COMPANY RESEARCH
Cosan S.A.
CSAN3 · United States · Consumer Cyclical
INSIDER SIGNAL
Insider activity score：54.0 / 100
1 insiders · 1 purchase events · $12.55m net purchases
US #484 · United States #484
WHY THIS SIGNAL?
Score anatomy
Each bar shows the contribution to the current score; the weights and formula stay unchanged.
Cluster+7.0 / 35
How many distinct insiders bought in the cluster
Purchase size+23.2 / 25
Purchase value relative to company size and liquidity
Role+7.0 / 20
The seniority and relevance of participating insiders
Recency+0.8 / 10
How recently the purchases occurred
Conviction+10.0 / 10
How clearly buying stands out from other activity
What is holding the score back?
- ⚠ Buyer breadth is moderate · fewer than 4 distinct filers
- ⚠ Insider role contributes less on the current role scale
- ⚠ Purchase activity is becoming less recent
The role contribution follows the US model's seniority ladder.
Buying concentration
100%
Largest buyer：Martins Marcelo Eduardo · 12.55m USD
Gross qualified purchase transaction-line value：12.55m USD
The headline $ total is net buying for the screen; this module uses gross qualified purchase transaction-line values in the filing currency, so the amounts can differ. The current 15-day buyer-breadth input counts distinct buyers; value concentration is disclosed separately here.
This is a ranking under the current US screening rules—not a probability of gain, return forecast, or buy recommendation.
Key purchase quotes (filing currency)
| Filer | Price per unit | Trade date |
|---|---|---|
| Martins Marcelo Eduardo | 5.14 USD | May 19, 2026 |
Model details
Cluster breakdown (does not change the score)
- 15-day buyer breadth (count)
- 1 distinct reported filers
- Peak time window
- 2026-05-19 to 2026-05-19
- Current breadth input
- 0.200 (capped at 4+ buyers)
- Buyer independence
- Not yet measured; related-party fields are not cross-market comparable
What the filings show
- 🟢 Recent eligible purchase
Martins Marcelo Eduardo · 12.55m USD · Price 5.14 USD · May 19, 2026 - 🔴 1 other transaction line(s) are not counted as discretionary-buying evidence; 0 have zero price
Insider timeline
One insider bought, once (19 May).
Tap an item for what it means.
●A purchase: the bigger the dot, the more was bought
Each dot is one insider's purchases on one day. The dot's area follows the amount: the largest purchase here gets the largest dot. Hold the pointer over a dot to see the date and the amount.
▂Grey bars: companies across United States disclosing purchases each week
A taller bar is a week in which more companies disclosed insider purchases.
This company: insiders buying per month, last 12 months
Nov
Dec
Jan
Feb
Mar
1Apr
1May
Jun
Jul
Aug
Sep
Oct
Darker bars are inside the 180-day window above.
Who traded
| Insider | Role | Purchases | Sales | Bought | First purchase | Share price since |
|---|---|---|---|---|---|---|
| Martins Marcelo Eduardo | CEO / chair | 1 | — | 12.5M USD | 2026-05-19 | — |
BULL VS BEAR
Two readings of this buying
The same filings, read two ways. Each line is a fact stored for this company with the number behind it, and appears only when that number crosses a fixed threshold. Neither side is a forecast and no winner is declared.
Where the evidence comes from
Nothing independent to compare with: the purchases themselves carry bull lines (large purchases, purchase added much to the holding), but no other source has data here, so they are neither confirmed nor contradicted.
- The insider purchases themselvesBulllarge purchases, purchase added much to the holding Bearone buyer only, latest purchase is old4 checked, under the threshold · 1 missing
- Share price and tradingno data held
- Short sellersno data held
- Company results2 missing
- Company actionsno data held
Bull case · the buying is informative
- Insiders committed a net $12.5M of their own money in 180 days.
- 1 of 1 purchase filing states the shares held before and after. The largest addition to an existing holding took it from 849,672 to 4,890,286 shares (+476%). A holding here is one way of owning the shares: directly, or through one named trust or entity.
