Impax Environmental Markets plc (IEM) Share Price & Analysis

Open: 448.00
High: 450.50
Low: 444.39
Close: 450.50
Change: -3.00 (-0.67%)
Volume: 133,693

Market Cap: £709m
1Y Performance: +0.1%
Avg Daily Volume: 1.1M

52-Week Range

379.00(19 Nov 25)473.50(18 Jun 26)

Current 450.50 · position in 52-week range

Going concern: Material uncertainty
Principal risks: 1 · 1 rising

28 Aug 2026	11:08:34	Net Asset Value(s)
27 Aug 2026	11:58:28	Net Asset Value(s)
26 Aug 2026	11:33:58	Net Asset Value(s)
25 Aug 2026	11:14:56	Net Asset Value(s)
24 Aug 2026	12:00:47	Net Asset Value(s)

8 Apr 2026	Annual Report
28 Apr 2025	Annual Report
12 Apr 2024	Annual report and notice of AGM

Glen SuarezChairman

–

Sanjeev LakhaniPortfolio Manager

–

Fotis ChatzimichalakisPortfolio Manager

–

Thomas Morris BrownPortfolio Specialist

–

Matt CarterHead of UK Intermediary Distribution, Client Group

–

Impax Environmental Markets plc (IEM) is an investment trust that focuses on environmental markets, investing primarily in quoted companies that derive significant revenues from sectors such as alternative energy, energy efficiency, water treatment, pollution control, and waste technology. The trust operates globally and targets long-term capital growth by capitalizing on the demand for cleaner and more efficient solutions to essential services. Its benchmark is the MSCI ACWI, reflecting its broad geographic and sectoral investment approach.

Industry: Financials
Sector: Financial Services
LEI: 213800RAR6ZDJLZDND86
Issuer: Impax Environmental Markets plc
Region: Europe
Admission date: 22 Feb 2002
Website: www.iemplc.co.uk
X: @IEMplc

NAV per Share: 506.28p
Discount/Premium: -11.4%

Dec 2020–Jul 2025 · Daily

Shares in issueas at 3 Aug 2026: 157,421,400
Total Voting Rights: 38,859,208
Treasury Shares: 118,562,192

Last updated: 28 August 2026

26/05/2026

29/08/2025

261,560£1.05M

28/08/2025

64,274£255,560

27/08/2025

500,000£1.99M

26/08/2025

324,752£1.29M

Latest year: FY20
Declared per share: 2.3p
Total paid: £5.3

ISIN: GB0031232498
Exchange: XLON
Market: Main Market
Market Segment: SSMM
Market Sector: SSC5
Security Description: Ordinary Shares of 10p each;fully paid
Listing Category: Closed-ended investment funds

Open: 448.00
High: 450.50
Low: 444.39
Close: 450.50
Change: -3.00 (-0.67%)
Volume: 133,693

Market Cap: £709m
1Y Performance: +0.1%
Avg Daily Volume: 1.1M

52-Week Range

379.00(19 Nov 25)473.50(18 Jun 26)

Current 450.50 · position in 52-week range

Going concern: Material uncertainty
Principal risks: 1 · 1 rising

28 Aug 2026	11:08:34	Net Asset Value(s)
27 Aug 2026	11:58:28	Net Asset Value(s)
26 Aug 2026	11:33:58	Net Asset Value(s)
25 Aug 2026	11:14:56	Net Asset Value(s)
24 Aug 2026	12:00:47	Net Asset Value(s)

8 Apr 2026	Annual Report
28 Apr 2025	Annual Report
12 Apr 2024	Annual report and notice of AGM

Glen SuarezChairman

–

Sanjeev LakhaniPortfolio Manager

–

Fotis ChatzimichalakisPortfolio Manager

–

Thomas Morris BrownPortfolio Specialist

–

Matt CarterHead of UK Intermediary Distribution, Client Group

–

Industry: Financials
Sector: Financial Services
LEI: 213800RAR6ZDJLZDND86
Issuer: Impax Environmental Markets plc
Region: Europe
Admission date: 22 Feb 2002
Website: www.iemplc.co.uk
X: @IEMplc

