Innospec (IOSP) Price/Book Ratio: History & Chart

Innospec Inc.(IOSP)

Chemicals - Specialty · Englewood, CO

$98.54+0.89 (+0.91%)

Delayed quote: Oct 6, 2026, 2:00 PM EDT

About Innospec Inc.

Innospec Inc., founded in 1938 as Octel Corp. and rebranded in January 2006, is a global company headquartered in Englewood, Colorado. It focuses on the creation, production, formulation, promotion, and distribution of unique chemical products. The company's operations span across the United States, the wider North American continent, the United Kingdom, continental Europe, and various international markets. Innospec's business is organized into distinct divisions. The Fuel Specialties segment provides a portfolio of specialized chemical additives engineered for various fuel applications. These crucial products are deployed in the functioning of engines for automobiles, maritime vessels, and aviation, as well as for electricity generators and heating oil systems. The Performance Chemicals division delivers sophisticated, technology-driven solutions designed to enhance customer processes or products. This unit primarily caters to sectors such as personal care, household products, agricultural chemicals, and metal recovery. Its Oilfield Services segment concentrates on developing and commercializing chemical solutions essential for fracturing, stimulating, and completing wells. This segment also supplies products that facilitate oil and gas extraction and prevent the loss of drilling mud during operations. Innospec sells its diverse range of products to a broad client base, including companies involved in oil and gas exploration and production, oil refining facilities, fuel producers and end-users, businesses in the personal care and home care industries, formulators of agrochemical and metal extraction products, and various other chemical and industrial enterprises.

Englewood, CO

2,450 employees

innospec.com

Basic Materials / Chemicals - Specialty

Sector: Basic Materials
Industry: Chemicals - Specialty
CEO: Patrick S. Williams

View full financials

IOSP PB Ratio Metrics

PB RATIO

1.81

PB RATIO AVG TTM

1.52

PB RATIO AVG 3Y

2.01

PB RATIO AVG 5Y

2.14

PB RATIO AVG 10Y

2.25

PB RATIO AVG 15Y

2.25

PB RATIO AVG 20Y

2.20

CURRENT VS TTM AVG

+19.34%

CURRENT VS 3Y AVG

-10.14%

CURRENT VS 5Y AVG

-15.53%

CURRENT VS 10Y AVG

-19.48%

CURRENT VS 15Y AVG

-19.63%

CURRENT VS 20Y AVG

-17.83%

SECTOR MEDIAN · BASIC MATERIALS

2.35

median of 125 covered companies

CURRENT VS SECTOR MEDIAN

-22.98%

vs the sector median at left

NAME	MARKET CAP	PB RATIO	TTM	3Y	5Y
Innospec Inc. (IOSP)	$2.43B	1.81	1.52	2.01	2.14
Kaiser Aluminum Corporation (KALU)vs ›	$2.53B	2.69	2.72	2.10	2.05
Endeavour Silver Corp. (EXK)vs ›	$2.58B	3.63	5.02	3.05	2.78
Perpetua Resources Corp. (PPTA)vs ›	$2.58B	3.59	3.79	5.54	4.24
WD-40 Company (WDFC)vs ›	$2.76B	9.92	10.77	13.20	13.32
Hawkins, Inc. (HWKN)vs ›	$2.78B	5.07	5.79	5.39	4.35
Minerals Technologies Inc. (MTX)vs ›	$2.05B	1.33	1.28	1.33	1.33
USA Rare Earth Inc (USAR)vs ›	$1.85B	0.73	2.96	4.43	595.85
Hycroft Mining Holding Corporation (HYMC)vs ›	$1.76B	7.01	12.54	8.82	13.93
United States Lime & Minerals, Inc. (USLM)vs ›	$3.15B	4.53	5.37	5.35	4.26

NAME

MARKET CAP

PB RATIO

TTM

Innospec Inc. (IOSP)