Bear case · discount it
- Only one insider bought. A single purchase can reflect that person's own finances rather than a view on the company.
- The latest purchase was 152 days ago (2026-05-19). A reporting period has passed since, so what the buyers knew then may already be public.
Evidence still missing
- No buyer here has 5 or more completed earlier purchases on record, so there is no track record to weigh.
- The company's market value is not captured, so the purchases cannot be stated as a share of the business or of its trading volume.
- No earnings, margin or cash-flow figures are captured for this company. The latest annual and interim reports are where to check whether the business is improving or deteriorating.
Checked and under the threshold: 4
- Either1 insider bought in the last 180 days and 1 in the 180 days before. Bull when the number at least doubles and rises by two; bear when at least two bought before and no more buy now.
- BearNo insider sale is recorded in the same 180 days.
- BearNone of the 1 purchase filing ticks Form 4's 10b5-1 box.
- BearNo insider filing in the last 180 days opened a hedge on this stock.
Both columns arrange stored facts only. They do not change the insider score or the ranking and are not investment advice.
Why this score? · Model details
Priority = 100 × Σ(fixed weight × 0–1 rule-based input)
| Factor | Weight | This company input | Point contribution |
|---|---|---|---|
| 15-day buyer breadth (count) | 35% | 0.200 | 7.0 |
| Qualified-buy size | 25% | 0.929 | 23.2 |
| Role informativeness (inverted) | 20% | 0.650 | 13.0 |
| Recency | 10% | 0.079 | 0.8 |
| Buy/sell conviction | 10% | 1.000 | 10.0 |
This is a heuristic ordering under the current rules, not a calibrated return forecast. It explains why candidates rank differently; the public-filing evidence and data limits are shown below.
Signal history
54.0 / 100
Latest recorded score
↓ -7.1 ptssince the first recorded snapshot on 2026-10-09; 9 calendar days observed
- Recorded snapshots
- 7
- First snapshot
- 2026-10-09
There is not yet a 30-calendar-day comparison; earlier scores are not reconstructed. These are raw signal scores saved when each full scoring run completed. They describe changes in research ranking, not price performance or returns.
Why did it change?
Less than 30 days of comparable history is available, so factor movement is not yet decomposed.
Signal score history
Fixed 0–100 scale; dates are spaced by calendar time.
Recent recorded points
- 61.1
- 54.1
- 54.1
- 54.1
- 54.0
View all recorded scores
| Snapshot date | Signal score |
|---|---|
| 2026-10-09 | 61.1 |
| 2026-10-12 | 54.2 |
| 2026-10-13 | 54.1 |
| 2026-10-14 | 54.1 |
| 2026-10-15 | 54.1 |
| 2026-10-16 | 54.1 |
| 2026-10-18 | 54.0 |
Sector context
- Buying breadth
- 5.2% (25 / 484 issuers)
- Sector rank
- #6 / 13
This is sector-level research context. It does not affect the Insider Signal or ranking.
Insider profile outcomes
Historical performance following insider filings. The company role is translated below each name while preserving the original title.
- Excess return = stock return − S&P 500 ETF (SPY adjusted close) return over the same period.
- Hit rate = completed events with positive excess return ÷ total completed events.
- Price coverage = valid point-in-time prices ÷ events mature enough for that period.
- Returns start on the first shared trading session on or after publication.
- Small-sample rule: n<5 is shown for transparency and is not scored.
Events are disclosure-level observations; related disclosures published on the same date may share a return path and may not be statistically independent. This research enrichment does not affect the insider score or ranking.
Signal outcomes
Calculated from immutable US ranking snapshots; excess return is stock return minus SPY return. Newly saved snapshots remain pending until each forward horizon matures. This never affects the US score.
| Horizon | Status | Result |
|---|---|---|
| 5D | Awaiting maturity | — |
| 20D | Awaiting maturity | — |
| 60D | Awaiting maturity | — |
| 120D | Awaiting maturity | — |
Market context
PRICE PERFORMANCE
VOLATILITY & LIQUIDITY
- Volatility
- —
- Beta
- —
- Avg daily volume
- —
VALUATION
- Market cap
- —
- P/E
- —
FUNDAMENTALS
- Profit margin
- —
- ROE
- —
- Industry
- —
Prices to 11 Oct 2026: OpenBB/yfinance. It does not affect the insider score or rank.
