Alphabet Inc’s Spero Therapeutics SPRO Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2026
Q1
$2.08M Hold
889,979
0.05% 23
2025
Q4
$2.07M Hold
889,979
0.08% 23
2025
Q3
$1.67M Hold
889,979
0.07% 28
2025
Q2
$2.58M Hold
889,979
0.12% 22
2025
Q1
$641K Hold
889,979
0.04% 34
2024
Q4
$917K Hold
889,979
0.05% 31
2024
Q3
$1.19M Hold
889,979
0.06% 32
2024
Q2
$1.16M Hold
889,979
0.06% 34
2024
Q1
$1.53M Hold
889,979
0.06% 34
2023
Q4
$1.31M Hold
889,979
0.06% 35
2023
Q3
$1.08M Hold
889,979
0.07% 37
2023
Q2
$1.29M Hold
889,979
0.07% 36
2023
Q1
$1.29M Hold
889,979
0.07% 37
2022
Q4
$1.54M Hold
889,979
0.09% 39
2022
Q3
$1.78M Hold
889,979
0.09% 39
2022
Q2
$659K Hold
889,979
0.04% 49
2022
Q1
$7.74M Hold
889,979
0.25% 34
2021
Q4
$14.2M Hold
889,979
0.34% 33
2021
Q3
$16.4M Hold
889,979
0.39% 26
2021
Q2
$12.4M Hold
889,979
0.25% 26
2021
Q1
$13.1M Hold
889,979
0.53% 20
2020
Q4
$17.3M Sell
889,979
-222,494
-20% -$3.47M 0.83% 16
2020
Q3
$12.4M Hold
1,112,473
0.58% 12
2020
Q2
$15.1M Hold
1,112,473
0.69% 11
2020
Q1
$8.99M Hold
1,112,473
0.59% 13
2019
Q4
$10.7M Hold
1,112,473
0.65% 13
2019
Q3
$11.8M Hold
1,112,473
0.35% 9
2019
Q2
$12.8M Hold
1,112,473
0.24% 12
2019
Q1
$14.3M Hold
1,112,473
0.74% 11
2018
Q4
$6.84M Hold
1,112,473
0.81% 13
2018
Q3
$11.7M Hold
1,112,473
1.12% 13
2018
Q2
$16.3M Hold
1,112,473
1.37% 10
2018
Q1
$15.9M Hold
1,112,473
2.58% 8
2017
Q4
$13.1M Buy
+1,112,473
New +$13.7M 3.55% 5

Other funds holding SPRO

Alphabet Inc's SPRO Position: Q1 2026 in Review

Alphabet Inc held its Spero Therapeutics (SPRO) position steady in Q1 2026 at 889,979 shares worth $2.08M. The position accounts for 0.05% of the portfolio, ranked #23.

Alphabet Inc first reported a position in SPRO in Q4 2017 and has held it in 34 quarters since. The position peaked at $17.3M in Q4 2020. 50 funds tracked by Wall St. Rank hold SPRO as of Q1 2026.

  • Alphabet Inc held 889,979 shares of Spero Therapeutics worth $2.08M as of Q1 2026.
  • Alphabet Inc left its Spero Therapeutics share count unchanged in Q1 2026.
  • Spero Therapeutics made up 0.05% of Alphabet Inc's portfolio in Q1 2026, its #23 holding.
  • Alphabet Inc first reported a position in Spero Therapeutics in Q4 2017 and has held it in 34 quarters since.
  • Alphabet Inc's Spero Therapeutics position peaked at $17.3M in Q4 2020.
  • 50 funds tracked by Wall St. Rank held Spero Therapeutics as of Q1 2026.

Based on Alphabet Inc's 13F filing for Q1 2026, filed 8 May 2026.