13F Filings History of MACKAY SHIELDS LLC
- Latest 13F filing
- Q2 2026 - 28 Jul 2026
- Latest reported 13F value
- $2,985,036,018
- Form 13F summary
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- MACKAY SHIELDS LLC Form 13F history summarizes parsed U.S.-listed equity disclosures for this manager.
- Form 13F is generally due within 45 days after each calendar quarter ends.
- MACKAY SHIELDS LLC reported 108 equity holdings with a total reported market value of $2,985,036,018 for Q2 2026. Top reported holdings included WESTERN DIGITAL CORP, GOOGM, MKS INC., LUMENTUM HLDGS INC, and LANTHEUS HLDGS INC.
- Largest 13F holdings
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WESTERN DIGITAL CORP GOOGM MKS INC. LUMENTUM HLDGS INC LANTHEUS HLDGS INC HPEPRC CABLE ONE INC QXOPRB BAPRA TETRA TECH INC NEW UBER TECHNOLOGIES INC SNOWFLAKE INC
+8 more
CHEFS WHSE INC ETSY INC NEEPRS PG&E CORP MCHPP BTT INTEGER HLDGS CORP APOPRA - Manager signature
- Chris Fitzgerald - Chief Compliance Officer
- Manager location
- New York, NY
13F snapshot
Latest parsed holdings, value, and filing-period context.
2 signals
Manager
Names, identifiers, and filing context for this profile.
2 identity fields
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Holdings Value
Form 13F evidence
Quarterly portfolio filings
SEC-reported 13F quarters for this filer, ordered by the latest accepted filing.
Latest quarter
Q2 2026
Latest value
$2,985,036,018
Quarter delta
+$257,475,552
Accepted
28 Jul 2026, 13:40
Rows shown
1-25 of 51
| Quarter | Holdings | SEC-reported value | Bought | Sold | Net | Top Holdings | Form Type | Accepted by SEC |
|---|---|---|---|---|---|---|---|---|
| Q2 2026 | 108 | $2,985,036,018 | +$474,023,938 | -$633,295,076 | -$159,271,138 | WESTERN DIGITAL CORP, GOOGM, MKS INC., LUMENTUM HLDGS INC, LANTHEUS HLDGS INC | 13F-HR | 28 Jul 2026, 13:40 |
| Q1 2026 | 111 | $2,727,560,466 | +$229,786,049 | -$526,500,548 | -$296,714,499 | LUMENTUM HLDGS INC, WESTERN DIGITAL CORP, ADVANCED ENERGY INDS, MIRUM PHARMACEUTICALS INC, QXOPRB | 13F-HR | 24 Apr 2026, 17:38 |
| Q4 2025 | 132 | $2,857,443,441 | +$218,914,340 | -$422,797,676 | -$203,883,336 | 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 | +$268,205,890 | -$583,899,319 | -$315,693,429 | 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 | +$404,921,676 | -$490,599,169 | -$85,677,493 | 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 | +$274,930,075 | -$519,285,640 | -$244,355,565 | 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 | +$319,648,077 | -$532,689,013 | -$213,040,936 | 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 | +$468,055,930 | -$253,783,563 | +$214,272,367 | 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 | +$456,531,172 | -$747,106,759 | -$290,575,587 | 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 | +$436,982,562 | -$369,990,042 | +$66,992,520 | GPOR, NICE LTD, PIONEER NAT RES CO, NRG ENERGY INC, MICROCHIP TECHNOLOGY INC. | 13F-HR | 02 May 2024, 21:18 |
| Q4 2023 | 139 | $3,406,550,897 | +$281,211,692 | -$478,169,352 | -$196,957,660 | GPOR, NICE LTD, PIONEER NAT RES CO, DISH NETWORK CORPORATION, MICROCHIP TECHNOLOGY INC. | 13F-HR | 02 Feb 2024, 13:31 |
| Q3 2023 | 157 | $3,515,717,069 | +$368,053,868 | -$430,282,350 | -$62,228,482 | GPOR, HELIX ENERGY SOLUTIONS GRP I, EQT CORP, NICE LTD, DISH NETWORK CORPORATION | 13F-HR | 24 Oct 2023, 21:29 |
| Q2 2023 | 147 | $3,576,995,312 | +$212,965,157 | -$406,769,668 | -$193,804,511 | 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 | +$348,591,008 | -$667,647,995 | -$319,056,987 | GPOR, DHRPRB, NICE LTD, MICROCHIP TECHNOLOGY INC., EQT CORP | 13F-HR | 27 Apr 2023, 13:55 |
| Q4 2022 | 241 | $3,919,396,919 | +$101,422,215 | -$261,791,878 | -$160,369,663 | GPOR, PIONEER NAT RES CO, EQT CORP, DHRPRB, ELEVANCE HEALTH INC | 13F-HR | 30 Jan 2023, 20:04 |
| Q3 2022 | 242 | $3,954,984,000 | +$122,988,525 | -$261,847,793 | -$138,859,268 | GPOR, EQT CORP, PIONEER NAT RES CO, DHRPRB, NICE LTD | 13F-HR | 01 Nov 2022, 19:56 |
| Q2 2022 | 247 | $4,121,846,000 | +$154,223,188 | -$6,781,300,565 | -$6,627,077,377 | GPOR, PIONEER NAT RES CO, EQT CORP, DHRPRB, NICE LTD | 13F-HR | 03 Aug 2022, 10:45 |
| Q1 2022 | 731 | $11,378,459,000 | +$496,643,648 | -$710,685,328 | -$214,041,680 | SPY, VOO, AAPL, MSFT, AMZN | 13F-HR | 12 May 2022, 21:14 |
| Q4 2021 | 717 | $12,041,352,000 | +$1,086,843,707 | -$400,072,110 | +$686,771,597 | SPY, VOO, AAPL, MSFT, AMZN | 13F-HR | 03 Feb 2022, 21:43 |
| Q3 2021 | 712 | $10,598,593,000 | +$794,984,851 | -$721,900,738 | +$73,084,113 | SPY, VOO, AAPL, MSFT, AMZN | Restatement | 14 Jan 2022, 20:01 |
| Q2 2021 | 708 | $10,642,754,000 | +$1,093,067,643 | -$5,120,025,434 | -$4,026,957,791 | SPY, VOO, AAPL, MSFT, AMZN | 13F-HR | 13 Aug 2021, 16:46 |
| Q1 2021 | 1,498 | $13,717,283,000 | +$1,435,057,927 | -$3,124,470,634 | -$1,689,412,707 | VOO, SPY, AAPL, MSFT, AMZN | 13F-HR | 14 May 2021, 10:29 |
| Q4 2020 | 1,491 | $14,507,054,000 | +$1,222,795,604 | -$2,237,822,109 | -$1,015,026,505 | SPY, AAPL, MSFT, AMZN, VOO | 13F-HR | 16 Feb 2021, 13:28 |
| Q3 2020 | 1,417 | $13,741,059,000 | +$2,134,069,500 | -$1,457,055,183 | +$677,014,317 | SPY, AAPL, MSFT, AMZN, VOO | 13F-HR | 03 Nov 2020, 21:19 |
| Q2 2020 | 1,454 | $12,539,165,000 | +$1,422,099,029 | -$1,999,291,190 | -$577,192,161 | SPY, MSFT, AAPL, AMZN, VOO | 13F-HR | 30 Jul 2020, 21:37 |