Group One Trading
SPRO icon

Group One Trading’s Spero Therapeutics SPRO Stock Holding History

Group One Trading’s Portfolio SPRO Stock Details SPRO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$16.4K Buy
7,000
+5,900
+536% +$14K ﹤0.01% 6087
2025
Q4 		$2.56K Sell
1,100
-94,200
-99% -$219K ﹤0.01% 7461
2025
Q3 		$179K Sell
95,300
-26,800
-22% -$58.9K ﹤0.01% 4779
2025
Q2 		$354K Buy
+122,100
New +$176K ﹤0.01% 3759
2024
Q1 		– Sell
-20,000
Closed -$29.4K – 7918
2023
Q4 		$29.4K Sell
20,000
-40,000
-67% -$47.7K ﹤0.01% 5462
2023
Q3 		$72.6K Sell
60,000
-60,000
-50% -$83.1K ﹤0.01% 4756
2023
Q2 		$174K Buy
120,000
+20,000
+20% +$34.2K ﹤0.01% 4087
2023
Q1 		$145K Buy
100,000
+18,600
+23% +$31.1K ﹤0.01% 3966
2022
Q4 		$141K Sell
81,400
-44,100
-35% -$82.3K ﹤0.01% 4147
2022
Q3 		$251K Buy
+125,500
New +$125K ﹤0.01% 3925
2022
Q2 		– Sell
-1,700
Closed -$15K – 8486
2022
Q1 		$15K Sell
1,700
-300
-15% -$3.07K ﹤0.01% 6960
2021
Q4 		$32K Buy
2,000
+600
+43% +$9.53K ﹤0.01% 6683
2021
Q3 		$26K Buy
+1,400
New +$22.5K ﹤0.01% 7020
2021
Q2 		– Sell
-8,500
Closed -$125K – 8552
2021
Q1 		$125K Buy
8,500
+8,000
+1,600% +$141K ﹤0.01% 5452
2020
Q4 		$10K Buy
+500
New +$7.79K ﹤0.01% 5795
2019
Q4 		– Sell
-100
Closed -$1K – 5589
2019
Q3 		$1K Hold
100
– – ﹤0.01% 5008
2019
Q2 		$1K Hold
100
– – ﹤0.01% 4833
2019
Q1 		$1K Buy
+100
New +$1.06K ﹤0.01% 4673

Other funds holding SPRO

GP
GSK plc London $599M AUM
P
Pfizer New York $239M AUM 232.47% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return
AI
Alphabet Inc Mountain View, California $4.02B AUM 215.74% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return
AFM
Anson Funds Management Dallas, Texas $2.29B AUM 370.24% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

Group One Trading's SPRO Position: Q4 2025 in Review

Group One Trading sold out of Spero Therapeutics (SPRO) in Q4 2025, closing a stake of 16,879 shares — an estimated $39.2K sold.

Group One Trading first reported a position in SPRO in Q4 2018 and held it in 15 quarters. The position peaked at $133K in Q2 2023. 56 funds tracked by Wall St. Rank hold SPRO as of Q4 2025.

  • Group One Trading reported no remaining Spero Therapeutics position as of Q4 2025 after selling out during the quarter.
  • Group One Trading sold 16,879 Spero Therapeutics shares in Q4 2025, an estimated $39.2K.
  • Group One Trading first reported a position in Spero Therapeutics in Q4 2018 and held it in 15 quarters.
  • Group One Trading's Spero Therapeutics position peaked at $133K in Q2 2023.
  • 56 funds tracked by Wall St. Rank held Spero Therapeutics as of Q4 2025.

Based on Group One Trading's 13F filing for Q4 2025, filed 12 Feb 2026.