Ticker · CUSIP 84833T103

SPRO

SPERO THERAPEUTICS INC
···Share
Holders (tracked)
6
Combined shares
2,190,742
Combined value
$5.10M
Last close
Quarter
2025Q4
Tracked holders · last 8 quarters
+3 vs previous quarter over the last 8.
632024Q12025Q4

SEC event timeline

7 events
  1. +24,107 shares · 2025Q4
    13F
  2. +323,171 shares · 2025Q4
    13F
  3. +397,864 shares · 2025Q4
    13F
  4. +43,579 shares · 2025Q4
    13F
  5. −173,243 shares · 2025Q4
    13F
  6. +49,399 shares · 2025Q3
    13F
  7. +620,600 shares · 2025Q3
    13F

Insider activity

No insider transactions in the last 30 days.

Who moved on this name in 2025Q4

13F transactions reported for the latest quarter, grouped by direction.
Added to1
Trimmed1
Exited0

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q1
7
$18.2M
2022Q2
9
$2.5M
2022Q3
4
$4K
2022Q4
4
$915K
2023Q1
4
$758K
2023Q2
7
$1.4M
2023Q3
4
$749K
2023Q4
4
$974K
2024Q1
3
$1.1M
2024Q2
6
$2.4M
2024Q3
5
$1.5M
2024Q4
4
$1.3M
2025Q1
4
$750K
2025Q2
3
$3.1M
2025Q3
3
$2.9M
2025Q4
6
$5.1M

Who owns SPRO

6 super-investors · 2025Q4
Tracked stake
2.19M
shares
Combined value
$5M
% of shares outstanding
shares-out unknown
Quarter action mix
New4Added1Trim1
#ManagerSharesValue
1Renaissance Technologies1.28M$3M
2Ken Griffin
Citadel Advisors
397.9K$927K
3Two Sigma Investments372.6K$868K
4Ken Griffin
Citadel Advisors
73.1K$170K
5Steve Cohen
Point72
43.6K$102K
6Izzy Englander
Millennium Mgmt
24.1K$56K

Recent moves

20 transactions
Embed this chart
Paste this iframe anywhere to embed the live SPRO chart.
<iframe src="https://openstocks.me/embed/stock/SPRO" width="100%" height="480" frameborder="0" loading="lazy" title="SPRO chart by OpenStocks" style="border:0;border-radius:12px;background:transparent"></iframe>