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Vol. 01 · Issue 06About · The mastheadThe company, the people, the promises
The masthead

We are building the firm
we wish we'd had at twenty-five.

Tarn is a registered investment advisor for people who would have read the prospectus. The transparency of a hedge fund. The floor of an app. A research desk that signs every thesis, archives every break, and explains every metric inline. Pricing in dollars. Friction where regret lives. No streaks, no badges, no anonymous theses.

2025 founded14 peopleSEC registered0 outside investors
01
Chapter 01 · The story
A founder note.
Marisol Hale
Founder & Lead Research
Twelve years at Greenoak, building the side of the firm that wrote for clients. Left in 2024 to build the firm that wrote for everyone else.

I spent twelve years writing investment memos. The kind that get faxed to qualified clients with eight-figure accounts. The kind with break criteria, scenario tables, signed authors, post-mortems when we got it wrong. Inside the building it was assumed every word was readable and every claim was defensible. Outside the building, retail investors were being sold an entirely different product: opaque allocations, vague theses, gamified surfaces designed to maximize trades rather than returns.

I'd watch friends — smart, careful, professional people in their thirties — show me their brokerage accounts. They could not, in any single case, tell me why they owned what they owned. Not in the sense of "what is the multiple" or "what is the thesis horizon" — in the simpler sense of: what does this company do, why is the position this size, what would tell me to sell. The platforms they used had given them no answer to those questions, and had never asked them.

Tarn is what happens when you take the conventions of an institutional research desk — the writing standard, the two-reviewer rule, the public archive of wins and losses, the named accountability — and ship it to a phone, with a $1 floor and an automated portfolio underneath. The thoughtfulness of a hedge fund. The floor of an app. That's the company. That's the only sentence that matters.

We are taking outside investment from no one. The founders own the firm; that lets us hold pricing stable, refuse PFOF, and resist the every-few-quarters pressure to ship something we wouldn't.

02
Chapter 02 · The principles
Eight things we are committed to. They appear on the recruiting page too.

Substance over flash

01

We will never describe ourselves as "the future of investing." We will describe what we do. In sentences a thoughtful reader can quote.

Authored, never anonymous

02

Every thesis carries a name. Every lesson carries a name. We do not republish broker research as house views.

Pre-declared, never retrofitted

03

Break criteria, valuation justification, time horizons — stated before the trade, not after.

Show the losses

04

Every broken thesis stays in the archive. We do not delete losers. The hit rate is what it is.

Friction over blockers

05

We will slow you down where you would most regret a decision. We will never block you from your money.

Price in dollars

06

Fees in dollars, on every screen. Not in basis points, not in a settings menu, not in a footnote.

Education without gamification

07

No streaks. No badges. No leaderboards. Knowledge is its own reward.

Narrower beats broader

08

We cover roughly a hundred names. We do not cover crypto, options, margin. We will tell you what we do not do, openly.

03
Chapter 03 · The masthead
Fourteen people. Four cities. Four divisions.
Research desk
5 people
Marisol Hale
Founder · Lead Research
New York
Theo Bremmer
Macro & Rates
Boston
Anaya Iyer
Energy & Industrials
Houston
D. Park
Consumer & Healthcare
San Francisco
Asa Lindqvist
International & EM
Stockholm
Engineering
3 people
Hana Volkov
Engineering · Lead
New York
Eli Mendoza
Engineering · Platform
Mexico City
R. Mehta
Engineering · iOS
Bangalore
Operations & Compliance
3 people
Nour Saidi
Compliance · CCO
New York
Tom Park
Operations · COO
New York
Jules Wei
Customer · Lead
Toronto
Advisory board
3 people
Dr. C. Whittaker
Behavioral economics, Stanford GSB
Independent
Hon. R. Allbright
Former FINRA panel member
Independent
B. Reyes
Legal · ex-SEC enforcement
Outside counsel
04
Chapter 04 · What we promise
The plain-English version of Form ADV.

These are the commitments we hold ourselves to. They are visible to every employee on day one. They are reviewable in this page's history. If we ever break one of them, we will publish a memo explaining what changed and why — before the change, where we can; immediately after, where we cannot.

We will
+Show fees in dollars on every screen of the product
+Sign every thesis with an author and a reviewer
+State break criteria upfront, before entering positions
+Archive every broken thesis with its post-mortem
+Walk you through every sell, with full context
+Teach concepts in context, free, no email gate
+Give 90 days advance notice on any pricing change
+Be honest about what we don't know
We won't
Gamify your trading with streaks, badges, or leaderboards
Push price-move notifications by default
Hide our fees in basis points or a settings menu
Write theses anonymously or republish broker research
Charge a performance fee to anyone who isn't a qualified client
Earn payment for order flow
Sell, rent, or share your data with third parties for marketing
Cover crypto, options, margin, or anything we cannot describe in plain English
05
Chapter 05 · Compliance
Where we are registered and what that means for you.

Tarn Advisors LLC intends to operate as a Registered Investment Advisor with the United States Securities and Exchange Commission. As an RIA we would be subject to the fiduciary standard, the recordkeeping requirements of Rule 204-2, and the disclosure requirements of Form ADV. Brokerage services are provided through our clearing partner, currently in selection; assets are held at the clearing partner in accounts titled in your name, with SIPC coverage up to applicable limits.

Performance fees are charged only to clients who meet the SEC's "qualified client" standard under Rule 205-3. Form ADV Part 2A and the relevant Part 2B brochures are available at signup, on this page, and on request — never hidden, never behind an email gate.

We do not currently accept clients in jurisdictions where doing so would require additional registration. We will tell you, before you sign anything, if your state or country requires a regulatory hand-off.

Forms & documents
Form ADV Part 1
Firm-level disclosures
PDF · 24pp
Form ADV Part 2A
The firm brochure
PDF · 38pp
Form ADV Part 2B · M. Hale
Author brochure
PDF · 6pp
Form ADV Part 2B · T. Bremmer
Author brochure
PDF · 6pp
Privacy policy
Gramm-Leach-Bliley
PDF · 8pp
Customer agreement
Master account terms
PDF · 32pp
Best execution policy
Our order routing standards
PDF · 5pp
Proxy voting policy
Currently: pass-through
PDF · 3pp
06
Chapter 06 · Contact
How to reach us. Real humans. Real responses.
Customers
support@tarn.fyi
Open Monday–Friday · 8a–8p ET

For account, deposit, transfer, and access questions. Most answered same business day. Core users have priority routing.

Research
desk@tarn.fyi
Coverage requests · errata

For suggestions on what to cover next, or for corrections to thesis content. The desk reviews these weekly.

Press
press@tarn.fyi
For media inquiries

For media, journalists, and writers. We do not retain a press agency; the founder responds.

Compliance
compliance@tarn.fyi
CCO · Nour Saidi

For regulatory matters, supervisory questions, or complaints. CCO responds within 5 business days.

Careers
careers@tarn.fyi
Hiring research, eng, ops

See the careers page for current openings. We hire slowly. Every candidate meets the founder.

Office
405 Washington St., 7F
New York, NY 10013

Visits by appointment only. Most of the firm is remote-friendly; the office exists for the research desk and customer ops.

Keep reading

Continue the issue.

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03
Pricing
What you pay, in dollars.
Read →
04
Research & Theses
The desk that writes what you read.
Read →
05
Education
Inline. Always. Never gamified.
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