13F Filings History of MACKAY SHIELDS LLC

Latest 13F report
Q4 2025 - 29 Jan 2026
Value $
$2,857,443,441
Signature - Title
Chris Fitzgerald - Chief Compliance Officer
Location
New York, NY
Summary
This page shows a list of all the recent 13F filings made by MACKAY SHIELDS LLC. Form 13F is required to be filed within 45 days of the end of a calendar quarter. MACKAY SHIELDS LLC reported 132 stock holdings with total value $2,857,443,441 as of Q4 2025. Top holdings included WESTERN DIGITAL CORP, LUMENTUM HLDGS INC, ADVANCED ENERGY INDS, MIRUM PHARMACEUTICALS INC, and LANTHEUS HLDGS INC.

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Holdings Value
Quarter Holdings Value $ Bought Sold Net Top Holdings Form Type Filing Time
Q4 2025 132 $2,857,443,441 +$218,914,417 -$422,796,508 -$203,882,091 WESTERN DIGITAL CORP, LUMENTUM HLDGS INC, ADVANCED ENERGY INDS, MIRUM PHARMACEUTICALS INC, LANTHEUS HLDGS INC 13F-HR 28 Jan 2026, 21:47
Q3 2025 136 $2,939,899,446 +$268,203,131 -$583,898,717 -$315,695,586 SEAGATE HDD CAYMAN, QXOPRB, TETRA TECH INC NEW, UBER TECHNOLOGIES INC, MIRUM PHARMACEUTICALS INC 13F-HR 27 Oct 2025, 13:33
Q2 2025 145 $3,122,192,222 +$404,920,493 -$490,595,142 -$85,674,649 TETRA TECH INC NEW, LANTHEUS HLDGS INC, POST HLDGS INC, UBER TECHNOLOGIES INC, PG&E CORP 13F-HR 24 Jul 2025, 15:23
Q1 2025 144 $3,088,193,065 +$274,932,524 -$519,286,153 -$244,353,629 LANTHEUS HLDGS INC, NRG ENERGY INC, POST HLDGS INC, TETRA TECH INC NEW, PG&E CORP 13F-HR 28 Apr 2025, 17:57
Q4 2024 147 $3,392,524,740 +$319,644,539 -$532,687,512 -$213,042,973 TETRA TECH INC NEW, LANTHEUS HLDGS INC, NRG ENERGY INC, POST HLDGS INC, INTEGER HLDGS CORP 13F-HR 03 Feb 2025, 21:49
Q3 2024 144 $3,648,971,986 +$468,056,810 -$253,778,592 +$214,278,218 LANTHEUS HLDGS INC, TETRA TECH INC NEW, TRANSMEDICS GROUP INC, MICROCHIP TECHNOLOGY INC., NRG ENERGY INC 13F-HR 31 Oct 2024, 10:42
Q2 2024 139 $3,289,725,522 +$456,532,820 -$747,112,283 -$290,579,463 TRANSMEDICS GROUP INC, PALO ALTO NETWORKS INC, NICE LTD, MICROCHIP TECHNOLOGY INC., LANTHEUS HLDGS INC 13F-HR 07 Aug 2024, 19:41
Q1 2024 140 $3,607,878,455 +$436,982,730 -$369,983,043 +$66,999,687 GPOR, NICE LTD, PIONEER NAT RES CO, NRG ENERGY INC, MICROCHIP TECHNOLOGY INC. 13F-HR 02 May 2024, 21:18
Q4 2023 139 $3,427,500,182 $0 GPOR, NICE LTD, PIONEER NAT RES CO, DISH NETWORK CORPORATION, MICROCHIP TECHNOLOGY INC. 13F-HR 02 Feb 2024, 13:31
Q3 2023 127 $3,264,002,848 $0 HELIX ENERGY SOLUTIONS GRP I, EQT CORP, PIONEER NAT RES CO, NICE LTD, DISH NETWORK CORPORATION 13F-HR 24 Oct 2023, 21:29
Q2 2023 147 $3,576,995,312 +$212,964,097 -$138,239,323 +$74,724,774 GPOR, NICE LTD, EQT CORP, MICROCHIP TECHNOLOGY INC., PIONEER NAT RES CO 13F-HR 26 Jul 2023, 20:45
Q1 2023 154 $3,642,045,402 +$348,595,321 -$289,655,829 +$58,939,492 GPOR, DHRPRB, NICE LTD, MICROCHIP TECHNOLOGY INC., EQT CORP 13F-HR 27 Apr 2023, 13:55
