Mid Cap Growth Stock Portfolio
NORTHWESTERN MUTUAL SERIES FUND INC

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
ROLLINS INC 0 148,656 148,656 0.83% $7.94M
MKS INSTRUMENTS INC 0 27,724 27,724 0.67% $6.37M
BANK OF NEW YORK MELLON CORP 0 48,455 48,455 0.60% $5.75M
PALO ALTO NETWORKS INC 0 34,356 34,356 0.58% $5.51M
TEXAS ROADHOUSE INC 0 32,765 32,765 0.57% $5.41M
PROCORE TECHNOLOGIES INC 0 94,531 94,531 0.56% $5.39M
PACCAR INC 0 41,863 41,863 0.51% $4.84M
EQUITY LIFESTYLE PPTYS INC 0 73,115 73,115 0.48% $4.56M
EXPEDIA INC 0 14,417 14,417 0.35% $3.33M
FIGURE TECHNOLOGY SOLUTIONS INC A 0 85,415 85,415 0.30% $2.90M
DIGITALOCEAN HOLDINGS INC 0 31,379 31,379 0.28% $2.69M
XENON PHARMACEUTICALS INC 0 35,906 35,906 0.22% $2.09M
BRIDGEBIO PHARMA INC 0 27,810 27,810 0.22% $2.07M
CONTRA CYBERARK SOFTWA 0 15,613 15,613 0.07% $702.58K
Security Shares Dec 2025 Shares Mar 2026 Δ shares End % Δ value
CYBER-ARK SOFTWARE LTD 15,718 0 -15,718 0.00% -$7.01M
EAGLE MATERIALS INC 27,543 0 -27,543 0.00% -$5.69M
TPG INC 86,471 0 -86,471 0.00% -$5.52M
COINBASE GLOBAL INC 23,331 0 -23,331 0.00% -$5.28M
CROWN CASTLE INC 54,590 0 -54,590 0.00% -$4.85M
NUTANIX INC CL A 79,770 0 -79,770 0.00% -$4.12M
TYLER TECHNOLOGIES INC 8,622 0 -8,622 0.00% -$3.91M
GARTNER INC 15,087 0 -15,087 0.00% -$3.81M
CREDO TECHNOLOGY GROUP HOLDING LTD 25,719 0 -25,719 0.00% -$3.70M
MONDAY.COM LTD 22,825 0 -22,825 0.00% -$3.37M
ULTRAGENYX PHARMA INC 134,758 0 -134,758 0.00% -$3.10M
ARCELLX INC 38,157 0 -38,157 0.00% -$2.49M
FIGMA INC-CL A 39,563 0 -39,563 0.00% -$1.48M
CORCEPT THERAPEUTICS INC 31,062 0 -31,062 0.00% -$1.08M
Security Shares Dec 2025 Shares Mar 2026 Δ shares End % Δ value
HOWMET AEROSPACE INC 125,398 144,513 19,115 3.49% $7.60M
VERTIV HOLDINGS CO 120,731 129,057 8,326 3.38% $12.78M
ROYAL CARIBBEAN CRUISES LTD 106,687 108,652 1,965 3.13% $141.72K
CENCORA INC 67,612 76,295 8,683 2.51% $1.13M
ALNYLAM PHARMACEUTICALS INC 55,989 59,550 3,561 2.06% -$2.56M
CHENIERE ENERGY INC 51,097 59,489 8,392 1.77% $6.95M
BURLINGTON STORES INC 44,134 46,796 2,662 1.59% $2.48M
NEUROCRINE BIOSCIENCES INC 91,105 101,844 10,739 1.40% $495.51K
MSCI INC 20,600 24,723 4,123 1.39% $1.51M
LIVE NATION ENTERTAINMENT INC 39,571 87,341 47,770 1.39% $7.68M
DATADOG INC CL A 90,407 112,473 22,066 1.39% $982.99K
VEEVA SYSTEMS-A 62,263 66,437 4,174 1.22% -$2.23M
