FundWatcher
WBSNX
William Blair Small Cap Growth Fund
WILLIAM BLAIR FUNDS

Portfolio moves

Net position changes between two of this fund's N-PORT snapshots. These are differences between point-in-time reports — not a trade log — and share counts can be affected by splits and other corporate actions.

Dec 31, 2025 → Mar 31, 2026

Expand a category to see the positions behind it, ranked by weight.

Security Shares Dec 2025 Shares Mar 2026 Δ shares End % Δ value
FIXED INC CLEARING CORP.REPO 0 36,964,691 36,964,691 3.73% $36.96M
NATIONAL-CL A 0 362,130 362,130 1.43% $14.18M
POWER INTEGRATIONS INC 0 195,985 195,985 1.01% $10.03M
ISHARES RUSSELL 2000 GROWTH MUTUAL FUND 0 31,550 31,550 1.00% $9.90M
TEREX CORP 0 162,420 162,420 0.97% $9.60M
SYNAPTICS INC 0 132,710 132,710 0.94% $9.30M
LITTELFUSE INC 0 23,770 23,770 0.81% $8.07M
CYTOKINETICS INC 0 120,490 120,490 0.80% $7.94M
KNIGHT-SWIFT TRANSPORTATION HOLDINGS INC 0 130,850 130,850 0.76% $7.53M
BORGWARNER INC 0 118,068 118,068 0.65% $6.41M
WINGSTOP INC 0 30,040 30,040 0.47% $4.66M
Security Shares Dec 2025 Shares Mar 2026 Δ shares End % Δ value
CECO ENVIRONMNTL 237,230 0 -237,230 0.00% -$14.20M
FIXED INC CLEARING CORP.REPO 14,171,610 0 -14,171,610 0.00% -$14.17M
CADENCE BANK 306,230 0 -306,230 0.00% -$13.12M
WESTERN ALLIANCE BANCORP 143,455 0 -143,455 0.00% -$12.06M
CLEARWATER ANALYTICS HOLDINGS INC 413,341 0 -413,341 0.00% -$9.97M
RAMBUS INC 106,460 0 -106,460 0.00% -$9.78M
WAYSTAR HOLDING CORP 287,537 0 -287,537 0.00% -$9.42M
VITAL FARMS INC 230,939 0 -230,939 0.00% -$7.38M
WINMARK CORP 17,419 0 -17,419 0.00% -$7.05M
TREACE MEDICAL CONCEPTS INC 439,781 0 -439,781 0.00% -$1.08M
Security Shares Dec 2025 Shares Mar 2026 Δ shares End % Δ value
DIEBOLD NIXDORF INC 299,130 323,310 24,180 2.46% $4.08M
BALCHEM CORP 100,540 108,940 8,400 1.86% $3.04M
MAREX GROUP PLC 326,600 385,570 58,970 1.73% $4.66M
GARRETT MOTION INC 758,669 878,759 120,090 1.61% $2.74M
REGAL REXNORD CORP 71,090 84,510 13,420 1.59% $5.85M
GLOBUS MEDICAL INC 172,533 180,603 8,070 1.57% $496.90K
FLOWSERVE CORP 181,700 209,950 28,250 1.56% $2.83M
PRIMO BRANDS CORP A 757,030 817,030 60,000 1.55% $3.01M
GRAND CANYON EDUCATION INC 77,081 89,661 12,580 1.54% $2.43M
NEXTRACKER INC CL A 116,310 125,440 9,130 1.52% $4.99M
KRYSTAL BIOTECH INC 54,540 55,790 1,250 1.45% $965.38K
ALIGNMENT HEALTHCARE INC 775,198 811,848 36,650 1.44% -$1.01M
MADRIGAL PHARMACEUTICALS INC 26,288 26,758 470 1.41% -$1.30M
FIRSTSERVICE-WI 90,457 97,817 7,360 1.37% -$478.08K
US LIME & MINERA 96,145 103,525 7,380 1.36% $2.01M
ESTABLISHMENT LABS HOLDINGS INC 227,340 237,980 10,640 1.36% -$3.06M
WEATHERFORD INTERNATIONAL PLC 119,600 140,960 21,360 1.34% $3.97M
VERICEL CORP 401,814 410,954 9,140 1.33% -$1.25M
BWX TECHNOLOGIES INC 57,334 61,894 4,560 1.28% $2.75M
MERIT MEDICAL SYSTEMS INC 161,000 183,210 22,210 1.27% -$1.56M
STERLING INFRASTRUCTURE INC 13,800 30,040 16,240 1.23% $8.01M
BRP GROUP INC-A 496,501 536,471 39,970 1.19% -$160.75K
BKV CORPORATION 372,960 402,770 29,810 1.16% $1.36M
VERACYTE INC 265,613 342,133 76,520 1.11% -$162.20K
GLAUKOS CORP 97,910 102,340 4,430 1.11% -$37.09K
HALOZYME THERAPEUTICS INC 113,690 167,040 53,350 1.09% $3.14M
MIRUM PHARMACEUTICALS INC 113,223 115,733 2,510 1.08% $1.75M
QUAKER HOUGHTON 78,987 85,297 6,310 1.07% -$249.26K
NATIONAL VISION HOLDINGS INC 335,476 405,706 70,230 1.06% $1.85M
