GIGM SEC Filing News — GigaMedia Limited

Latest SEC filings for GigaMedia Limited (GIGM) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2020-09-25.

GigaMedia Limited, together with its subsidiaries, provides digital entertainment services in Taiwan, Hong Kong, and Macau. The company owns and operates FunTown, a digital entertainment portal that offers mobile and browser-based casual games, as well as provides services, such as player clubs, tournaments, avatars, friends and family messenger and online chatting systems, customer service, mobile platform, and customer platform. It also offers MahJong, a traditional Chinese tile-based game; ca…
Sector: Communication Services Industry: Electronic Gaming & Multimedia Market Cap: $14.0M
20
Total Filings
20
Bullish Classifications
0
Bearish Classifications
20
Insider Transactions
0
Material Events (8-K)
0
Periodic Reports
Rule-based classifications for GIGM currently lean bullish. Of the 20 displayed SEC filing records, 20 carry bullish classifications versus 0 bearish classifications. These labels summarize filing attributes; they are not recommendations, probabilities, or evidence of future price direction. There were 20 insider transactions (Form 4) in this period.
GIGM Filing Activity Snapshot 2014-11-20 — 2020-09-25
Insider Transactions (Form 4)
20 buys vs 0 sells
Net insider buying in this period — more purchases than sales reported.
Largest Form 144 Filing
$498.4K
Hwang Collin (Director) · 2014-11-20
496,938 shares · Form 4
Insider Transactions 20 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 20 filings in this group are Form 4s for GigaMedia Limited.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 20 insider filings shown, the breakdown is 20 open-market purchase. 20 of them involved a discretionary open-market trade; the rest are compensation and administrative mechanics.

What each transaction type means

Open-market purchase ×20
The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.
Form 4 Open-market purchase Insider Buying 2020-09-25

GIGM insider Huang Cheng-Ming (Director, CEO) bought 21,570 shares (~$62.3K)

Huang Cheng-Ming, listed as Director, CEO at GIGAMEDIA Ltd, reported an open-market purchase of 21,570 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 15,787 $2.88 $45.5K
P Open-market purchase 5,783 $2.91 $16.8K
Filing: Form 4 (Insider Transaction) Insider: Huang Cheng-Ming (Director, CEO) Shares: 21,570 Est. Value: $62.3K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market purchase Insider Buying 2020-09-10

GIGM insider Huang Cheng-Ming (Director, CEO) bought 68,737 shares (~$197.0K)

Huang Cheng-Ming, listed as Director, CEO at GIGAMEDIA Ltd, reported an open-market purchase of 68,737 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 11,267 $2.70 $30.4K
P Open-market purchase 50,000 $2.90 $144.9K
P Open-market purchase 7,470 $2.91 $21.8K
Filing: Form 4 (Insider Transaction) Insider: Huang Cheng-Ming (Director, CEO) Shares: 68,737 Est. Value: $197.0K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market purchase Insider Buying 2020-05-20

GIGM insider Huang Cheng-Ming (Director, CEO) bought 110,190 shares (~$270.2K)

Huang Cheng-Ming, listed as Director, CEO at GIGAMEDIA Ltd, reported an open-market purchase of 110,190 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 10,190 $2.30 $23.5K
P Open-market purchase 60,000 $2.45 $146.9K
P Open-market purchase 40,000 $2.49 $99.8K
Filing: Form 4 (Insider Transaction) Insider: Huang Cheng-Ming (Director, CEO) Shares: 110,190 Est. Value: $270.2K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market purchase Insider Buying 2019-08-20

GIGM insider Huang Cheng-Ming (Director, CEO) bought 69,742 shares (~$164.1K)

Huang Cheng-Ming, listed as Director, CEO at GIGAMEDIA Ltd, reported an open-market purchase of 69,742 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 60,000 $2.34 $140.7K
P Open-market purchase 9,742 $2.40 $23.4K
Filing: Form 4 (Insider Transaction) Insider: Huang Cheng-Ming (Director, CEO) Shares: 69,742 Est. Value: $164.1K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market purchase Insider Buying 2019-06-24

GIGM insider Huang Cheng-Ming (Director, CEO) bought 67,829 shares (~$169.7K)

Huang Cheng-Ming, listed as Director, CEO at GIGAMEDIA Ltd, reported an open-market purchase of 67,829 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 57,885 $2.50 $144.6K
P Open-market purchase 9,944 $2.52 $25.1K
Filing: Form 4 (Insider Transaction) Insider: Huang Cheng-Ming (Director, CEO) Shares: 67,829 Est. Value: $169.7K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market purchase Insider Buying 2019-06-17

GIGM insider Huang Cheng-Ming (Director, CEO) bought 35,432 shares (~$86.2K)