IDEXX LABS INC 17,086 20,224 3,138 1.19% -$195.53K
PERFORMANCE FOOD GROUP CO 100,430 111,357 10,927 1.00% $508.18K
ON SEMICONDUCTOR CORP 33,460 151,126 117,666 0.98% $7.55M
TELEDYNE TECHNOLOGIES INC 13,505 15,112 1,607 0.96% $2.25M
AMETEK INC NEW 38,222 42,629 4,407 0.96% $1.29M
BWX TECHNOLOGIES INC 36,579 44,631 8,052 0.96% $2.80M
RAYMOND JAMES FINANCIAL INC. 54,009 62,642 8,633 0.95% $396.63K
AUTOZONE INC 2,379 2,629 250 0.93% $811.81K
FABRINET 14,553 16,271 1,718 0.89% $1.86M
DOORDASH INC-A 34,192 39,539 5,347 0.62% -$1.81M
VERALTO CORP 58,823 62,319 3,496 0.58% -$359.11K
LEVI STRAUSS and COMPANY CL A 187,377 287,329 99,952 0.56% $1.43M
INGERSOLL RAND INC 54,257 65,970 11,713 0.55% $987.28K
JFROG LTD 87,546 111,507 23,961 0.55% -$235.10K
WYNN RESORTS LTD 42,501 51,026 8,525 0.54% $67.54K
ESAB CORP 45,477 52,577 7,100 0.53% $1.40K
CHIPOTLE MEXICAN GRILL INC 101,109 149,393 48,284 0.50% $1.04M
THOR INDUSTRIES INC 50,066 57,838 7,772 0.48% -$519.60K
RHYTHM PHARMACEUTICALS INC 40,578 50,223 9,645 0.46% $24.43K
RUBRIK INC-A 45,148 63,653 18,505 0.33% -$335.83K
CARIS LIFE SCIENCES INC 84,522 142,881 58,359 0.27% $274.31K
Security Shares Dec 2025 Shares Mar 2026 Δ shares End % Δ value
HILTON WORLDWIDE HOLDINGS INC 110,242 108,303 -1,939 3.45% $1.27M
QUANTA SVCS INC 53,258 50,762 -2,496 2.92% $5.39M
COMFORT SYSTEMS USA INC 19,688 17,839 -1,849 2.57% $6.23M
INSMED INC 132,559 131,668 -891 2.25% -$1.54M
CLOUDFLARE INC-A 104,369 103,668 -701 2.24% $814.51K
CARVANA CO CL A 59,508 53,419 -6,089 1.76% -$8.32M
NATERA INC 72,266 71,780 -486 1.50% -$2.20M
VISTRA CORP 133,324 87,048 -46,276 1.37% -$8.42M
WILLIAMS COS INC 205,611 175,285 -30,326 1.34% $397.97K
HEICO CORP CL A 58,306 57,914 -392 1.28% -$2.49M
TAKE-TWO INTERACTV SOFTWR INC 60,592 60,185 -407 1.24% -$3.63M
FTAI AVIATION LTD 59,307 48,374 -10,933 1.24% $177.05K
MONOLITHIC POWER SYS INC 10,392 10,322 -70 1.18% $1.87M
CBRE GROUP INC - CL A 79,848 79,312 -536 1.12% -$2.10M
ITT INC 56,685 56,304 -381 1.12% $892.19K
TEMPUR SEALY INTERNATIONAL INC 144,635 144,189 -446 1.12% -$2.25M
CASEY'S GENERAL 17,877 14,217 -3,660 1.08% $467.19K
ULTA BEAUTY INC 21,142 19,388 -1,754 1.06% -$2.66M
ROBLOX CORP - A 184,075 178,107 -5,968 1.05% -$4.84M
CIENA CORP 44,270 25,307 -18,963 1.03% -$528.49K
DEXCOM INC 152,516 151,491 -1,025 1.00% -$608.85K
EOG RESOURCES INC 62,153 61,735 -418 0.93% $2.40M
