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Key filings, March 18, 2026

1,754 filings · 11 highlights

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ContractQualitas SemiconductorKOSDAQ

Contract value

₩2.4B

Of revenue

39.9%

Worth 39.9% of last year's revenue, over about 12 months.

2026-03-17 – 2027-03-16

Company filings →Original (Korean) ↗

ContractSGC E&CKOSDAQ

Contract value

₩247B

Of revenue

20.5%

Worth 20.5% of last year's revenue, over about 49 months.

2026-03-17 – 2030-04-17

Company filings →Original (Korean) ↗

ContractSGC E&CKOSDAQ

Contract value

₩156B

Of revenue

12.9%

Worth 12.9% of last year's revenue, over about 49 months.

2026-03-17 – 2030-04-17

Company filings →Original (Korean) ↗

5% holderNew 5%Inzi ControlsKOSPI

Stake

42.94%

Change

+42.94pp

A major holder's stake rose from 0.00% to 42.94% (inheritance).

Company filings →Original (Korean) ↗

5% holderBelow 5%Inzi ControlsKOSPI

Stake

0.00%

Change

-42.94pp

A major holder's stake fell from 42.94% to 0.00% (inheritance).

Company filings →Original (Korean) ↗

5% holderNew 5%KnowmerceKOSDAQ

Stake

6.06%

Change

+1.14pp

A major holder's stake rose from 4.92% to 6.06% (new report).

Company filings →Original (Korean) ↗

BuybackBuybackSamsung Electronics Co,KOSPI

Planned buyback

₩7.17T

37,000,000 sh

Plans to buy back 37,000,000 sh of treasury stock, Mar 19 to Jun 18.

Company filings →Original (Korean) ↗

BuybackBuybackAnam ElectronicsKOSPI

Planned buyback

₩40B

25,657,000 sh

Plans to buy back 25,657,000 sh of treasury stock, Mar 19 to Apr 10.

Company filings →Original (Korean) ↗

BuybackTrustHansol IONESKOSDAQ

Trust size

₩6B

Signed a ₩6B trust contract to buy back shares.

Company filings →Original (Korean) ↗

IssuanceCBCU Medical SystemsKOSDAQ

Issue size

₩7B

If all converted

21.7%

Conversion price ₩533; if all converted, equal to 21.7% of shares outstanding.

Company filings →Original (Korean) ↗

IssuanceCBPhotonKOSDAQ

Issue size

₩4B

If all converted

13.4%

Conversion price ₩1,959; if all converted, equal to 13.4% of shares outstanding.

Company filings →Original (Korean) ↗

Supply contracts 12

3/18AmendedSphere Worth 1684.9% of last year's revenue, over about 2 months.₩43.1B

3/18Qualitas Semiconductor Worth 39.9% of last year's revenue, over about 12 months.₩2.4B

3/18AmendedVictek Worth 31.2% of last year's revenue, over about 39 months.₩17.1B

3/18SGC E&C Worth 20.5% of last year's revenue, over about 49 months.₩247B

3/18SGC E&C Worth 12.9% of last year's revenue, over about 49 months.₩156B

3/18Hims Worth 12.2% of last year's revenue, over about 2 months.₩7.5B

3/18Frtek Worth 11.4% of last year's revenue, over about 3 months.₩3.4B

3/18AmendedLIG Defense&Aerospace Worth 10.4% of last year's revenue, over about 58 months.₩167B

3/18Sensorview Worth 9% of last year's revenue, over about 51 months.₩1.4B

3/18Innosimulation Worth 8.3% of last year's revenue, over about 16 months.₩770M

3/18AmendedVictek Worth 6.8% of last year's revenue, over about 26 months.₩3.7B

3/18AmendedKye-Ryong Construction Industrial Worth 2.7% of last year's revenue, over about 43 months.₩68.6B

Preliminary earnings 1

3/18AmendedSwung to profitHanon Systems Operating profit: swung to profit (-₩138B → ₩89.7B). Revenue ₩2.70T, up 6.6% YoY.₩89.7B

