REG - Threadneedle AM Hdgs Prologis, Inc. - Form 8.3 - Prologis, Inc.

What happened

Threadneedle Asset Management Holdings Ltd filed a Form 8.3 public opening position disclosure on 30 October 2026 for Prologis, Inc., with the position dated 29 October 2026. The filing states Threadneedle is also disclosing in respect of Segro Plc, another party to the offer.

Confirmed

Global impact / market context

A Form 8.3 filing is a public disclosure by an investor holding 1% or more of a relevant security in a takeover situation, which means the market gains visibility into who holds shares in Prologis and how that investor is positioned.

Analyst inference

The disclosure links Threadneedle and its ultimate parent Ameriprise to a Prologis-related offer that also involves Segro Plc, which means investors are watching how large holders like Threadneedle position themselves as the offer develops.

Analyst inference

What to watch

1. Threadneedle's Form 8.3 names Prologis, Inc. as the offeree and states the discloser is also making disclosures in respect of Segro Plc, another party to the offer. Confirmed
2. Watch for further Form 8.3 filings from Threadneedle or Ameriprise affiliates that update the disclosed position in Prologis as the offer situation develops. Proposed
3. Track how the disclosed holdings compare with the 1% threshold that triggers Form 8.3, since changes above or below that level would require new public disclosures. Analyst inference

Evidence

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