Q4 2022 241 $3,919,396,919 +$101,422,129 -$162,969,936 -$61,547,807 GPOR, PIONEER NAT RES CO, EQT CORP, DHRPRB, ELEVANCE HEALTH INC 13F-HR 30 Jan 2023, 19:04
Q3 2022 240 $3,918,647,000 +$122,988,357 -$50,696,353 +$72,292,004 GPOR, EQT CORP, PIONEER NAT RES CO, DHRPRB, NICE LTD 13F-HR 01 Nov 2022, 19:56
Q2 2022 244 $4,121,850,000 +$154,226,479 -$114,395,514 +$39,830,965 GPOR, PIONEER NAT RES CO, EQT CORP, DHRPRB, NICE LTD 13F-HR 03 Aug 2022, 10:45
Q1 2022 731 $11,378,459,000 +$496,642,971 -$465,098,980 +$31,543,991 SPY, VOO, AAPL, MSFT, AMZN 13F-HR 12 May 2022, 21:14
Q4 2021 717 $12,041,352,000 +$1,084,625,723 -$369,388,774 +$715,236,949 SPY, VOO, AAPL, MSFT, AMZN 13F-HR 03 Feb 2022, 20:43
Q3 2021 708 $9,826,648,000 +$794,983,620 -$715,769,112 +$79,214,508 VOO, AAPL, MSFT, AMZN, GPOR Restatement 14 Jan 2022, 20:01
Q2 2021 708 $10,643,074,000 +$1,093,064,540 -$5,120,025,110 -$4,026,960,570 SPY, VOO, AAPL, MSFT, AMZN 13F-HR 13 Aug 2021, 16:46
Q1 2021 1,496 $13,711,448,000 +$1,434,569,049 -$3,120,843,567 -$1,686,274,518 VOO, SPY, AAPL, MSFT, AMZN 13F-HR 14 May 2021, 10:29
Q4 2020 1,485 $14,501,310,000 +$1,204,874,429 -$1,596,411,786 -$391,537,357 SPY, AAPL, MSFT, AMZN, VOO 13F-HR 16 Feb 2021, 12:28
Q3 2020 1,407 $13,106,824,000 +$2,132,790,776 -$979,745,253 +$1,153,045,523 AAPL, MSFT, AMZN, VOO, META 13F-HR 03 Nov 2020, 20:19
Q2 2020 1,448 $12,530,116,000 +$1,424,703,064 -$1,678,089,909 -$253,386,845 SPY, MSFT, AAPL, AMZN, VOO 13F-HR 30 Jul 2020, 21:37
Q1 2020 1,383 $10,812,435,000 +$1,152,307,571 -$1,460,738,124 -$308,430,553 SPY, MSFT, AAPL, AMZN, VOO 13F-HR 07 May 2020, 17:55
Q4 2019 1,342 $14,504,407,592 +$1,375,388,471 -$4,019,582,544 -$2,644,194,073 SPY, VOO, AAPL, MSFT, AMZN 13F-HR 10 Feb 2020, 16:36
Q3 2019 1,385 $16,365,446,164 +$3,791,942,372 -$1,527,428,009 +$2,264,514,363 SPY, VOO, MSFT, AAPL, AMZN 13F-HR 01 Nov 2019, 17:11
Q2 2019 1,397 $14,650,229,000 +$2,260,333,197 -$1,455,346,370 +$804,986,827 SPY, VOO, MSFT, AAPL, AMZN 13F-HR 13 Aug 2019, 10:24
Q1 2019 1,370 $12,646,332,460 +$1,228,889,765 -$1,072,037,430 +$156,852,335 MSFT, AAPL, AMZN, META, GOOG Restatement 15 May 2019, 11:07
Q4 2018 1,367 $12,324,677,000 +$3,000,904,457 -$1,473,853,987 +$1,527,050,470 SPY, VOO, MSFT, AAPL, AMZN 13F-HR 14 Feb 2019, 10:10
Q3 2018 1,095 $13,097,104,000 +$1,383,242,494 -$1,342,419,772 +$40,822,722 SPY, VOO, MSFT, META, GOOGL 13F-HR 14 Nov 2018, 10:13
Q2 2018 1,191 $14,439,998,000 +$1,773,467,900 -$2,265,391,868 -$491,923,968 SPY, VOO, AAPL, MSFT, AMZN 13F-HR 06 Aug 2018, 16:54
Q1 2018 1,247 $16,024,508,488 +$13,704,830,331 -$170,027,295 +$13,534,803,036 HFXI, SPY, VOO, AAPL, MSFT 13F-HR 03 May 2018, 11:07
Q4 2017 162 $2,732,585,118 +$253,705,122 -$124,642,548 +$129,062,574 SGY, DISH NETWORK CORP, DANAHER CORP DEL, AIR LEASE CORP, MICROCHIP TECHNOLOGY INC 13F-HR 24 Jan 2018, 08:39
