Largest positions
| Issuer | Class | Value | Share |
|---|---|---|---|
| Western Digital Corp.NOTE 3.000%11/1 | NOTE 3.000%11/1 | $150,816,792 | 5.1% |
| Alphabet Inc.DEP SHS RP1/20 A | DEP SHS RP1/20 A | $122,643,950 | 4.1% |
| Mks Inc..NOTE 1.250% 6/0 | NOTE 1.250% 6/0 | $107,477,663 | 3.6% |
| Lumentum Hldgs Inc.NOTE 0.500% 6/1 | NOTE 0.500% 6/1 | $84,112,403 | 2.8% |
| Lantheus Hldgs Inc.NOTE 2.625%12/1 | NOTE 2.625%12/1 | $74,003,121 | 2.5% |
| Hewlett Packard Enterprise C7.625 MAND CONV | 7.625 MAND CONV | $70,210,944 | 2.4% |
| Cable One Inc.NOTE 1.125% 3/1 | NOTE 1.125% 3/1 | $58,775,896 | 2.0% |
| Qxo Inc.5.50 DEP PFD | 5.50 DEP PFD | $57,413,691 | 1.9% |
| Boeing CODEP CONV PFD A | DEP CONV PFD A | $56,171,414 | 1.9% |
| Tetra Tech Inc. NewDBCV 2.250% 8/1 | DBCV 2.250% 8/1 | $55,268,887 | 1.9% |
| Uber Technologies Inc.NOTE 0.875%12/0 | NOTE 0.875%12/0 | $54,331,944 | 1.8% |
| Snowflake Inc.NOTE 10/0 | NOTE 10/0 | $54,155,943 | 1.8% |
| Chefs Whse Inc.NOTE 2.375%12/1 | NOTE 2.375%12/1 | $53,041,671 | 1.8% |
| Etsy Inc.NOTE 0.125%10/0 | NOTE 0.125%10/0 | $50,886,574 | 1.7% |
| Nextera Energy Inc.UNIT 06/01/2027 | UNIT 06/01/2027 | $50,463,149 | 1.7% |
| Pg&e Corp.NOTE 4.250%12/0 | NOTE 4.250%12/0 | $47,525,062 | 1.6% |
| Microchip Technology Inc..DEP SHS REPSTG | DEP SHS REPSTG | $46,450,746 | 1.6% |
| Blackrock Mun Target Term TRCOM SHS BEN IN | COM SHS BEN IN | $44,771,545 | 1.5% |
| Integer Hldgs Corp.DBCV 1.875% 3/1 | DBCV 1.875% 3/1 | $43,942,264 | 1.5% |
| Apollo Global Mgmt Inc.SER A MAND CNV | SER A MAND CNV | $43,457,785 | 1.5% |
| Liberty Media Corp. DelNOTE 2.250% 8/1 | NOTE 2.250% 8/1 | $42,050,710 | 1.4% |
| Post Hldgs Inc.NOTE 2.500% 8/1 | NOTE 2.500% 8/1 | $41,655,230 | 1.4% |
| Merit Med Sys Inc.NOTE 3.000% 2/0 | NOTE 3.000% 2/0 | $41,080,767 | 1.4% |
| Akamai Technologies Inc.NOTE 0.375% 9/0 | NOTE 0.375% 9/0 | $40,843,389 | 1.4% |
| ON Semiconductor Corp.NOTE 5/0 | NOTE 5/0 | $39,963,727 | 1.3% |
| Nine Energy Service Inc.COMMON STOCK | COMMON STOCK | $39,180,461 | 1.3% |
| Datadog Inc.NOTE 12/0 | NOTE 12/0 | $39,071,712 | 1.3% |
| Revolution Medicines Inc.NOTE 0.500% 5/0 | NOTE 0.500% 5/0 | $38,069,140 | 1.3% |
| Freshpet Inc.NOTE 3.000% 4/0 | NOTE 3.000% 4/0 | $36,956,373 | 1.2% |
| Bridgebio Pharma Inc.NOTE 2.250% 2/0 | NOTE 2.250% 2/0 | $36,917,577 | 1.2% |
| Irhythm Holdings Inc.NOTE 1.500% 9/0 | NOTE 1.500% 9/0 | $35,896,303 | 1.2% |