Insider trades 66

3/18Daewon Media Insider ownership report

3/18Yuanta Securities Korea Insider ownership report

3/18Inzi Display Company Insider ownership report

3/18Celemics Insider ownership report

3/18Inzi Display Company Insider ownership report

3/18EuBiologics Insider ownership report

3/18Celemics Insider ownership report

3/18Chinyang Holdings Insider ownership report

3/18Fine DNC Insider ownership report

3/18KolonGlobal Insider ownership report

3/18Fine DNC Insider ownership report

3/18Hanwha REIT Insider ownership report

3/18Koramco Life Infra Reit Insider ownership report

3/18Koramco the ONE Reit Insider ownership report

3/18Maniker Insider ownership report

3/18IGIS Value Plus REIT Insider ownership report

3/18E Kocref Cr-Reit Insider ownership report

3/18Shinhan Alpha REIT Co,.Insider ownership report

3/18Shinhan Seobu T&D REIT Insider ownership report

3/18SamsungFN REIT Insider ownership report

3/18Samil C&S Insider ownership report

3/18Miraeasset Maps REIT 1 Insider ownership report

3/18Lotte Reit Insider ownership report

3/18D&D Platform REIT Insider ownership report

3/18SK Reit Insider ownership report

3/18ESR Kendall Square REIT Insider ownership report

3/18Justem.Insider ownership report

3/18Hanjoo Light Metal Insider ownership report

3/18Celemics Insider ownership report

3/18Justem.Insider ownership report

3/18AmendedShin Heung Energy & Electronics Insider ownership report

3/18Justem.Insider ownership report

3/18Shin Heung Energy & Electronics Insider ownership report

3/18It-Chem Insider ownership report

3/18E8 Insider ownership report

3/18Poongwon Precision Insider ownership report

3/18Daesung Industrial Insider ownership report

3/18INNOX Advanced Materials Insider ownership report

All insider trades →

5% holders 41

3/18New 5%Inzi Controls A major holder's stake rose from 0.00% to 42.94% (inheritance).42.94%

3/18Below 5%Inzi Controls A major holder's stake fell from 42.94% to 0.00% (inheritance).0.00%

3/18New 5%Knowmerce A major holder's stake rose from 4.92% to 6.06% (new report).6.06%

3/18New 5%HS Hwasung A major holder's stake rose from 4.99% to 5.48%.5.48%

3/18New 5%MKElectron A major holder's stake rose from 4.98% to 5.41%.5.41%

3/18New 5%CJ Freshway A major holder's stake rose from 4.94% to 5.03%.5.03%

3/18New 5%Zinus A major holder's stake rose from 4.93% to 5.00%.5.00%

3/18Below 5%Pangen Biotech A major holder's stake fell from 7.28% to 0.00%.0.00%

3/18Below 5%Celemics A major holder's stake fell from 9.77% to 4.50%.4.50%

3/18Below 5%Suprema HQ A major holder's stake fell from 5.07% to 0.00%.0.00%

3/18Below 5%Yg-1 A major holder's stake fell from 9.73% to 4.79% (open-market sale).4.79%

3/18Cnplus A major holder's stake fell from 13.29% to 10.47% (conversion/exercise).10.47%

3/18HL Holdings A major holder's stake rose from 35.63% to 37.08% (open-market buy).37.08%

3/18S-Energy A major holder's stake fell from 17.53% to 16.08% (related-party change).16.08%

3/18Maniker A major holder's stake rose from 30.00% to 31.00% (open-market buy).31.00%

3/18IDP A major holder's stake rose from 57.58% to 58.58% (open-market buy).58.58%

3/18Hanjoo Light Metal A major holder's stake fell from 13.01% to 12.13% (open-market buy).12.13%

3/18LF A major holder's stake rose from 57.48% to 58.22% (pledge).58.22%

3/18Incar Financial Service A major holder's stake fell from 43.38% to 42.97% (related-party change).42.97%

