Read the emails that Dick Costolo and Jack Dorsey sent to Twitter staff announcing CEO change
Read Dick Costolo's Goodbye to Twitter and Jack Dorsey's Hello — Shortly after 1 p.m. in San Francisco on Thursday, Dick Costolo told his staff, and the world, that he would be stepping down at Twitter in a surprise announcement.
Context & Ripple Effects
Thursday's surprise announcement — Costolo stepping down with Jack Dorsey taking the interim CEO seat July 1 — landed first as a press release; these emails are the internal version, showing how each man framed the same event to employees hours apart. The companion interview already signaled what the note leaves open: Dorsey declined to deny interest in the job permanently.
The document drop also matters because the aftermath was messy by design: Costolo stayed on a board alongside two former CEOs, a dynamic he addressed directly in his June Q&A on why he stepped down, before the board weighed a broader shuffle including his exit and he committed to leaving the board entirely.
First-order effects
- Twitter staff received the news from both principals in their own words on day one — Costolo saying goodbye, Dorsey saying hello — rather than through a leaked release, softening the optics of an abrupt leadership vacuum effective July 1.
- Costolo remains on the board during the transition even as he hands over the CEO title, keeping him inside the room while the search for a permanent successor begins.
Second-order effects
- Dorsey's non-denial about wanting the job full-time turns the interim appointment into a live audition, forcing the board to either formalize his role or run a search under an acting CEO who wants to stay.
- Having a departing CEO, an interim CEO, and a prior founder-CEO all on or near the board concentrates scrutiny on governance, which the subsequent reporting on a board shuffle including Costolo's exit reflects.
Third-order effects
- If the founder-returns-as-savior pattern holds here, it reinforces a Silicon Valley template where boards revert to iconic founders when growth stalls — and Costolo's own account that going public accelerated short-term thinking at Twitter points at the public-market pressure driving these reversions.
- A transition staged through simultaneous personal emails sets a communications precedent: executive changes are now narrated internally-first, with the memos themselves becoming part of the public record.
The trend: Struggling consumer platforms are increasingly turning back to founder CEOs under public-market pressure, with the transition itself choreographed as a public narrative.