Comparable stake leader
Russell Kern
SEC ownership of International Stem Cell CORP
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001355790.
Disclosed value leader
—
Comparable rows
0/5
Latest evidence
16 Sep 2026
- Public ticker
- ISCO on OTC
- Parsed ownership sources
-
3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Russell Kern
Ranking: Comparable ownership first, then disclosed value
- Latest parsed ownership date
-
16 Sep 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001355790
- Issuer location
- San Diego, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
1 signal
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of International Stem Cell 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
Russell Kern
Disclosed value leader
—
Comparable rows
0/5
Latest evidence
16 Sep 2026
3/4/5
Some rows are evidence-backed but not safely comparable across classes.
5 rows are not safely comparable across share classes.
Quick read
SEC ownership evidence is available, but the rows are not safely comparable across share classes.
0 of 5 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 Russell Kern's linked filing trail.
Detailed SEC evidence table Showing 1-5 of 5 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Russell Kern |
3/4/5
EVP and CSO, Director, 10%+ Owner
|
—
class O/S missing
|
—
2,000,000 shares
|
— | 06 Nov 2023 |
| Andrey Semechkin |
3/4/5
Chief Executive Officer, Director, 10%+ Owner
|
—
class O/S missing
|
—
500,000 shares
|
— | 06 Nov 2023 |
| Sophia Garnette |
3/4/5
VP, Legal Affairs & Operations
|
—
class O/S missing
|
—
250,000 shares
|
— | 09 Jun 2021 |
| Paul Maier V |
3/4/5
Director
|
—
class O/S missing
|
—
182,584 shares
|
-$10,497 | 16 Sep 2026 |
| Wright Don |
3/4/5
Director
|
—
class O/S missing
|
—
182,584 shares
|
— | 11 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: -$10,497.
Buys
$0
Insiders: 0
Sells
$10,497
Insiders: 1
Net
-$10,497
Shares: -32,802
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 32,802
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 32,802 | $0 | $10,497 | -$10,497 |
| 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 1-5 of 5 reporting-owner rows connected to International Stem Cell CORP. Open a relationship link for the CIK-to-CIK filing trail.
Rows
5
Largest Forms 3/4/5 holder
Paul Maier V
Net 12M change
-$10,497
Latest report
16 Sep 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Paul Maier V | Director | $0 | -$10,497 | -100% | Mixed | 16 Sep 2026 |
| Russell Kern | EVP and CSO, Director, 10%+ Owner | Mixed | 06 Nov 2023 | |||
| Sophia Garnette | VP, Legal Affairs & Operations | Mixed | 09 Jun 2021 | |||
| Andrey Semechkin | Chief Executive Officer, Director, 10%+ Owner | Mixed | 06 Nov 2023 | |||
| Wright Don | Director | Mixed | 11 Jun 2026 |
Recent insider transactions for International Stem Cell 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Paul Maier V | ISCO | Stock Options | Disposed to Issuer | -100% | -30,000 | 0 | 16 Sep 2026 | Direct | ||
| Paul V Maier | ISCO | Common Stock | Sale | -100% | $10,497 | $0.3200 | -32,802 | 0 | 11 Sep 2026 | Through family Trust dated 4/21/2000 |
| Wright Don | ISCO | Stock Option (Right to Buy) | Award | 212,584 | 182,584 | 11 Jun 2026 | Direct | |||
| Paul Maier V | ISCO | Stock Option (Right to Buy) | Award | 212,584 | 182,584 | 11 Jun 2026 | Direct |
* marks a reported price that did not pass the local price check.