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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
-17,921
Closed -$358K – 160
2025
Q1 		$358K Sell
17,921
-42,308
-70% -$892K 0.02% 152
2024
Q4 		$1.1M Sell
60,229
-44,515
-42% -$874K 0.05% 157
2024
Q3 		$3.14M Sell
104,744
-28,447
-21% -$624K 0.12% 151
2024
Q2 		$1.87M Sell
133,191
-19,051
-13% -$330K 0.07% 159
2024
Q1 		$2.89M Sell
152,242
-28,665
-16% -$558K 0.1% 151
2023
Q4 		$4.02M Buy
180,907
+103,287
+133% +$3.07M 0.13% 147
2023
Q3 		$2.92M Sell
77,620
-3,209
-4% -$184K 0.1% 148
2023
Q2 		$5.8M Buy
80,829
+2,452
+3% +$155K 0.18% 126
2023
Q1 		$5.28M Sell
78,377
-1,309
-2% -$78.6K 0.16% 124
2022
Q4 		$2.47M Buy
79,686
+4,135
+5% +$123K 0.08% 156
2022
Q3 		$2.06M Buy
75,551
+6,350
+9% +$248K 0.07% 158
2022
Q2 		$3.03M Buy
69,201
+8,405
+14% +$386K 0.1% 146
2022
Q1 		$3.88M Buy
60,796
+5,516
+10% +$395K 0.1% 144
2021
Q4 		$4.63M Sell
55,280
-2,448
-4% -$275K 0.1% 153
2021
Q3 		$9.38M Buy
57,728
+7,551
+15% +$1.23M 0.18% 117
2021
Q2 		$7.58M Buy
50,177
+4,569
+10% +$770K 0.14% 132
2021
Q1 		$7.92M Buy
45,608
+5,223
+13% +$996K 0.17% 107
2020
Q4 		$6.44M Buy
40,385
+8,783
+28% +$1.47M 0.14% 118
2020
Q3 		$5.04M Buy
31,602
+2,128
+7% +$384K 0.17% 106
2020
Q2 		$5.84M Sell
29,474
-5,083
-15% -$934K 0.21% 100
2020
Q1 		$5.34M Buy
34,557
+626
+2% +$63.2K 0.29% 87
2019
Q4 		$2.61M Buy
33,931
+696
+2% +$60.7K 0.12% 127
2019
Q3 		$3.34M Buy
33,235
+13,441
+68% +$1.56M 0.18% 110
2019
Q2 		$2.62M Buy
19,794
+3,511
+22% +$482K 0.13% 123
2019
Q1 		$2.46M Buy
16,283
+2,374
+17% +$370K 0.13% 137
2018
Q4 		$2.25M Buy
13,909
+4,544
+49% +$902K 0.16% 124
2018
Q3 		$2.42M Buy
+9,365
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 $3.38T AUM 44.17% 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 17,921 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 17,921 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.