Quick Takeaways
- IMOS - CHIPMOS TECHNOLOGIES INC has 11 insiders with reported activity on this page.
- No net insider buy/sell flow is currently reported for the last year.
- Recent transaction rows are available for direct filing-level review.
Insider Transactions Reported by 11 Insiders of CHIPMOS TECHNOLOGIES INC
- Symbol
- IMOS on Nasdaq
- Location
- Taiwan, Taiwan
What Changed
- No meaningful buy/sell imbalance is currently visible in the one-year window.
- Activity will update as new Forms 3/4/5 are filed.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Source Evidence
Filed on Form 4
See Original Filing
Issuer insider activity is sourced from SEC Forms 3, 4, and 5.
Insider trading overview
Last 12 monthsInsider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 14 May 2025.
Buys
$0
Shares: 0
Insiders: 0
Sells
$0
Shares: 0
Insiders: 0
Net
$0
Shares: 0
Insiders: 0
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 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 |
CHIPMOS TECHNOLOGIES INC executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Kun-Yi Chien | Director | Mixed | 13 Mar 2026 | |||
| Pao-Hsin Chang | Director | Mixed | 13 Mar 2026 | |||
| Yu-Chiao Su | Vice President, Director | Mixed | 13 Mar 2026 | |||
| Yeong-Her Wang | Director | Mixed | 13 Mar 2026 | |||
| Jyh-Chau Wang | Director | Mixed | 13 Mar 2026 | |||
| Yuh-Fong Tang | Director | Mixed | 13 Mar 2026 | |||
| Teng-Yueh Tsai | Executive Vice President | Mixed | 13 Mar 2026 | |||
| Hong-Tzer Yang | Director | Mixed | 13 Mar 2026 | |||
| Yuan-Feng Hsu | Executive Vice President | Mixed | 13 Mar 2026 | |||
| Lin Fu-Chen | Director | Mixed | 13 Mar 2026 | |||
| Shih Jye Cheng | President, Director | Mixed | 16 Mar 2026 |
Top shareholders of CHIPMOS TECHNOLOGIES INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| RENAISSANCE TECHNOLOGIES LLC |
13F
|
Company |
—
class O/S missing
|
1,125,190
|
$33,339,380 | — | 31 Dec 2025 | |
| ACADIAN ASSET MANAGEMENT LLC |
13F
|
Company |
—
class O/S missing
|
253,252
|
$7,497,000 | — | 31 Dec 2025 | |
| BlackRock, Inc. |
13F
|
Company |
—
class O/S missing
|
244,680
|
$7,249,877 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
—
class O/S missing
|
91,919
|
$2,726,682 | — | 31 Dec 2025 | |
| Vanguard Personalized Indexing Management, LLC |
13F
|
Company |
—
class O/S missing
|
73,380
|
$2,175,370 | — | 31 Dec 2025 | |
| Creative Planning |
13F
|
Company |
—
class O/S missing
|
41,876
|
$1,240,786 | — | 31 Dec 2025 | |
| RENAISSANCE GROUP LLC |
13F
|
Company |
—
class O/S missing
|
36,244
|
$1,073,937 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
—
class O/S missing
|
27,965
|
$828,603 | — | 31 Dec 2025 | |
| Parvin Asset Management, LLC |
13F
|
Company |
—
class O/S missing
|
22,245
|
$659,119 | — | 31 Dec 2025 | |
| Ballentine Partners, LLC |
13F
|
Company |
—
class O/S missing
|
21,521
|
$637,723 | — | 31 Dec 2025 | |
| RHUMBLINE ADVISERS |
13F
|
Company |
—
class O/S missing
|
21,247
|
$630,183 | — | 31 Dec 2025 | |
| SIGNATUREFD, LLC |
13F
|
Company |
—
class O/S missing
|
21,237
|
$629,252 | — | 31 Dec 2025 | |
| UBS Group AG |
13F
|
Company |
—
class O/S missing
|
18,368
|
$544,244 | — | 31 Dec 2025 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
—
class O/S missing
|
16,268
|
$482,509 | — | 31 Dec 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
—
class O/S missing
|
13,696
|
$405,812 | — | 31 Dec 2025 | |
| QUADRANT CAPITAL GROUP LLC |
13F
|
Company |
—
class O/S missing
|
13,132
|
$389,102 | — | 31 Dec 2025 | |
| LPL Financial LLC |
13F
|
Company |
—
class O/S missing
|
11,058
|
$327,649 | — | 31 Dec 2025 | |
| XY Capital Ltd |
13F
|
Company |
—
class O/S missing
|
10,596
|
$313,959 | — | 31 Dec 2025 | |
| RBF Capital, LLC |
13F
|
Company |
—
class O/S missing
|
8,965
|
$265,633 | — | 31 Dec 2025 | |
| Connor, Clark & Lunn Investment Management Ltd. |
13F
|
Company |
—
class O/S missing
|
8,779
|
$260,122 | — | 31 Dec 2025 | |
| Parallel Advisors, LLC |
