| Period | Completed events | Price coverage | Hit rate | Median excess return | Average excess return | Worst excess return |
|---|---|---|---|---|---|---|
| 5D | 1Small sample | 100.0% (1/1) | 0.0% (0/1) | -1.4% | -1.4% | -1.4% |
| 20D | 1Small sample | 100.0% (1/1) | 0.0% (0/1) | -19.5% | -19.5% | -19.5% |
| 60D | 0No data | Awaiting maturity | — | — | — | — |
| 120D | 0No data | Awaiting maturity | — | — | — | — |
COMPANY RESEARCH
AB SCIENCE
AB.PA · France · Healthcare · Drug Manufacturers—Specialty & Generic
INSIDER SIGNAL
Insider activity score：38.5 / 100
1 insiders · 1 purchase events · €64k net purchases
Europe #1252 · France #110
WHY THIS SIGNAL?
Score anatomy
Each bar shows the contribution to the current score; the weights and formula stay unchanged.
Cluster+10.5 / 35
How many distinct insiders bought in the cluster
Purchase size+17.9 / 25
Purchase value relative to company size and liquidity
Role+20.0 / 20
The seniority and relevance of participating insiders
Recency+0.1 / 10
How recently the purchases occurred
Conviction+9.9 / 10
How clearly buying stands out from other activity
What is holding the score back?
- ⚠ Buyer breadth is moderate · fewer than 4 distinct filers
- ⚠ Purchase activity is becoming less recent
- ✓ Strong insider role · ceo/chair involved
The role contribution uses the inverted role input of the current European model.
Buying concentration
100%
Largest buyer：STEPHANE LEDERMANN · 150k EUR
Gross qualified purchase transaction-line value：150k EUR
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 European screening rules—not a probability of gain, return forecast, or buy recommendation.
Key purchase quotes (filing currency)
| Filer | Price per unit | Trade date |
|---|---|---|
| STEPHANE LEDERMANN | 0.61 EUR | Aug 14, 2026 |
Model details
Cluster breakdown (does not change the score)
- 15-day buyer breadth (count)
- 1 distinct reported filers
- Peak time window
- 2026-08-14 to 2026-08-14
- Current breadth input
- 0.300 (capped at 4+ buyers)
- Buyer independence
- Not yet measured; related-party fields are not cross-market comparable
What the filings show
- 🟢 Recent eligible purchase
STEPHANE LEDERMANN · 150k EUR · Price 0.61 EUR · Aug 14, 2026 - 🔴 1 other transaction line(s) are not counted as discretionary-buying evidence; 0 have zero price
Insider vs stock price
No daily prices and volumes have been captured for this stock yet.
Insider timeline
One insider bought, once (14 Aug).
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.
×A sale
A cross is one insider's sales on one day. People sell to pay tax, to cash in share awards or to hold less of one company, so a sale says less than a purchase does. When someone bought and sold on the same day, the cross sits beside the dot. The totals are under “Purchases against sales” below.
▂Grey bars: companies across Europe 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
Apr
May
Jun
Jul
1Aug
Sep
Oct
Darker bars are inside the 180-day window above.
Who traded
| Insider | Role | Purchases | Sales | Bought | First purchase | Share price since | Earlier purchases |
|---|---|---|---|---|---|---|---|
| Alain Moussy | CEO / chair | — | 1 | — | — | — | fewer than 5 completed |
| STEPHANE LEDERMANN | CEO / chair | 1 | — | 150.0k EUR | 2026-08-14 | — | fewer than 5 completed |
Purchases against sales
Purchases>99%150.0k EUR · 1 line(s) · 1 insider(s)
Sales<1%461 EUR · 1 line(s) · 1 insider(s)
Shares of the reported value of insider transactions in the 180-day window. Sales include disposals for tax, at option exercise or under a pre-set plan, which say little about an insider's view. The split describes what was disclosed; it is not a signal.
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% | 0.300 | 10.5 |
| Qualified-buy size | 25% | 0.717 | 17.9 |
| Role informativeness (inverted) | 20% | 0.000 | 0.0 |
| Recency | 10% | 0.012 | 0.1 |
| Buy/sell conviction | 10% | 0.993 | 9.9 |
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.
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.
Since 2026-10-13, neither column has changed. All bull and bear lists, and what followed each line in the past →
Where the evidence comes from
Independent evidence does not object: the purchases themselves carry bull lines (senior executive buying); short sellers were checked and none crosses a bear threshold. No data is held for: share price and trading, company results.
