Who has been buying protea stock?

4 distinct insiders have filed 22 disclosed insider purchases in protea (303360), most recently on 2026-04-09. 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 protea have?

protea has 22 buy-side and 9 sell-side disclosures on record, covering ₩788M ($547K) in total reported value, spanning 2024-04-04 to 2026-04-09.

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.

protea 303360

Company

프로티아protea

Insiders

Buys

Total Value

₩788M ($547K)

Avg Return

+35.55%

Last Filing

2026-04-09

protea (303360) has 22 disclosed insider purchases and 9 disclosed disposals on record, filed by 4 distinct insiders. Together those filings cover ₩788M ($547K) in reported transaction value. The earliest filing StockDrifts holds for protea is dated 2024-04-04; the most recent is 2026-04-09. Across these filings the average return since disclosure is +35.55%, 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
2026-04-09	BUY	Market Buy	임진형 Im Jin-hyung	thanks	3.0K	₩4,635	+7.9%	₩14M ($10K)
2026-04-08	SELL	Market Sell	최동섭 Choi Dong-seop	Managing Director	-4.5K	₩4,675	-7.0%	₩21M ($14K)
2026-04-07	SELL	Market Sell	최동섭 Choi Dong-seop	Managing Director	-2.7K	₩4,460	-12.1%	₩12M ($8K)
2026-04-06	SELL	Market Sell	최동섭 Choi Dong-seop	Managing Director	-2.5K	₩4,535	-10.3%	₩11M ($8K)
2026-04-03	SELL	Market Sell	최동섭 Choi Dong-seop	Managing Director	-3.3K	₩4,480	-11.6%	₩15M ($10K)
2026-04-02	SELL	Market Sell	최동섭 Choi Dong-seop	Managing Director	-3.0K	₩4,450	-12.4%	₩13M ($9K)
2026-03-31	SELL	Market Sell	최동섭 Choi Dong-seop	Managing Director	-3.0K	₩4,410	-13.4%	₩13M ($9K)
2026-03-27	SELL	Market Sell	최동섭 Choi Dong-seop	Managing Director	-4.7K	₩4,740	-5.5%	₩22M ($15K)
2026-03-26	SELL	Market Sell	최동섭 Choi Dong-seop	Managing Director	-1.5K	₩4,670	-7.1%	₩7M ($5K)
2026-03-26	BUY	신규선임	이시혁 Sihyuk Lee	Outside Director	4.8K	₩4,670	+7.1%	₩22M ($16K)
2026-03-25	SELL	Market Sell	최동섭 Choi Dong-seop	Managing Director	-5.0K	₩4,735	-5.6%	₩24M ($16K)
2026-03-10	BUY	주식매수청구권 행사	최동섭 Choi Dong-seop	Managing Director	2.5K	-	-	-
2026-03-09	BUY	기타	손순진 Sunjin Son	moving	4.6K	-	-	-
2025-10-29	BUY	Market Buy	이영구 Younggu Lee	Outside Director	33	₩4,680	+15.2%	₩154K ($107)
2025-09-23	BUY	Market Buy	이영구 Younggu Lee	Outside Director	1.3K	₩4,560	+18.2%	₩6M ($4K)
2025-09-15	BUY	Market Buy	이영구 Younggu Lee	Outside Director	703	₩5,720	-5.8%	₩4M ($3K)
2025-09-11	BUY	Market Buy	이영구 Younggu Lee	Outside Director	80	₩5,940	-9.3%	₩475K ($330)
2025-09-05	BUY	Market Buy	이영구 Younggu Lee	Outside Director	100	₩5,220	+3.3%	₩522K ($363)
2025-09-02	BUY	Market Buy	이영구 Younggu Lee	Outside Director	200	₩4,965	+8.6%	₩993K ($690)
2025-08-27	BUY	기타	김성태 Seongtae Kim	moving	1.4K	₩4,550	+18.5%	₩7M ($5K)
2025-04-03	BUY	기타	홍성이 Hongseong	Managing Director	2.5K	₩3,175	+69.8%	₩8M ($6K)
2025-01-06	BUY	신규선임	김태형 Taehyung Kim	Managing Director	22.0K	₩2,800	+92.5%	₩62M ($43K)
2024-11-22	BUY	Market Buy	임진형 Im Jin-hyung	thanks	8.0K	₩2,615	+106.1%	₩21M ($15K)
2024-11-19	BUY	Market Buy	임진형 Im Jin-hyung	thanks	11.0K	₩2,580	+108.9%	₩28M ($20K)
2024-08-26	BUY	Market Buy	임국진 Gukjin Lim	CEO	8.5K	₩2,870	+87.8%	₩24M ($17K)
2024-08-23	BUY	Market Buy	임국진 Gukjin Lim	CEO	1.2K	₩2,985	+80.6%	₩4M ($2K)
2024-08-21	BUY	Market Buy	임국진 Gukjin Lim	CEO	12.1K	₩3,080	+75.0%	₩37M ($26K)
2024-07-04	BUY	Market Buy	임국진 Gukjin Lim	CEO	3.1K	₩3,455	+56.0%	₩11M ($7K)
2024-07-03	BUY	Market Buy	임국진 Gukjin Lim	CEO	21.3K	₩3,450	+56.2%	₩73M ($51K)
2024-07-02	BUY	Market Buy	임국진 Gukjin Lim	CEO	37.0K	₩3,360	+60.4%	₩124M ($86K)
2024-07-01	BUY	Market Buy	임국진 Gukjin Lim	CEO	10.0K	₩3,315	+62.6%	₩33M ($23K)
2024-05-28	BUY	Market Buy	임국진 Gukjin Lim	CEO	6.8K	₩3,140	+71.7%	₩21M ($15K)
2024-05-27	BUY	Market Buy	임국진 Gukjin Lim	CEO	37.8K	₩3,130	+72.2%	₩118M ($82K)
2024-05-24	BUY	Market Buy	임국진 Gukjin Lim	CEO	8.8K	₩3,115	+73.0%	₩27M ($19K)
2024-05-23	BUY	Market Buy	임국진 Gukjin Lim	CEO	4.3K	₩3,105	+73.6%	₩13M ($9K)
2024-05-22	BUY	Market Buy	임국진 Gukjin Lim	CEO	2.6K	₩3,080	+75.0%	₩8M ($6K)
2024-04-04	BUY	Market Buy	임진형 Im Jin-hyung	thanks	28.0K	₩2,840	+89.8%	₩80M ($55K)

Frequently asked questions

Who has been buying protea stock?: 4 distinct insiders have filed 22 disclosed insider purchases in protea (303360), most recently on 2026-04-09. 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 protea have?: protea has 22 buy-side and 9 sell-side disclosures on record, covering ₩788M ($547K) in total reported value, spanning 2024-04-04 to 2026-04-09.
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.