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S

Spero Therapeutics SPRO · USD

Health Care · US listing · 🇺🇸 United States

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1.07

+3.88%

Close of 9 Nov 2026, in USD

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Reference data, closing prices and charts across 45,000 companies, plus crypto, commodities and currencies.

Largest shareholders

As filed, so dates differ, and a group and its funds can both appear.

HolderSharesStakeChangeFiled
Pfizer Inc2.4m4.19%—30 Jun 2025
The Vanguard Group, Inc.2m3.46%+186.8k30 Jun 2025
Anson Funds Management LP.1.6m2.87%−2.2m30 Jun 2025
Alphabet, Inc.890k1.58%—30 Jun 2025
Renaissance Technologies LLC832.2k1.48%−138.7k30 Jun 2025
Schonfeld Strategic Advisors LLC510.8k0.91%+510.8k30 Jun 2025
Geode Capital Management, L.L.C.510.7k0.91%−14.2k30 Jun 2025
BlackRock Institutional Trust Company, N.A.433.5k0.77%−39.3k30 Jun 2025
Mahadevia (Ankit)364.2k0.65%−6.6k28 Aug 2025
Monimus Capital Management, LP310.9k0.55%—30 Jun 2025
The Informed Momentum Company LLC239.1k0.42%+239.1k30 Jun 2025
Stonepine Capital Management, LLC156.9k0.28%+156.9k30 Jun 2025
State Street Investment Management (US)153.5k0.27%+4.5k30 Jun 2025
IONIC Capital Management, L.L.C.150k0.27%+150k30 Jun 2025
Keutzer (Timothy)145.3k0.26%−1.7k28 Aug 2025

Short interest

Shares sold short, 15 Oct 2026. US exchange data.

840.5k

+5.8% on the period before. 1.5 days to cover.

Short volume

Share of the day's trading sold short, 4 Nov 2026

42.7%

Last 60 trading days.

Failed deliveries

Shares not delivered on settlement, from the SEC

  • 25 Aug 202615,213 shares
  • 20 Aug 202617 shares
  • 12 Aug 2026742 shares
  • 11 Aug 202628 shares
  • 10 Aug 202626,872 shares

Sources and methodology

Data on this tab
Our data supplier
Chart on the Overview
TradingView

Nothing here is investment advice. Prices can be delayed or wrong, so check with the exchange before relying on them. Data for this page. How we cover markets.