STL wins European patent dispute vs Fujikura, EPO revokes rival patent

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STLTECH · price

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▲ positive · ▼ negative · ● neutral filings · teal = economic event · numbered = multiple that day (click to pick). Times IST.

Price reactionminutes from the announcement price · days from the prior close

-4.6%Reaction day

₹541.00

prior close

₹531.00

announcement price

After-mkt

timing

Nifty Microcap 250market+0.1%-4.8% vs market

On the reaction day the stock moved 4.8 pts less than Nifty Microcap 250, over the same two closes: a difference in percentage points, not a measure of what the filing did.

Minutes after the announcementfrom the announcement price · no benchmark

Stock

-0.2

10m

+0.8

15m

+2.3

30m

+0.2

Sessions after the filingfrom the prior close

StockMarketvs market

Reaction day

-4.6+0.1-4.8

Next day

-1.6-0.9-0.8

-0.2-0.2+0.1

+0.2-0.7+0.9

-4.6-1.8-2.9

-7.6-1.2-6.4

+0.6-2.0+2.6

15d

+8.1+0.0+8.1

+23.4+2.5+20.9

+57.6+1.1+56.5

+78.1+1.2+76.9

UpDownMarket · Nifty Microcap 250Pending

Minute windows have no benchmark: there is no intraday index history to compare against.

AI summary

Sterlite Technologies (STLTECH) won a definitive victory in its European patent dispute with Fujikura Ltd. The European Patent Office Technical Board of Appeal ruled on June 24, 2026, revoking Fujikura's European Patent EP 3796060 in its entirety. The ruling is final, binding and non-appealable, and also resolves the UK patent dispute between the parties in STL's favour. STL holds a global portfolio of 785 patents.

Likely market impact

Positive for STL - strengthens its optical connectivity position in the UK and Europe and removes a key legal threat from competitor Fujikura.