$2.43B

1.81

1.52

2.01

2.14

Kaiser Aluminum Corporation (KALU)vs ›

$2.53B

2.69

2.72

2.10

2.05

Endeavour Silver Corp. (EXK)vs ›

$2.58B

3.63

5.02

3.05

2.78

Perpetua Resources Corp. (PPTA)vs ›

$2.58B

3.59

3.79

5.54

4.24

WD-40 Company (WDFC)vs ›

$2.76B

9.92

10.77

13.20

13.32

Hawkins, Inc. (HWKN)vs ›

$2.78B

5.07

5.79

5.39

4.35

Minerals Technologies Inc. (MTX)vs ›

$2.05B

1.33

1.28

1.33

USA Rare Earth Inc (USAR)vs ›

$1.85B

0.73

2.96

4.43

595.85

Hycroft Mining Holding Corporation (HYMC)vs ›

$1.76B

7.01

12.54

8.82

13.93

United States Lime & Minerals, Inc. (USLM)vs ›

$3.15B

4.53

5.37

5.35

4.26

PB Ratio Formula & Definition

PB Ratio = Market Cap / (Total Shareholders' Equity − Preferred Stock)

The price-to-book ratio compares market capitalization to book value attributable to common shareholders (total equity minus preferred stock). Lower values can indicate a cheaper valuation relative to net assets.

PB Ratio FAQ

What is the P/B ratio for Innospec Inc. (IOSP)?

The P/B ratio for IOSP stock is 1.81.

Is Innospec Inc.'s P/B ratio high or low?

The P/B ratio of 1.81 is 16% below its estimated 5-year average of 2.14, around the middle of its estimated 5-year range (1.23–2.86).

What is the estimated TTM average P/B ratio for Innospec Inc. (IOSP)?

The estimated TTM average P/B ratio for IOSP stock is 1.52.

What is the estimated 3Y average P/B ratio for Innospec Inc. (IOSP)?

The estimated 3Y average P/B ratio for IOSP stock is 2.01.

What is the estimated 5Y average P/B ratio for Innospec Inc. (IOSP)?

The estimated 5Y average P/B ratio for IOSP stock is 2.14.

What is the estimated 10Y average P/B ratio for Innospec Inc. (IOSP)?

The estimated 10Y average P/B ratio for IOSP stock is 2.25.

What is the estimated 15Y average P/B ratio for Innospec Inc. (IOSP)?

The estimated 15Y average P/B ratio for IOSP stock is 2.25.

What is the estimated 20Y average P/B ratio for Innospec Inc. (IOSP)?

The estimated 20Y average P/B ratio for IOSP stock is 2.20.

