REG - Janus Henderson Inv. Prologis, Inc. - Form 8.3 - Prologis, Inc.

What happened

Janus Henderson Group Ltd filed a Form 8.3 disclosure on 26 October 2026 as a person with interests in relevant securities representing 1% or more. The disclosure relates to Prologis, Inc., names Jupiter Topco LLC as owner or controller, and covers a position held on 23 October 2026.

Confirmed

Global impact / market context

A Form 8.3 shows a large investor holds at least 1% of a company involved in a takeover situation, which means its buying or selling can matter. Janus Henderson also said it is making disclosures for SEGRO plc, suggesting it has interests tied to more than one party.

Analyst inference

This is an opening position disclosure under the Takeover Code, the rules governing UK takeover offers. It tells investors that Janus Henderson held Prologis securities on 23 October 2026, but the supplied text does not show the size, direction, or price of that holding.

Analyst inference

What to watch

1. Check the position tables in the full Form 8.3 for the number of Prologis securities held and whether the interest is long, short, or a right to subscribe. Confirmed
2. Watch for later Rule 8.3 dealing disclosures from Janus Henderson, which would show whether it bought or sold Prologis securities after 23 October 2026. Proposed
3. Because Janus Henderson also discloses in respect of SEGRO plc, compare its Prologis and SEGRO positions to see which takeover party its interests lean toward. Analyst inference

Evidence

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