76 institutional investment managers reported MX positions in their Form 13F filings for Q2 2026, holding 15,640,900 shares worth $73.9M in total. Marshall Wace, LLP reported the largest position.

Are funds buying or selling MX?

In Q2 2026, 24 managers opened new MX positions, 23 added, 23 trimmed and 17 sold out. Managers that filed in both quarters sold a net 3,246,746 shares.

How current is this MX institutional ownership data?

It covers holdings as of the end of Q2 2026. Managers have 45 days after the quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.

Funds · MX

Who owns MX?

Institutional ownership of Magnachip Semiconductor Corporation from Form 13F, Q2 2026

76 institutional managers reported holding Magnachip Semiconductor Corporation (MX) in Form 13F filings for Q2 2026, with 15,640,900 shares worth $73.9M. The largest reported holder was Marshall Wace, LLP. Managers that filed both quarters cut a net 3,246,746 shares (-17.2%). 24 opened new positions and 17 sold out.

Funds holding: 76
Value held: $73.9M
New / sold out: 24 / 17
Net shares, same filers: -17.2%

Holdings as of June 30, 2026, the end of Q2 2026. Managers have 45 days after a quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.

Largest holders of MX

Fund	Value	Share of 13F holdings	Shares	Move
Marshall Wace, LLP	$7.6M	10.3%	1,615,488	Added
FourWorld Capital Management LLC	$7.6M	10.2%	1,600,695	Trimmed
Two Sigma Investments, LP	$7.1M	9.6%	1,501,438	Added
Oaktree Capital Management LP	$7.1M	9.6%	1,500,000	Trimmed
D. E. Shaw & Co., Inc.	$6.6M	8.9%	1,397,759	Added
Acadian Asset Management LLC	$4.5M	6.2%	963,768	Added
Renaissance Technologies LLC	$3.1M	4.2%	661,600	Added
Morgan Stanley	$2.6M	3.5%	544,125	Trimmed
Dimensional Fund Advisors LP	$2.2M	3.0%	475,648	Trimmed
Connor, Clark & Lunn Investment Management Ltd.	$2.0M	2.6%	412,849	Added
Qube Research & Technologies Ltd	$1.8M	2.4%	382,383	New
Trexquant Investment LP	$1.4M	1.8%	285,909	New
BNP Paribas Financial Markets	$1.3M	1.7%	265,146	Trimmed
Vanguard Portfolio Management LLC	$1.1M	1.5%	239,694	Unchanged
Millennium Management LLC	$1.1M	1.5%	236,422	Trimmed
XTX Topco Ltd	$1.1M	1.4%	222,197	New
Jane Street Group, LLC	$1.0M	1.4%	215,877	Added
Oddo BHF Asset Management Sas	$1.0M	1.4%	215,098	Unchanged
Boothbay Fund Management, LLC	$946K	1.3%	200,081	Trimmed
Gsa Capital Partners LLP	$946K	1.3%	199,954	Trimmed
Caption Management, LLC	$757K	1.0%	160,090	New
Steward Partners Investment Advisory, LLC	$725K	1.0%	153,347	Trimmed
Bluefin Capital Management, LLC	$699K	0.9%	147,698	New
Group One Trading LLC	$557K	0.8%	117,823	Added
Virtu Financial LLC	$544K	0.7%	114,969	New

Share of 13F holdings is each fund's shares as a share of the 15,640,900 MX shares all 13F filers reported, not of shares outstanding.

Biggest buyers in Q2 2026

D. E. Shaw & Co., Inc. Added+$5.9M
Two Sigma Investments, LP Added+$4.4M
Renaissance Technologies LLC Added+$3.0M
Qube Research & Technologies Ltd New+$1.8M
Marshall Wace, LLP Added+$1.8M
Acadian Asset Management LLC Added+$1.5M
Connor, Clark & Lunn Investment Management Ltd. Added+$1.5M
Trexquant Investment LP New+$1.4M
XTX Topco Ltd New+$1.1M
Jane Street Group, LLC Added+$786K

Biggest sellers in Q2 2026

Oaktree Capital Management LP Trimmed-$6.4M
Ameriprise Financial Inc Sold out-$4.4M
Immersion Corp Sold out-$3.9M
Clearline Capital LP Sold out-$3.1M
First Wilshire Securities Management Inc Sold out-$2.1M
State of Wisconsin Investment Board Sold out-$1.6M
Prelude Capital Management, LLC Sold out-$1.1M
Potomac Capital Management, Inc. Sold out-$1.0M
BlackRock, Inc. Trimmed-$923K
Bridgeway Capital Management, LLC Trimmed-$888K

The change in shares since the quarter before, adjusted for stock splits and priced at the Q2 2026 value per share. Funds bought $29.0M and sold $32.1M; 23 added and 23 trimmed.

Schedule 13D and 13G filings on MX

Owners of more than 5% must file within days, so these can be newer than the 13F data.

2026-02-11SYSTEMATIC FINANCIAL MANAGEMENT LP SCHEDULE 13G filed by Magnachip Semiconductor CorporationSchedule 13G
2025-11-20Byreforge LLC SCHEDULE 13D filed by Magnachip Semiconductor CorporationSchedule 13D
2025-02-13SYSTEMATIC FINANCIAL MANAGEMENT LP SCHEDULE 13G filed by Magnachip Semiconductor CorporationSchedule 13G

Questions about MX ownership

Who owns MX stock?: 76 institutional investment managers reported MX positions in their Form 13F filings for Q2 2026, holding 15,640,900 shares worth $73.9M in total. Marshall Wace, LLP reported the largest position.
Are funds buying or selling MX?: In Q2 2026, 24 managers opened new MX positions, 23 added, 23 trimmed and 17 sold out. Managers that filed in both quarters sold a net 3,246,746 shares.
How current is this MX institutional ownership data?: It covers holdings as of the end of Q2 2026. Managers have 45 days after the quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.

From the SEC's Form 13F data sets for Q2 2026: every 13F holdings report, matched to MX by CUSIP. Options are left out. MX news and filings · MX insider trades · Top funds