NAV per Share: 506.28p
Discount/Premium: -11.4%

Dec 2020–Jul 2025 · Daily

Shares in issueas at 3 Aug 2026: 157,421,400
Total Voting Rights: 38,859,208
Treasury Shares: 118,562,192

Last updated: 28 August 2026

26/05/2026

29/08/2025

261,560£1.05M

28/08/2025

64,274£255,560

27/08/2025

500,000£1.99M

26/08/2025

324,752£1.29M

Latest year: FY20
Declared per share: 2.3p
Total paid: £5.3

ISIN: GB0031232498
Exchange: XLON
Market: Main Market
Market Segment: SSMM
Market Sector: SSC5
Security Description: Ordinary Shares of 10p each;fully paid
Listing Category: Closed-ended investment funds

Open: 448.00
High: 450.50
Low: 444.39
Close: 450.50
Change: -3.00 (-0.67%)
Volume: 133,693

Market Cap: £709m
1Y Performance: +0.1%
Avg Daily Volume: 1.1M

52-Week Range

379.00(19 Nov 25)473.50(18 Jun 26)

Current 450.50 · position in 52-week range

Going concern: Material uncertainty
Principal risks: 1 · 1 rising

28 Aug 2026	11:08:34	Net Asset Value(s)
27 Aug 2026	11:58:28	Net Asset Value(s)
26 Aug 2026	11:33:58	Net Asset Value(s)
25 Aug 2026	11:14:56	Net Asset Value(s)
24 Aug 2026	12:00:47	Net Asset Value(s)

8 Apr 2026	Annual Report
28 Apr 2025	Annual Report
12 Apr 2024	Annual report and notice of AGM

Glen SuarezChairman

–

Sanjeev LakhaniPortfolio Manager

–

Fotis ChatzimichalakisPortfolio Manager

–

Thomas Morris BrownPortfolio Specialist

–

Matt CarterHead of UK Intermediary Distribution, Client Group

–

Industry: Financials
Sector: Financial Services
LEI: 213800RAR6ZDJLZDND86
Issuer: Impax Environmental Markets plc
Region: Europe
Admission date: 22 Feb 2002
Website: www.iemplc.co.uk
X: @IEMplc

Issuer	Mkt cap	1Y
PPET Patria Private Equity Trust PLC	£874m	+0.1%
GSCT The Global Smaller Companies Trust plc	£796m	+0.1%
HSL Henderson Smaller Companies Investment Trust plc	£736m	+0.2%
IEMImpax Environmental Markets plc	£709m	+0.1%
STS STS Global Income Growth Trust PLC	£401m	-0.1%
BGUK Baillie Gifford UK Growth Trust PLC	£255m	+0.1%

Peers in Financial Services, ranked by comparable market cap. 1Y = trailing share-price change.

NAV per Share: 506.28p
Discount/Premium: -11.4%

Dec 2020–Jul 2025 · Daily

Shares in issueas at 3 Aug 2026: 157,421,400
Total Voting Rights: 38,859,208
Treasury Shares: 118,562,192

Last updated: 28 August 2026

26/05/2026

29/08/2025

261,560£1.05M

28/08/2025

64,274£255,560

27/08/2025

500,000£1.99M

26/08/2025

324,752£1.29M

Latest year: FY20
Declared per share: 2.3p
Total paid: £5.3

ISIN: GB0031232498
Exchange: XLON
Market: Main Market
Market Segment: SSMM
Market Sector: SSC5
Security Description: Ordinary Shares of 10p each;fully paid
Listing Category: Closed-ended investment funds

Open: 448.00
High: 450.50
Low: 444.39
Close: 450.50
Change: -3.00 (-0.67%)
Volume: 133,693

Market Cap: £709m
1Y Performance: +0.1%
Avg Daily Volume: 1.1M

52-Week Range

379.00(19 Nov 25)473.50(18 Jun 26)

