Oberweis Asset Management’s OSI Systems OSIS Stock Holding History

Oberweis Asset Management’s Portfolio OSIS Stock Details OSIS Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$23.4M	Buy	107,143 +550	+0.5%	+$135K	0.48%	76
2026 Q1	$28.3M	Buy	106,593 +5,193	+5%	+$1.44M	0.84%	36
2025 Q4	$25.9M	Hold	101,400	–	–	0.95%	24
2025 Q3	$25.3M	Sell	101,400 -7,600	-7%	-$1.73M	0.97%	23
2025 Q2	$24.5M	Buy	109,000 +8,600	+9%	+$1.84M	1.07%	24
2025 Q1	$19.5M	Hold	100,400	–	–	0.97%	31
2024 Q4	$16.8M	Buy	100,400 +31,200	+45%	+$4.95M	0.79%	43
2024 Q3	$10.5M	Hold	69,200	–	–	0.54%	68
2024 Q2	$9.52M	Buy	69,200 +13,900	+25%	+$1.92M	0.58%	62
2024 Q1	$7.9M	Buy	55,300 +20,000	+57%	+$2.63M	0.57%	68
2023 Q4	$4.56M	Buy	35,300 +9,900	+39%	+$1.18M	0.42%	96
2023 Q3	$3M	Buy	+25,400	New	+$3.06M	0.32%	121
2018 Q1	–	Sell	-14,900	Closed	-$959K	–	239
2017 Q4	$959K	Buy	14,900 +100	+0.7%	+$8.4K	0.22%	105
2017 Q3	$1.35M	Hold	14,800	–	–	0.38%	64
2017 Q2	$1.11M	Buy	14,800 +2,500	+20%	+$189K	0.31%	68
2017 Q1	$898K	Buy	+12,300	New	+$914K	0.26%	80

Other funds holding OSIS

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Jupiter Topco New York $245B AUM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Capital International Investors Los Angeles, California $484B AUM 34.9% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

UBS AM Chicago, Illinois $550B AUM 43.33% 1-Year Est. Return

CCM

Channing Capital Management Chicago, Illinois $4.34B AUM 37.08% 1-Year Est. Return

Oberweis Asset Management's OSIS Position: Q2 2026 in Review

Oberweis Asset Management increased its OSI Systems (OSIS) stake by 0.52% in Q2 2026, buying an estimated $135K and bringing the position to 107,143 shares worth $23.4M. The position accounts for 0.48% of the portfolio, ranked #76.

Oberweis Asset Management first reported a position in OSIS in Q1 2017 and has held it in 16 quarters since. The position peaked at $28.3M in Q1 2026. 362 funds tracked by Wall St. Rank hold OSIS as of Q2 2026.

Oberweis Asset Management held 107,143 shares of OSI Systems worth $23.4M as of Q2 2026.
Oberweis Asset Management bought 550 OSI Systems shares in Q2 2026, an estimated $135K.
OSI Systems made up 0.48% of Oberweis Asset Management's portfolio in Q2 2026, its #76 holding.
Oberweis Asset Management first reported a position in OSI Systems in Q1 2017 and has held it in 16 quarters since.
Oberweis Asset Management's OSI Systems position peaked at $28.3M in Q1 2026.
362 funds tracked by Wall St. Rank held OSI Systems as of Q2 2026.

Based on Oberweis Asset Management's 13F filing for Q2 2026, filed 14 Aug 2026.