PERELLA WEINBERG PARTNERS 500,515 577,795 77,280 1.06% $1.83M
APPFOLIO INC - A 55,530 66,350 10,820 1.06% -$2.45M
JEFFERSON CAPITAL INC 499,067 539,047 39,980 1.04% -$783.28K
OSI SYSTEMS INC 32,530 38,950 6,420 1.04% $2.04M
ESAB CORP 69,000 104,320 35,320 1.02% $2.37M
AGILYSYS INC 101,530 137,660 36,130 0.99% -$2.27M
US PHYSICAL THERAPY INC 124,662 130,522 5,860 0.99% $49.07K
LATTICE SEMICONDUCTOR CORP 97,910 102,340 4,430 0.96% $2.29M
HEALTHEQUITY INC 107,110 112,240 5,130 0.95% -$432.45K
I3 VERTICALS INC CL A 99,175 406,700 307,525 0.92% $6.60M
FRESHPET INC 142,060 152,180 10,120 0.90% $316.82K
DONNELLEY FINANCIAL SOLUTIONS INC 174,470 188,490 14,020 0.90% $739.41K
HAWKINS INC 45,340 57,110 11,770 0.88% $2.33M
ZETA GLOBAL HOLDINGS CORP 510,270 550,960 40,690 0.88% -$1.61M
GRAHAM CORPORATION 100,210 108,610 8,400 0.86% $2.14M
PLANET FITNESS INC CL A 92,990 112,570 19,580 0.84% -$1.71M
REVOLVE GROUP INC 336,027 362,697 26,670 0.83% -$1.94M
IMPINJ INC 71,300 75,600 4,300 0.78% -$4.64M
AMPRIUS TECHNOLOGIES INC 331,200 404,390 73,190 0.69% $4.20M
DOXIMITY INC-A 283,890 292,150 8,260 0.69% -$5.76M
SIMPLY GOOD FOODS CO 428,130 462,160 34,030 0.67% -$1.96M
AEHR TEST SYSTEMS 166,683 177,373 10,690 0.66% $3.21M
INSPIRE MEDICAL SYSTEMS INC 116,968 122,468 5,500 0.64% -$4.47M
Americold Realty Trust Inc 499,100 539,080 39,980 0.62% -$240.57K
TECNOGLASS INC 106,689 137,889 31,200 0.62% $774.36K
PENGUIN SOLUTIONS INC 314,110 333,740 19,630 0.59% -$270.17K
VERTEX INC - CLASS A 409,070 442,020 32,950 0.53% -$2.91M
PAYMENTUS HOLDINGS INC CL A 171,846 185,856 14,010 0.48% -$707.87K
GENEDX HOLDINGS CORP-A 59,275 61,865 2,590 0.40% -$3.74M
PROCEPT BIOROBOTICS CORP 139,970 146,570 6,600 0.37% -$737.74K
QUANTERIX CORP 687,176 719,776 32,600 0.26% -$1.84M
Security Shares Dec 2025 Shares Mar 2026 Δ shares End % Δ value
TWIST BIOSCIENCE CORP 526,304 449,874 -76,430 2.15% $4.68M
COGNEX CORP 354,530 351,240 -3,290 1.73% $4.45M
RUSH STREET INTERACTIVE INC 795,800 736,150 -59,650 1.61% $548.87K
BLOOM ENERGY CORP CL A 120,590 112,900 -7,690 1.54% $4.82M
OLD NATL BANCORP 699,530 680,690 -18,840 1.52% -$563.27K
PDF SOLUTIONS INC 401,876 386,599 -15,277 1.27% $1.18M
SKYLINE CHAMPION CORP 191,029 167,169 -23,860 1.25% -$3.71M
BRINK'S CO/THE 161,819 114,634 -47,185 1.20% -$7.01M
NOVANTA INC 119,270 95,070 -24,200 1.13% -$2.96M
MODINE MFG CO 73,600 45,560 -28,040 0.99% $46.97K
HELIOS TECHNOLOGIES INC 197,140 146,240 -50,900 0.95% -$1.08M
STEPSTONE GROUP INC CLASS A 225,369 191,759 -33,610 0.92% -$5.31M
HAMMOND POWER SOLUTIONS INC COMMON STOCK 95,745 72,755 -22,990 0.91% -$1.99M
MERCURY SYSTEMS INC 204,568 113,098 -91,470 0.83% -$6.69M
ONTO INNOVATION INC 89,370 36,640 -52,730 0.76% -$6.59M
ARGAN INC 21,360 13,340 -8,020 0.73% $573.12K
CASELLA WASTE SYS INC CL A 108,098 89,189 -18,909 0.71% -$3.51M
LUMENTUM HOLDINGS INC 46,990 9,200 -37,790 0.65% -$10.85M
ONEMAIN HOLDINGS INC 147,860 93,750 -54,110 0.51% -$4.97M
Q2 HOLDINGS INC 195,170 104,184 -90,986 0.50% -$9.16M
ACV AUCTIONS INC CL A 1,090,400 1,007,304 -83,096 0.43% -$4.47M
VERRA MOBILITY CORP 507,449 229,615 -277,834 0.33% -$8.09M
Security Shares Dec 2025 Shares Mar 2026 Δ shares End % Δ value
OMNIAB INC - 12.5 EARNOUT 23,037 23,037 0 0.00% $0
OMNIAB INC - 15.00 EARNOUT 23,037 23,037 0 0.00% $0

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