Spero Therapeutics (SPRO)

P/B ratio as of May 2026 : 5.46

According to Spero Therapeutics's latest financial reports the company has a price-to-book ratio of 4.93754.
The price-to-book ratio is a way to measure how much the stock market thinks a company is worth compared to how much the company says its assets are worth on paper.

Spero Therapeutics - P/B ratio (from 2017 to 2025)

P/B ratio by year

Year	P/B ratio	Change
2025-12-31	5.00	310.46%
2024-12-31	1.22	67.04%
2023-12-31	0.7288	-38.21%
2022-12-31	1.18	-79.92%
2021-12-31	5.87	36.71%
2020-12-31	4.30	73.66%
2019-12-31	2.47	170.9%
2018-12-31	0.9134	-54.04%
2017-12-31	1.99
2016-12-31	N/A

P/B ratio for similar companies or competitors

Company	P/B ratio	P/B ratio differencediff.	Country
IBM IBM	6.71	22.81%	🇺🇸 USA
Thomson Reuters TRI	3.56	-34.88%	🇨🇦 Canada
Franklin Covey FC	4.36	-20.13%	🇺🇸 USA

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

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Spero Therapeutics (SPRO) - P/B ratio