MACOM Technology Solutions Holdings, Inc.
MX ˙ BMV ˙ US55405Y1001
SecurityMX:MTSI / MACOM Technology Solutions Holdings, Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership555,156 shares
Latest Disclosed Value $ 123,283,715
Morgan Stanley reports 26.78% decrease in ownership of MTSI / MACOM Technology Solutions Holdings, Inc.

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 555,156 shares of MACOM Technology Solutions Holdings, Inc. (MX:MTSI) valued at $123,283,715 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 758,162 shares of MACOM Technology Solutions Holdings, Inc.. This represents a change in shares of -26.78% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 555,156 -203,006 -26.78 123,284 -5.06 0.0074
2026-05-27 2025-12-31 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 758,162 -18,905 -2.43 129,858 34.24 0.0078
2026-02-13 2025-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 758,162 -18,905 129,858 0.0078
2026-05-27 2025-09-30 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 777,067 404,498 108.57 96,737 81.21 0.0059
2025-11-14 2025-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 777,067 404,498 96,737 0.0059
2025-08-15 2025-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 372,569 16,973 4.77 53,386 49.56 0.0035
2025-05-15 2025-03-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 355,596 5,920 1.69 35,695 -21.42 0.0026
2025-05-15 2024-12-31 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 349,676 23,466 7.19 45,427 25.16 0.0032
2025-02-14 2024-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 349,676 23,466 45,427 0.0032
2025-05-14 2024-09-30 13F/A-2 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 326,210 12,944 4.13 36,294 3.94 0.0026
2025-02-14 2024-09-30 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 326,210 12,944 36,294 0.0026
2024-11-14 2024-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 326,210 12,944 36,294 0.0003
2025-05-14 2024-06-30 13F/A-2 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 313,266 10,108 3.33 34,920 20.44 0.0027
2024-10-17 2024-06-30 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 313,266 10,108 34,920 0.0027
2024-08-14 2024-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 313,266 10,108 34,920 0.0027
2024-10-17 2024-03-31 13F/A-2 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 303,158 -137,196 -31.16 28,994 -29.16 0.0023
2024-08-16 2024-03-31 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 303,158 -137,196 28,994 0.0003
2024-05-15 2024-03-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 303,158 -137,196 28,994 0.0023
2024-08-16 2023-12-31 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 440,354 143,599 48.39 40,931 69.07 0.0036
2024-02-13 2023-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 440,354 143,599 40,931 0.0036
2023-11-15 2023-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 296,755 -28,098 -8.65 24,209 13.73 0.0025
2023-08-14 2023-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 324,853 34,995 12.07 21,288 3.67 0.0021
2023-05-15 2023-03-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 289,858 -34,483 -10.63 20,534 0.52 0.0022
2023-02-14 2022-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 324,341 14,022 4.52 20,427 27.11 0.0023
2022-11-14 2022-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 310,319 -15,384 -4.72 16,070 7.02 0.0022
2022-10-27 2022-06-30 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 325,703 211,492 185.18 15,016 119.60 0.0019
2022-08-15 2022-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 325,703 211,492 15,016 0.0019
2022-10-27 2022-03-31 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 114,211 50,376 78.92 6,838 36.79 0.0009
2022-05-13 2022-03-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 114,211 50,376 6,838 0.0009
2022-02-14 2021-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 63,835 2,147 3.48 4,999 24.94 0.0006
2021-11-15 2021-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 61,688 -5,855 -8.67 4,001 -7.53 0.0005
2021-08-23 2021-06-30 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 67,543 48,658 257.65 4,327 295.16 0.0006
2021-08-16 2021-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 67,543 48,658 4,327 0.0001
