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Granahan Investment Management’s Cytosorbents Corp CTSO Stock Holding History

Granahan Investment Management’s Portfolio CTSO Stock Details CTSO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q2 		– Sell
-358,418
Closed -$358K – 160
2025
Q1 		$358K Sell
358,418
-846,162
-70% -$892K 0.02% 152
2024
Q4 		$1.1M Sell
1,204,580
-890,302
-42% -$874K 0.05% 157
2024
Q3 		$3.14M Sell
2,094,882
-568,929
-21% -$624K 0.12% 151
2024
Q2 		$1.87M Sell
2,663,811
-381,022
-13% -$330K 0.07% 159
2024
Q1 		$2.89M Sell
3,044,833
-573,310
-16% -$558K 0.1% 151
2023
Q4 		$4.02M Buy
3,618,143
+2,065,750
+133% +$3.07M 0.13% 147
2023
Q3 		$2.92M Sell
1,552,393
-64,194
-4% -$184K 0.1% 148
2023
Q2 		$5.8M Buy
1,616,587
+49,047
+3% +$155K 0.18% 126
2023
Q1 		$5.28M Sell
1,567,540
-26,171
-2% -$78.5K 0.16% 124
2022
Q4 		$2.47M Buy
1,593,711
+82,682
+5% +$123K 0.08% 156
2022
Q3 		$2.06M Buy
1,511,029
+127,015
+9% +$248K 0.07% 158
2022
Q2 		$3.03M Buy
1,384,014
+168,086
+14% +$386K 0.1% 146
2022
Q1 		$3.88M Buy
1,215,928
+110,321
+10% +$395K 0.1% 144
2021
Q4 		$4.63M Sell
1,105,607
-48,954
-4% -$275K 0.1% 153
2021
Q3 		$9.38M Buy
1,154,561
+151,015
+15% +$1.23M 0.18% 117
2021
Q2 		$7.58M Buy
1,003,546
+91,392
+10% +$770K 0.14% 132
2021
Q1 		$7.92M Buy
912,154
+104,455
+13% +$996K 0.17% 107
2020
Q4 		$6.44M Buy
807,699
+175,664
+28% +$1.47M 0.14% 118
2020
Q3 		$5.04M Buy
632,035
+42,552
+7% +$384K 0.17% 106
2020
Q2 		$5.84M Sell
589,483
-101,647
-15% -$933K 0.21% 100
2020
Q1 		$5.34M Buy
691,130
+12,512
+2% +$63.2K 0.29% 87
2019
Q4 		$2.61M Buy
678,618
+13,914
+2% +$60.7K 0.12% 127
2019
Q3 		$3.34M Buy
664,704
+268,829
+68% +$1.56M 0.18% 110
2019
Q2 		$2.62M Buy
395,875
+70,223
+22% +$482K 0.13% 123
2019
Q1 		$2.46M Buy
325,652
+47,482
+17% +$370K 0.13% 137
2018
Q4 		$2.25M Buy
278,170
+90,870
+49% +$902K 0.16% 124
2018
Q3 		$2.42M Buy
+187,300
New +$2.35M 0.13% 141

Other funds holding CTSO

AC
Avenir Corporation Alexandria, Virginia $821M AUM 4.23% 1-Year Est. Return
SC
Skylands Capital Milwaukee, Wisconsin $814M AUM 32.37% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return
CM
CM Management Gulf Breeze, Florida $157M AUM 60.08% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
SIG
Sargent Investment Group Bethesda, Maryland $832M AUM 24.89% 1-Year Est. Return
CIBC Private Wealth Group
CIBC Private Wealth Group Atlanta, Georgia $59.2B AUM 20.62% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Granahan Investment Management's CTSO Position: Q2 2025 in Review

Granahan Investment Management sold out of Cytosorbents Corp (CTSO) in Q2 2025, closing a stake of 358,418 shares — an estimated $358K sold.

Granahan Investment Management first reported a position in CTSO in Q3 2018 and held it in 27 quarters. The position peaked at $9.38M in Q3 2021. 45 funds tracked by Wall St. Rank hold CTSO as of Q2 2025.

  • Granahan Investment Management reported no remaining Cytosorbents Corp position as of Q2 2025 after selling out during the quarter.
  • Granahan Investment Management sold 358,418 Cytosorbents Corp shares in Q2 2025, an estimated $358K.
  • Granahan Investment Management first reported a position in Cytosorbents Corp in Q3 2018 and held it in 27 quarters.
  • Granahan Investment Management's Cytosorbents Corp position peaked at $9.38M in Q3 2021.
  • 45 funds tracked by Wall St. Rank held Cytosorbents Corp as of Q2 2025.

Based on Granahan Investment Management's 13F filing for Q2 2025, filed 14 Aug 2025.