Comparable stake leader
SBI Securities Co., Ltd.
SEC ownership of GIGAMEDIA Ltd
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001105101.
Disclosed value leader
SBI Securities Co., Ltd.
Comparable rows
0/2
Latest evidence
30 Jun 2026
- Public ticker
- GIGM on Nasdaq
- Parsed ownership sources
-
13F and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
SBI Securities Co., Ltd.
Ranking: Comparable ownership first, then disclosed value
- Latest parsed ownership date
-
30 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001105101
- Issuer location
- Taipei, Taiwan
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 GIGAMEDIA Ltd (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
SBI Securities Co., Ltd.
Disclosed value leader
SBI Securities Co., Ltd.
Comparable rows
0/2
Latest evidence
30 Jun 2026
13F
3/4/5
Highest disclosed value: $527
2 rows are not safely comparable across share classes.
Quick read
SBI Securities Co., Ltd. has the largest disclosed position value at $527.
0 of 2 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 SBI Securities Co., Ltd.'s linked filing trail.
Disclosed position value
Top 1
SBI Securities Co., Ltd.
$527
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-2 of 2 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| SBI Securities Co., Ltd. |
13F
Company
|
—
class O/S missing
|
$527
350 shares
|
— | 30 Jun 2026 |
| Huang Cheng-Ming |
3/4/5
CEO & CFO, Director
|
—
class O/S missing
|
—
1,073,566 shares
|
— | 18 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
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 16 Aug 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 1-7 of 7 reporting-owner rows connected to GIGAMEDIA Ltd. Open a relationship link for the CIK-to-CIK filing trail.
Rows
7
Largest Forms 3/4/5 holder
Lin Wan-Wan
Net 12M change
$0
Latest report
18 Mar 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Lin Wan-Wan | Director | Mixed | 18 Mar 2026 | |||
| Tsai Chih-Hong | Director | Mixed | 18 Mar 2026 | |||
| Liao Ying-Chih | Director | Mixed | 18 Mar 2026 | |||
| Liu Nick Chia-En | Director | Mixed | 18 Mar 2026 | |||
| Huang Ping Chang John | Director | Mixed | 18 Mar 2026 | |||
| Hong Chin Fock | Director | Mixed | 18 Mar 2026 | |||
| Huang Cheng-Ming | CEO & CFO, Director | Mixed | 18 Mar 2026 |
Recent insider transactions for GIGAMEDIA Ltd
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Huang Cheng-Ming | GIGM | Ordinary Shares | 0 | 1,073,566 | 18 Mar 2026 | By Pacific Star Universal Group Ltd |
* marks a reported price that did not pass the local price check.