| Live Nation Entertainment INNOTE 2.875% 1/1 | NOTE 2.875% 1/1 | $35,565,452 | 1.2% |
| Peloton Interactive Inc.NOTE 5.500%12/0 | NOTE 5.500%12/0 | $34,867,996 | 1.2% |
| Fluor Corp.NOTE 1.125% 8/1 | NOTE 1.125% 8/1 | $34,699,438 | 1.2% |
| Jazz Investments I LtdNOTE 3.125% 9/1 | NOTE 3.125% 9/1 | $34,657,429 | 1.2% |
| Northern Oil & Gas Inc.NOTE 3.625% 4/1 | NOTE 3.625% 4/1 | $31,899,375 | 1.1% |
| Affirm Hldgs Inc.NOTE 0.750%12/1 | NOTE 0.750%12/1 | $31,704,730 | 1.1% |
| Cyberark Software LtdNOTE 6/1 | NOTE 6/1 | $31,616,914 | 1.1% |
| Cloudflare Inc.NOTE 6/1 | NOTE 6/1 | $31,512,824 | 1.1% |
| Unity Software Inc.NOTE 3/1 | NOTE 3/1 | $30,459,761 | 1.0% |
| Oracle Corp.6.5 DEP CUM SR D | 6.5 DEP CUM SR D | $29,118,755 | 1.0% |
| Meritage Homes Corp.NOTE 1.750% 5/1 | NOTE 1.750% 5/1 | $28,997,541 | 1.0% |
| Patrick Inds Inc.NOTE 1.750%12/0 | NOTE 1.750%12/0 | $28,330,050 | 0.9% |
| Liberty Media Corp. DelNOTE 3.750% 3/1 | NOTE 3.750% 3/1 | $28,083,899 | 0.9% |
| Burlington Stores Inc.NOTE 1.250%12/1 | NOTE 1.250%12/1 | $27,985,049 | 0.9% |
| Progress Software Corp.NOTE 3.500% 3/0 | NOTE 3.500% 3/0 | $27,466,838 | 0.9% |
| Bank OF Amer Corp.7.25%CNV PFD L | 7.25%CNV PFD L | $26,133,216 | 0.9% |
| Parsons Corp. DelNOTE 2.625% 3/0 | NOTE 2.625% 3/0 | $25,808,512 | 0.9% |
| Biomarin Pharmaceutical Inc.NOTE 1.250% 5/1 | NOTE 1.250% 5/1 | $25,738,211 | 0.9% |
| iShares Gold TRISHARES NEW | ISHARES NEW | $24,768,790 | 0.8% |
Western Digital Corp.NOTE 3.000%11/1$150,816,792
- Class
- NOTE 3.000%11/1
- Share
- 5.1%
Alphabet Inc.DEP SHS RP1/20 A$122,643,950
- Class
- DEP SHS RP1/20 A
- Share
- 4.1%
Mks Inc..NOTE 1.250% 6/0$107,477,663
- Class
- NOTE 1.250% 6/0
- Share
- 3.6%
Lumentum Hldgs Inc.NOTE 0.500% 6/1$84,112,403
- Class
- NOTE 0.500% 6/1
- Share
- 2.8%
Lantheus Hldgs Inc.NOTE 2.625%12/1$74,003,121
- Class
- NOTE 2.625%12/1
- Share
- 2.5%
Hewlett Packard Enterprise C7.625 MAND CONV$70,210,944
- Class
- 7.625 MAND CONV
- Share
- 2.4%
Cable One Inc.NOTE 1.125% 3/1$58,775,896
- Class
- NOTE 1.125% 3/1
- Share
- 2.0%
Qxo Inc.5.50 DEP PFD$57,413,691
- Class
- 5.50 DEP PFD
- Share
- 1.9%
Boeing CODEP CONV PFD A$56,171,414
- Class
- DEP CONV PFD A
- Share
- 1.9%
Tetra Tech Inc. NewDBCV 2.250% 8/1$55,268,887
- Class
- DBCV 2.250% 8/1
- Share
- 1.9%
Uber Technologies Inc.NOTE 0.875%12/0$54,331,944
- Class
- NOTE 0.875%12/0
- Share
- 1.8%
Snowflake Inc.NOTE 10/0$54,155,943
- Class
- NOTE 10/0
- Share
- 1.8%
Chefs Whse Inc.NOTE 2.375%12/1$53,041,671