Huang Cheng-Ming, listed as Director, CEO at GIGAMEDIA Ltd, reported an open-market purchase of 35,432 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 25,484 $2.39 $61.0K
P Open-market purchase 3,800 $2.50 $9.5K
P Open-market purchase 6,148 $2.55 $15.7K
Filing: Form 4 (Insider Transaction) Insider: Huang Cheng-Ming (Director, CEO) Shares: 35,432 Est. Value: $86.2K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market purchase Insider Buying 2018-12-26

GIGM insider Huang Cheng-Ming (Director, CEO) bought 150,000 shares (~$419.4K)

Huang Cheng-Ming, listed as Director, CEO at GIGAMEDIA Ltd, reported an open-market purchase of 150,000 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 80,000 $2.69 $215.4K
P Open-market purchase 70,000 $2.91 $204.0K
Filing: Form 4 (Insider Transaction) Insider: Huang Cheng-Ming (Director, CEO) Shares: 150,000 Est. Value: $419.4K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market purchase Insider Buying 2018-09-18

GIGM insider Huang Cheng-Ming (Director, CEO) bought 69,967 shares (~$209.4K)

Huang Cheng-Ming, listed as Director, CEO at GIGAMEDIA Ltd, reported an open-market purchase of 69,967 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 6,084 $2.93 $17.8K
P Open-market purchase 63,883 $3.00 $191.6K
Filing: Form 4 (Insider Transaction) Insider: Huang Cheng-Ming (Director, CEO) Shares: 69,967 Est. Value: $209.4K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market purchase Insider Buying 2018-08-17

GIGM insider Huang Cheng-Ming (Director, CEO) bought 111,387 shares (~$329.0K)

Huang Cheng-Ming, listed as Director, CEO at GIGAMEDIA Ltd, reported an open-market purchase of 111,387 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 60,000 $2.89 $173.2K
P Open-market purchase 1,387 $2.92 $4.1K
P Open-market purchase 50,000 $3.04 $151.8K
Filing: Form 4 (Insider Transaction) Insider: Huang Cheng-Ming (Director, CEO) Shares: 111,387 Est. Value: $329.0K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market purchase Insider Buying 2018-06-06

GIGM insider Huang Cheng-Ming (Director, CEO) bought 31,901 shares (~$98.9K)

Huang Cheng-Ming, listed as Director, CEO at GIGAMEDIA Ltd, reported an open-market purchase of 31,901 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 12,964 $2.98 $38.7K
P Open-market purchase 18,937 $3.18 $60.3K
Filing: Form 4 (Insider Transaction) Insider: Huang Cheng-Ming (Director, CEO) Shares: 31,901 Est. Value: $98.9K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market purchase Insider Buying 2017-12-21

GIGM insider Huang Cheng-Ming (Director, CEO) bought 44,133 shares (~$132.7K)

Huang Cheng-Ming, listed as Director, CEO at GIGAMEDIA Ltd, reported an open-market purchase of 44,133 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 35,042 $3.00 $105.1K
P Open-market purchase 9,091 $3.03 $27.5K
Filing: Form 4 (Insider Transaction) Insider: Huang Cheng-Ming (Director, CEO) Shares: 44,133 Est. Value: $132.7K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market purchase Insider Buying 2017-12-08

GIGM insider Huang Cheng-Ming (Director, CEO) bought 55,070 shares (~$161.8K)

Huang Cheng-Ming, listed as Director, CEO at GIGAMEDIA Ltd, reported an open-market purchase of 55,070 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 55,070 $2.94 $161.8K
Filing: Form 4 (Insider Transaction) Insider: Huang Cheng-Ming (Director, CEO) Shares: 55,070 Est. Value: $161.8K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market purchase Insider Buying 2017-09-20

GIGM insider Huang Cheng-Ming (Director, CEO) bought 100,000 shares (~$299.1K)

Huang Cheng-Ming, listed as Director, CEO at GIGAMEDIA Ltd, reported an open-market purchase of 100,000 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 50,000 $2.98 $149.1K
P Open-market purchase 50,000 $3.00 $150.0K
Filing: Form 4 (Insider Transaction) Insider: Huang Cheng-Ming (Director, CEO) Shares: 100,000 Est. Value: $299.1K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market purchase Insider Buying 2017-08-23

GIGM insider Huang Cheng-Ming (Director, CEO) bought 100,000 shares (~$294.3K)

Huang Cheng-Ming, listed as Director, CEO at GIGAMEDIA Ltd, reported an open-market purchase of 100,000 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 100,000 $2.94 $294.3K
Filing: Form 4 (Insider Transaction) Insider: Huang Cheng-Ming (Director, CEO) Shares: 100,000 Est. Value: $294.3K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market purchase Insider Buying 2017-08-09

GIGM insider Huang Cheng-Ming (Director, CEO) bought 37,608 shares (~$112.3K)

Huang Cheng-Ming, listed as Director, CEO at GIGAMEDIA Ltd, reported an open-market purchase of 37,608 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 37,608 $2.99 $112.3K
Filing: Form 4 (Insider Transaction) Insider: Huang Cheng-Ming (Director, CEO) Shares: 37,608 Est. Value: $112.3K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market purchase Insider Buying 2016-12-20

