Who has been buying Excellent AMS stock?

3 distinct insiders have filed 27 disclosed insider purchases in Excellent AMS (066590), most recently on 2026-07-08. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.

How many insider filings does Excellent AMS have?

Excellent AMS has 27 buy-side and 0 sell-side disclosures on record, covering ₩2.8B ($2.0M) in total reported value, spanning 2025-05-27 to 2026-07-08.

Do insider buys in Korean stocks predict returns?

Not uniformly. StockDrifts analysed 170,720 share-count changes across 56,930 Korean regulatory filings using cross-sectional alpha at fixed forward horizons, and found returns concentrated in particular signal tiers rather than in insider buying generally.

Excellent AMS 066590

Company

우수AMSExcellent AMS

Insiders

Buys

Total Value

₩2.8B ($2.0M)

Avg Return

+0.89%

Last Filing

2026-07-08

Excellent AMS (066590) has 27 disclosed insider purchases and 0 disclosed disposals on record, filed by 3 distinct insiders. Together those filings cover ₩2.8B ($2.0M) in reported transaction value. The earliest filing StockDrifts holds for Excellent AMS is dated 2025-05-27; the most recent is 2026-07-08. Across these filings the average return since disclosure is +0.89%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent insider trades

Date	Type	Source	Insider	Position	Shares	Price at filing	Return	Value
2026-08-03	BUY	Market Buy	오트로닉 Otronic	-	59.8K	₩2,390	+9.4%	₩148M ($103K)
2026-07-31	BUY	Market Buy	오트로닉 Otronic	-	295.6K	₩2,410	+8.5%	₩692M ($480K)
2026-07-27	BUY	Market Buy	오트로닉 Otronic	-	156.9K	₩2,750	-12.4%	₩432M ($300K)
2026-07-24	BUY	Market Buy	오트로닉 Otronic	-	29.9K	₩2,545	+0.0%	₩74M ($52K)
2026-07-23	SELL	장외매도	고진호 Go Jin-ho	Internal director	-370.0K	₩2,760	+7.8%	₩1.0B ($708K)
2026-07-23	BUY	장외매수	오트로닉 Otronic	-	370.0K	₩2,760	-7.8%	₩1.0B ($708K)
2026-07-21	BUY	Market Buy	오트로닉 Otronic	-	15.0K	₩3,185	-20.1%	₩37M ($26K)
2026-07-20	BUY	Market Buy	오트로닉 Otronic	-	395.0K	₩2,450	+3.9%	₩982M ($682K)
2026-07-15	BUY	Market Buy	오트로닉 Otronic	-	132.0K	₩2,560	-0.6%	₩326M ($227K)
2026-07-14	BUY	Market Buy	오트로닉 Otronic	-	15.8K	₩2,320	+9.7%	₩36M ($25K)
2026-07-08	BUY	Market Buy	오트로닉 Otronic	-	39.1K	₩2,345	+7.7%	₩90M ($62K)
2026-07-07	BUY	Market Buy	오트로닉 Otronic	-	123.8K	₩2,215	+6.8%	₩274M ($190K)
2026-07-03	BUY	Market Buy	오트로닉 Otronic	-	28.1K	₩2,180	+8.5%	₩61M ($43K)
2026-07-02	BUY	Market Buy	오트로닉 Otronic	-	39.0K	₩2,090	+13.2%	₩82M ($57K)
2026-07-01	BUY	Market Buy	오트로닉 Otronic	-	37.6K	₩2,100	+12.6%	₩79M ($55K)
2026-04-30	BUY	Market Buy	고진호 Go Jin-ho	Internal director	66.8K	₩2,760	+0.0%	₩184M ($128K)
2026-04-29	BUY	Market Buy	고진호 Go Jin-ho	Internal director	97.5K	₩2,910	-5.2%	₩284M ($197K)
2026-04-28	BUY	Market Buy	고진호 Go Jin-ho	Internal director	90.1K	₩2,765	-0.2%	₩249M ($173K)
2026-04-27	BUY	Market Buy	고진호 Go Jin-ho	Internal director	71.8K	₩2,670	+3.4%	₩192M ($133K)