- The insider purchases themselvesBullsenior executive buying Bearone buyer only5 checked, under the threshold · 2 missing
- Share price and tradingno data held
- Short sellers1 checked, under the threshold
- Company results2 missing
- Company actionsBearsubscription to new shares
Bull case · the buying is informative
- The buyers include the CEO or chair, who sees more of the business than most filers. This site's score gives little or no credit for that: in its backtests purchases by senior executives did no better than other insiders' purchases.Record: after 8,797 earlier disclosures like this, the median 60-session excess return was −3.1%, within 1 percentage point of all comparable disclosures (−3.2%).
Bear case · discount it
- Company actions1 of 1 purchase lines is a subscription to newly issued shares (“Souscription”), bought from the company at an issue price and not in the market. Insiders often take part to support a financing.
- Only one insider bought. A single purchase can reflect that person's own finances rather than a view on the company.Record: after 4,732 earlier disclosures like this, the median 60-session excess return was −2.7%, within 1 percentage point of all comparable disclosures (−3.3%).
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.
- The filings give the size of each trade, not what the buyer already held. Whether a purchase added 1% to a personal stake or doubled it is not known.
Checked and under the threshold: 6
- Either1 insider bought in the last 180 days and 0 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.
- Bear0 of 1 buyer filed as a person closely associated with a manager. Counted for the bear side from half.
- EitherNet purchases of €64k in 180 days. Bull from €1.0M, bear when all purchases total under €25k.
- BearInsiders sold €461 in the same 180 days, 0.72% of the amount bought. Counted for the bear side from 25%.
- EitherThe latest purchase is 64 days old. Bull up to 14 days, bear from 90.
- BearThe register of AMF shows no published net short position in this company. Positions under 0.5% are never published, so this does not show that nobody is short.
Both columns arrange stored facts only. They do not change the insider score or the ranking and are not investment advice.
Signal history
38.5 / 100
Latest recorded score
↓ -0.5 ptssince the first recorded snapshot on 2026-09-23; 25 calendar days observed
- Recorded snapshots
- 21
- First snapshot
- 2026-09-23
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
- 39.0
- 38.7
- 38.6
- 38.5
- 38.5
View all recorded scores
| Snapshot date | Signal score |
|---|---|
| 2026-09-23 | 39.0 |
| 2026-09-24 | 38.9 |
| 2026-09-25 | 38.9 |
| 2026-09-28 | 38.8 |
| 2026-09-29 | 38.8 |
| 2026-09-30 | 38.7 |
| 2026-10-01 | 38.7 |
| 2026-10-02 | 38.7 |
| 2026-10-03 | 38.7 |
| 2026-10-04 | 38.7 |
| 2026-10-05 | 38.6 |
| 2026-10-06 | 38.6 |
| 2026-10-07 | 38.6 |
| 2026-10-08 | 38.6 |
| 2026-10-09 | 38.6 |
| 2026-10-12 | 38.5 |
| 2026-10-13 | 38.5 |
| 2026-10-14 | 38.5 |
| 2026-10-15 | 38.5 |
| 2026-10-16 | 38.5 |
| 2026-10-18 | 38.5 |
Sector context
- Buying breadth
- 6.1% (48 / 792 issuers)
- Sector rank
- #11 / 12
- 7D breadth change
- -0.4 pp · vs 2026-10-12 (6d)
- 30D breadth change
- History building
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 − CAC 40 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.
Market context
No price, valuation or fundamentals have been captured for this stock yet.
Disclosed net short positions
The AMF register, read 18 Oct 2026, publishes no net short position of 0.5% or more in this issuer. Positions below 0.5% are never published, so this is not evidence that nobody is short.
Short-position disclosures are external context; they do not affect the insider score, ranking, or filing eligibility.
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.
Latest news
No news has been captured for this company.
Regulatory filings
The filing records held for this company carry no link to the original notice.
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) · 1 transaction line(s)
Aug 14, 2026Souscription
STEPHANE LEDERMANN · PDG
Action · 245902.0000 shares × 0.6100 EUR · —
Showing 1 of 1 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 1 other transaction(s)
May 20, 2026Cession
Alain Moussy · PDG
Action · 573.0000 shares × 0.8050 EUR · —
Showing 1 of 1 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
- AB.PA
- ISIN
- xparFR001055
- Sector
- Healthcare
- Industry
- Drug Manufacturers—Specialty & Generic
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