Comparable stake leader
BlackRock, Inc.
SEC ownership of PLEXUS CORP
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000785786.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
31 Mar 2026
- Public ticker
- PLXS on Nasdaq
- Parsed ownership sources
-
13F and 13D/G
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BlackRock, Inc.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BlackRock, Inc.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000785786
- Issuer location
- Neenah, WI
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of PLEXUS CORP (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
31 Mar 2026
13F
13D/G
Lead comparable stake: 15%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 15%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
15%
VANGUARD PORTFOLIO MANAGEMENT LLC
8.5%
AMERICAN CENTURY INVESTMENT MANAG...
5.8%
VANGUARD CAPITAL MANAGEMENT LLC
5.2%
DIMENSIONAL FUND ADVISORS LP
4.2%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
15%
from 13D/G
|
$865,911,970
4,275,264 shares
|
— | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
8.5%
|
$461,178,516
2,276,975 shares
|
$0 | 31 Mar 2026 |
| AMERICAN CENTURY INVESTMENT MANAGEMENT INC |
13D/G
|
5.8%
|
$268,973,202
1,560,622 shares
|
$0 | 31 Dec 2025 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
5.2%
|
$283,565,722
1,400,048 shares
|
$0 | 31 Mar 2026 |
| DIMENSIONAL FUND ADVISORS LP |
13D/G
13F
Company
|
4.2%
|
$226,744,603
1,119,371 shares
|
-$59,960,046 | 31 Mar 2026 |
| AMERICAN CENTURY COMPANIES INC |
13F
Company
|
5.8%
|
$316,455,258
1,562,431 shares
|
— | 31 Mar 2026 |
| DISCIPLINED GROWTH INVESTORS INC /MN |
13F
Company
|
5.6%
|
$302,720,132
1,494,619 shares
|
— | 31 Mar 2026 |
| STATE STREET CORP |
13F
Company
|
3.9%
|
$212,228,501
1,047,835 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$24,004,343.
Buys
$0
Insiders: 0
Sells
$24,004,343
Insiders: 10
Net
-$24,004,343
Shares: -122,452
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 122,452
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 22,481 | $0 | $5,990,314 | -$5,990,314 |
| 3-6 | 0 | 64,195 | $0 | $13,023,332 | -$13,023,332 |
| 6-9 | 0 | 19,420 | $0 | $2,792,549 | -$2,792,549 |
| 9-12 | 0 | 16,356 | $0 | $2,198,147 | -$2,198,147 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 22 reporting-owner rows connected to PLEXUS CORP. Open a relationship link for the CIK-to-CIK filing trail.
Rows
22
Largest Forms 3/4/5 holder
Todd P. Kelsey
Net 12M change
-$24,004,344
Latest report
17 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Todd P. Kelsey | President & CEO, Director | $23,352,825 | -$8,011,535 | -26% | Mixed | 17 Jun 2026 |
| Dean A. Foate | Director, Chairman of the Board | $23,108,117 | -$3,074,468 | -12% | Mixed | 06 Feb 2026 |
| Michael V Schrock | Director | $7,780,025 | Mixed | 09 Feb 2026 | ||
| Rainer Jueckstock | Director | $5,265,611 | Mixed | 09 Feb 2026 | ||
| Steven J. Frisch | Chief Strategy Officer | $4,963,019 | Mixed | 16 Aug 2024 | ||
| Angelo Michael Ninivaggi Jr. | EVP, Chief Legal & PAO & Secy | $4,755,601 | -$3,119,392 | -40% | Mixed | 07 May 2026 |
| Patrick John Jermain | Exec. VP & CFO | $4,312,721 | -$3,387,204 | -44% | Mixed | 06 May 2026 |
| Joann M. Eisenhart | Director | $3,880,778 | Mixed | 09 Feb 2026 | ||
| Oliver K. Mihm | Exec VP & COO | $3,456,600 | -$3,226,802 | -48% | Mixed | 17 Feb 2026 |
| Peter Kelly | Director | $3,216,700 | Mixed | 29 Jan 2024 | ||
| Victor (pang Hau) Tan | Regional President - APAC | $3,159,426 | -$1,847,200 | -37% | Mixed | 11 May 2026 |
| Stephen P. Cortinovis | Director | $3,156,209 | Mixed | 15 Feb 2022 | ||
