Loop in means add someone to ongoing communication or a decision process. It is a separable phrasal verb. With a pronoun object, place the pronoun between loop and in.
A common pattern is loop [someone] in on [a project/topic]. An alternative is keep [someone] looped in. Say loop her in, not loop in her. With a full noun, both loop the manager in and loop in the manager are grammatical.
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Learn "Loop In" in depth →Core pattern: object plus "in on"
With a name or full noun phrase, object placement can vary. On can introduce the topic.
"I will make sure to loop the finance director in on the latest budget adjustments before the board meeting."
"Please loop Sarah in on the progress report so she can provide feedback."
In this construction, in completes the phrasal verb. On introduces the subject. You can omit on when context identifies the topic another way.
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Pronoun rule: it has to split
With a pronoun object, separation is required in standard usage.
"Our client just requested a change in scope for the upcoming project. I need to get the account manager updated on the details; please loop him in before I send the reply."
Loop him in is correct; loop in him is not. In keep someone looped in, looped in describes continued inclusion or awareness.
What doesn't collocate
Do not replace in with into. Instead of loop into the manager, say loop in the manager or loop the manager in. With a pronoun, use loop them in, not loop in them. Regarding can introduce the subject, though on is often more concise.
Practice scenarios
Practice using loop in in situations like:
- adding a stakeholder to an email thread so they can follow a project's progress
- asking a colleague to include someone on a decision before you send a reply
- correcting yourself mid-sentence when a pronoun object slips to the wrong side of "in"
Useful practice phrases:
- "Could you loop Maria in on this thread so she can follow along?"
- "Please loop him in before we send the reply -- not 'loop in him.'"
- "I'll loop in the legal team on the contract changes."
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Start the "Loop In" learning path →Object placement is strict when the object is a pronoun.
Use loop them in. With a name or full noun phrase, either placement may fit.