13F
|
Company |
—
class O/S missing
|
6,280
|
$186,076 | — | 31 Dec 2025 | |
| LSV ASSET MANAGEMENT |
13F
|
Company |
—
class O/S missing
|
5,600
|
$166,000 | — | 31 Dec 2025 | |
| GAMMA Investing LLC |
13F
|
Company |
—
class O/S missing
|
3,276
|
$97,068 | — | 31 Dec 2025 | |
| Westside Investment Management, Inc. |
13F
|
Company |
—
class O/S missing
|
2,163
|
$66,047 | — | 31 Dec 2025 | |
| Arax Advisory Partners |
13F
|
Company |
—
class O/S missing
|
2,151
|
$63,734 | — | 31 Dec 2025 | |
| Smartleaf Asset Management LLC |
13F
|
Company |
—
class O/S missing
|
1,774
|
$54,057 | — | 31 Dec 2025 | |
| Allworth Financial LP |
13F
|
Company |
—
class O/S missing
|
1,546
|
$45,808 | — | 31 Dec 2025 | |
| Bell Investment Advisors, Inc |
13F
|
Company |
—
class O/S missing
|
1,399
|
$41,453 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
—
class O/S missing
|
1,219
|
$36,125 | — | 31 Dec 2025 | |
| Farther Finance Advisors, LLC |
13F
|
Company |
—
class O/S missing
|
1,185
|
$35,112 | — | 31 Dec 2025 | |
| JNBA Financial Advisors |
13F
|
Company |
—
class O/S missing
|
1,000
|
$29,630 | — | 31 Dec 2025 | |
| Global Retirement Partners, LLC |
13F
|
Company |
—
class O/S missing
|
998
|
$29,571 | — | 31 Dec 2025 | |
| US BANCORP \DE\ |
13F
|
Company |
—
class O/S missing
|
748
|
$22,163 | — | 31 Dec 2025 | |
| ASSETMARK, INC |
13F
|
Company |
—
class O/S missing
|
584
|
$17,304 | — | 31 Dec 2025 | |
| Physician Wealth Advisors, Inc. |
13F
|
Company |
—
class O/S missing
|
473
|
$14,015 | — | 31 Dec 2025 | |
| NISA INVESTMENT ADVISORS, LLC |
13F
|
Company |
—
class O/S missing
|
433
|
$12,843 | — | 31 Dec 2025 | |
| ROYAL BANK OF CANADA |
13F
|
Company |
—
class O/S missing
|
377
|
$11,000 | — | 31 Dec 2025 | |
| NewEdge Advisors, LLC |
13F
|
Company |
—
class O/S missing
|
303
|
$8,978 | — | 31 Dec 2025 | |
| EverSource Wealth Advisors, LLC |
13F
|
Company |
—
class O/S missing
|
285
|
$8,444 | — | 31 Dec 2025 | |
| BESSEMER GROUP INC |
13F
|
Company |
—
class O/S missing
|
279
|
$8,000 | — | 31 Dec 2025 | |
| Federation Des Caisses Desjardins du Quebec |
13F
|
Individual |
—
class O/S missing
|
264
|
$7,821 | — | 31 Dec 2025 | |
| OSAIC HOLDINGS, INC. |
13F
|
Company |
—
class O/S missing
|
238
|
$7,052 | — | 31 Dec 2025 | |
| Coston, McIsaac & Partners |
13F
|
Company |
—
class O/S missing
|
217
|
$6,000 | — | 31 Dec 2025 | |
| Larson Financial Group LLC |
13F
|
Company |
—
class O/S missing
|
192
|
$5,689 | — | 31 Dec 2025 | |
| Crewe Advisors LLC |
13F
|
Company |
—
class O/S missing
|
113
|
$3,349 | — | 31 Dec 2025 | |
| CWM, LLC |
13F
|
Company |
—
class O/S missing
|
100
|
$3,000 | — | 31 Dec 2025 | |
| PRIVATE TRUST CO NA |
13F
|
Company |
—
class O/S missing
|
95
|
$2,815 | — | 31 Dec 2025 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
—
class O/S missing
|
80
|
$2,373 | — | 31 Dec 2025 | |
| SBI Securities Co., Ltd. |
13F
|
Company |
—
class O/S missing
|
63
|
$1,867 | — | 31 Dec 2025 | |
| Winch Advisory Services, LLC |
13F
|
Company |
—
class O/S missing
|
60
|
$1,778 | — | 31 Dec 2025 |
Recent Insider Transactions by Companies or Individuals for CHIPMOS TECHNOLOGIES INC
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Shih Jye Cheng | IMOS | Common Stock | 0 | 1,000,000 | 16 Mar 2026 | By Spouse | ||||
| Shih Jye Cheng | IMOS | Common Stock | 0 | 6,244,777 | 16 Mar 2026 | By Hao Hsiang Investment Co., Ltd. | ||||
| Shih Jye Cheng | IMOS | Common Stock | 0 | 5,160,161 | 16 Mar 2026 | Direct | ||||
| Yuan-Feng Hsu | IMOS | Common Stock | 0 | 230,130 | 13 Mar 2026 | Direct | ||||
| Teng-Yueh Tsai | IMOS | Common Stock | 0 | 820,000 | 13 Mar 2026 | Yung Hsiang Investment Co., Ltd. | ||||
| Teng-Yueh Tsai | IMOS | Common Stock | 0 | 272,572 | 13 Mar 2026 | Direct | ||||
| Yu-Chiao Su | IMOS | Common Stock | 0 | 830,000 | 13 Mar 2026 | Tsai Fu Investment Co., Ltd. | ||||
| Yu-Chiao Su | IMOS | Common Stock | 0 | 346,101 | 13 Mar 2026 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.