2021-05-17 2021-03-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 18,885 -29,553 -61.01 1,095 -58.94 0.0002
2021-02-16 2020-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 48,438 -10,384 -17.65 2,667 33.35 0.0004
2020-11-13 2020-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 58,822 38,753 193.10 2,000 190.70 0.0004
2020-08-14 2020-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 20,069 -179,964 -89.97 688 -81.83 0.0002
2020-05-26 2020-03-31 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 200,033 133,435 200.36 3,787 113.71 0.0010
2020-05-15 2020-03-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 200,033 133,435 3,787 290.9205
2020-02-14 2019-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 66,598 27,579 70.68 1,772 111.20 0.0004
2019-11-14 2019-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 39,019 -31,467 -44.64 839 -21.29 0.0002
2019-08-14 2019-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 70,486 -13,376 -15.95 1,066 -23.91 0.0003
2019-05-15 2019-03-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 83,862 -246,961 -74.65 1,401 -70.81 0.0004
2019-02-14 2018-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 330,823 248,073 299.79 4,800 181.69 0.0014
2019-04-23 2018-09-30 13F/A-2 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 82,750 -17,315 -17.30 1,704 -26.11 0.0004
2018-11-20 2018-09-30 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 82,750 0 1,704 0.0004
2018-11-14 2018-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 82,750 -17,315 1,704
2019-04-23 2018-06-30 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 100,065 8,029 8.72 2,306 50.92 0.0006
2018-08-14 2018-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 100,065 8,029 2,306
2019-04-23 2018-03-31 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 92,036 4,965 5.70 1,528 -46.06 0.0004
2018-05-14 2018-03-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 92,036 4,965 1,528
2019-04-23 2017-12-31 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 87,071 31,103 55.57 2,833 13.46 0.0008
2018-02-14 2017-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 87,071 31,103 2,833
2017-11-14 2017-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 55,968 10,246 22.41 2,497 -2.08 0.0007
2017-08-11 2017-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 45,722 1,087 2.44 2,550 18.22 0.0008
2017-05-22 2017-03-31 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 44,635 -25,932 -36.75 2,157 -33.98 0.0007
2017-05-12 2017-03-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 44,635 2,157
2017-02-22 2016-12-31 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 70,567 64,044 981.82 3,267 1,083.70 0.0011
2017-02-13 2016-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 70,567 3,267
2016-11-10 2016-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 6,523 4,849 289.67 276 401.82 0.0001
2016-08-12 2016-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 1,674 -37,745 -95.75 55 -96.81 0.0000
2016-05-12 2016-03-31 13F MA COM TECHNOLOGY SOLUTIONS COM 55405Y100 39,419 20,848 112.26 1,726 127.11 0.0007
2016-02-09 2015-12-31 13F MA COM TECHNOLOGY SOLUTIONS COM 55405Y100 18,571 17,350 1,420.97 760 2,071.43 0.0003
2016-02-08 2015-09-30 13F/A-1 MA COM TECHNOLOGY SOLUTIONS COM 55405Y100 1,221 -1,196 -49.48 35 -61.96 0.0000
2015-11-09 2015-09-30 13F MA COM TECHNOLOGY SOLUTIONS COM 55405Y100 1,221 35
2015-08-12 2015-06-30 13F MA COM TECHNOLOGY SOLUTIONS COM 55405Y100 2,417 -5,935 -71.06 92 -70.42 0.0000
2015-05-14 2015-03-31 13F MA COM TECHNOLOGY SOLUTIONS COM 55405Y100 8,352 3,061 57.85 311 87.35 0.0001
2015-02-13 2014-12-31 13F MA COM TECHNOLOGY SOLUTIONS COM 55405Y100 5,291 4,244 405.35 166 621.74 0.0001
2014-12-16 2014-09-30 13F/A-1 MA COM TECHNOLOGY SOLUTIONS COM 55405Y100 1,047 803 329.10 23 360.00 0.0000
2014-11-14 2014-09-30 13F MA COM TECHNOLOGY SOLUTIONS COM 55405Y100 1,047 23
2014-05-13 2014-03-31 13F MA COM TECHNOLOGY SOLUTIONS COM 55405Y100 244 -12,654 -98.11 5 -97.72 0.0000
2014-02-13 2013-12-31 13F MA COM TECHNOLOGY SOLUTIONS COM 55405Y100 12,898 -3,867 -23.07 219 -23.43 0.0001
2013-11-13 2013-09-30 13F M COM 55405Y100 16,765 -13,495 -44.60 286 -35.15 0.0001
2013-08-08 2013-06-30 13F M COM 55405Y100 30,260 30,260 441 0.0002
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.