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NASDAQ: SPRO
Spero Therapeutics Inc Stock Ownership - Who owns Spero Therapeutics?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Spero Therapeutics Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Esther RajaveluChief Executive Officer Chief Financial Officer and Chief Business Officer2026-05-0425,240$2.51
$63.35kSell
Esther RajaveluChief Executive Officer Chief Financial Officer and Chief Business Officer2026-02-0637,101$2.36
$87.56kSell
Esther RajaveluChief Executive Officer Chief Financial Officer and Chief Business Officer2026-02-0650,816$2.36
$119.93kSell
Timothy KeutzerChief Operating Officer2026-02-0618,652$2.36
$44.02kSell
Timothy KeutzerChief Operating Officer2026-02-043,471$2.24
$7.78kSell
Timothy KeutzerChief Operating Officer2026-02-0324,224$2.14
$51.84kSell
Timothy KeutzerChief Operating Officer2026-02-0218,891$2.20
$41.56kSell
Esther RajaveluChief Executive Officer Chief Financial Officer and Chief Business Officer2026-02-0218,442$2.20
$40.57kSell
Esther RajaveluChief Executive Officer Chief Financial Officer and Chief Business Officer2025-11-0740,270$2.37
$95.44kSell

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Net Insider Buy/Sell (L12M) Ownership

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SPRO Shareholders

What type of owners hold Spero Therapeutics Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Aquilo Capital Management LLC19.93%11,606,674$13.58MInsider
Gsk PLC15.78%9,190,606$10.75MInsider
Glaxosmithkline PLC6.50%3,788,012$4.43MInsider
Jean Francois Formela4.14%2,408,128$2.82MInsider
Vikas Goyal3.18%1,854,006$2.17MInsider
Sath Shukla2.98%1,736,883$2.03MInsider
Casper Breum1.87%1,091,774$1.28MInsider
Esther Rajavelu1.69%986,851$1.15MInsider
Kamal Hamed1.35%788,117$922.10kInsider
Timothy Keutzer1.28%742,506$868.73kInsider

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SPRO vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
SPRO0.04%62.43%Net Selling
GOSS1.04%98.96%
PTHS0.02%99.98%Net BuyingNet Selling
TELO0.00%23.07%Net Buying
ALGS0.01%99.99%
View Top Biotech Stocks

Spero Therapeutics Stock Ownership FAQ

Who owns Spero Therapeutics?

Spero Therapeutics (NASDAQ: SPRO) is owned by 0.04% institutional shareholders, 62.43% Spero Therapeutics insiders, and 37.54% retail investors. Aquilo Capital Management LLC is the largest individual Spero Therapeutics shareholder, owning 11.61M shares representing 19.93% of the company. Aquilo Capital Management LLC's Spero Therapeutics shares are currently valued at $12.88M.

If you're new to stock investing, here's how to buy Spero Therapeutics stock.
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