COMPANY RESEARCH
Erbud Spółka Akcyjna
ERB.WA · Poland · Industrials · Engineering & Construction
INSIDER SIGNAL
Insider activity score：51.0 / 100
2 insiders · 2 purchase events · €248k net purchases
Europe #605 · Poland #9
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+20.1 / 25
Purchase value relative to company size and liquidity
Role+19.0 / 20
The seniority and relevance of participating insiders
Recency+9.3 / 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
- ✓ Strong insider role · assoc involved
- ✓ Recent activity · latest purchase 2026-10-16
The role contribution uses the inverted role input of the current European model.
Buying concentration
91%
Largest buyer：DGI Fundacja Rodzinna · 986k PLN
Gross qualified purchase transaction-line value：1.08m PLN
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 |
|---|---|---|
| ALBERT DüRR | 24.76 PLN | Oct 16, 2026 |
| DGI Fundacja Rodzinna | 20.26 PLN | Sep 29, 2026 |
Model details
Cluster breakdown (does not change the score)
- 15-day buyer breadth (count)
- 1 distinct reported filers
- Peak time window
- 2026-09-29 to 2026-09-29
- 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
ALBERT DüRR · 97k PLN · Price 24.76 PLN · Oct 16, 2026 - 🟢 Eligible purchase
DGI Fundacja Rodzinna · 986k PLN · Price 20.26 PLN · Sep 29, 2026 - 🔴 1 other transaction line(s) are not counted as discretionary-buying evidence; 0 have zero price
Insider vs stock price
2 purchase day(s), 2 purchase line(s) in the 180-day window. 1 sale day(s), 1 sale line(s).
Daily close (PLN)Day with an insider purchaseDay with an insider sale
Markers sit on the closing price of the transaction day. They show when insiders traded, not the price they paid or received. "Since" compares that day's close with the last close shown; it is what happened at this company, not a forecast.
If you had followed the purchase
Each row starts on the first close on or after the day a purchase was made public, the earliest a reader could have acted, and ends on the last close shown above.
| Made public | Insiders | In this stock, now | In the median peer stock, now | Difference |
|---|---|---|---|---|
| 2026-09-30 | 1 | 1,096 +9.6% | too few peers | — |
Close to close, before costs, taxes, dividends and currency moves. The peer is the median of the other stocks on the same exchange for which this site holds prices (0 here), not an index. This is what happened, not a forecast: across all purchases on this site the typical gap is close to zero.
Insider timeline
2 insiders bought in the last 180 days, each once and more than 15 days apart. 1 of the buyers also disclosed a sale in the window.
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.
Blue line: this share's price, −14.6% over these six months
The closing price of each day, from 28.75 on 2026-04-21 to 24.55 on 2026-10-16. The line has no scale; read it for high and low: a dot on a low stretch was bought cheaply, a dot on a high stretch was not.
Dashed line: the typical stock on the same exchange, +5.2%
Taken from the 26 other stocks on the same exchange that this site holds prices for. Each is measured from the first day of the window, and every day the middle one is drawn. It starts where the blue line starts, so the gap between the two is the difference: this share −14.6%, the typical one +5.2%, 19.8 points behind. It is not an index and not a comparison within one industry.
▂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
Aug
1Sep
1Oct
Darker bars are inside the 180-day window above.
Who traded
| Insider | Role | Purchases | Sales | Bought | First purchase | Share price since | Earlier purchases |
|---|---|---|---|---|---|---|---|
| ALBERT DüRR | Board member | 1 | — | 97.2k PLN | 2026-10-16 | +0.0% | fewer than 5 completed |
| DGI Fundacja Rodzinna | Associated person | 1 | 1 | 985.6k PLN | 2026-09-29 | +21.8% | fewer than 5 completed |
Purchases against sales
Purchases67%2 line(s) · 2 insider(s)
Sales33%1 line(s) · 1 insider(s)
Shares of the NUMBER of transactions in the 180-day window: a reported value is missing for 1 line(s), or the lines are in more than one currency, so values cannot be added up. 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% | 0.805 | 20.1 |
| Role informativeness (inverted) | 20% | 0.050 | 1.0 |
| Recency | 10% | 0.933 | 9.3 |
| 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.
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: new on the bull side: more buyers than usual here; new on the bear side: value concentrated in one buyer, thinly traded; no longer on the bear side: one buyer only, price down over six months. All bull and bear lists, and what followed each line in the past →
Where the evidence comes from
The two kinds of evidence disagree: the purchases themselves carry bull lines (more buyers than usual here, large purchases, bought in the last two weeks), while company results argue against (loss-making). No data is held for: company actions.
- The insider purchases themselvesBullmore buyers than usual here, large purchases, bought in the last two weeks Bearvalue concentrated in one buyer, associated persons buying2 checked, under the threshold · 3 missing
- Share price and tradingBearthinly traded2 checked, under the threshold
- Short sellers1 checked, under the threshold
- Company resultsBearloss-making1 missing
- Company actionsno data held
Bull case · the buying is informative
- No insider bought in the 180 days before this window; 2 have bought in it. The buying is new for this company, not a habit.Record: after 3,134 earlier disclosures like this, the median 60-session excess return was −2.7%, within 1 percentage point of all comparable disclosures (−2.7%).
- Net purchases of €248k equal 0.41% of the company's market value (€60.9M): large for the size of the business.
- The latest purchase is 1 day old (2026-10-16). The buying is current, not left over from an earlier quarter.
