Comparable stake leader
Mitchell B. Goldsteen
SEC ownership of Shimmick Corp
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001887944.
Disclosed value leader
Mitchell B. Goldsteen
Comparable rows
50/50
Latest evidence
10 Aug 2026
- Public ticker
- SHIM on Nasdaq
- Parsed ownership sources
-
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Mitchell B. Goldsteen
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Mitchell B. Goldsteen
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
10 Aug 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001887944
- Issuer location
- Irvine, CA
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 Shimmick 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
Mitchell B. Goldsteen
Disclosed value leader
Mitchell B. Goldsteen
Comparable rows
50/50
Latest evidence
10 Aug 2026
13D/G
3/4/5
13F
Lead comparable stake: 58%
13D/G row: Mitchell B. Goldsteen
Showing 1-8 of 50 holder rows.
Quick read
Mitchell B. Goldsteen leads the comparable SEC ownership view at 58%.
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 Mitchell B. Goldsteen's linked filing trail.
Comparable ownership
Top 5
Mitchell B. Goldsteen
58%
AECOM
19%
Joseph A. del Guercio
0.54%
Geoffrey E. Heekin
0.51%
Peter Kravitz
0.45%
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 |
|---|---|---|---|---|---|
| Mitchell B. Goldsteen |
13D/G
3/4/5
Director, 10%+ Owner
|
58%
|
$82,011,753
20,974,873 shares
|
-$1,970,057 | 31 Mar 2026 |
| AECOM |
13D/G
3/4/5
10%+ Owner
|
19%
|
$29,121,200
7,745,000 shares
|
$0 | 10 Aug 2026 |
| Joseph A. del Guercio |
3/4/5
Director
|
0.54%
|
$824,193
224,576 shares
|
— | 02 Jun 2026 |
| Geoffrey E. Heekin |
3/4/5
Director
|
0.51%
|
$768,677
209,449 shares
|
— | 02 Jun 2026 |
| Peter Kravitz |
3/4/5
Director
|
0.45%
|
$807,661
184,940 shares
mixed-class rows
|
— | 02 Jun 2026 |
| J. Brendan Herron |
3/4/5
Director
|
0.38%
|
$264,822
155,778 shares
|
— | 04 Jun 2025 |
| Carolyn Trabuco |
3/4/5
Director
|
0.23%
|
$163,278
96,046 shares
|
— | 04 Jun 2025 |
| CANNELL CAPITAL LLC |
13F
Company
|
2.3%
|
$4,376,255
957,605 shares
|
— | 30 Jun 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: -$357,500.
Buys
$0
Insiders: 0
Sells
$357,500
Insiders: 1
Net
-$357,500
Shares: -125,000
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 125,000
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 125,000 | $0 | $357,500 | -$357,500 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-13 of 13 reporting-owner rows connected to Shimmick Corp. Open a relationship link for the CIK-to-CIK filing trail.
