S3 Partners
The full S3 suiteView all →
Data feeds
S
Short Interest
Real-time, float-adjusted
L
Long Interest
45 days ahead of 13F filings
D
Disclosures
Global regulatory filings
M
MAP
Daily cohort-level ownership
Terminal & Desktop
B
Black App
Short side on Bloomberg
BM
BMAP
Long side on Bloomberg
BB
S3 on Bloomberg
Terminal · BQL · Data License
W
Black App Web
Full coverage, no terminal
Workflow platforms
BL
Blacklight
Counterparty finance
BW
Blackwire
Automated security finance workflow
BN
Blackline
Document negotiation
Lo
Locates
Automated short locates
AboutWhy S3
Buy side
Own the position
Portfolio Managers
Long Interest · Crowding · Squeeze risk
Quant Researchers
MAP · Feature store · AI training data
Risk Managers
Concentration · Cohort attribution
Legal & Ops
Blackline · Document negotiation
Corporate IR
Short interest · Ownership monitoring
Sell side
Facilitate flow
Prime Brokerage
Blacklight · Blackwire · Rate Router
Stock Loan
Short Interest · Borrow rates · Locates
Equity Sales & Trading
Short interest · Float · Squeeze signals
Derivatives
Black App · Crowding · Options signals
Research
MAP · Cohort flows · Battleground names
Capital Markets
Short interest · Ownership · Deal flow signals
Investment Banking
Positioning context · M&A · ECM analysis
Basket Trading / Program & QIS
Crowding · Float · Factor exposure
500+ firms · Buy side & sell side
See all audiences →
ResearchBlogs
Request demo →
About
The full S3 suiteView all →
Data feeds
SShort InterestLLong InterestDDisclosuresMMAP
Terminal & Desktop
BBlack AppBMBMAPBBS3 on BloombergWBlack App Web
Workflow platforms
BLBlacklightBWBlackwireBNBlacklineLoLocates
Why S3
Buy side
Own the position
Portfolio ManagersLong Interest · Crowding · Squeeze riskQuant ResearchersMAP · Feature store · AI training dataRisk ManagersConcentration · Cohort attributionLegal & OpsBlackline · Document negotiationCorporate IRShort interest · Ownership monitoring
Sell side
Facilitate flow
Prime BrokerageBlacklight · Blackwire · Rate RouterStock LoanShort Interest · Borrow rates · LocatesEquity Sales & TradingShort interest · Float · Squeeze signalsDerivativesBlack App · Crowding · Options signalsResearchMAP · Cohort flows · Battleground namesCapital MarketsShort interest · Ownership · Deal flow signalsInvestment BankingPositioning context · M&A · ECM analysisBasket Trading / Program & QISCrowding · Float · Factor exposure
See all audiences →
ResearchBlogs
Request demo →
Careers

Build the 7th category of financial data.

S3 Partners is the only firm with the data, infrastructure, and capital markets translation layer to surface actual Long & Short Positioning. We're growing the team that makes it possible.

See open roles →Get in touch
Category-defining work
You'll work on data and infrastructure that institutional finance relies on daily — not a feature, a category.
Small team, real impact
500+ clients, $200T+ in assets under intelligence. You'll see your work matter from day one.
Global reach
Offices in New York, London, and Hong Kong. Remote-friendly roles across every team.
20+ years of data
A proprietary data lake built over two decades. You'll work with data no one else has.
Department
Location
Don't see your role?
Send us a note →
0 OPEN ROLES
Engineering
No open roles right now.
We hire deliberately — when we do, it matters. If you're an engineer who wants to work on data infrastructure that moves institutional markets, we want to hear from you.
Send a note →
Data & Research
No open roles right now.
Our research team publishes work that shapes how institutional finance sees short and long positioning. If that's the work you want to do, introduce yourself.
Send a note →
Sales
No open roles right now.
Bring deep relationships and a fluency in capital markets. We'll bring the data the market doesn't already have.
Send a note →
Product
No open roles right now.
If you think deeply about how financial data should be delivered and used, we'd like to know you.
Send a note →
Operations
No open roles right now.
Strong operators make great data products possible. If that's your background, we'd love to hear from you.
Send a note →
Life at S3

We're building something no one else has built.

S3 Partners has spent 20+ years constructing a proprietary data lake that powers the 7th category of institutional financial data. The team behind it is small, focused, and deeply expert. If you want to work on data that moves markets, this is the place.

Get in touch →
Competitive compensation
Base, bonus, and equity for every full-time role.
Health & wellness
Full medical, dental, and vision coverage from day one.
Flexible work
Hybrid and remote options across all departments.
Learning & development
Budget for courses, conferences, and certifications.
Global exposure
Work with clients and colleagues across 100+ countries.
Market data access
Full access to the S3 data platform and Bloomberg terminal.
S3 Partners
Build the 7th category of financial data. We're hiring.

Data & Analytics

Long InterestMAPShort InterestDisclosures

Workflow

BlacklightBlackwireBlacklineLocates

Company

AboutCareersContactPrivacy Policy

We are Hiring

See Open Roles →
© 2026 S3 PARTNERS, LLC · 590 MADISON AVENUE, 25TH FLOOR, NEW YORK
PRIVACY POLICY
sales@s3partners.com · (212) 715-4300