RF Systems474610

Largest holderRF Materials30.91%$20M

Filed holders135% or more, plus insiders

Price and institutional trades

1Y 2Y

$4.40+1.4%2Y

JanAprJulOctJanAprJulOct

Holders

$20M · 2026-10-1530.91%

$9.2M · 2026-10-3014.57%+1.99pp

$2.6M · 2025-02-214.41%−2.33pp

$1.6M · direct 1.25% · indirect 1.31% · 2026-10-152.56%+0.65pp

Direct1.25%
RF Materials 4.25% → RF Systems 30.91%1.31%

$1.2M · 2025-02-182.18%

$592K · 2025-02-181.04%

7 other related parties$1.2M1.99%

Average cost is the mean purchase price from filings since November 2024. Indirect stakes multiply ownership through listed companies.

Indirect-only holders

$8.1M · indirect12.84%

RF Materials 41.55% → RF Systems 30.91%

Filings

Filed	Changed	Before → after	Amount	Avg buy price
2026-10-30	-	14.41 → 14.57%	+$121K	-	Filing
2026-10-23	-	14.23 → 14.41%	+$135K	-	Filing
2026-10-15	2026-10-14	46.23 → 47.69%	+$918K	$5.47	Filing
2026-10-15	-	13.96 → 14.23%	+$236K	-	Filing
2026-08-28	-

$1.7M · indirect2.67%

Rfhic 3.99% → RF Materials 41.55% → RF Systems 30.91%0.51%
RF Materials 6.20% → RF Systems 30.91%1.92%
Industrial Bank of Korea 5.45% → RF Systems 4.41%0.24%

$1.2M · indirect1.97%

Rfhic 15.35% → RF Materials 41.55% → RF Systems 30.91%1.97%

$902K · indirect1.42%

Rfhic 11.08% → RF Materials 41.55% → RF Systems 30.91%1.42%

$899K · indirect1.42%

RF Materials 3.99% → RF Systems 30.91%1.23%
Rfhic 1.44% → RF Materials 41.55% → RF Systems 30.91%0.18%

$455K · indirect0.72%

RF Materials 2.32% → RF Systems 30.91%0.72%

$223K · indirect0.35%

Rfhic 2.74% → RF Materials 41.55% → RF Systems 30.91%0.35%

$188K · indirect0.30%

RF Materials 0.96% → RF Systems 30.91%0.30%

$102K · indirect0.16%

RF Materials 0.52% → RF Systems 30.91%0.16%

$88K · indirect0.14%

Rfhic 1.08% → RF Materials 41.55% → RF Systems 30.91%0.14%

No direct stake in the filings. It may be under 5% or filed before November 2024, so actual holdings may be larger.

27 in the last 2 years · amount = quantity × price per trade in the last year (closing price where no price is filed), avg buy price = average of buys in that filing · change dates and prices only where the original filing was fetched

· avg $4.30 (partial)

Han Ki-wooInsider report