Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
369 institutional managers reported holding PLXS for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 59%. 77 opened new positions; 40 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 4.28M | 15.65% | $864.6M | trimmed -1% | ≤2013 |
| Vanguard Group | 3.68M | 13.49% | $744.9M | added +1.3% | ≤2013 |
| American Century Companies INC | 1.56M | 5.72% | $316.0M | unchanged | 2019 Q4 |
| Disciplined Growth Investors INC /MN | 1.49M | 5.47% | $302.3M | trimmed -6% | ≤2013 |
| Dimensional Fund Advisors | 1.12M | 4.10% | $226.4M | trimmed -18.5% | ≤2013 |
| State Street | 1.05M | 3.84% | $211.9M | added +1.7% | ≤2013 |
| BNP Paribas Financial Markets | 934.9k | 3.42% | $189.1M | trimmed -8.6% | ≤2013 |
| Geode Capital | 680.0k | 2.49% | $137.5M | added +1.1% | ≤2013 |
| Earnest Partners LLC | 652.4k | 2.39% | $131.9M | trimmed -2.9% | 2020 Q2 |
| AllianceBernstein | 629.8k | 2.31% | $127.4M | added +968.8% | ≤2013 |
| Fuller & Thaler Asset Management, INC. | 588.8k | 2.16% | $119.1M | added +31.8% | 2024 Q4 |
| Morgan Stanley | 427.9k | 1.57% | $86.5M | trimmed -14.8% | ≤2013 |
| Victory Capital Management INC | 413.6k | 1.51% | $83.6M | added +18.5% | 2013 Q3 |
| Silvercrest Asset Management Group LLC | 390.0k | 1.43% | $78.9M | trimmed -23.3% | 2017 Q4 |
| Charles Schwab Investment Management | 386.1k | 1.41% | $78.1M | trimmed -1.4% | ≤2013 |
| Westfield Capital Management CO LP | 384.5k | 1.41% | $77.8M | added +7294.1% | 2023 Q3 |
| Nuveen | 362.5k | 1.33% | $73.3M | trimmed -7.3% | 2019 Q2 |
| Northern Trust | 316.6k | 1.16% | $64.0M | trimmed -3.5% | ≤2013 |
| Millennium Management | 305.7k | 1.12% | $61.8M | added +2500.2% | 2018 Q1 |
| Boston Trust Walden CORP | 296.5k | 1.09% | $60.0M | trimmed -12.6% | 2023 Q2 |
| Thrivent Financial for Lutherans | 292.7k | 1.07% | $59.2M | trimmed -1.7% | ≤2013 |
| Invesco | 268.1k | 0.98% | $54.2M | added +125.9% | ≤2013 |
| UBS | 222.5k | 0.81% | $45.0M | trimmed -38.8% | ≤2013 |
| Goldman Sachs | 190.3k | 0.70% | $38.5M | added +18.8% | ≤2013 |
| BNY Mellon | 180.7k | 0.66% | $36.5M | trimmed -2.3% | ≤2013 |
| Bank OF America CORP /DE/ | 175.8k | 0.64% | $35.6M | unchanged | ≤2013 |
| Emerald Advisers, LLC | 166.5k | 0.61% | $33.7M | opened | 2026 Q1 |
| D. E. Shaw | 163.9k | 0.60% | $33.2M | trimmed -20.3% | 2013 Q4 |
| Nomura Asset Management International INC. | 155.0k | 0.57% | $31.3M | added +13.1% | 2025 Q3 |
| Principal Financial Group INC | 153.4k | 0.56% | $31.0M | added +2.3% | ≤2013 |
| MFS Investment Management | 147.8k | 0.54% | $29.9M | trimmed -31.9% | 2014 Q4 |
| FMR (Fidelity) | 132.9k | 0.49% | $26.9M | added +18.1% | 2014 Q4 |
| Royal Bank OF Canada | 126.6k | 0.46% | $25.6M | trimmed -26.3% | ≤2013 |
| Cartenna Capital, LP (focused) | 115.0k | 0.42% | $23.3M | opened | 2026 Q1 |
| MetLife Investment Management, LLC | 102.7k | 0.38% | $20.8M | trimmed -19.1% | 2017 Q4 |
| Emerald Mutual Fund Advisers Trust | 102.3k | 0.38% | $20.7M | opened | 2026 Q1 |
| Jane Street | 99.7k | 0.36% | $20.2M | added +249% | 2020 Q3 |
| Public Sector Pension Investment Board | 95.9k | 0.35% | $19.4M | added +2.7% | ≤2013 |
| Public Employees Retirement Association OF Colorado | 92.1k | 0.34% | $18.6M | added +3011.2% | ≤2013 |
| Connor, Clark & Lunn Investment Management LTD. | 85.5k | 0.31% | $17.3M | trimmed -3.5% | 2024 Q4 |
| T. Rowe Price Investment Management, INC. | 83.4k | 0.30% | $16.9M | opened | 2026 Q1 |
| Qube Research & Technologies LTD | 83.2k | 0.30% | $16.8M | trimmed -41.6% | 2022 Q3 |
| Panagora Asset Management INC | 82.8k | 0.30% | $16.7M | unchanged | 2024 Q3 |
| GHP Investment Advisors, INC. | 79.8k | 0.29% | $16.1M | trimmed -1.8% | 2021 Q1 |
| Two Sigma | 79.2k | 0.29% | $16.0M | added +1035.4% | 2025 Q4 |
| T. Rowe Price | 78.8k | 0.29% | $15.9M | added +208.5% | ≤2013 |
| SG Capital Management LLC | 78.3k | 0.29% | $15.8M | added +124.6% | 2025 Q4 |
| Rhumbline Advisers | 77.0k | 0.28% | $15.6M | added +1.4% | ≤2013 |
| Kennedy Capital Management LLC | 76.6k | 0.28% | $15.5M | trimmed -1.6% | ≤2013 |
| Axiom Investors LLC /DE | 76.0k | 0.28% | $15.4M | opened | 2026 Q1 |
Largest 50 of 369 shown; the full ranked, searchable register is at boothcheck.com/holders/PLXS. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.