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:
- Begin with a specific factual claim — not an opinion
- Cite a source — the company's own disclosure, a filing, a peer datapoint
- 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
- Burying the ask. The ask must appear in the final third of the letter and be recognisable on first read.
- Vague consequence. "We reserve all rights" is not a consequence.
- Listing more than one primary demand. A letter with three asks dilutes each. Pick the one that matters most.
- Publishing without a legal review. Public letters attract defamation claims; review every assertion.
- 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 enoughstorytelling/closing-ask.md— the ask paragraph in depthstorytelling/audience.md— writing for the Chair vs. fellow holderscampaigns/initial-thesis.md— letters as opener