DATE	PB RATIO
2026-10-05	1.80
2026-10-02	1.79
2026-10-01	1.75
2026-09-30	1.75
2026-09-29	1.78
2026-09-28	1.80
2026-09-25	1.82
2026-09-24	1.78
2026-09-23	1.78
2026-09-22	1.77
2026-09-21	1.70
2026-09-18	1.71
2026-09-17	1.71
2026-09-16	1.71
2026-09-15	1.69
2026-09-14	1.69
2026-09-11	1.71
2026-09-10	1.71
2026-09-09	1.72
2026-09-08	1.72
2026-09-04	1.73
2026-09-03	1.71
2026-09-02	1.72
2026-09-01	1.70
2026-08-31	1.73
2026-08-28	1.75
2026-08-27	1.75
2026-08-26	1.76
2026-08-25	1.74
2026-08-24	1.74
2026-08-21	1.72
2026-08-20	1.71
2026-08-19	1.72
2026-08-18	1.72
2026-08-17	1.73
2026-08-14	1.73
2026-08-13	1.73
2026-08-12	1.71
2026-08-11	1.73
2026-08-10	1.71
2026-08-07	1.70
2026-08-06	1.68
2026-08-05	1.70
2026-08-04	1.60
2026-08-03	1.58
2026-07-31	1.59
2026-07-30	1.59
2026-07-29	1.57
2026-07-28	1.59
2026-07-27	1.58
2026-07-24	1.57
2026-07-23	1.55
2026-07-22	1.58
2026-07-21	1.56
2026-07-20	1.55
2026-07-17	1.56
2026-07-16	1.58
2026-07-15	1.53
2026-07-14	1.51
2026-07-13	1.52
2026-07-10	1.51
2026-07-09	1.49
2026-07-08	1.49
2026-07-07	1.51
2026-07-06	1.52
2026-07-02	1.53
2026-07-01	1.51
2026-06-30	1.50
2026-06-29	1.49
2026-06-26	1.53
2026-06-25	1.53
2026-06-24	1.54
2026-06-23	1.51
2026-06-22	1.52
2026-06-18	1.53
2026-06-17	1.54
2026-06-16	1.55
2026-06-15	1.57
2026-06-12	1.60
2026-06-11	1.59
2026-06-10	1.54
2026-06-09	1.53
2026-06-08	1.50
2026-06-05	1.49
2026-06-04	1.49
2026-06-03	1.49
2026-06-02	1.51
2026-06-01	1.51
2026-05-29	1.53
2026-05-28	1.52
2026-05-27	1.52
2026-05-26	1.51
2026-05-22	1.47
2026-05-21	1.45
2026-05-20	1.45
2026-05-19	1.42
2026-05-18	1.46
2026-05-15	1.44
2026-05-14	1.48
2026-05-13	1.47
2026-05-12	1.49
2026-05-11	1.49
2026-05-08	1.51
2026-05-07	1.44
2026-05-06	1.45
2026-05-05	1.46
2026-05-04	1.43
2026-05-01	1.44
2026-04-30	1.43
2026-04-29	1.42
2026-04-28	1.44
2026-04-27	1.45
2026-04-24	1.44
2026-04-23	1.44
2026-04-22	1.40
2026-04-21	1.41
2026-04-20	1.41
2026-04-17	1.43
2026-04-16	1.41
2026-04-15	1.40
2026-04-14	1.41
2026-04-13	1.43
2026-04-10	1.42
2026-04-09	1.42
2026-04-08	1.42
2026-04-07	1.36
2026-04-06	1.35
2026-04-02	1.38
2026-04-01	1.38
2026-03-31	1.37
2026-03-30	1.37
2026-03-27	1.35
2026-03-26	1.36
2026-03-25	1.33
2026-03-24	1.27
2026-03-23	1.26
2026-03-20	1.23
2026-03-19	1.26
2026-03-18	1.26
2026-03-17	1.29
2026-03-16	1.28
2026-03-13	1.29
2026-03-12	1.29
2026-03-11	1.31
2026-03-10	1.32
2026-03-09	1.34
2026-03-06	1.35
2026-03-05	1.39
2026-03-04	1.44
2026-03-03	1.43
2026-03-02	1.44
2026-02-27	1.43
2026-02-26	1.45
2026-02-25	1.46
2026-02-24	1.49
2026-02-23	1.48
2026-02-20	1.52
2026-02-19	1.55
2026-02-18	1.66
2026-02-17	1.65
2026-02-13	1.66
2026-02-12	1.67
2026-02-11	1.70
2026-02-10	1.68
2026-02-09	1.65
2026-02-06	1.66
2026-02-05	1.65
2026-02-04	1.67
2026-02-03	1.61
2026-02-02	1.60
2026-01-30	1.57
2026-01-29	1.56
2026-01-28	1.52
2026-01-27	1.53
2026-01-26	1.54
2026-01-23	1.55
2026-01-22	1.57
2026-01-21	1.56
2026-01-20	1.52
2026-01-16	1.53
2026-01-15	1.57
2026-01-14	1.55
2026-01-13	1.54
2026-01-12	1.55
2026-01-09	1.54
2026-01-08	1.54
2026-01-07	1.51
2026-01-06	1.51
2026-01-05	1.50
2026-01-02	1.46
2025-12-31	1.47
2025-12-30	1.50
2025-12-29	1.51
2025-12-26	1.51
2025-12-24	1.50
2025-12-23	1.50
2025-12-22	1.50
2025-12-19	1.49
2025-12-18	1.52
2025-12-17	1.52
2025-12-16	1.50
2025-12-15	1.51
2025-12-12	1.50
2025-12-11	1.51
2025-12-10	1.51
2025-12-09	1.46
2025-12-08	1.44
2025-12-05	1.44
2025-12-04	1.42
2025-12-03	1.44
2025-12-02	1.43
2025-12-01	1.42
2025-11-28	1.44
2025-11-26	1.43
2025-11-25	1.43
2025-11-24	1.36
2025-11-21	1.39
2025-11-20	1.36
2025-11-19	1.36
2025-11-18	1.37
2025-11-17	1.39
2025-11-14	1.42
2025-11-13	1.44
2025-11-12	1.44
2025-11-11	1.45
2025-11-10	1.44
2025-11-07	1.47
2025-11-06	1.41
2025-11-05	1.43
2025-11-04	1.40
2025-11-03	1.42
2025-10-31	1.42
2025-10-30	1.41
2025-10-29	1.42
2025-10-28	1.45
2025-10-27	1.45
2025-10-24	1.48
2025-10-23	1.46
2025-10-22	1.47
2025-10-21	1.45
2025-10-20	1.44
2025-10-17	1.43
2025-10-16	1.43
2025-10-15	1.45
2025-10-14	1.44
2025-10-13	1.44
2025-10-10	1.43
2025-10-09	1.47
2025-10-08	1.52
2025-10-07	1.51
2025-10-06	1.52
2025-10-03	1.52
2025-10-02	1.52
2025-10-01	1.49
2025-09-30	1.49
2025-09-29	1.49
2025-09-26	1.50
2025-09-25	1.50
2025-09-24	1.52
2025-09-23	1.53