Q3 2017 159 $2,688,168,000 +$421,122,933 -$36,480,531 +$384,642,402 DISH NETWORK CORP, SGY, DANAHER CORP DEL, MICROCHIP TECHNOLOGY INC, WEATHERFORD INTL LTD 13F-HR 24 Oct 2017, 14:16
Q2 2017 128 $2,363,665,000 +$382,795,604 -$59,710,754 +$323,084,850 SGY, DANAHER CORP DEL, AMERICAN RLTY CAP PPTYS INC, XPO LOGISTICS INC, MACQUARIE INFRASTRUCTURE COR 13F-HR 13 Jul 2017, 10:50
Q1 2017 112 $2,177,439,000 +$159,055,564 -$87,678,046 +$71,377,518 SGY, AMERICAN RLTY CAP PPTYS INC, DANAHER CORP DEL, TELEFLEX INC, XILINX INC 13F-HR 20 Apr 2017, 10:13
Q4 2016 118 $2,096,102,000 +$171,843,368 -$141,172,467 +$30,670,901 AMERICAN RLTY CAP PPTYS INC, XILINX INC, DANAHER CORP DEL, MACQUARIE INFRASTRUCTURE COR, TELEFLEX INC 13F-HR 10 Jan 2017, 16:11
Q3 2016 115 $2,206,614,872 +$310,506,195 -$20,269,419 +$290,236,776 AMERICAN RLTY CAP PPTYS INC, TELEFLEX INC, DANAHER CORP DEL, XILINX INC, MACQUARIE INFRASTRUCTURE COR 13F-HR 20 Oct 2016, 08:43
Q2 2016 113 $1,996,747,000 +$352,268,314 -$54,663,340 +$297,604,974 EXIDE TECHNOLOGIES, TELEFLEX INC, AMERICAN RLTY CAP PPTYS INC, DANAHER CORP DEL, MACQUARIE INFRASTRUCTURE COR 13F-HR 25 Jul 2016, 07:00
Q1 2016 110 $1,820,868,918 +$196,200,139 -$67,847,391 +$128,352,748 EXIDE TECHNOLOGIES, JARDEN CORP, TELEFLEX INC, DANAHER CORP DEL, XILINX INC 13F-HR 20 Apr 2016, 21:21
Q4 2015 115 $1,816,699,082 +$186,539,425 -$204,528,946 -$17,989,521 JARDEN CORP, DANAHER CORP DEL, TELEFLEX INC, XILINX INC, AIR LEASE CORP 13F-HR 19 Jan 2016, 08:07
Q3 2015 128 $1,892,891,353 +$264,483,959 -$62,014,827 +$202,469,132 DANAHER CORP DEL, TEVA PHARMACEUTICAL FIN LLC, JARDEN CORP, TELEFLEX INC, XILINX INC 13F-HR 22 Oct 2015, 08:57
Q2 2015 128 $1,927,925,857 +$303,612,980 -$150,921,594 +$152,691,386 DANAHER CORP DEL, GILEAD SCIENCES INC, TELEFLEX INC, TEVA PHARMACEUTICAL FIN LLC, MACQUARIE INFRASTRUCTURE COR 13F-HR 31 Jul 2015, 20:27
Q1 2015 130 $1,868,156,939 +$308,540,292 -$284,623,841 +$23,916,451 DANAHER CORP DEL, TEVA PHARMACEUTICAL FIN LLC, XILINX INC, GILEAD SCIENCES INC, TELEFLEX INC 13F-HR 04 May 2015, 21:38
Q4 2014 131 $1,940,841,000 +$258,867,154 -$31,591,323 +$227,275,831 INTEL CORP, GILEAD SCIENCES INC, DANAHER CORP DEL, CONTINENTAL AIRLS INC, XILINX INC 13F-HR 29 Jan 2015, 06:44
Q3 2014 135 $1,932,505,000 +$386,364,393 -$169,400,464 +$216,963,929 GILEAD SCIENCES INC, INTEL CORP, DANAHER CORP DEL, TEVA PHARMACEUTICAL FIN LLC, NOVELLUS SYS INC 13F-HR 24 Oct 2014, 12:38
Q2 2014 115 $1,814,587,000 +$312,331,351 -$154,904,783 +$157,426,568 GILEAD SCIENCES INC, INTEL CORP, DANAHER CORP DEL, SALIX PHARMACEUTICALS INC, TEVA PHARMACEUTICAL FIN LLC 13F-HR 22 Jul 2014, 16:42
Q1 2014 133 $1,984,403,000 +$216,737,322 -$81,532,815 +$135,204,507 GILEAD SCIENCES INC, DANAHER CORP DEL, UTXPRA, TEVA PHARMACEUTICAL FIN LLC, SALIX PHARMACEUTICALS INC 13F-HR 08 May 2014, 17:26
Q4 2013 673 $2,656,898,000 $0 GILEAD SCIENCES INC, DANAHER CORP DEL, SCHLUMBERGER, UTXPRA, GM 13F-HR 27 Jan 2014, 20:34