Magnachip Semiconductor MX Insider Ownership

NYSE MX

$2.56 +0.00 (+0.00%)

As of: Oct 19, 2026 · 3:59 PM EDT

Insider Holdings by Owner

3.48Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

8.78%

▲+1.59% pp QoQ

Shares Held by Insiders

3.20Mn

filed for Sep 2026

▲+22.16% QoQ

Shares Outstanding

36.51Mn

36,510,111 shares

Direct Holdings

3.01Mn

Indirect: 198.20K

Net Shares Traded (QoQ)

+581.23K

net buying in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

Across the past 12 months, open-market trades by Magnachip Semiconductor insiders were all purchases, totaling $486,470 (160K shares).

By number of insiders, Magnachip Semiconductor saw 2 insiders buy on the open market over the past 12 months and none sell.
Among MX insiders, Chae Lee (Chief Executive Officer) bought the most stock on the open market in the past 12 months: $318,496 (100K shares), most recently on September 24, 2026.
In transactions other than open-market trades, Magnachip Semiconductor insiders received 666.26K shares in stock awards and gave up 36.33K shares to cover taxes or exercise prices over the past 12 months.
Business Quant data shows Magnachip Semiconductor insiders holding 3.2Mn shares in total in their latest Form 4 filings, up 22.16% from 2.62Mn shares at the end of Q2 2026 and up 29.17% from 2.48Mn shares at the end of Q3 2025.
Direct holdings account for 3.01Mn shares (93.81%) of MX's insider total, and indirect holdings through trusts, partnerships and family members for 198.2K shares (6.19%).
MX's insider total is spread across 11 insiders who have filed a Form 4 in the past two years.
Magnachip Semiconductor's three biggest insider holders are Young-Joon Kim (Director and officer, 590.97K shares), Camillo Martino (Director, 450.66K shares) and Gilbert E. Nathan (Director, 423.88K shares), based on their latest Form 4 filings.
The holding of Young-Joon Kim makes up 18.44% of all shares held by Magnachip Semiconductor insiders.
Institutions owned 42.84% of MX shares as of Q2 2026; insiders' latest Form 4 filings account for about 8.78%, leaving roughly 48.38% with other investors, including the public.
Over the past 12 months, 7 insiders reported transactions in Magnachip Semiconductor stock in 17 Form 4 filings.
These insider figures for Magnachip Semiconductor are based on Form 4 filings through September 25, 2026.

Form 4 Holdings

Insiders Holding MX

Insiders 16

Shares held 3.48Mn

Of outstanding 9.53%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	Young-Joon Kim	Director And Ceo	590,970	590,970	17.0%	03 Jun, 2025
2	Camillo Martino	Director	410,661	410,661	11.8%	18 Aug, 2026
3	Chae Lee	Chief Executive Officer	388,750	388,750	11.2%	25 Sep, 2026
4	Shinyoung Park	Chief Financial Officer	327,954	327,954	9.4%	03 Jun, 2026
5	Theodore S Kim	Officer	293,200	293,200	8.4%	03 Jan, 2025
6	Ilbok Lee	Director	275,026	275,026	7.9%	03 Jul, 2025
7	Gilbert E Nathan	Director	265,682	265,682	7.6%	03 Aug, 2026
8	Seunghoon Lee	Chief Of Manufacturing	158,201	158,201	4.5%	03 Jun, 2026
9	Woung Moo Lee	Officer	151,903	151,903	4.4%	13 Jun, 2024
10	Kyo-Hwa Liz Chung	Director	149,599	149,599	4.3%	03 Aug, 2026
11	Gary W. Tanner	Director	131,009	131,009	3.8%	05 Jun, 2023
12	Melvin L Keating	Director	124,445	124,445	3.6%	05 Jun, 2023
13	Cristiano Amoruso	Director	75,057	75,057	2.2%	03 Aug, 2026
14	Jinseok Yang	Officer	70,742	70,742	2.0%	04 Mar, 2025
15	Chan Ho Park	Officer	42,012	42,012	1.2%	03 Jan, 2024
16	Young Soo Woo	Officer	23,697	23,697	0.7%	04 Jan, 2022

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

538 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
23 Sep, 2026	Chae Lee	Chief Executive Officer	Acquired P	50,000	$3.17	$158.50K	338,750	Direct
23 Sep, 2026	Chae Lee	Chief Executive Officer	Acquired P	30,000	$3.19	$95.60K	368,750	Direct
24 Sep, 2026	Chae Lee	Chief Executive Officer	Acquired P	20,000	$3.22	$64.40K	388,750	Direct
15 Aug, 2026	Camillo Martino	Director	Acquired A	6,764	$0.00	$0	410,661	Direct
01 Aug, 2026	Gilbert E Nathan	Director	Acquired A	51,191	$0.00	$0	265,682	Direct
01 Aug, 2026	Kyo-Hwa Liz Chung	Director	Acquired A	48,810	$0.00	$0	149,599	Direct
01 Aug, 2026	Camillo Martino	Director	Acquired A	39,286	$0.00	$0	403,897	Direct
01 Aug, 2026	Cristiano Amoruso	Director	Acquired A	46,429	$0.00	$0	75,057	Direct
01 Jul, 2026	Chae Lee	Chief Executive Officer	Acquired A	288,750	$0.00	$0	288,750	Direct
01 Jul, 2026	Chae Lee	Chief Executive Officer	Acquired A	148,750	$0.00	$0	148,750	Direct
01 Jun, 2026	Shinyoung Park	Chief Financial Officer	Acquired A	112,500	$0.00	$0	327,954	Direct
01 Jun, 2026	Seunghoon Lee	Chief Of Manufacturing	Acquired A	30,000	$0.00	$0	158,201	Direct
16 Mar, 2026	Gilbert E Nathan	Director	Acquired P	21,994	$2.87	$63.05K	158,200	Indirect
12 Mar, 2026	Gilbert E Nathan	Director	Acquired P	25,000	$2.75	$68.68K	123,200	Indirect
13 Mar, 2026	Gilbert E Nathan	Director	Acquired P	13,006	$2.79	$36.25K	136,206	Indirect
15 Feb, 2026	Gilbert E Nathan	Director	Acquired A	1,478	$0.00	$0	214,491	Direct
15 Feb, 2026	Cristiano Amoruso	Director	Acquired A	28,628	$0.00	$0	28,628	Direct
15 Feb, 2026	Kyo-Hwa Liz Chung	Director	Acquired A	2,946	$0.00	$0	100,789	Direct
31 Dec, 2025	Shin Young Park	Officer	Disposed F	6,121	$2.55	$15.61K	245,665	Direct
31 Dec, 2025	Shin Young Park	Officer	Disposed F	12,234	$2.55	$31.20K	233,431	Direct

Showing 1 to 20 of 538 transactions