Current 450.50 · position in 52-week range

Going concern: Material uncertainty
Principal risks: 1 · 1 rising

28 Aug 2026	11:08:34	Net Asset Value(s)
27 Aug 2026	11:58:28	Net Asset Value(s)
26 Aug 2026	11:33:58	Net Asset Value(s)
25 Aug 2026	11:14:56	Net Asset Value(s)
24 Aug 2026	12:00:47	Net Asset Value(s)

8 Apr 2026	Annual Report
28 Apr 2025	Annual Report
12 Apr 2024	Annual report and notice of AGM

Glen SuarezChairman

–

Sanjeev LakhaniPortfolio Manager

–

Fotis ChatzimichalakisPortfolio Manager

–

Thomas Morris BrownPortfolio Specialist

–

Matt CarterHead of UK Intermediary Distribution, Client Group

–

Industry: Financials
Sector: Financial Services
LEI: 213800RAR6ZDJLZDND86
Issuer: Impax Environmental Markets plc
Region: Europe
Admission date: 22 Feb 2002
Website: www.iemplc.co.uk
X: @IEMplc

Issuer	Mkt cap	1Y
PPET Patria Private Equity Trust PLC	£874m	+0.1%
GSCT The Global Smaller Companies Trust plc	£796m	+0.1%
HSL Henderson Smaller Companies Investment Trust plc	£736m	+0.2%
IEMImpax Environmental Markets plc	£709m	+0.1%
STS STS Global Income Growth Trust PLC	£401m	-0.1%
BGUK Baillie Gifford UK Growth Trust PLC	£255m	+0.1%

Peers in Financial Services, ranked by comparable market cap. 1Y = trailing share-price change.

NAV per Share: 506.28p
Discount/Premium: -11.4%

Dec 2020–Jul 2025 · Daily

Shares in issueas at 3 Aug 2026: 157,421,400
Total Voting Rights: 38,859,208
Treasury Shares: 118,562,192

Last updated: 28 August 2026

26/05/2026

29/08/2025

261,560£1.05M

28/08/2025

64,274£255,560

27/08/2025

500,000£1.99M

26/08/2025

324,752£1.29M

Latest year: FY20
Declared per share: 2.3p
Total paid: £5.3

ISIN: GB0031232498
Exchange: XLON
Market: Main Market
Market Segment: SSMM
Market Sector: SSC5
Security Description: Ordinary Shares of 10p each;fully paid
Listing Category: Closed-ended investment funds

Issuer	Mkt cap	1Y
PPET Patria Private Equity Trust PLC	£874m	+0.1%
GSCT The Global Smaller Companies Trust plc	£796m	+0.1%
HSL Henderson Smaller Companies Investment Trust plc	£736m	+0.2%
IEMImpax Environmental Markets plc	£709m	+0.1%
STS STS Global Income Growth Trust PLC	£401m	-0.1%
BGUK Baillie Gifford UK Growth Trust PLC	£255m	+0.1%

Peers in Financial Services, ranked by comparable market cap. 1Y = trailing share-price change.

Issuer	Mkt cap	1Y
PPET Patria Private Equity Trust PLC	£874m	+0.1%
GSCT The Global Smaller Companies Trust plc	£796m	+0.1%
HSL Henderson Smaller Companies Investment Trust plc	£736m	+0.2%
IEMImpax Environmental Markets plc	£709m	+0.1%
STS STS Global Income Growth Trust PLC	£401m	-0.1%
BGUK Baillie Gifford UK Growth Trust PLC	£255m	+0.1%

Peers in Financial Services, ranked by comparable market cap. 1Y = trailing share-price change.