Insiders' buying price vs the latest close
No daily prices have been captured for this stock yet.
Buying size vs market trading
Complete price and volume history is not yet available.
Market-data coverage: 0 verified sessions · Latest session: — · Ratio status: Unavailable
Traded value is estimated as close × shares traded, in major currency units. Includes disclosed qualifying purchases; disclosures may lag. Contractual or planned acquisitions are not necessarily discretionary. Ratios describe relative trading size, not market participation or score contributions.
Regulatory filings
- Insider filing announcement · published 2026-05-21 · trade date 2026-05-19
Results and insider purchases
No results announcement (8-K Item 2.02) from this company was found in its SEC filings.
Ownership and trading-plan context
| Direct / indirect ownership | Unavailable |
|---|---|
| 10b5-1 filing evidence | Unavailable |
| Evidence retrieved | Unavailable |
These are accession-level filing fields. Unavailable means the evidence was not fetched or parsed; it is never inferred as “No” and does not adjust the US score.
Filing evidence
These are underlying national-feed records from the 365-day window ending on the saved ranking snapshot. The score uses only the latest 180 days; older qualifying equity purchases remain visible for audit but do not enter the current score. The original filer, role, transaction classification, instrument, price, volume, value and source fields are retained. The first three rows are shown; remaining records can be unfolded for audit. Other transaction types are retained but excluded from the score.
Excluded transactions & classification
1 qualifying purchase disclosure(s) · 2 transaction line(s)
May 19, 2026Open market purchase
Martins Marcelo Eduardo · Chief Executive Officer
COMMON STOCK (BVMF: CSAN3) · 2441528.0 shares × 5.14 USD · 12549453.92 USD
Open filingApr 10, 2026Open market purchase
Martins Marcelo Eduardo · Chief Executive Officer
COMMON STOCK (BVMF: CSAN3) · 1599086.0 shares × 7.05 USD · 11273556.299999999 USD
Open filingShowing 2 of 2 matching raw-feed row(s) from the current 365-day research window. Prices and reported values remain in the filing currency and its major unit (for example, UK pence are parsed as GBP). The screen-level $ aggregate is separately FX-normalised for research ranking, not a trade-date conversion.
Other disclosed transactions · excluded from score
View 2 other transaction(s)
May 19, 2026Other acquisition or disposition
Martins Marcelo Eduardo · Chief Executive Officer
LONG TERM INCENTIVE (BVMF: CSAN3) · 2441528.0 shares × 5.14 USD · 12549453.92 USD
Open filingApr 10, 2026Other acquisition or disposition
Martins Marcelo Eduardo · Chief Executive Officer
LONG TERM INCENTIVE (BVMF: CSAN3) · 1552511.0 shares × 7.05 USD · 10945202.549999999 USD
Open filingShowing 2 of 2 matching raw-feed row(s) from the current 365-day research window. Prices and reported values remain in the filing currency and its major unit (for example, UK pence are parsed as GBP). The screen-level $ aggregate is separately FX-normalised for research ranking, not a trade-date conversion.
Snapshot & identity
- Snapshot date
- 2026-10-18
- Ticker
- CSAN3
- ISIN
- —
- Sector
- Consumer Cyclical
- Industry
- —
Company logos by Parqet
How to read Form 4 transaction codes
| Code | Interpretation | Screen treatment |
|---|---|---|
| P | Open-market / private purchase | Buy evidence when the security is qualifying equity |
| S | Sale | Sell evidence when the security is qualifying equity |
| A | Grant / award | Context only |
| F | Tax-related withholding | Context only |
| M | Option exercise | Context only |
| G | Gift | Context only |
| J / L | Other / non-directional | Context only |
P/S rows for options, warrants, compensation units and debt remain visible for audit but are excluded from equity scores and quotes.