Rows
13
Largest Forms 3/4/5 holder
Mitchell B. Goldsteen
Net 12M change
-$357,500
Latest report
02 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Mitchell B. Goldsteen | Director, 10%+ Owner | $59,988,136 | -$357,500 | -0.59% | Filing P/S | 17 Mar 2026 |
| AECOM | 10%+ Owner | $11,849,850 | Mixed | 26 Jun 2024 | ||
| Ural Yal | Chief Executive Officer, Director | $1,297,457 | Mixed | 02 Dec 2025 | ||
| Executive Devin J. Nordhagen | Executive Vice President, Chief Financial Officer | $999,999 | Mixed | 13 Nov 2023 | ||
| Steven E. Richards | Chief Executive Officer, Director | $999,999 | Mixed | 13 Nov 2023 | ||
| Joseph A. del Guercio | Director | $824,193 | Mixed | 02 Jun 2026 | ||
| Peter Kravitz | Director | $807,661 | Mixed | 02 Jun 2026 | ||
| Geoffrey E. Heekin | Director | $768,677 | Mixed | 02 Jun 2026 | ||
| Todd W. Yoder | Chief Financial Officer | $350,554 | Mixed | 14 Apr 2026 | ||
| J. Brendan Herron | Director | $264,822 | Mixed | 04 Jun 2025 | ||
| Carolyn Trabuco | Director | $163,278 | Mixed | 04 Jun 2025 | ||
| Amanda Mobley | Interim Chief Financial Officer | $76,500 | Mixed | 21 Jun 2024 | ||
| Sarah Beth Tacker | Chief Operating Officer | $66,548 | Mixed | 29 May 2026 |
Recent insider transactions for Shimmick 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Geoffrey E. Heekin | SHIM | Common Stock, par value $0.01 per share | Options Exercise | 92.6% | 100,671 | 209,449 | 02 Jun 2026 | Direct | ||
| Geoffrey E. Heekin | SHIM | Restricted Stock Units | Options Exercise | -100% | -100,671 | 0 | 02 Jun 2026 | Direct | ||
| Geoffrey E. Heekin | SHIM | Restricted Stock Units | Award | 60,000 | 60,000 | 02 Jun 2026 | Direct | |||
| Peter Kravitz | SHIM | Common Stock, par value $0.01 per share | Options Exercise | 119.5% | 100,671 | 184,940 | 02 Jun 2026 | Direct | ||
| Peter Kravitz | SHIM | Restricted Stock Units | Options Exercise | -100% | -100,671 | 0 | 02 Jun 2026 | Direct | ||
| Peter Kravitz | SHIM | Restricted Stock Units | Award | 60,000 | 60,000 | 02 Jun 2026 | Direct | |||
| Joseph A. del Guercio | SHIM | Common Stock, par value $0.01 per share | Options Exercise | 81.2% | 100,671 | 224,576 | 02 Jun 2026 | Direct | ||
| Joseph A. del Guercio | SHIM | Restricted Stock Units | Options Exercise | -100% | -100,671 | 0 | 02 Jun 2026 | Direct | ||
| Joseph A. del Guercio | SHIM | Restricted Stock Units | Award | 44,000 | 44,000 | 02 Jun 2026 | Direct | |||
| Sarah Beth Tacker | SHIM | Common Stock, par value $0.01 per share | Tax liability | -31.8% | -8,463 | 18,133 | 29 May 2026 | Direct | ||
| Sarah Beth Tacker | SHIM | Common Stock, par value $0.01 per share | Options Exercise | 26,596 | 26,596 | 29 May 2026 | Direct | |||
| Sarah Beth Tacker | SHIM | Restricted Stock Units | Options Exercise | -23.1% | -26,596 | 88,652 | 29 May 2026 | Direct | ||
| Sarah Beth Tacker | SHIM | Restricted Stock Units | Award | 115,248 | 88,652 | 29 Apr 2026 | Direct | |||
| Todd W. Yoder | SHIM | Common Stock, par value $0.01 per share | Tax liability | -42.6% | -38,728 | 52,129 | 14 Apr 2026 | Direct | ||
| Todd W. Yoder | SHIM | Common Stock, par value $0.01 per share | Options Exercise | 132,247 | 111,912 | 14 Apr 2026 | Direct | |||
| Todd W. Yoder | SHIM | Restricted Stock Units | Options Exercise | -100% | -132,247 | 0 | 14 Apr 2026 | Direct | ||
| Mitchell B. Goldsteen | SHIM | Common Stock, par value $0.01 per share | Sale | -0.59% | $357,500 | $2.86 | -125,000 | 20,974,873 | 17 Mar 2026 | By GOHO, LLC |
| Ural Yal | SHIM | Common Stock, par value $0.01 per share | Options Exercise | 173,205 | 173,205 | 02 Dec 2025 | Direct | |||
| Ural Yal | SHIM | Restricted Stock Units | Options Exercise | -60% | -270,270 | 180,180 | 02 Dec 2025 | Direct |
* marks a reported price that did not pass the local price check.