Comparable stake leader
Laurence W. Lytton
SEC ownership of EMCORE CORP
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000808326.
Disclosed value leader
AWM Investment Company, Inc.
Comparable rows
1/15
Latest evidence
28 Feb 2025
- Parsed ownership sources
- 13D/G and 3/4/5
- Largest SEC-reported holder
- Laurence W. Lytton
- Latest 13D/G holder
- Laurence W. Lytton
- Latest parsed ownership date
- 28 Feb 2025
- Issuer CIK
- 0000808326
- Issuer location
- Alhambra, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of EMCORE 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
Laurence W. Lytton
Disclosed value leader
AWM Investment Company, Inc.
Comparable rows
1/15
Latest evidence
28 Feb 2025
13D/G
3/4/5
Lead comparable stake: 1.4%
14 rows are not safely comparable across share classes.
13D/G row: Laurence W. Lytton
Showing 1-8 of 15 holder rows.
Quick read
Laurence W. Lytton leads the comparable SEC ownership view at 1.4%.
1 of 15 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 Laurence W. Lytton's linked filing trail.
Comparable ownership
Top 1
Laurence W. Lytton
1.4%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Laurence W. Lytton |
13D/G
LYTTON LAURENCE W
|
1.4%
|
$394,948
126,948 shares
|
$0 | 31 Dec 2024 |
| AWM Investment Company, Inc. |
3/4/5
10%+ Owner
|
—
class O/S missing
|
$2,157,541
5,262,296 shares
|
— | 15 Jun 2023 |
| Vikas Chopra |
3/4/5
10%+ Owner
|
—
class O/S missing
|
$911,566
978,600 shares
|
— | 13 Aug 2024 |
| Jeffrey Rittichier |
3/4/5
Chief Executive Officer, Director
|
—
mixed-class rows
|
$360,912
1,945,180 shares
mixed-class rows
|
— | 23 Mar 2024 |
| Stephen L. Domenik |
3/4/5
Director
|
—
class O/S missing
|
$93,135
227,159 shares
|
— | 03 Oct 2022 |
| Iain Black |
3/4/5
SVP, Operations
|
—
mixed-class rows
|
$78,131
379,937 shares
mixed-class rows
|
— | 21 Dec 2023 |
| Albert Lu |
3/4/5
SVP & GM, Aerospace & Defense
|
—
mixed-class rows
|
$29,711
293,600 shares
mixed-class rows
|
— | 25 Apr 2022 |
| Matthew Vargas |
3/4/5
Interim CEO, Director
|
—
class O/S missing
|
—
218,822 shares
|
— | 28 Feb 2025 |
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
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 10 Jun 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-15 of 15 reporting-owner rows connected to EMCORE CORP. Open a relationship link for the CIK-to-CIK filing trail.
Rows
15
Largest Forms 3/4/5 holder
AWM Investment Company, Inc.
Net 12M change
$0
Latest report
28 Feb 2025
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| AWM Investment Company, Inc. | 10%+ Owner | $2,157,541 | Mixed | 15 Jun 2023 | ||
| Vikas Chopra | 10%+ Owner | $911,566 | Mixed | 13 Aug 2024 | ||
| Jeffrey Rittichier | Chief Executive Officer, Director | $360,912 | Mixed | 23 Mar 2024 | ||
| Stephen L. Domenik | Director | $93,135 | Mixed | 03 Oct 2022 | ||
| Iain Black | SVP, Operations | $78,131 | Mixed | 21 Dec 2023 | ||
| Albert Lu | SVP & GM, Aerospace & Defense | $29,711 | Mixed | 25 Apr 2022 | ||
| David Rogers | Director | $0 | Mixed | 28 Feb 2025 | ||
| Archon Capital Management LLC | 10%+ Owner | $0 | Mixed | 09 May 2024 | ||
| Matthew Vargas | Interim CEO, Director | $0 | Mixed | 28 Feb 2025 | ||
| Thomas P. Minichiello | Chief Financial Officer | $0 | Mixed | 28 Feb 2025 | ||
| Jeffrey J. Roncka | Director | $0 | Mixed | 28 Feb 2025 | ||
| Bruce Grooms | Director | $0 | Mixed | 28 Feb 2025 | ||
| Cletus C. Glasener | Director | $0 | Mixed | 28 Feb 2025 | ||
| Rex S. Jackson | Director | Mixed | 09 Apr 2024 | |||
| Noel Heiks | Director | Mixed | 09 Apr 2024 |
Recent insider transactions for EMCORE 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| No insider transactions were found in the last 12 months for this issuer. | ||||||||||
* marks a reported price that did not pass the local price check.