TERADYNE INC 52,382 29,207 -23,175 0.91% -$1.48M
REDDIT INC-A 78,141 61,172 -16,969 0.86% -$9.73M
AXON ENTERPRISE INC 19,201 19,072 -129 0.85% -$2.81M
HUBSPOT INC 30,098 29,895 -203 0.76% -$4.78M
TWILIO INC CLASS A 56,571 56,191 -380 0.74% -$976.71K
TECHNIPFMC PLC 92,502 92,319 -183 0.67% $2.26M
ROBINHOOD MARKETS INC 105,553 90,653 -14,900 0.66% -$5.66M
ALKERMES PLC 178,149 176,952 -1,197 0.65% $1.27M
MONGODB INC CL A 29,156 25,248 -3,908 0.65% -$6.06M
ON HOLDING AG 204,793 178,490 -26,303 0.64% -$3.45M
ROCKET LAB CORP 174,553 93,779 -80,774 0.63% -$6.15M
ROCKET COS INC-A 419,707 407,712 -11,995 0.61% -$2.32M
IQVIA HOLDINGS INC 32,989 32,768 -221 0.58% -$1.85M
SNOWFLAKE INC CL A 36,534 36,288 -246 0.57% -$2.54M
LPL FINL HLDGS INC 25,501 17,658 -7,843 0.56% -$3.80M
NUVALENT INC-A 51,953 51,604 -349 0.55% $60.88K
TRANE TECHNOLOGIES PLC 15,485 12,520 -2,965 0.55% -$809.18K
IONIS PHARMACEUTICALS INC 69,304 68,528 -776 0.54% -$336.87K
CARLISLE COS INC 15,493 15,388 -105 0.54% $178.15K
GARMIN LTD 22,194 22,045 -149 0.54% $612.61K
AGILENT TECHNOLOGIES INC 43,339 43,047 -292 0.51% -$990.64K
OKTA INC CL A 60,941 60,531 -410 0.50% -$505.17K
TRADEWEB MARKETS INC A 59,173 38,716 -20,457 0.48% -$1.81M
ARTHUR J GALLAGHAR AND CO 25,272 20,910 -4,362 0.47% -$2.01M
RAMBUS INC 51,965 51,615 -350 0.46% -$334.63K
James Hardie Industries Public Limited Company 234,303 232,728 -1,575 0.46% -$453.92K
METTLER-TOLEDO INTL INC 3,317 3,295 -22 0.43% -$468.87K
PLANET FITNESS INC CL A 81,104 51,555 -29,549 0.40% -$4.96M
COUPANG INC A 200,825 200,206 -619 0.40% -$957.57K
PENUMBRA INC 29,569 11,294 -18,275 0.39% -$5.48M
BRIGHT HORIZONS FAMILY SOLUTIONS INC 43,281 42,990 -291 0.37% -$857.92K
INTERACTIVE BROKERS GROUP INC 75,373 46,008 -29,365 0.32% -$1.76M
FLUTTER ENTERTAINMENT PLC 85,197 23,561 -61,636 0.25% -$15.92M
IRHYTHM TECHNOLOGIES INC 19,166 19,037 -129 0.24% -$1.15M
WINGSTOP INC 14,444 14,347 -97 0.23% -$1.22M
DISC MEDICINE INC 32,988 32,767 -221 0.22% -$524.46K
ARES MANAGEMENT CORP CL A 95,341 16,354 -78,987 0.19% -$13.63M
AFFIRM HOLDINGS INC 55,755 31,945 -23,810 0.15% -$2.69M
UNIQURE N.V. 48,207 47,883 -324 0.08% -$370.71K
Security Shares Dec 2025 Shares Mar 2026 Δ shares End % Δ value
BROADRIDGE FINL 47,754 47,754 0 0.81% -$2.90M

Machine-readable: JSON · Markdown. Programmatic access via the agent surface.