20 Jul 2026	Impax Environmental Markets launches search for new manager	QuotedData
14 Jul 2026	Investment trust fundraising more than doubles to £575m in first half of 2026 as discounts narrow	UK Investor Magazine
10 Jul 2026	Impax posts solid growth in assets under management	ShareCast
19 Jun 2026	Saba boots Impax Environmental Markets board in vote	Investors Chronicle
18 Jun 2026	Saba sweeps aside Impax board in landmark investment trust coup	The Armchair Trader
18 Jun 2026	Spotlight falls on Impax Environmental Markets new board as Saba boss Boaz Weinstein urges his independent nominees to appoint a new manager	QuotedData
17 Jun 2026	Trust boss hits out at City watchdog for allowing it to be taken over by US raider Saba Capital	This Is Money
17 Jun 2026	Morning briefing: Impax Environmental admits Saba will win control today; Saba ups SDCL stake before share plunge; Odyssean flags UK smaller company recovery after 25% return; Rockwood spies exceptional small-cap value; Tritax Big Box agrees second data centre build	QuotedData

20 Jul 2026	Impax Environmental Markets launches search for new manager	QuotedData
14 Jul 2026	Investment trust fundraising more than doubles to £575m in first half of 2026 as discounts narrow	UK Investor Magazine
10 Jul 2026	Impax posts solid growth in assets under management	ShareCast
19 Jun 2026	Saba boots Impax Environmental Markets board in vote	Investors Chronicle
18 Jun 2026	Saba sweeps aside Impax board in landmark investment trust coup	The Armchair Trader
18 Jun 2026	Spotlight falls on Impax Environmental Markets new board as Saba boss Boaz Weinstein urges his independent nominees to appoint a new manager	QuotedData
17 Jun 2026	Trust boss hits out at City watchdog for allowing it to be taken over by US raider Saba Capital	This Is Money
17 Jun 2026	Morning briefing: Impax Environmental admits Saba will win control today; Saba ups SDCL stake before share plunge; Odyssean flags UK smaller company recovery after 25% return; Rockwood spies exceptional small-cap value; Tritax Big Box agrees second data centre build	QuotedData

20 Jul 2026	Impax Environmental Markets launches search for new manager	QuotedData
14 Jul 2026	Investment trust fundraising more than doubles to £575m in first half of 2026 as discounts narrow	UK Investor Magazine
10 Jul 2026	Impax posts solid growth in assets under management	ShareCast
19 Jun 2026	Saba boots Impax Environmental Markets board in vote	Investors Chronicle
18 Jun 2026	Saba sweeps aside Impax board in landmark investment trust coup	The Armchair Trader
18 Jun 2026	Spotlight falls on Impax Environmental Markets new board as Saba boss Boaz Weinstein urges his independent nominees to appoint a new manager	QuotedData
17 Jun 2026	Trust boss hits out at City watchdog for allowing it to be taken over by US raider Saba Capital	This Is Money
17 Jun 2026	Morning briefing: Impax Environmental admits Saba will win control today; Saba ups SDCL stake before share plunge; Odyssean flags UK smaller company recovery after 25% return; Rockwood spies exceptional small-cap value; Tritax Big Box agrees second data centre build	QuotedData

20 Jul 2026	Impax Environmental Markets launches search for new manager	QuotedData
14 Jul 2026	Investment trust fundraising more than doubles to £575m in first half of 2026 as discounts narrow	UK Investor Magazine
10 Jul 2026	Impax posts solid growth in assets under management	ShareCast
19 Jun 2026	Saba boots Impax Environmental Markets board in vote	Investors Chronicle
18 Jun 2026	Saba sweeps aside Impax board in landmark investment trust coup	The Armchair Trader
18 Jun 2026	Spotlight falls on Impax Environmental Markets new board as Saba boss Boaz Weinstein urges his independent nominees to appoint a new manager	QuotedData
17 Jun 2026	Trust boss hits out at City watchdog for allowing it to be taken over by US raider Saba Capital	This Is Money
17 Jun 2026	Morning briefing: Impax Environmental admits Saba will win control today; Saba ups SDCL stake before share plunge; Odyssean flags UK smaller company recovery after 25% return; Rockwood spies exceptional small-cap value; Tritax Big Box agrees second data centre build	QuotedData