GIGM insider Hwang Collin (Director, Chief Executive Officer) bought 39,000 shares (~$108.0K)

Hwang Collin, listed as Director, Chief Executive Officer at GIGAMEDIA Ltd, reported an open-market purchase of 39,000 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 39,000 $2.77 $108.0K
Filing: Form 4 (Insider Transaction) Insider: Hwang Collin (Director, Chief Executive Officer) Shares: 39,000 Est. Value: $108.0K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market purchase Insider Buying 2015-12-28

GIGM insider Hwang Collin (Director, Chief Executive Officer) bought 87,799 shares (~$260.2K)

Hwang Collin, listed as Director, Chief Executive Officer at GIGAMEDIA Ltd, reported an open-market purchase of 87,799 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 87,799 $2.96 $260.2K
Filing: Form 4 (Insider Transaction) Insider: Hwang Collin (Director, Chief Executive Officer) Shares: 87,799 Est. Value: $260.2K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market purchase Insider Buying 2015-12-24

GIGM insider Hwang Collin (Director, Chief Executive Officer) bought 85,724 shares (~$257.2K)

Hwang Collin, listed as Director, Chief Executive Officer at GIGAMEDIA Ltd, reported an open-market purchase of 85,724 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 31,263 $3.00 $93.8K
P Open-market purchase 26,338 $3.00 $79.0K
P Open-market purchase 28,123 $3.00 $84.4K
Filing: Form 4 (Insider Transaction) Insider: Hwang Collin (Director, Chief Executive Officer) Shares: 85,724 Est. Value: $257.2K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market purchase Insider Buying 2015-11-16

GIGM insider Hwang Collin (Director, Chief Executive Officer) bought 858,412 shares (~$498.1K)

Hwang Collin, listed as Director, Chief Executive Officer at GIGAMEDIA Ltd, reported an open-market purchase of 858,412 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 118,490 $0.56 $66.4K
P Open-market purchase 251,992 $0.58 $146.2K
P Open-market purchase 89,387 $0.58 $52.1K
P Open-market purchase 30,477 $0.58 $17.6K
P Open-market purchase 100,000 $0.58 $58.0K
P Open-market purchase 53,754 $0.58 $31.2K
P Open-market purchase 100,000 $0.58 $58.0K
P Open-market purchase 112,712 $0.60 $67.6K
P Open-market purchase 1,000 $0.60 $599.80
P Open-market purchase 400 $0.60 $239.72
P Open-market purchase 200 $0.59 $118.00
Filing: Form 4 (Insider Transaction) Insider: Hwang Collin (Director, Chief Executive Officer) Shares: 858,412 Est. Value: $498.1K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market purchase Insider Buying 2014-11-20

GIGM insider Hwang Collin (Director) bought 496,938 shares (~$498.4K)

Hwang Collin, listed as Director at GIGAMEDIA Ltd, reported an open-market purchase of 496,938 GIGM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code Nature Shares Price Value
P Open-market purchase 365,000 $0.99 $362.4K
P Open-market purchase 18,227 $0.99 $18.0K
P Open-market purchase 50,000 $1.05 $52.5K
P Open-market purchase 63,711 $1.03 $65.6K
Filing: Form 4 (Insider Transaction) Insider: Hwang Collin (Director) Shares: 496,938 Est. Value: $498.4K
View on SEC EDGAR → Open Filing Document →

How we classify GigaMedia Limited's filings

Straight from EDGAR

Each displayed record links to an original source document. StrongBuyAnalytics provides navigation and brief excerpts or summaries, not the filing itself. Parsing may omit context or contain errors, so read the original document in full.

Transaction codes, not guesswork

The nature shown on each insider filing comes from the transaction code the filer entered on the form itself — P for an open-market purchase, A for a compensation award, F for shares withheld to pay tax, M for an option exercise. Where one filing contains several codes, the transaction table lists them line by line.

Why the distinction matters

Insider activity is routinely summarised as buying or selling, which flattens together decisions that mean very different things. Shares withheld for tax on a vesting grant are an automatic administrative step; shares bought on the open market are someone committing their own money at the current price.

What this page does not tell you

A filing records what happened, not why. Form 4 does not always disclose whether a sale was executed under a pre-arranged Rule 10b5-1 plan, and no single filing is a basis for a decision on GIGM. Read these alongside the fundamentals rather than in isolation.

Frequently Asked Questions — GIGM SEC Filings

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Publisher, sources & limitations — September 15, 2026. StrongBuyAnalytics provides navigation and brief excerpts or summaries for educational use. Original filings remain at SEC EDGAR or other displayed source links; StrongBuyAnalytics does not author them. Filing dates are source dates, not publication dates for this page. Coverage can be delayed, incomplete, amended, or unavailable because of SEC/source availability, parsing, caching, or outages. Verify every material statement in the original filing.
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