Citadel Advisors
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Citadel Advisors’s OSI Systems OSIS Stock Holding History

Citadel Advisors’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 		$1.41M Buy
5,300
+2,700
+104% +$746K ﹤0.01% 6865
2025
Q4 		$663K Sell
2,600
-100
-4% -$26.1K ﹤0.01% 8330
2025
Q3 		$673K Sell
2,700
-1,500
-36% -$342K ﹤0.01% 8424
2025
Q2 		$944K Buy
4,200
+1,100
+35% +$235K ﹤0.01% 7229
2025
Q1 		$602K Sell
3,100
-6,100
-66% -$1.16M ﹤0.01% 8073
2024
Q4 		$1.54M Buy
9,200
+5,300
+136% +$840K ﹤0.01% 6173
2024
Q3 		$592K Buy
3,900
+1,100
+39% +$158K ﹤0.01% 7908
2024
Q2 		$385K Buy
2,800
+300
+12% +$41.3K ﹤0.01% 8600
2024
Q1 		$357K Sell
2,500
-1,500
-38% -$197K ﹤0.01% 9099
2023
Q4 		$516K Buy
4,000
+300
+8% +$35.7K ﹤0.01% 8031
2023
Q3 		$437K Buy
3,700
+1,400
+61% +$169K ﹤0.01% 8365
2023
Q2 		$271K Sell
2,300
-5,100
-69% -$585K ﹤0.01% 9258
2023
Q1 		$757K Sell
7,400
-300
-4% -$27.8K ﹤0.01% 7393
2022
Q4 		$612K Sell
7,700
-2,600
-25% -$212K ﹤0.01% 7822
2022
Q3 		$742K Buy
10,300
+6,700
+186% +$587K ﹤0.01% 7642
2022
Q2 		$308K Buy
+3,600
New +$295K ﹤0.01% 9745
2021
Q4 		– Sell
-2,200
Closed -$209K – 14473
2021
Q3 		$209K Sell
2,200
-3,400
-61% -$331K ﹤0.01% 11900
2021
Q2 		$569K Hold
5,600
– – ﹤0.01% 9771
2021
Q1 		$538K Buy
5,600
+3,400
+155% +$323K ﹤0.01% 9520
2020
Q4 		$205K Sell
2,200
-4,700
-68% -$402K ﹤0.01% 9702
2020
Q3 		$536K Buy
6,900
+800
+13% +$59.7K ﹤0.01% 7174
2020
Q2 		$455K Sell
6,100
-7,200
-54% -$526K ﹤0.01% 7258
2020
Q1 		$917K Sell
13,300
-15,000
-53% -$1.28M ﹤0.01% 5503
2019
Q4 		$2.85M Buy
28,300
+8,800
+45% +$870K ﹤0.01% 3854
2019
Q3 		$1.98M Buy
19,500
+1,600
+9% +$173K ﹤0.01% 4501
2019
Q2 		$2.02M Buy
17,900
+13,600
+316% +$1.37M ﹤0.01% 4496
2019
Q1 		$377K Sell
4,300
-6,300
-59% -$527K ﹤0.01% 7261
2018
Q4 		$777K Buy
10,600
+2,300
+28% +$166K ﹤0.01% 5708
2018
Q3 		$633K Buy
8,300
+1,000
+14% +$77.6K ﹤0.01% 6320
2018
Q2 		$565K Sell
7,300
-7,300
-50% -$510K ﹤0.01% 6165
2018
Q1 		$953K Sell
14,600
-1,000
-6% -$64.9K ﹤0.01% 4885
2017
Q4 		$1M Buy
15,600
+6,600
+73% +$555K ﹤0.01% 4643
2017
Q3 		$822K Buy
9,000
+4,000
+80% +$325K ﹤0.01% 4589
2017
Q2 		$376K Buy
+5,000
New +$378K ﹤0.01% 5538
2016
Q3 		– Sell
-3,900
Closed -$227K – 7605
2016
Q2 		$227K Buy
3,900
+100
+3% +$5.51K ﹤0.01% 5645
2016
Q1 		$249K Buy
3,800
+3,200
+533% +$212K ﹤0.01% 5337
2015
Q4 		$53K Sell
600
-1,700
-74% -$149K ﹤0.01% 7267
2015
Q3 		$177K Sell
2,300
-900
-28% -$65K ﹤0.01% 6305
2015
Q2 		$227K Sell
3,200
-4,400
-58% -$318K ﹤0.01% 6152
2015
Q1 		$564K Sell
7,600
-2,200
-22% -$158K ﹤0.01% 4722
2014
Q4 		$694K Buy
9,800
+6,300
+180% +$430K ﹤0.01% 4256
2014
Q3 		$222K Sell
3,500
-5,900
-63% -$392K ﹤0.01% 5621
2014
Q2 		$627K Sell
9,400
-1,400
-13% -$83.5K ﹤0.01% 4107
2014
Q1 		$646K Buy
10,800
+2,700
+33% +$162K ﹤0.01% 3999
2013
Q4 		$430K Sell
8,100
-6,200
-43% -$424K ﹤0.01% 4196
2013
Q3 		$1.06M Sell
14,300
-8,100
-36% -$575K ﹤0.01% 3037
2013
Q2 		$1.44M Buy
+22,400
New +$1.31M ﹤0.01% 2803

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

Citadel Advisors's OSIS Position: Q1 2026 in Review

Citadel Advisors increased its OSI Systems (OSIS) stake by 1,112% in Q1 2026, buying an estimated $3.79M and bringing the position to 14,948 shares worth $3.97M. The position accounts for ﹤0.01% of the portfolio, ranked #4723.

Citadel Advisors first reported a position in OSIS in Q4 2013 and has held it in 45 quarters since. The position peaked at $14.7M in Q3 2019. 368 funds tracked by Wall St. Rank hold OSIS as of Q1 2026.

  • Citadel Advisors held 14,948 shares of OSI Systems worth $3.97M as of Q1 2026.
  • Citadel Advisors bought 13,715 OSI Systems shares in Q1 2026, an estimated $3.79M.
  • OSI Systems made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #4723 holding.
  • Citadel Advisors first reported a position in OSI Systems in Q4 2013 and has held it in 45 quarters since.
  • Citadel Advisors's OSI Systems position peaked at $14.7M in Q3 2019.
  • 368 funds tracked by Wall St. Rank held OSI Systems as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.