DATE

PB RATIO

2026-10-05

1.80

2026-10-02

1.79

2026-10-01

1.75

2026-09-30

1.75

2026-09-29

1.78

2026-09-28

1.80

2026-09-25

1.82

2026-09-24

1.78

2026-09-23

1.78

2026-09-22

1.77

2026-09-21

1.70

2026-09-18

1.71

2026-09-17

1.71

2026-09-16

1.71

2026-09-15

1.69

2026-09-14

1.69

2026-09-11

1.71

2026-09-10

1.71

2026-09-09

1.72

2026-09-08

1.72

2026-09-04

1.73

2026-09-03

1.71

2026-09-02

1.72

2026-09-01

1.70

2026-08-31

1.73

2026-08-28

1.75

2026-08-27

1.75

2026-08-26

1.76

2026-08-25

1.74

2026-08-24

1.74

2026-08-21

1.72

2026-08-20

1.71

2026-08-19

1.72

2026-08-18

1.72

2026-08-17

1.73

2026-08-14

1.73

2026-08-13

1.73

2026-08-12

1.71

2026-08-11

1.73

2026-08-10

1.71

2026-08-07

1.70

2026-08-06

1.68

2026-08-05

1.70

2026-08-04

1.60

2026-08-03

1.58

2026-07-31

1.59

2026-07-30

1.59

2026-07-29

1.57

2026-07-28

1.59

2026-07-27

1.58

2026-07-24

1.57

2026-07-23

1.55

2026-07-22

1.58

2026-07-21

1.56

2026-07-20

1.55

2026-07-17

1.56

2026-07-16

1.58

2026-07-15

1.53

2026-07-14

1.51

2026-07-13

1.52

2026-07-10

1.51

2026-07-09

1.49

2026-07-08

1.49

2026-07-07

1.51

2026-07-06

1.52

2026-07-02

1.53

2026-07-01

1.51

2026-06-30

1.50

2026-06-29

1.49

2026-06-26

1.53

2026-06-25

1.53

2026-06-24

1.54

2026-06-23

1.51

2026-06-22

1.52

2026-06-18

1.53

2026-06-17

1.54

2026-06-16

1.55

2026-06-15

1.57

2026-06-12

1.60

2026-06-11

1.59

2026-06-10

1.54

2026-06-09

1.53

2026-06-08

1.50

2026-06-05

1.49

2026-06-04

1.49

2026-06-03

1.49

2026-06-02

1.51

2026-06-01

1.51

2026-05-29

1.53

2026-05-28

1.52

2026-05-27

1.52

2026-05-26

1.51

2026-05-22

1.47

2026-05-21

1.45

2026-05-20

1.45

2026-05-19

1.42

2026-05-18

1.46

2026-05-15

1.44

2026-05-14

1.48

2026-05-13

1.47

2026-05-12

1.49

2026-05-11

1.49

2026-05-08

1.51

2026-05-07

1.44

2026-05-06

1.45

2026-05-05

1.46

2026-05-04

1.43

2026-05-01

1.44

2026-04-30

1.43

2026-04-29

1.42

2026-04-28

1.44

2026-04-27

1.45

2026-04-24

1.44

2026-04-23

1.44

2026-04-22

1.40

2026-04-21

1.41

2026-04-20

1.41

2026-04-17

1.43

2026-04-16

1.41

2026-04-15

1.40

2026-04-14

1.41

2026-04-13

1.43

2026-04-10

1.42

2026-04-09

1.42

2026-04-08

1.42

2026-04-07

1.36

2026-04-06

1.35

2026-04-02

1.38

2026-04-01

1.38

2026-03-31

1.37

2026-03-30

1.37

2026-03-27

1.35

2026-03-26

1.36

2026-03-25

1.33

2026-03-24

1.27

