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PDT Partners’s OSI Systems OSIS Stock Holding History

PDT Partners’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
Q1 		$11.2M Hold
42,104
– – 0.66% 29
2025
Q4 		$10.7M Hold
42,104
– – 0.7% 19
2025
Q3 		$10.5M Hold
42,104
– – 0.66% 20
2025
Q2 		$9.47M Buy
42,104
+15,108
+56% +$3.22M 0.54% 26
2025
Q1 		$5.25M Buy
26,996
+22,795
+543% +$4.34M 0.37% 64
2024
Q4 		$703K Buy
+4,201
New +$666K 0.06% 410
2020
Q2 		– Sell
-24,120
Closed -$1.66M – 772
2020
Q1 		$1.66M Sell
24,120
-980
-4% -$83.8K 0.13% 173
2019
Q4 		$2.53M Sell
25,100
-25
-0.1% -$2.47K 0.16% 172
2019
Q3 		$2.55M Buy
25,125
+9,025
+56% +$975K 0.15% 171
2019
Q2 		$1.81M Sell
16,100
-3,800
-19% -$383K 0.11% 197
2019
Q1 		$1.74M Buy
+19,900
New +$1.67M 0.1% 212
2018
Q2 		– Sell
-28,074
Closed -$1.83M – 560
2018
Q1 		$1.83M Sell
28,074
-38,226
-58% -$2.48M 0.06% 284
2017
Q4 		$4.27M Buy
66,300
+54,035
+441% +$4.54M 0.12% 206
2017
Q3 		$1.12M Buy
+12,265
New +$997K 0.04% 343
2015
Q2 		– Sell
-9,842
Closed -$731K – 1557
2015
Q1 		$731K Buy
9,842
+3,437
+54% +$246K 0.02% 888
2014
Q4 		$453K Buy
6,405
+2,176
+51% +$148K 0.04% 466
2014
Q3 		$268K Sell
4,229
-6,400
-60% -$425K 0.01% 1124
2014
Q2 		$709K Sell
10,629
-6,002
-36% -$358K 0.02% 824
2014
Q1 		$996K Buy
+16,631
New +$995K 0.02% 677

Other funds holding OSIS

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Janus Henderson Group
Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Mawer Investment Management
Mawer Investment Management Calgary, Alberta, Canada $15.4B AUM 10.9% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Capital International Investors
Capital International Investors Los Angeles, California $427B AUM 29.17% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
UBS AM
UBS AM Chicago, Illinois $481B AUM 26.39% 1-Year Est. Return

PDT Partners's OSIS Position: Q1 2026 in Review

PDT Partners held its OSI Systems (OSIS) position steady in Q1 2026 at 42,104 shares worth $11.2M. The position accounts for 0.66% of the portfolio, ranked #29.

PDT Partners first reported a position in OSIS in Q1 2014 and has held it in 19 quarters since. 368 funds tracked by Wall St. Rank hold OSIS as of Q1 2026.

  • PDT Partners held 42,104 shares of OSI Systems worth $11.2M as of Q1 2026.
  • PDT Partners left its OSI Systems share count unchanged in Q1 2026.
  • OSI Systems made up 0.66% of PDT Partners's portfolio in Q1 2026, its #29 holding.
  • PDT Partners first reported a position in OSI Systems in Q1 2014 and has held it in 19 quarters since.
  • 368 funds tracked by Wall St. Rank held OSI Systems as of Q1 2026.

Based on PDT Partners's 13F filing for Q1 2026, filed 15 May 2026.