Spero Therapeutics, Inc.

Spero Therapeutics, Inc.

SPRO
Spero Therapeutics, Inc.US flagNASDAQ Global Select
2.83
USD
- -
- -
163.86MMarket Cap
2015 Y
2016 Y
2017 Y
2018 Y
2019 Y
2020 Y
2021 Y
2022 Y
2023 Y
2024 Y
2025 Y
TTM
Revenue per Share
- -
- -
- -
- -
0.26
0.01
0.1
1.29
1.84
0.51
1.06
0.97
Basic EPS, GAAP
-1.68
-4.38
-17.35
-2.6
-3.35
-3.52
-2.91
-1.23
0.43
-1.27
0.15
0.27
Free Cash Flow per Basic Share
-1.49
-4.51
-15.13
-2.63
-2.77
-3.84
-2.08
-0.21
-0.63
-0.43
-0.23
0.13
Dividend per Share
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
Book Value per Share
-2.74
-6.88
-37.43
-8.65
-10.98
-12.4
-11.89
-11.01
-7.42
-8.5
-8.05
-8.12
Tangible Book Value per Share
-2.81
-6.26
32.84
7.24
4.11
5.9
2.86
2.02
2.03
0.85
1.05
0.94
Basic Weighted Avg Shares
7
7
3
16
18
22
31
38
53
54
56
56
Sales/Revenue/Turnover
- -
- -
- -
- -
5
- -
3
49
97
27
60
55
Operating Margin (%)
- -
- -
- -
- -
-1,333.11
-30,663.95
-2,865.5
-62.92
27.69
-264.58
12.01
25.89
Depreciation Expense
- -
- -
- -
- -
1
1
1
1
- -
- -
- -
- -
Net Income, GAAP
-10
-25
-39
-42
-61
-78
-90
-46
23
-69
9
15
Effective Tax Rate (%)
- -
- -
- -
- -
- -
- -
- -
- -
10.23
- -
2.95
1.68
Profit Margin (%)
- -
- -
- -
- -
-1,284.8
-30,341.09
-2,923.65
-95.55
23.58
-250.28
14.38
27.82
Working Capital
- -
5
84
112
69
125
139
92
94
58
58
52
LT Debt
- -
- -
- -
- -
5
7
6
5
4
3
1
1
Total Equity
- -
6
85
116
75
132
88
76
107
46
59
53
Return on Invested Capital (%)
- -
- -
- -
- -
- -
- -
- -
- -
24.61
- -
12.31
29.81
Return on Capital (%)
- -
- -
- -
- -
- -
- -
- -
- -
-5.75
- -
-1.9
-3.29
Return on Common Equity (%)
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -

Capital Structure

FRC

in mil. unless spec.
Sep'25
Dec'25
Mar'26
ST Debt
2
2
2
LT Borrowings
- -
- -
- -
LT Finance Leases
1
1
1
Preferred Equity and Hybrid Capital
- -
- -
- -
Shares Outstanding
56
56
58
Market Capitalization
104
130
132

Working Capital

FRC

in mil. unless spec.
Sep'25
Dec'25
Mar'26
Total Current Assets
52
67
58
Cash, Cash Equivalents & STI
49
40
56
Accounts Receivable, Net
- -
- -
- -
Inventories
- -
- -
- -
Total Current Liabilities
14
9
5
Payables & Accruals
9
7
4
ST Debt
2
2
2
Deferred Revenue
2
- -
- -

Growth Rates

FRC

in mil. unless spec.

(avg. rate of change)

10 years
5 years
1 year
Total Equity
-129.7%
-7.05%
27.96%
Free Cash Flow
47.07%
27.7%
-46.15%
Net Income, GAAP
-41.06%
-139.18%
-112.5%
Sales/Revenue/Turnover
- -
543.47%
117.62%
Total Cash Common Dividend
- -
- -
- -

Quarterly Revenue

FRC

in mil. unless spec.

Year

Q1
Q2
Q3
Q4
FY
2024
4
6
8
9
27
2025
5
12
3
40
60
2026
- -
- -
- -
- -
- -

Quarterly Earnings Per Share

FRC

in mil. unless spec.

Year

Q1
Q2
Q3
Q4
FY
2024
-0.24
-0.33
-0.32
-0.38
-1.27
2025
-0.25
-0.03
-0.13
0.56
0.15
2026
-0.13
- -
- -
- -
- -

Quarterly Dividends Per Share

FRC

in mil. unless spec.

