$IMOS

$60.44 +$2.93 (5.09%) Close

$IMOS Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 700.0M shares outstanding

Who owns IMOS?

By type of holder

Institutions 0.4% Insiders 2.1% Everyone else 97.5%

Concentration Top 10 holders own 2.4%

Cheng Shih Jye 1.8% · Su Yu-Chiao 0.2%

Institutional ownership

0.4%

+0.1 pts vs last qtr

Institutional holders

+18 vs last qtr

Net shares bought

+398.5K

by institutions in Q2 2026

New / sold out

28 / 10

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

XY Capital Ltd NEW +130.3K
O'Shaughnessy Asset Management, LLC +92.7K

Biggest sellers in Q2 2026

Acadian Asset Management LLC −28.5K
Parvin Asset Management, LLC SOLD OUT −21.8K

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for ChipMOS Technologies Inc in the last 12 months.

Is your stake being diluted?

There are not yet two fiscal years of reported share counts for ChipMOS Technologies Inc.

How patient are the owners?

Institutional shares by how long they've been held

5+ years66% 3–5 years3% 1–3 years3% Under 1 year28%

Quarterly turnover

13.4%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting IMOS on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
RT Renaissance Technologies LLC	1.1M	0.16%	−12.1K (−1.1%)	≤2021	0.1%
Shares held by quarter Peak holding1.2M (Q3'24) Change over 8 quarters−114.7K Share of the company0.160% Renaissance Technologies LLC's full portfolio →
B BlackRock, Inc.	255.5K	0.04%	+1.1K (+0.4%)	≤2021	0.0%
Shares held by quarter Peak holding255.5K (Q2'26) Change over 8 quarters+45.5K Share of the company0.040% BlackRock, Inc.'s full portfolio →

Renaissance Technologies LLC

1.1M

% of company

0.16%

Change vs last qtr

−12.1K (−1.1%)

Held since

≤2021

BlackRock, Inc.

255.5K

% of company

0.04%

Change vs last qtr

+1.1K (+0.4%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding ChipMOS Technologies Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting IMOS on Form N-PORT; together they hold 0.0% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
EM Emerging Markets Core Equity 2 Portfolio Dfa Investment Dimensions Group Inc	$2.88M	60.7K	0.01%	0.01%	July 31, 2026
DE Dimensional Emerging Markets Value Fund Dimensional Emerging Markets Value Fund	$543K	11.5K	0.00%	0.00%	July 31, 2026

Emerging Markets Core Equity 2 Portfolio

Dfa Investment Dimensions Group Inc

Position value

$2.88M

% of company

0.01%

% of the fund

0.01%

As of

July 31, 2026

Dimensional Emerging Markets Value Fund

Position value

$543K

% of company

0.00%

% of the fund

0.00%

As of

July 31, 2026

13 more funds behind a free account

See every fund holding ChipMOS Technologies Inc and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
CS Cheng Shih Jye Insider	12.4M	1.77%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company1.770% Cheng Shih Jye's insider activity →
SY Su Yu-Chiao Insider	1.2M	0.17%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.170% Su Yu-Chiao's insider activity →

Cheng Shih Jye

Insider

12.4M

% of company

1.77%

Change vs last qtr

—

Held since

—

Su Yu-Chiao

Insider

1.2M

% of company

0.17%

Change vs last qtr

—

Held since

—

2 more holders behind a free account

See every insider and 5%+ holder of ChipMOS Technologies Inc.

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