What it is

A 2–10 page public letter addressed to the target's board, simultaneously filed publicly (as an exhibit to a 13D/A, DFAN14A, or a 6-K) and circulated to holders and media. The letter is the shortest adversarial form — designed to carry one ask and to be fully read in one sitting.

Letters often precede decks by weeks or months. They're the escalation step between private engagement and a public campaign.

When to use it

  • ✅ The ask is narrow and can be named in one sentence
  • ✅ Private engagement has stalled and you need to go public
  • ✅ You want to anchor the campaign narrative before the target controls the frame
  • ✅ A specific decision window is closing (M&A vote, Annual Meeting filing deadline, financing event)
  • ✅ You want to force a response on the record
  • ❌ Don't use the letter form if the argument requires valuation bridges, peer tables, or >3 supporting claims — that's a deck
  • ❌ Avoid for fraud allegations — short reports require evidence depth

Length discipline

  • 2 pages — single-ask letter; governance or capital-return demand
  • 4–6 pages — multi-paragraph argument with chart citations
  • 8–10 pages — unusual; at this length consider a deck instead

Never more than 10. If it's longer, it's a research note pretending to be a letter.

Architecture

1  Salutation            "Dear [Chair]:"
2  The stake             One paragraph establishing standing
3  The concern           Two to four paragraphs — the case
4  The ask               One paragraph — specific demand + deadline
5  The consequence       One paragraph — what happens if ignored
6  Sign-off              Named individuals, fund attribution

Optional: exhibits attached (chart, reference letters, 10-K excerpts).

The stake paragraph

First-person establishment of standing. Standard phrasing:

"[Fund] and its affiliates (collectively, '[Fund]') are [X%] shareholders of [Company], making us one of the [largest / top-N] holders. We have held our position since [date] and have engaged privately with management and the Board since [date]."

This paragraph establishes three things: your size, your tenure, and the fact that you already tried the private route. Never skip it — letters from unknown small holders carry no weight.

The concern: how to structure the middle

The middle 2–4 paragraphs carry the argument. Each paragraph should:

  1. Begin with a specific factual claim — not an opinion
  2. Cite a source — the company's own disclosure, a filing, a peer datapoint
  3. End with the implication — what this fact means for shareholders

Avoid meandering. Each paragraph is a brick; the argument is the wall.

Example paragraph structure:

"The Company's operating margin has declined from X% in 20Y1 to Y% in 20Y5, while its three closest peers ([list]) have expanded margins from [range] to [range]. On the most recent earnings call, management attributed this gap to '[quote]' — a framing that is difficult to reconcile with the fact that [counter-evidence]. The [$X bn of value] implied by closing this gap to the peer median is, in our view, the largest unaddressed opportunity on the Board's agenda."

Fact → source → comparison → implication.

The ask

One paragraph. One specific demand. One deadline.

Weak asks:

  • "We urge the Board to consider all strategic alternatives."
  • "We respectfully request a more thorough review of governance."

Strong asks:

  • "We call on the Board to announce a formal sale process by [date] and engage a nationally recognised investment bank within 30 days."
  • "We demand the Board commit publicly to separating the Midstream segment within 24 months, with an initial step at the next quarterly release."
  • "We urge the Board to replace CEO [Name] by the time of the [date] Annual Meeting or face a contested election."

The strong ask names the verb, the actor, and the deadline. It is mechanical and falsifiable.

The consequence paragraph

Without a consequence, the letter is advisory. State the escalation path:

"If the Board does not commit to [specific step] by [date], we will [launch a formal proxy contest / publish our detailed analysis / nominate directors / requisition a meeting / vote our shares against the Board's slate]."

Be clear, be truthful, and honour what you commit to.

Voice

  • Formal but adversarial. Letters use "we urge", "we demand", "we are compelled to", "we are deeply concerned".
  • Always in the first person plural. "We" establishes the fund, not the individual author.
  • Never hostile to the Board as a body. Hostility is directed at the decision, not the institution. This preserves ISS support.
  • Use the Chair's name. "Dear Mr. [Chair]" personalises; letters addressed to "the Board" read as circulars.
  • No charts inline. Charts go in the exhibit; the letter body is prose. Letters that embed charts read as failed decks.

Distribution

  • Filed simultaneously on EDGAR (13D/A with the letter as an exhibit, or DFAN14A if proxy-relevant)
  • Emailed to top holders within the hour
  • Posted to the campaign domain
  • Shared with 2–3 anchor journalists under embargo (optional)

Anti-patterns

  1. Burying the ask. The ask must appear in the final third of the letter and be recognisable on first read.
  2. Vague consequence. "We reserve all rights" is not a consequence.
  3. Listing more than one primary demand. A letter with three asks dilutes each. Pick the one that matters most.
  4. Publishing without a legal review. Public letters attract defamation claims; review every assertion.
  5. Quoting private conversations. Even if truthful, it signals bad faith and can reach material-nonpublic-information territory.

Common use cases

  • Pre-proxy escalation: letter two months before the Annual Meeting demanding board changes; if ignored, nominees are filed
  • M&A intervention: letter opposing a specific proposed transaction on valuation grounds
  • Capital return push: letter demanding a buyback, dividend, or leverage change
  • Governance-only asks (poison pill removal, classified-board elimination, CEO/Chair separation)

Exemplars

  • Trian · DuPont (pre-campaign 2014 letters) — escalation sequence culminating in the 2015 proxy deck
  • Starboard · Darden — multi-letter pre-proxy sequence
  • Elliott · Southwest (Jun 2024) — letter demanding CEO change and governance refresh
  • Land & Buildings · Welltower (Apr 2026) — letter opposing compensation programme
  • Engine Capital — high-cadence letter writer; many per year

See also

  • forms/activist-deck.md — when the letter isn't enough
  • storytelling/closing-ask.md — the ask paragraph in depth
  • storytelling/audience.md — writing for the Chair vs. fellow holders
  • campaigns/initial-thesis.md — letters as opener