Year

Q1
Q2
Q3
Q4
FY
2024
- -
- -
- -
- -
- -
2025
- -
- -
- -
- -
- -
2026
- -
- -
- -
- -
- -

Company Description

APIChat
CEO
Esther Rajavelu
Full Time Employees
32
Sector
Healthcare
Industry
Biotechnology
Address
675 Massachusetts Avenue Cambridge MA United States of America 02139
IPO Date
Nov 2, 2017
Business
Spero Therapeutics, Inc. is a clinical-stage biopharmaceutical company specializing in the development and commercialization of novel treatments for rare diseases and serious bacterial infections caused by multi-drug resistant (MDR) Gram-negative pathogens. The company's core product candidates include tebipenem HBr, an investigational oral carbapenem antibiotic targeting complicated urinary tract infections (cUTI) including acute pyelonephritis, intended as an effective outpatient oral therapy alternative to intravenous treatments; and SPR720, a prodrug antibiotic developed for the treatment of nontuberculous mycobacterial (NTM) pulmonary disease, which the company discontinued in 2025 following a review of clinical data. Spero also focuses on other pipeline programs addressing MDR bacterial infections through innovative mechanisms aimed at reducing virulence and persistence of pathogens such as Pseudomonas aeruginosa. Founded in 2014 and headquartered in Cambridge, Massachusetts, Spero Therapeutics operates primarily in the United States with strategic partnerships and licensing agreements extending its geographic reach. A significant recent development includes its collaboration with GlaxoSmithKline (GSK), which acquired exclusive rights outside certain Asian territories for tebipenem HBr in 2022, with plans to commercialize the product globally. In 2025, the Phase 3 PIVOT-PO trial for tebipenem HBr was stopped early due to meeting primary efficacy endpoints, demonstrating non-inferiority to intravenous imipenem-cilastatin in hospitalized patients with cUTI. This trial success positions tebipenem HBr for an anticipated FDA submission in the fourth quarter of 2025 and potential regulatory approval by the second half of 2026, marking a critical strategic milestone for Spero. The company has since discontinued development of SPR720 but continues to focus on advancing tebipenem HBr and its broader pipeline of treatments addressing antibiotic resistance challenges. Spero Therapeutics’ strategic direction emphasizes advancing oral antibiotic therapies for difficult-to-treat infections, leveraging partnerships for regulatory and commercial support while maintaining a pipeline of early-stage and clinical-stage assets targeting high unmet medical needs. The company is publicly traded under the ticker symbol SPRO on the NASDAQ and maintains a strong cash position to support its clinical development and operational activities. Its operational strategy combines proprietary research with collaborative development to drive innovation in anti-infective therapies. This description encompasses Spero Therapeutics’ current business focus, product portfolio including tebipenem HBr and discontinued SPR720, recent strategic partnership with GSK, clinical trial progress, and financial positioning as of late 2025. Sources confirm the Phase 3 trial achievements, partnership details, pipeline updates, and strategic shifts within the last two years.

Company News

APIChat
  • Spero Therapeutics Announces First Quarter 2026 Operating Results and Provides Business Update

  • Spero Therapeutics to Report First Quarter 2026 Financial Results and Provide Business Update on May 13, 2026

  • Spero Therapeutics (NASDAQ:SPRO) versus Mereo BioPharma Group (NASDAQ:MREO) Financial Contrast

  • Spero Therapeutics Announces Fourth Quarter and Full Year 2025 Operating Results and Provides a Business Update

  • Spero Therapeutics to Report Fourth Quarter and Full Year 2025 Financial Results and Provide Business Update on March 26, 2026

  • Spero Therapeutics: Tebipenem's FDA Path Supports A Speculative Buy

  • Spero Therapeutics (NASDAQ:SPRO) Stock Price Crosses Below 200 Day Moving Average – What’s Next?

  • Spero Announces NDA Resubmission of Tebipenem HBr by GSK to the FDA for the Treatment of Complicated Urinary Tract Infections, Including Pyelonephritis

  • Spero Therapeutics Announces Inducement Grant Under Nasdaq Listing Rule 5635(c)(4)

  • Spero Therapeutics Announces Third Quarter 2025 Operating Results and Provides a Business Update

  • Spero Therapeutics to Report Third Quarter 2025 Financial Results and Provide Business Update on November 13, 2025

  • PIVOT-PO Phase 3 Data Show Tebipenem HBr's Potential as the First Oral Carbapenem Antibiotic for Patients with Complicated Urinary Tract Infections (cUTIs)

  • Spero Therapeutics Announces Presentations on Tebipenem Hbr at IDWeek

  • Best Momentum Stock to Buy for October 10th

  • Down 17.7% in 4 Weeks, Here's Why Spero Therapeutics (SPRO) Looks Ripe for a Turnaround

  • Spero Therapeutics, Inc. (SPRO) Q2 2025 Earnings Call Transcript

  • Spero Therapeutics Announces Second Quarter 2025 Operating Results and Provides a Business Update

  • Spero Therapeutics to Report Second Quarter 2025 Financial Results and Provide Business Update on Tuesday, August 12, 2025

  • Spero Therapeutics -- Additional Upside Potential Following Positive Phase 3 Results

  • Squarepoint Ops LLC Buys Shares of 55,051 Spero Therapeutics, Inc. (NASDAQ:SPRO)