Plexus Corp.
US ˙ NasdaqGS ˙ US7291321005

SecurityPLXS / Plexus Corp.
InstitutionSei Investments Co
Latest Disclosed Ownership17,587 shares
Latest Disclosed Value $ 2,585,350
Sei Investments Co reports 44.37% increase in ownership of PLXS / Plexus Corp.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 17,587 shares of Plexus Corp. (US:PLXS) valued at $2,585,289 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 12,182 shares of Plexus Corp.. This represents a change in shares of 44.37% during the quarter. The current value of the position is $5,057,142 USD.

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 PLEXUS COM 729132100 17,587 5,405 44.37 2,585 46.71 0.0026
2025-11-13 2025-09-30 13F PLEXUS COM 729132100 12,182 899 7.97 1,763 15.47 0.0019
2025-08-14 2025-06-30 13F PLEXUS COM 729132100 11,283 3,487 44.73 1,527 52.91 0.0018
2025-05-14 2025-03-31 13F/A-1 PLEXUS COM 729132100 7,796 532 7.32 999 -12.15 0.0013
2025-05-13 2025-03-31 13F PLEXUS COM 729132100 7,299 35 1,140 0.0012
2025-02-11 2024-12-31 13F PLEXUS COM 729132100 7,264 1,692 30.37 1,137 49.28 0.0015
2024-11-12 2024-09-30 13F PLEXUS COM 729132100 5,572 401 7.75 762 42.78 0.0010
2024-08-13 2024-06-30 13F PLEXUS COM 729132100 5,171 -303 -5.54 534 2.70 0.0008
2024-05-07 2024-03-31 13F PLEXUS COM 729132100 5,474 0 0.00 519 -12.18 0.0008
2024-02-14 2023-12-31 13F PLEXUS COM 729132100 5,474 39 0.72 592 17.03 0.0010
2023-11-14 2023-09-30 13F PLEXUS COM 729132100 5,435 296 5.76 505 0.20 0.0009
2023-08-11 2023-06-30 13F PLEXUS COM 729132100 5,139 0 0.00 505 0.60 0.0009
2023-05-12 2023-03-31 13F PLEXUS COM 729132100 5,139 -4,055 -44.10 501 -47.04 0.0009
2023-02-10 2022-12-31 13F PLEXUS COM 729132100 9,194 4,794 108.95 946 145.71 0.0021
2022-11-14 2022-09-30 13F PLEXUS COM 729132100 4,400 4,400 385 0.0009
2020-12-04 2020-09-30 13F/A-1 PLEXUS COM 729132100 0 -4,391 -100.00 0 -100.00
2020-08-17 2020-06-30 13F/A-1 PLEXUS COM 729132100 4,391 0 0.00 310 29.17 0.0010
2020-08-11 2020-06-30 13F PLEXUS COM 729132100 4,391 0 338 916.8430
2020-05-14 2020-03-31 13F PLEXUS COM 729132100 4,391 -7,753 -63.84 240 -74.33 0.0009
2020-02-06 2019-12-31 13F PLEXUS COM 729132100 12,144 4,253 53.90 935 89.66 0.0028
2019-11-12 2019-09-30 13F PLEXUS COM 729132100 7,891 -21,211 -72.89 493 -70.98 0.0013
2019-08-14 2019-06-30 13F PLEXUS COM 729132100 29,102 -1,060 -3.51 1,699 -7.56 0.0055
2019-05-15 2019-03-31 13F PLEXUS COM 729132100 30,162 162 0.54 1,838 4.73 0.0062
2019-02-13 2018-12-31 13F PLEXUS COM 729132100 30,000 -14,994 -33.32 1,755 -33.32 0.0062
2018-11-08 2018-09-30 13F PLEXUS COM 729132100 44,994 10,090 28.91 2,632 26.60 0.0095
2018-08-03 2018-06-30 13F PLEXUS COM 729132100 34,904 34,804 34,804.00 2,079 34,550.00 0.0071
2018-05-11 2018-03-31 13F PLEXUS COM 729132100 100 42 72.41 6 50.00 0.0000
2018-02-08 2017-12-31 13F PLEXUS COM 729132100 58 0 0.00 4 0.00 0.0000
2017-11-06 2017-09-30 13F PLEXUS COM 729132100 58 -23,758 -99.76 4 -99.68 0.0000
2017-07-31 2017-06-30 13F PLEXUS COM 729132100 23,816 -21,174 -47.06 1,252 -51.85 0.0050
2017-05-05 2017-03-31 13F PLEXUS COM 729132100 44,990 -6,200 -12.11 2,600 -6.00 0.0114
2017-02-02 2016-12-31 13F PLEXUS COM 729132100 51,190 -6,730 -11.62 2,766 2.10 0.0134
2016-11-04 2016-09-30 13F PLEXUS COM 729132100 57,920 -1,780 -2.98 2,709 5.04 0.0138
2016-08-11 2016-06-30 13F PLEXUS COM 729132100 59,700 0 0.00 2,579 9.33 0.0155
2016-05-10 2016-03-31 13F/A-1 PLEXUS COM 729132100 59,700 0 0.00 2,359 13.14 0.0147
2016-02-03 2015-12-31 13F PLEXUS COM 729132100 59,700 59,700 2,085 0.0127
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.