| Paul A. Rooke | Director | $2,895,970 | Mixed | 09 Feb 2026 | ||
| Karen Marie Rapp | Director | $2,309,372 | -$374,030 | -14% | Mixed | 01 Jun 2026 |
| J. Joel Quadracci | Director | $1,428,755 | Mixed | 09 Feb 2026 | ||
| Scott Theune | Regional President - AMER | $1,308,082 | Mixed | 16 Nov 2023 | ||
| Randy J. Martinez | Director | $1,196,453 | -$203,140 | -15% | Mixed | 25 Feb 2026 |
| Jennifer Wuamett | Director | $717,122 | Mixed | 09 Feb 2026 | ||
| Michael J. Running | Regional President - AMER | $361,567 | -$472,389 | -57% | Mixed | 05 Jun 2026 |
| Frank Zycinski | Regional President - EMEA | $304,132 | -$288,184 | -49% | Mixed | 12 Feb 2026 |
Recent insider transactions for PLEXUS CORP
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Todd P. Kelsey | PLXS | Common Stock, $.01 par value | Sale | -2.13% | $442,464 | $294.98 | -1,500 | 68,888 | 17 Jun 2026 | Direct |
| Michael J. Running | PLXS | Common Stock, $.01 par value | Sale | -43.4% | $138,804 | $272.16 | -510 | 665 | 05 Jun 2026 | Direct |
| Todd P. Kelsey | PLXS | Common Stock, $.01 par value | Sale | -1.4% | $290,000 | $290.00 | -1,000 | 70,388 | 03 Jun 2026 | Direct |
| Karen Marie Rapp | PLXS | Common Stock, $.01 par value | Sale | -5.86% | $135,000 | $270.00 | -500 | 8,035 | 01 Jun 2026 | Direct |
| Todd P. Kelsey | PLXS | Common Stock, $.01 par value | Sale | -1.38% | $274,750 | $274.75 | -1,000 | 71,388 | 27 May 2026 | Direct |
| Todd P. Kelsey | PLXS | Common Stock, $.01 par value | Sale | -2.03% | $379,150 | $252.77 | -1,500 | 72,388 | 20 May 2026 | Direct |
| Victor (pang Hau) Tan | PLXS | Common Stock, $.01 par value | Sale | -22.3% | $813,700 | $271.23 | -3,000 | 10,457 | 11 May 2026 | Direct |
| Angelo Michael Ninivaggi Jr. | PLXS | Common Stock, $.01 par value | Sale | -16.7% | $865,736 | $264.75 | -3,270 | 16,266 | 08 May 2026 | Direct |
| Angelo Michael Ninivaggi Jr. | PLXS | Common Stock, $.01 par value | Sale | -10.5% | $604,340 | $262.99 | -2,298 | 19,536 | 07 May 2026 | Direct |
| Patrick John Jermain | PLXS | Common Stock, $.01 par value | Discretionary transaction in accordance with Rule 16b-3(f) resulting in acquisition or disposition of issuer securities | -100% | -3,815 | 0 | 06 May 2026 | 401(k) | ||
| Todd P. Kelsey | PLXS | Common Stock, $.01 par value | Sale | -1.34% | $270,750 | $270.75 | -1,000 | 73,888 | 06 May 2026 | Direct |
| Todd P. Kelsey | PLXS | Common Stock, $.01 par value | Sale | -3.85% | $805,350 | $268.45 | -3,000 | 74,888 | 05 May 2026 | Direct |
| Todd P. Kelsey | PLXS | Common Stock, $.01 par value | Sale | -2.99% | $634,139 | $263.89 | -2,403 | 77,888 | 04 May 2026 | Direct |
| Todd P. Kelsey | PLXS | Common Stock, $.01 par value | Sale | -1.83% | $336,130 | $224.09 | -1,500 | 80,291 | 15 Apr 2026 | Direct |
| Todd P. Kelsey | PLXS | Common Stock, $.01 par value | Sale | -1.8% | $291,360 | $194.24 | -1,500 | 81,791 | 18 Mar 2026 | Direct |
| Karen Marie Rapp | PLXS | Common Stock, $.01 par value | Sale | -5.53% | $97,795 | $195.59 | -500 | 8,535 | 27 Feb 2026 | Direct |
| Michael J. Running | PLXS | Common Stock, $.01 par value | Sale | -37.3% | $143,829 | $205.47 | -700 | 1,175 | 25 Feb 2026 | Direct |
| Randy J. Martinez | PLXS | Common Stock, $.01 par value | Sale | -16.1% | $203,140 | $203.14 | -1,000 | 5,201 | 25 Feb 2026 | Direct |
| Oliver K. Mihm | PLXS | Common Stock, $.01 par value | Sale | -42.7% | $1,921,557 | $201.40 | -9,541 | 12,809 | 18 Feb 2026 | Direct |
| Todd P. Kelsey | PLXS | Common Stock, $.01 par value | Sale | -5.91% | $1,024,112 | $195.78 | -5,231 | 83,291 | 18 Feb 2026 | Direct |
| Victor (pang Hau) Tan | PLXS | Common Stock, $.01 par value | Options Exercise | 17.7% | 2,022 | 13,457 | 17 Feb 2026 | Direct | ||