- Class
- NOTE 2.375%12/1
- Share
- 1.8%
Etsy Inc.NOTE 0.125%10/0$50,886,574
- Class
- NOTE 0.125%10/0
- Share
- 1.7%
Nextera Energy Inc.UNIT 06/01/2027$50,463,149
- Class
- UNIT 06/01/2027
- Share
- 1.7%
Pg&e Corp.NOTE 4.250%12/0$47,525,062
- Class
- NOTE 4.250%12/0
- Share
- 1.6%
Microchip Technology Inc..DEP SHS REPSTG$46,450,746
- Class
- DEP SHS REPSTG
- Share
- 1.6%
Blackrock Mun Target Term TRCOM SHS BEN IN$44,771,545
- Class
- COM SHS BEN IN
- Share
- 1.5%
Integer Hldgs Corp.DBCV 1.875% 3/1$43,942,264
- Class
- DBCV 1.875% 3/1
- Share
- 1.5%
Apollo Global Mgmt Inc.SER A MAND CNV$43,457,785
- Class
- SER A MAND CNV
- Share
- 1.5%
Liberty Media Corp. DelNOTE 2.250% 8/1$42,050,710
- Class
- NOTE 2.250% 8/1
- Share
- 1.4%
Post Hldgs Inc.NOTE 2.500% 8/1$41,655,230
- Class
- NOTE 2.500% 8/1
- Share
- 1.4%
Merit Med Sys Inc.NOTE 3.000% 2/0$41,080,767
- Class
- NOTE 3.000% 2/0
- Share
- 1.4%
Akamai Technologies Inc.NOTE 0.375% 9/0$40,843,389
- Class
- NOTE 0.375% 9/0
- Share
- 1.4%
ON Semiconductor Corp.NOTE 5/0$39,963,727
- Class
- NOTE 5/0
- Share
- 1.3%
Nine Energy Service Inc.COMMON STOCK$39,180,461
- Class
- COMMON STOCK
- Share
- 1.3%
Datadog Inc.NOTE 12/0$39,071,712
- Class
- NOTE 12/0
- Share
- 1.3%
Revolution Medicines Inc.NOTE 0.500% 5/0$38,069,140
- Class
- NOTE 0.500% 5/0
- Share
- 1.3%
Freshpet Inc.NOTE 3.000% 4/0$36,956,373
- Class
- NOTE 3.000% 4/0
- Share
- 1.2%
Bridgebio Pharma Inc.NOTE 2.250% 2/0$36,917,577
- Class
- NOTE 2.250% 2/0
- Share
- 1.2%
Irhythm Holdings Inc.NOTE 1.500% 9/0$35,896,303
- Class
- NOTE 1.500% 9/0
- Share
- 1.2%
Live Nation Entertainment INNOTE 2.875% 1/1$35,565,452
- Class
- NOTE 2.875% 1/1
- Share
- 1.2%
Peloton Interactive Inc.NOTE 5.500%12/0$34,867,996
- Class
- NOTE 5.500%12/0
- Share
- 1.2%
Fluor Corp.NOTE 1.125% 8/1$34,699,438
- Class
- NOTE 1.125% 8/1
- Share
- 1.2%
Jazz Investments I LtdNOTE 3.125% 9/1$34,657,429
- Class
- NOTE 3.125% 9/1
- Share
- 1.2%
Northern Oil & Gas Inc.NOTE 3.625% 4/1$31,899,375
- Class
- NOTE 3.625% 4/1
- Share
- 1.1%
Affirm Hldgs Inc.NOTE 0.750%12/1$31,704,730
- Class
- NOTE 0.750%12/1
- Share
- 1.1%
Cyberark Software LtdNOTE 6/1$31,616,914
- Class
- NOTE 6/1
- Share
- 1.1%
Cloudflare Inc.NOTE 6/1$31,512,824
- Class
- NOTE 6/1
- Share
- 1.1%
Unity Software Inc.NOTE 3/1$30,459,761
- Class
- NOTE 3/1
- Share
- 1.0%
Oracle Corp.6.5 DEP CUM SR D$29,118,755
- Class
- 6.5 DEP CUM SR D
- Share
- 1.0%
