These were the worst performing ASX 200 shares in May

These shares were sold off last month…

a man clasps his hand to his forehead as he looks down at his phone and grimaces with a pained expression on his face as he watches the Pilbara Minerals share price continue to fall

Image source: Getty Images

You’re reading a free article with opinions that may differ from The Motley Fool’s Premium Investing Services. Become a Motley Fool member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn More

It was a month to forget for the S&P/ASX 200 Index (ASX: XJO) in May. During the period, the benchmark index fell a sizeable 3% to 7,229 points.

While a good number of shares fell with the market, some dropped more than most. Here's why these were the worst performers on the ASX 200 last month:

Tabcorp Holdings Limited (ASX: TAH)

The Tabcorp share price was the worst performer on the ASX 200 last month by some distance with its 81.5% decline. This was driven by the demerger of its lottery and Keno businesses into a separate listed entity – The Lottery Corporation Limited (ASX: TLC). New Tabcorp is left with its wagering, media, and gaming services businesses.

CSR Limited (ASX: CSR)

The CSR share price was a very poor performer and sank 24% during the month. There were a couple of a catalysts for the weakness in the building products company's shares. One was a lukewarm reaction to the company's results, which saw both Jefferies and Macquarie downgrade their recommendations. The other was its shares trading ex-dividend for its 18 cents per share fully franked dividend.

Novonix Ltd (ASX: NVX)

The Novonix share price wasn't far behind with a 21.8% decline in May. This was despite there being no real news out of the battery materials and technology company. Unfortunately for shareholders, this latest decline means that the Novonix share price is down 61% since the start of the year. Valuation concerns appear to be weighing on its shares.

AVZ Minerals Ltd (ASX: AVZ)

The AVZ Minerals share price was sold off and dropped 21.2% last month. Investors were selling this lithium developer's shares after the release of an update on its Manono Lithium Project in the Democratic Republic of the Congo. Although AVZ revealed that a mining licence has been granted, it dropped a bombshell. AVZ advised that it is facing an ownership dispute for the project, which could see the company ultimately owning just 36% of it.

Motley Fool contributor James Mickleboro has no position in any of the stocks mentioned. The Motley Fool Australia's parent company Motley Fool Holdings Inc. has no position in any of the stocks mentioned. The Motley Fool Australia has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy. This article contains general investment advice only (under AFSL 400691). Authorised by Scott Phillips.

More on Share Fallers

a business man in a suit holds his hand over his eyes as he bows his head in a defeated post suggesting regret and remorse.
Share Fallers

Why Core Lithium, Paladin Energy, Pro Medicus, and Rio Tinto shares are dropping today

These shares are ending the week in the red. But why?

Read more »

Bored man sitting at his desk with his laptop.
Share Fallers

Why Ansell, Elsight, Ramelius, and SGH shares are falling today

These shares are missing out on the market's move higher on Thursday.

Read more »

Frustrated stock trader screaming while looking at mobile phone, symbolising a falling share price.
Share Fallers

Why Bellevue Gold, Harvey Norman, Karoon Energy, and Westpac shares are falling today

These shares are having a tough time on hump day. But why?

Read more »

A worried man holds his head and look at his computer.
Share Fallers

Why Andean Silver, CBA, Life360, and Silex shares are dropping today

These shares are out of form on Tuesday. But why?

Read more »

Person with thumbs down and a red sad face poster covering the face.
Share Fallers

Why 4DMedical, Coronado Global, Metallium, and WiseTech Global shares are falling today

These shares are starting the week in the red. But why?

Read more »

Group of entrepreneurs feeling frustrated during a meeting in the office. Focus is on man with headache.
Share Fallers

5 worst ASX All Ords shares of 2025, and why brokers rate 4 of them a buy

The ASX All Ords rose by 7.11% in 2025 but as always, there were losers in the pack.

Read more »

A man sits in despair at his computer with his hands either side of his head, staring into the screen with a pained and anguished look on his face, in a home office setting.
Share Fallers

Why Capstone Copper, Life360, Northern Star, and Weebit Nano shares are falling today

These shares are having an unhappy start to 2026.

Read more »

a man clasps his hand to his forehead as he looks down at his phone and grimaces with a pained expression on his face as he watches the Pilbara Minerals share price continue to fall
Share Fallers

These were the worst performing ASX 200 shares in 2025

Shareholders of these shares will be hoping for better in 2026.

Read more »