| Victor (pang Hau) Tan | PLXS | Performance Stock Units | Options Exercise | -100% | -2,022 | 0 | 17 Feb 2026 | Direct | ||
| Victor (pang Hau) Tan | PLXS | Performance Stock Units | Award | 42.4% | 602 | 2,022 | 17 Feb 2026 | Direct | ||
| Michael J. Running | PLXS | Common Stock, $.01 par value | Tax liability | -21.6% | -516 | 1,875 | 17 Feb 2026 | Direct | ||
| Michael J. Running | PLXS | Common Stock, $.01 par value | Options Exercise | 84.6% | 1,096 | 2,391 | 17 Feb 2026 | Direct | ||
| Michael J. Running | PLXS | Performance Stock Units | Options Exercise | -100% | -1,096 | 0 | 17 Feb 2026 | Direct | ||
| Michael J. Running | PLXS | Performance Stock Units | Award | 42.3% | 326 | 1,096 | 17 Feb 2026 | Direct | ||
| Angelo Michael Ninivaggi Jr. | PLXS | Common Stock, $.01 par value | Tax liability | -6.59% | -1,540 | 21,834 | 17 Feb 2026 | Direct | ||
| Angelo Michael Ninivaggi Jr. | PLXS | Common Stock, $.01 par value | Options Exercise | 16.3% | 3,275 | 23,374 | 17 Feb 2026 | Direct | ||
| Angelo Michael Ninivaggi Jr. | PLXS | Performance Stock Units | Options Exercise | -100% | -3,275 | 0 | 17 Feb 2026 | Direct | ||
| Angelo Michael Ninivaggi Jr. | PLXS | Performance Stock Units | Award | 42.4% | 975 | 3,275 | 17 Feb 2026 | Direct | ||
| Oliver K. Mihm | PLXS | Common Stock, $.01 par value | Sale | -9.06% | $442,495 | $198.78 | -2,226 | 22,350 | 17 Feb 2026 | Direct |
| Oliver K. Mihm | PLXS | Common Stock, $.01 par value | Tax liability | -7.69% | -2,048 | 24,576 | 17 Feb 2026 | Direct | ||
| Oliver K. Mihm | PLXS | Common Stock, $.01 par value | Options Exercise | 19.6% | 4,357 | 26,624 | 17 Feb 2026 | Direct | ||
| Oliver K. Mihm | PLXS | Performance Stock Units | Options Exercise | -100% | -4,357 | 0 | 17 Feb 2026 | Direct | ||
| Oliver K. Mihm | PLXS | Performance Stock Units | Award | 42.4% | 1,297 | 4,357 | 17 Feb 2026 | Direct | ||
| Todd P. Kelsey | PLXS | Common Stock, $.01 par value | Tax liability | -9.04% | -8,802 | 88,522 | 17 Feb 2026 | Direct | ||
| Todd P. Kelsey | PLXS | Common Stock, $.01 par value | Options Exercise | 23.8% | 18,726 | 97,324 | 17 Feb 2026 | Direct | ||
| Todd P. Kelsey | PLXS | Performance Stock Units | Options Exercise | -100% | -18,726 | 0 | 17 Feb 2026 | Direct | ||
| Todd P. Kelsey | PLXS | Performance Stock Units | Award | 42.4% | 5,576 | 18,726 | 17 Feb 2026 | Direct | ||
| Patrick John Jermain | PLXS | Common Stock, $.01 par value | Tax liability | -13.1% | -2,638 | 17,534 | 17 Feb 2026 | Direct | ||
| Patrick John Jermain | PLXS | Common Stock, $.01 par value | Options Exercise | 38.5% | 5,611 | 20,172 | 17 Feb 2026 | Direct | ||
| Patrick John Jermain | PLXS | Performance Stock Units | Options Exercise | -100% | -5,611 | 0 | 17 Feb 2026 | Direct | ||
| Patrick John Jermain | PLXS | Performance Stock Units | Award | 42.4% | 1,671 | 5,611 | 17 Feb 2026 | Direct | ||
| Patrick John Jermain | PLXS | Common Stock, $.01 par value | Sale | -13.8% | $466,806 | $201.12 | -2,321 | 14,561 | 12 Feb 2026 | Direct |
| Frank Zycinski | PLXS | Common Stock, $.01 par value | Sale | -100% | $288,184 | $205.99 | -1,399 | 0 | 12 Feb 2026 | Direct |
| Jennifer Wuamett | PLXS | Restricted Stock Units | Award | 1,008 | 1,008 | 09 Feb 2026 | Direct | |||
| Michael Schrock V | PLXS | Restricted Stock Units | Award | 1,008 | 1,008 | 09 Feb 2026 | Direct | |||
| Paul A. Rooke | PLXS | Restricted Stock Units | Award | 1,008 | 1,008 | 09 Feb 2026 | Direct | |||
| Karen Marie Rapp | PLXS | Restricted Stock Units | Award | 1,008 | 1,008 | 09 Feb 2026 | Direct |
* marks a reported price that did not pass the local price check.