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Spero Therapeutics, Inc.

SPRO
Healthcare|Biotechnology|US
$1.03
+0.01 (+0.98%)
Tangible Book / Share
$0.76
Graham Number
$1.48
Cash / Share
$0.88
Next Earnings Report
Nov 12, 2026
EPS est. -$0.47
Financing Filings (last 12 months)
1
Shelf registrations / offering prospectuses — latest Aug 28, 2026 (S-3). Possible dilution.

Upcoming Data Readouts (0)

No upcoming completion dates found in active trials.

Recent Press Releases

Spero Therapeutics Announces Inducement Grant Under Nasdaq Listing Rule 5635(c)(4)
Nov 4, 2026 · GlobeNewsWire
Spero Therapeutics to Present at Investor Conferences in November
Nov 2, 2026 · GlobeNewsWire
Spero Therapeutics Strengthens Leadership Team to Advance Immunology Pipeline
Oct 26, 2026 · GlobeNewsWire
Spero Therapeutics to Participate in the Chardan 10th Annual Healthcare Conference
Oct 15, 2026 · GlobeNewsWire
Spero Therapeutics Announces Inducement Grants Under Nasdaq Listing Rule 5635(c)(4)
Oct 2, 2026 · GlobeNewsWire
Spero Therapeutics Announces Inducement Grant Under Nasdaq Listing Rule 5635(c)(4)
Sep 3, 2026 · GlobeNewsWire
Spero Therapeutics to Present at H.C. Wainwright 28th Annual Global Investment Conference
Sep 2, 2026 · GlobeNewsWire
Spero Therapeutics Announces Second Quarter 2026 Operating Results and Provides Business Update
Aug 12, 2026 · GlobeNewsWire

SEC Filings (43)

Last two years from EDGAR. Insider Form 4s are on the Ownership tab.

FiledFormWhat it isLinks
Oct 28, 2026S-8Employee stock planDocumentIndex
Oct 27, 20268-KMaterial eventDocumentIndex
Sep 10, 2026EFFECTDocumentIndex
Aug 28, 20268-KMaterial eventDocumentIndex
Aug 28, 2026S-3Shelf registrationDocumentIndex
Aug 12, 20268-KMaterial eventDocumentIndex
Aug 12, 202610-QQuarterly reportDocumentIndex
Jul 14, 20268-KMaterial eventDocumentIndex
Jun 25, 20268-KMaterial eventDocumentIndex
Jun 23, 2026S-8Employee stock planDocumentIndex
Jun 22, 20268-KMaterial eventDocumentIndex
May 13, 202610-QQuarterly reportDocumentIndex
May 13, 20268-KMaterial eventDocumentIndex
Apr 27, 2026ARSAnnual report to holdersDocumentIndex
Apr 27, 2026DEFA14AProxy / shareholder voteDocumentIndex
Apr 27, 2026DEF 14AProxy / shareholder voteDocumentIndex
Apr 13, 2026PRE 14AProxy / shareholder voteDocumentIndex
Mar 26, 20268-KMaterial eventDocumentIndex
Mar 26, 202610-KAnnual reportDocumentIndex
Jan 30, 20268-KMaterial eventDocumentIndex
Dec 19, 20258-KMaterial eventDocumentIndex
Nov 13, 20258-KMaterial eventDocumentIndex
Nov 13, 202510-QQuarterly reportDocumentIndex
Aug 14, 2025SC 13G/APassive 5%+ stakeDocumentIndex
Aug 12, 2025S-8Employee stock planDocumentIndex
Aug 12, 202510-QQuarterly reportDocumentIndex
Aug 12, 20258-KMaterial eventDocumentIndex
Jun 18, 20258-KMaterial eventDocumentIndex
May 28, 20258-KMaterial eventDocumentIndex
May 13, 20258-KMaterial eventDocumentIndex
May 13, 202510-QQuarterly reportDocumentIndex
Apr 28, 2025ARSAnnual report to holdersDocumentIndex
Apr 28, 2025DEFA14AProxy / shareholder voteDocumentIndex
Apr 28, 2025DEF 14AProxy / shareholder voteDocumentIndex
Apr 28, 20258-KMaterial eventDocumentIndex
Mar 28, 2025SC 13D/AActivist / 5%+ stakeDocumentIndex
Mar 27, 20258-KMaterial eventDocumentIndex
Mar 27, 202510-KAnnual reportDocumentIndex
Feb 28, 20258-KMaterial eventDocumentIndex
Jan 10, 20258-KMaterial eventDocumentIndex