MACOM Technology Solutions Holdings, Inc.
MX ˙ BMV ˙ US55405Y1001
SecurityMX:MTSI / MACOM Technology Solutions Holdings, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership216,968 shares
Latest Disclosed Value $ 37,162,581
Sei Investments Co reports 15.24% decrease in ownership of MTSI / MACOM Technology Solutions Holdings, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 216,968 shares of MACOM Technology Solutions Holdings, Inc. (MX:MTSI) valued at $37,162,581 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 255,967 shares of MACOM Technology Solutions Holdings, Inc.. This represents a change in shares of -15.24% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-02-13 2025-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 216,968 -38,999 -15.24 37,163 16.62 0.0367
2025-11-13 2025-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 255,967 -17,379 -6.36 31,865 -18.65 0.0343
2025-08-14 2025-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 273,346 -9,128 -3.23 39,168 38.14 0.0454
2025-05-14 2025-03-31 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 282,474 8,189 2.99 28,355 -20.43 0.0365
2025-05-13 2025-03-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 270,264 -4,021 34,872 0.0379
2025-02-11 2024-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 274,285 -37,602 -12.06 35,633 2.69 0.0458
2024-11-12 2024-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 311,887 -2,287 -0.73 34,701 -0.91 0.0451
2024-08-13 2024-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 314,174 16,559 5.56 35,021 23.04 0.0496
2024-05-07 2024-03-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 297,615 37,407 14.38 28,464 17.68 0.0417
2024-02-14 2023-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 260,208 -46,783 -15.24 24,186 -3.43 0.0388
2023-11-14 2023-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 306,991 -24,786 -7.47 25,044 15.19 0.0450
2023-08-11 2023-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 331,777 16,811 5.34 21,741 -2.56 0.0379
2023-05-12 2023-03-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 314,966 62,953 24.98 22,312 40.58 0.0414
2023-02-10 2022-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 252,013 -29,041 -10.33 15,872 9.03 0.0353
2022-11-14 2022-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 281,054 -10,377 -3.56 14,556 8.91 0.0325
2022-08-15 2022-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 291,431 29,952 11.45 13,365 -14.34 0.0289
2022-05-13 2022-03-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 261,479 26,291 11.18 15,602 -15.41 0.0314
2022-02-14 2021-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 235,188 -6,452 -2.67 18,444 17.62 0.0346
2021-11-12 2021-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 241,640 -16,745 -6.48 15,681 -5.34 0.0329
2021-08-06 2021-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 258,385 9,244 3.71 16,566 14.82 0.0367
2021-05-12 2021-03-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 249,141 -28,866 -10.38 14,428 -5.73 0.0364
2021-02-08 2020-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 278,007 -14,180 -4.85 15,305 53.80 0.0396
2020-12-04 2020-09-30 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 292,187 -35,533 -10.84 9,951 -11.57 0.0288
2020-11-06 2020-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 293,653 -34,067 10,001 24,080.1844
2020-08-17 2020-06-30 13F/A-1 MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 327,720 -3,594 -1.08 11,253 79.16 0.0349
2020-08-11 2020-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 337,429 6,115 9,128 24,760.1859
2020-05-14 2020-03-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 331,314 -9,163 -2.69 6,281 -30.62 0.0231
2020-02-06 2019-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 340,477 -2,561 -0.75 9,053 22.84 0.0270
2019-11-12 2019-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 343,038 97,572 39.75 7,370 98.07 0.0189
2019-08-14 2019-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 245,466 25,039 11.36 3,721 1.00 0.0122
2019-05-15 2019-03-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 220,427 168,870 327.54 3,684 310.24 0.0124
2019-02-13 2018-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 51,557 8,445 19.59 898 1.01 0.0032
2018-11-08 2018-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 43,112 -54,593 -55.88 889 -60.51 0.0032
2018-08-03 2018-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 97,705 7,549 8.37 2,251 50.37 0.0077
2018-05-11 2018-03-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 90,156 53,930 148.87 1,497 26.97 0.0057
2018-02-08 2017-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 36,226 10,754 42.22 1,179 3.79 0.0041
2017-11-06 2017-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 25,472 13,214 107.80 1,136 66.08 0.0040
2017-07-31 2017-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 12,258 1,257 11.43 684 28.81 0.0027
2017-05-05 2017-03-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 11,001 470 4.46 531 8.81 0.0023
2017-02-02 2016-12-31 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 10,531 -9,078 -46.30 488 -41.20 0.0024
2016-11-04 2016-09-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 19,609 919 4.92 830 34.74 0.0042
2016-08-11 2016-06-30 13F MACOM TECH SOLUTIONS HLDGS I COM 55405Y100 18,690 -16,607 -47.05 616 -60.16 0.0037
2016-05-10 2016-03-31 13F/A-1 MA COM TECHNOLOGY SOLUTIONS COM 55405Y100 35,297 21,349 153.06 1,546 170.75 0.0096
2016-02-03 2015-12-31 13F MA COM TECHNOLOGY SOLUTIONS COM 55405Y100 13,948 2,871 25.92 571 77.33 0.0035
2015-11-02 2015-09-30 13F/A-1 MA COM TECHNOLOGY SOLUTIONS COM 55405Y100 11,077 -217 -1.92 322 -25.29 0.0030
2015-10-30 2015-09-30 13F DIREXION SHS ETF TR COM 55405Y100 11,077 322
2015-08-07 2015-06-30 13F/A-1 MA COM TECHNOLOGY SOLUTIONS COM 55405Y100 11,294 11,236 19,372.41 431 21,450.00 0.0039
2015-08-04 2015-06-30 13F MA COM TECHNOLOGY SOLUTIONS COM 55405Y100 11,294 11,236 431 0.0039
2015-05-14 2015-03-31 13F/A-1 MA COM TECHNOLOGY SOLUTIONS COM 55405Y100 58 58 2 0.0000
2015-05-01 2015-03-31 13F MA COM TECHNOLOGY SOLUTIONS COM 55405Y100 58 2
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.