2026-03-23

1.26

2026-03-20

1.23

2026-03-19

1.26

2026-03-18

1.26

2026-03-17

1.29

2026-03-16

1.28

2026-03-13

1.29

2026-03-12

1.29

2026-03-11

1.31

2026-03-10

1.32

2026-03-09

1.34

2026-03-06

1.35

2026-03-05

1.39

2026-03-04

1.44

2026-03-03

1.43

2026-03-02

1.44

2026-02-27

1.43

2026-02-26

1.45

2026-02-25

1.46

2026-02-24

1.49

2026-02-23

1.48

2026-02-20

1.52

2026-02-19

1.55

2026-02-18

1.66

2026-02-17

1.65

2026-02-13

1.66

2026-02-12

1.67

2026-02-11

1.70

2026-02-10

1.68

2026-02-09

1.65

2026-02-06

1.66

2026-02-05

1.65

2026-02-04

1.67

2026-02-03

1.61

2026-02-02

1.60

2026-01-30

1.57

2026-01-29

1.56

2026-01-28

1.52

2026-01-27

1.53

2026-01-26

1.54

2026-01-23

1.55

2026-01-22

1.57

2026-01-21

1.56

2026-01-20

1.52

2026-01-16

1.53

2026-01-15

1.57

2026-01-14

1.55

2026-01-13

1.54

2026-01-12

1.55

2026-01-09

1.54

2026-01-08

1.54

2026-01-07

1.51

2026-01-06

1.51

2026-01-05

1.50

2026-01-02

1.46

2025-12-31

1.47

2025-12-30

1.50

2025-12-29

1.51

2025-12-26

1.51

2025-12-24

1.50

2025-12-23

1.50

2025-12-22

1.50

2025-12-19

1.49

2025-12-18

1.52

2025-12-17

1.52

2025-12-16

1.50

2025-12-15

1.51

2025-12-12

1.50

2025-12-11

1.51

2025-12-10

1.51

2025-12-09

1.46

2025-12-08

1.44

2025-12-05

1.44

2025-12-04

1.42

2025-12-03

1.44

2025-12-02

1.43

2025-12-01

1.42

2025-11-28

1.44

2025-11-26

1.43

2025-11-25

1.43

2025-11-24

1.36

2025-11-21

1.39

2025-11-20

1.36

2025-11-19

1.36

2025-11-18

1.37

2025-11-17

1.39

2025-11-14

1.42

2025-11-13

1.44

2025-11-12

1.44

2025-11-11

1.45

2025-11-10

1.44

2025-11-07

1.47

2025-11-06

1.41

2025-11-05

1.43

2025-11-04

1.40

2025-11-03

1.42

2025-10-31

1.42

2025-10-30

1.41

2025-10-29

1.42

2025-10-28

1.45

2025-10-27

1.45

2025-10-24

1.48

2025-10-23

1.46

2025-10-22

1.47

2025-10-21

1.45

2025-10-20

1.44

2025-10-17

1.43

2025-10-16

1.43

2025-10-15

1.45

2025-10-14

1.44

2025-10-13

1.44

2025-10-10

1.43

2025-10-09

1.47

2025-10-08

1.52

2025-10-07

1.51

2025-10-06

1.52

2025-10-03

1.52

2025-10-02

1.52

2025-10-01

1.49

2025-09-30

1.49

2025-09-29

1.49

2025-09-26

1.50

2025-09-25

1.50

2025-09-24

1.52

2025-09-23

1.53

PB Ratio: 1.81

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P/B vs. estimated history

Book Value Analysis

PB Ratio Formula & Definition

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