUMC, CFX, OUT, IWF,

For the details of WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's stock buys and sells, go to https://www.gurufocus.com/guru/william+blair+investment+management%2C+llc/current-portfolio/portfolio

1. Alibaba Group Holding Ltd (BABA) - 5,597,636 shares, 5.31% of the total portfolio. Shares reduced by 1.31%
2. Taiwan Semiconductor Manufacturing Co Ltd (TSM) - 17,319,235 shares, 4.04% of the total portfolio. Shares reduced by 0.12%
3. SPDR S&P 500 (SPY) - 2,141,600 shares, 2.69% of the total portfolio. Shares reduced by 4.7%
4. NetEase Inc (NTES) - 1,200,333 shares, 1.88% of the total portfolio. Shares added by 24.34%
5. BWX Technologies Inc (BWXT) - 7,772,185 shares, 1.85% of the total portfolio. Shares added by 5.63%

William Blair Investment Management, Llc initiated holding in Masimo Corp. The purchase prices were between $148.38 and $186.78, with an estimated average price of $171.46. The stock is now traded at around $237.14. The impact to a portfolio due to this purchase was 0.69%. The holding were 804,330 shares as of .

William Blair Investment Management, Llc initiated holding in SolarEdge Technologies Inc. The purchase prices were between $69.48 and $142.2, with an estimated average price of $105.66. The stock is now traded at around $118.32. The impact to a portfolio due to this purchase was 0.57%. The holding were 1,432,686 shares as of .

William Blair Investment Management, Llc initiated holding in Domino's Pizza Inc. The purchase prices were between $270.75 and $373.16, with an estimated average price of $307.65. The stock is now traded at around $369.11. The impact to a portfolio due to this purchase was 0.49%. The holding were 311,879 shares as of .

William Blair Investment Management, Llc initiated holding in Coupa Software Inc. The purchase prices were between $109.57 and $173.64, with an estimated average price of $155.01. The stock is now traded at around $193.89. The impact to a portfolio due to this purchase was 0.44%. The holding were 641,445 shares as of .

William Blair Investment Management, Llc initiated holding in Brooks Automation Inc. The purchase prices were between $22.69 and $44.14, with an estimated average price of $36.67. The stock is now traded at around $39.19. The impact to a portfolio due to this purchase was 0.4%. The holding were 2,661,731 shares as of .

William Blair Investment Management, Llc initiated holding in Lincoln Electric Holdings Inc. The purchase prices were between $59.99 and $98.16, with an estimated average price of $86.15. The stock is now traded at around $78.69. The impact to a portfolio due to this purchase was 0.39%. The holding were 1,173,249 shares as of .

William Blair Investment Management, Llc added to a holding in TAL Education Group by 198.65%. The purchase prices were between $46.68 and $59.47, with an estimated average price of $53.79. The stock is now traded at around $54.80. The impact to a portfolio due to this purchase was 1.08%. The holding were 6,268,554 shares as of .

William Blair Investment Management, Llc added to a holding in Mercury Systems Inc by 715.14%. The purchase prices were between $57.1 and $86.47, with an estimated average price of $75.82. The stock is now traded at around $90.65. The impact to a portfolio due to this purchase was 0.66%. The holding were 2,150,709 shares as of .

William Blair Investment Management, Llc added to a holding in Grand Canyon Education Inc by 42.78%. The purchase prices were between $59.33 and $97.61, with an estimated average price of $82.82. The stock is now traded at around $92.41. The impact to a portfolio due to this purchase was 0.46%. The holding were 4,093,884 shares as of .

William Blair Investment Management, Llc added to a holding in The Brink's Co by 68.59%. The purchase prices were between $41.8 and $96.35, with an estimated average price of $78.68. The stock is now traded at around $41.06. The impact to a portfolio due to this purchase was 0.4%. The holding were 3,887,833 shares as of .

William Blair Investment Management, Llc added to a holding in Copart Inc by 54.30%. The purchase prices were between $58.78 and $104.5, with an estimated average price of $89.38. The stock is now traded at around $83.79. The impact to a portfolio due to this purchase was 0.39%. The holding were 3,360,955 shares as of .

William Blair Investment Management, Llc added to a holding in NetEase Inc by 24.34%. The purchase prices were between $270.43 and $356.78, with an estimated average price of $329.24. The stock is now traded at around $359.77. The impact to a portfolio due to this purchase was 0.37%. The holding were 1,200,333 shares as of .

William Blair Investment Management, Llc sold out a holding in Vail Resorts Inc. The sale prices were between $141.79 and $254.78, with an estimated average price of $216.65.

William Blair Investment Management, Llc sold out a holding in The Toronto-Dominion Bank. The sale prices were between $33.83 and $57.31, with an estimated average price of $51.54.

William Blair Investment Management, Llc sold out a holding in Sabre Corp. The sale prices were between $3.31 and $23.12, with an estimated average price of $16.99.

William Blair Investment Management, Llc sold out a holding in SiteOne Landscape Supply Inc. The sale prices were between $57.19 and $117.19, with an estimated average price of $91.73.

William Blair Investment Management, Llc sold out a holding in World Wrestling Entertainment Inc. The sale prices were between $30.44 and $66.4, with an estimated average price of $48.87.

William Blair Investment Management, Llc sold out a holding in Glaukos Corp. The sale prices were between $25.53 and $70.14, with an estimated average price of $51.69.