Meritage Homes Corp.NOTE 1.750% 5/1$28,997,541
- Class
- NOTE 1.750% 5/1
- Share
- 1.0%
Patrick Inds Inc.NOTE 1.750%12/0$28,330,050
- Class
- NOTE 1.750%12/0
- Share
- 0.9%
Liberty Media Corp. DelNOTE 3.750% 3/1$28,083,899
- Class
- NOTE 3.750% 3/1
- Share
- 0.9%
Burlington Stores Inc.NOTE 1.250%12/1$27,985,049
- Class
- NOTE 1.250%12/1
- Share
- 0.9%
Progress Software Corp.NOTE 3.500% 3/0$27,466,838
- Class
- NOTE 3.500% 3/0
- Share
- 0.9%
Bank OF Amer Corp.7.25%CNV PFD L$26,133,216
- Class
- 7.25%CNV PFD L
- Share
- 0.9%
Parsons Corp. DelNOTE 2.625% 3/0$25,808,512
- Class
- NOTE 2.625% 3/0
- Share
- 0.9%
Biomarin Pharmaceutical Inc.NOTE 1.250% 5/1$25,738,211
- Class
- NOTE 1.250% 5/1
- Share
- 0.9%
iShares Gold TRISHARES NEW$24,768,790
- Class
- ISHARES NEW
- Share
- 0.8%
The share class is shown on a wider screen.
The 50 largest of 108 positions by value, with holdings of the same security combined. The 108 largest are in this firm's machine-readable record. Share counts and quarter-on-quarter changes for each position are on EDGAR. View the full information table on EDGAR
This filing
- Form
- 13F-HR
- CIK
- 61227
- File number
- 028-00046
- Options
- 0 call, 0 put
- In the 25 largest
- 51.3%
- Prior quarter
- $2,727,560,466 at 31 March 2026
- Positions opened
- 13
- Positions closed
- 16
Common questions
What are Mackay Shields’ 13F holdings worth?
$2,985,036,018 across 108 positions for the quarter ended 30 June 2026.
What is Mackay Shields’ largest 13F holding?
WESTERN DIGITAL CORP (NOTE 3.000%11/1) was the largest position at $150,816,792, or 5.1% of reported 13F value, as of 30 June 2026.
How concentrated is Mackay Shields’ 13F portfolio?
The ten largest positions accounted for 28.0% of reported value and the twenty-five largest for 51.3%, across 108 positions as of 30 June 2026.
Does Form 13F show everything Mackay Shields manages?
No. Form 13F covers only long positions in exchange-traded securities over which the manager has investment discretion, valued at quarter end. It excludes cash, most bonds, private funds, and any assets the firm does not have discretion over, so it is neither the firm's total assets nor any individual client's portfolio.
How often does Mackay Shields file its 13F?
Every quarter. Managers file within 45 days of each quarter's end, so the figures are a snapshot that changes between filings. This page shows the quarter ended 30 June 2026.
Answered from this filing and the prior quarter's.