Who has been buying Alarm Constraints stock?

6 distinct insiders have filed 34 disclosed insider purchases in Alarm Constraints (214390), most recently on 2026-03-17. 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 Alarm Constraints have?

Alarm Constraints has 34 buy-side and 0 sell-side disclosures on record, covering ₩169M ($117K) in total reported value, spanning 2025-01-01 to 2026-03-17.

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.

Alarm Constraints 214390

Company

경보제약Alarm Constraints

Insiders

Buys

Total Value

₩169M ($117K)

Avg Return

+2.41%

Last Filing

2026-03-17

Alarm Constraints (214390) has 34 disclosed insider purchases and 0 disclosed disposals on record, filed by 6 distinct insiders. Together those filings cover ₩169M ($117K) in reported transaction value. The earliest filing StockDrifts holds for Alarm Constraints is dated 2025-01-01; the most recent is 2026-03-17. Across these filings the average return since disclosure is +2.41%, 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
2026-03-17	BUY	Market Buy	홍성상 Hong Seong-sang	Managing Director	2.0K	-	-	-
2026-03-05	BUY	Market Buy	정희록 Jeong Hee-rok	moving	200	-	-	-
2026-02-26	BUY	Market Buy	홍성상 Hong Seong-sang	Managing Director	3.0K	-	-	-
2026-02-09	BUY	Market Buy	김도경 Kim Do-kyung	thanks	1.0K	₩5,670	+5.8%	₩6M ($4K)
2025-11-20	BUY	Market Buy	김도경 Kim Do-kyung	thanks	1.0K	₩6,020	-0.3%	₩6M ($4K)
2025-10-17	BUY	Market Buy	정희록 Jeong Hee-rok	moving	200	₩5,990	+0.2%	₩1M ($832)
2025-09-08	SELL	증여	이장한 Lee Jang-han	cum audit committee member	-479.4K	₩4,990	-20.2%	₩2.4B ($1.7M)
2025-07-01	BUY	Market Buy	김도경 Kim Do-kyung	thanks	1.0K	₩5,010	+19.8%	₩5M ($3K)
2025-06-17	BUY	Market Buy	정희록 Jeong Hee-rok	moving	400	₩4,975	+20.6%	₩2M ($1K)
2025-06-17	BUY	Market Buy	김종빈 Jongbin Kim	Executive Director	1.0K	₩4,975	+20.6%	₩5M ($4K)
2025-06-17	BUY	Market Buy	김도경 Kim Do-kyung	thanks	1.0K	₩4,975	+20.6%	₩5M ($3K)
2025-06-12	BUY	Market Buy	김도경 Kim Do-kyung	thanks	1.0K	₩5,440	+10.3%	₩5M ($4K)
2025-05-28	BUY	Market Buy	정희록 Jeong Hee-rok	moving	100	₩5,370	+11.7%	₩537K ($373)
2025-04-30	BUY	Market Buy	정희록 Jeong Hee-rok	moving	100	₩5,640	+6.4%	₩564K ($392)
2025-04-24	BUY	Market Buy	김종빈 Jongbin Kim	Executive Director	990	₩5,500	+9.1%	₩5M ($4K)
2025-04-11	BUY	Market Buy	김도경 Kim Do-kyung	thanks	1.0K	₩5,380	+11.5%	₩5M ($4K)
2025-04-09	BUY	Market Buy	김태영 Taeyoung Kim	CEO	200	₩5,040	+19.1%	₩1M ($700)
2025-04-09	BUY	Market Buy	김도경 Kim Do-kyung	thanks	1.0K	₩5,040	+19.1%	₩5M ($4K)
2025-04-04	BUY	Market Buy	김태영 Taeyoung Kim	CEO	801	₩5,400	+11.1%	₩4M ($3K)
2025-04-02	BUY	Market Buy	정희록 Jeong Hee-rok	moving	100	₩5,300	+13.2%	₩530K ($368)
2025-04-01	BUY	Market Buy	김도경 Kim Do-kyung	thanks	2.1K	₩5,370	+11.7%	₩11M ($8K)
2025-02-28	BUY	Market Buy	정희록 Jeong Hee-rok	moving	100	₩6,450	-7.0%	₩645K ($448)
2025-02-11	BUY	Market Buy	김태영 Taeyoung Kim	CEO	599	₩6,060	-1.0%	₩4M ($3K)
2025-02-10	BUY	Market Buy	김태영 Taeyoung Kim	CEO	200	₩6,190	-3.1%	₩1M ($860)
2025-02-07	BUY	Market Buy	김태영 Taeyoung Kim	CEO	1.0K	₩6,300	-4.8%	₩6M ($4K)
2025-02-04	BUY	Market Buy	정희록 Jeong Hee-rok	moving	233	₩6,590	-8.9%	₩2M ($1K)
2025-01-21	BUY	Market Buy	김종빈 Jongbin Kim	Executive Director	1.5K	₩6,660	-9.9%	₩10M ($7K)
2025-01-17	BUY	Market Buy	김종빈 Jongbin Kim	Executive Director	1.1K	₩6,560	-8.5%	₩7M ($5K)
2025-01-08	BUY	Market Buy	김태영 Taeyoung Kim	CEO	1.0K	₩6,950	-13.7%	₩7M ($5K)
2025-01-08	BUY	Market Buy	김종빈 Jongbin Kim	Executive Director	3.0K	₩6,950	-13.7%	₩21M ($14K)
2025-01-08	BUY	Market Buy	채현숙 Chae Hyeon-sook	Managing Director	2.0K	₩6,950	-13.7%	₩14M ($10K)
2025-01-07	BUY	Market Buy	김태영 Taeyoung Kim	CEO	2.0K	₩6,950	-13.7%	₩14M ($10K)
2025-01-06	BUY	Market Buy	정희록 Jeong Hee-rok	moving	60	₩6,850	-12.4%	₩411K ($285)
2025-01-06	BUY	Market Buy	김종빈 Jongbin Kim	Executive Director	1.9K	₩6,850	-12.4%	₩13M ($9K)
2025-01-03	BUY	Market Buy	정희록 Jeong Hee-rok	moving	7	₩6,900	-13.0%	₩48K ($34)
2025-01-01	BUY	신규선임	정희록 Jeong Hee-rok	moving	700	₩6,840	-12.3%	₩5M ($3K)

Frequently asked questions

Who has been buying Alarm Constraints stock?: 6 distinct insiders have filed 34 disclosed insider purchases in Alarm Constraints (214390), most recently on 2026-03-17. 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 Alarm Constraints have?: Alarm Constraints has 34 buy-side and 0 sell-side disclosures on record, covering ₩169M ($117K) in total reported value, spanning 2025-01-01 to 2026-03-17.
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.