2026-04-24	BUY	Market Buy	고진호 Go Jin-ho	Internal director	43.8K	₩2,635	+4.7%	₩116M ($80K)
2025-11-28	BUY	장외매수	퓨트로닉 Putronic	-	952.2K	₩2,520	+24.2%	₩2.4B ($1.7M)
2025-09-23	BUY	장외매수	퓨트로닉 Putronic	-	424.5K	₩2,900	+7.9%	₩1.2B ($855K)
2025-09-18	BUY	장외매수	퓨트로닉 Putronic	-	1.5M	₩3,000	+4.3%	₩4.4B ($3.1M)
2025-09-03	SELL	기타	다담하모니제1호 Dadam Harmony No. 1	-	-4.5M	₩2,825	-10.8%	₩12.6B ($8.8M)
2025-07-14	BUY	장외매수	퓨트로닉 Putronic	-	600.0K	₩3,390	-7.7%	₩2.0B ($1.4M)
2025-07-04	BUY	장외매수	퓨트로닉 Putronic	-	1.8M	₩3,950	-20.8%	₩7.0B ($4.8M)
2025-07-04	BUY	장외매수	퓨트로닉 Putronic	-	1.1M	₩3,950	-20.8%	₩4.2B ($2.9M)
2025-07-04	BUY	장외매수	퓨트로닉 Putronic	-	600.0K	₩3,950	-20.8%	₩2.4B ($1.6M)
2025-06-23	BUY	Market Buy	퓨트로닉 Putronic	-	9.8K	₩3,465	-9.7%	₩34M ($24K)
2025-06-20	BUY	Market Buy	퓨트로닉 Putronic	-	36.7K	₩3,315	-5.6%	₩122M ($84K)
2025-06-19	BUY	Market Buy	퓨트로닉 Putronic	-	26.6K	₩3,165	-1.1%	₩84M ($58K)
2025-06-18	BUY	Market Buy	퓨트로닉 Putronic	-	10.0K	₩3,160	-0.9%	₩32M ($22K)
2025-06-17	BUY	Market Buy	퓨트로닉 Putronic	-	8.1K	₩3,165	-1.1%	₩26M ($18K)
2025-06-16	BUY	Market Buy	퓨트로닉 Putronic	-	9.2K	₩3,165	-1.1%	₩29M ($20K)
2025-06-13	BUY	Market Buy	퓨트로닉 Putronic	-	8.7K	₩3,160	-0.9%	₩28M ($19K)
2025-06-12	BUY	Market Buy	퓨트로닉 Putronic	-	4.7K	₩3,160	-0.9%	₩15M ($10K)
2025-06-11	BUY	Market Buy	퓨트로닉 Putronic	-	23.3K	₩3,155	-0.8%	₩74M ($51K)
2025-06-10	BUY	Market Buy	퓨트로닉 Putronic	-	29.9K	₩3,150	-0.6%	₩94M ($65K)
2025-06-09	BUY	Market Buy	퓨트로닉 Putronic	-	13.3K	₩3,170	-1.3%	₩42M ($29K)
2025-06-05	BUY	Market Buy	퓨트로닉 Putronic	-	17.2K	₩3,150	-0.6%	₩54M ($38K)
2025-06-04	BUY	Market Buy	퓨트로닉 Putronic	-	20.5K	₩3,155	-0.8%	₩65M ($45K)
2025-06-02	BUY	Market Buy	퓨트로닉 Putronic	-	78.0K	₩3,150	-0.6%	₩246M ($171K)
2025-05-30	BUY	Market Buy	퓨트로닉 Putronic	-	84.7K	₩3,175	-1.4%	₩269M ($187K)
2025-05-29	BUY	Market Buy	퓨트로닉 Putronic	-	7.7K	₩3,150	-0.6%	₩24M ($17K)
2025-05-28	BUY	Market Buy	퓨트로닉 Putronic	-	396	₩3,110	+0.6%	₩1M ($855)
2025-05-27	BUY	신규주요주주	퓨트로닉 Putronic	-	84.1K	₩3,110	+0.6%	₩262M ($182K)
2025-05-27	BUY	신규보고	퓨트로닉 Putronic	-	3.8M	₩3,110	+0.6%	₩11.9B ($8.3M)

Frequently asked questions

Who has been buying Excellent AMS stock?: 3 distinct insiders have filed 27 disclosed insider purchases in Excellent AMS (066590), most recently on 2026-07-08. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.
How many insider filings does Excellent AMS have?: Excellent AMS has 27 buy-side and 0 sell-side disclosures on record, covering ₩2.8B ($2.0M) in total reported value, spanning 2025-05-27 to 2026-07-08.
Do insider buys in Korean stocks predict returns?: Not uniformly. StockDrifts analysed 170,720 share-count changes across 56,930 Korean regulatory filings using cross-sectional alpha at fixed forward horizons, and found returns concentrated in particular signal tiers rather than in insider buying generally.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.