3/18Chinyang Holdings A major holder's stake rose from 67.26% to 67.66% (rights offering).67.66%

3/18Tovis A major holder's stake rose from 16.69% to 16.93% (related-party change).16.93%

3/18Daewon Media A major holder's stake fell from 36.85% to 36.63% (gift).36.63%

3/18NPK A major holder's stake rose from 49.77% to 49.93% (open-market buy).49.93%

3/18Fine DNC A major holder's stake rose from 53.75% to 53.89% (open-market buy).53.89%

3/18Justem.A major holder's stake fell from 31.04% to 30.91% (stock option).30.91%

3/18AmendedEnzychem Lifesciences A major holder's stake rose from 20.14% to 20.24% (related-party change).20.24%

3/18Hansol Holdings A major holder's stake fell from 34.89% to 34.81%.34.81%

3/18Sangbo A major holder's stake rose from 16.87% to 16.95% (open-market buy).16.95%

3/18Krafton A major holder's stake rose from 37.20% to 37.24% (open-market buy).37.24%

3/18Socar A major holder's stake fell from 47.26% to 47.24% (open-market buy).47.24%

3/18Genoray A major holder's stake rose from 26.88% to 26.90% (open-market buy).26.90%

3/18Celltrion A major holder's stake fell from 31.80% to 31.79% (share lending).31.79%

3/18Saltware A major holder's stake rose from 59.59% to 59.60% (pledge).59.60%

3/18Cheongbo Report of 5%+ holding

3/18DB Insurance A major holder's stake rose from 25.96% to 25.96% (pledge).25.96%

3/18Celemics Report of 5%+ holding

3/18M2n A major holder's stake rose from 37.65% to 37.65% (share lending).37.65%

3/18Hyundai Mobis A major holder's stake rose from 32.70% to 32.70% (related-party change).32.70%

3/18Cymechs A major holder's stake rose from 47.39% to 47.39% (inheritance).47.39%

3/18Inzi Display Company A major holder's stake rose from 57.74% to 57.74% (inheritance).57.74%

All 5% holders →

Buybacks 9

3/18BuybackSamsung Electronics Co,Plans to buy back 37,000,000 sh of treasury stock, Mar 19 to Jun 18.₩7.17T

3/18DisposalSamsung Electronics Co,Plans to dispose of 2,039,151 sh of treasury stock, Mar 20 to Mar 20.₩395B

3/18BuybackAnam Electronics Plans to buy back 25,657,000 sh of treasury stock, Mar 19 to Apr 10.₩40B

3/18TrustHansol IONES Signed a ₩6B trust contract to buy back shares.₩6B

3/18UIL Share cancellation

3/18Samyang Holdings Share cancellation

3/18Samyang Share cancellation

3/18Unichem Share cancellation

3/18Inveni Share cancellation

Share issues & bonds 12

3/18CBCU Medical Systems Conversion price ₩533; if all converted, equal to 21.7% of shares outstanding.₩7B

3/18CBPhoton Conversion price ₩1,959; if all converted, equal to 13.4% of shares outstanding.₩4B

3/18AmendedRights offeringEOFlow Issuing 530,000 sh of new shares, equal to 1.3% of existing shares.₩1.1B

3/18CBHydro Lithium Conversion price ₩1,962; if all converted, equal to 0.1% of shares outstanding.₩160M

3/18Polaris AI Pharma Convertible bond issue

3/18AmendedParatech Company Convertible bond issue

3/18AmendedRootK Convertible bond issue

3/18AmendedChoolip & Sciences Rights offering

3/18Zinitix Rights offering

3/18AmendedTHE Willbes &Capital reduction

M&A & spin-offs 3

3/18AmendedmPlus Tangible asset deal

3/18AmendedNeorigin Stake acquisition/disposal

3/18AmendedSynergy Innovation Stake acquisition/disposal

Exchange actions 4

3/18KD Trading halt

3/18Unitrontech Unfaithful disclosure

3/18Exicure Hitron Exchange

3/18Charm Engineering Exchange