Bear case · discount it
- DGI Fundacja Rodzinna accounts for 91% of the value bought. The other 1 buyer adds names more than money.Record: after 3,396 earlier disclosures like this, the median 60-session excess return was −3.4%, within 1 percentage point of all comparable disclosures (−3.5%).
- 1 of 2 buyers are filed as persons closely associated with a manager (family or a holding vehicle), not the manager. This model weights such filers among the least informative.Record: after 1,554 earlier disclosures like this, the median 60-session excess return was −7.4%, 1.6 percentage points below all comparable disclosures (−5.8%).
- Company resultsThe company is loss-making on the latest captured figures: profit margin −1.3%, return on equity −5.7%.
- Share price and tradingAbout €257k of the stock changes hands on an average day, below this site's €500k screening line. A position is hard to enter or leave at the quoted price.
Evidence still missing
- No buyer here has 5 or more completed earlier purchases on record, so there is no track record to weigh.
- Only one reading of profitability is held (profit margin −1.3%). Whether earnings and cash flow are rising or falling needs the last two reports side by side.
- European notifications have no field saying whether a purchase was pre-arranged; there is no counterpart to the US 10b5-1 box. None of the 2 purchase lines mentions a plan, but a bare “Nabycie” does not rule one out.
- 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: 5, 1 close to it
- BearThe share price changed −15% over six months (three months +4.9%, one month +24%) and stands 31% below its 52-week high. Counted for the bear side from a fall of 20%. close to the threshold
- BullAt most 1 insider bought within any 15 days. Counted for the bull side from 3.
- BearNo insider sale is recorded in the same 180 days.
- BearOver three months the share price changed +4.9% and the median of 462 Industrials companies changed −0.32%: ahead by 5 points. Counted for the bear side from 20 points behind.
- BearThe register of KNF 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
51.0 / 100
Latest recorded score
↑ +0.8 ptssince the first recorded snapshot on 2026-10-01; 17 calendar days observed
- Recorded snapshots
- 15
- First snapshot
- 2026-10-01
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
- 50.2
- 48.1
- 46.8
- 45.3
- 51.0
View all recorded scores
| Snapshot date | Signal score |
|---|---|
| 2026-10-01 | 50.2 |
| 2026-10-02 | 49.6 |
| 2026-10-03 | 49.6 |
| 2026-10-04 | 49.6 |
| 2026-10-05 | 48.1 |
| 2026-10-06 | 47.6 |
| 2026-10-07 | 47.2 |
| 2026-10-08 | 46.8 |
| 2026-10-09 | 46.5 |
| 2026-10-12 | 45.5 |
| 2026-10-13 | 45.3 |
| 2026-10-14 | 45.0 |
| 2026-10-15 | 44.8 |
| 2026-10-16 | 51.6 |
| 2026-10-18 | 51.0 |
Sector context
- Buying breadth
- 7.5% (79 / 1,047 issuers)
- Sector rank
- #8 / 12
- 7D breadth change
- -0.3 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 − WIG20 total-return ETF proxy 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.
| Period | Completed events | Price coverage | Hit rate | Median excess return | Average excess return | Worst excess return |
|---|---|---|---|---|---|---|
| 5D | 1Small sample | 100.0% (1/1) | 100.0% (1/1) | +3.3% | +3.3% | +3.3% |
| 20D | 0No data | Awaiting maturity | — | — | — | — |
| 60D | 0No data | Awaiting maturity | — | — | — | — |
| 120D | 0No data | Awaiting maturity | — | — | — | — |
Market context
PRICE PERFORMANCE
VOLATILITY & LIQUIDITY
- Volatility
- 34.7%
- Beta
- 0.80
- Avg daily volume
- PLN 541,165.4
VALUATION
- Market cap
- PLN 266.0M
- P/E
- —
FUNDAMENTALS
- Profit margin
- -1.3%
- ROE
- -5.7%
- Industry
- Engineering & Construction
Prices to 18 Oct 2026: price cache (Eulerpool). From OpenBB/yfinance, captured 01 Oct 2026: Market cap, Profit margin, ROE, Beta, Industry. It does not affect the insider score or rank.
Disclosed net short positions
The KNF 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
Insiders paid 20.60 PLN a share on average (2 purchase lines, 2 buyers, 2026-09-29 – 2026-10-16). The close on 2026-10-16 was 19.2% above that price.
The latest purchase (2026-10-16) was at 24.76 PLN; the close was 0.8% below that price.
Prices paid are weighted by shares and taken from the filings; dividends are not counted. Not scored.
Buying size vs market trading
4.82% · of estimated traded value in the same period
2026-09-21 – 2026-10-16 · 20 recorded trading sessions
- Disclosed qualifying purchases
- 1,082,832 PLN
- Estimated market traded value
- 22,443,526 PLN
Market-data coverage: 259 verified sessions · Latest session: 2026-10-16 · Ratio status: Available
Recent and largest purchase events / preceding 60-session ADTV
- Oct 16 · ALBERT DüRR · Członek Rady Nadzorczej97,183 PLN · 18.23%533,190 PLN ADTV
- Sep 29 · DGI Fundacja Rodzinna · Osoba blisko związana z osobami pełniącymi obowiązki zarządcze: Dariusz Grzeszczak - Prezes Zarządu985,649 PLN · 449.54%219,258 PLN ADTV
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
News capture status: ok. Articles were retained for audit but none met the reader threshold.
Regulatory filings
- Insider filing announcement · published 2026-10-16 · trade date 2026-10-16
- Insider filing announcement · published 2026-09-30 · trade date 2026-09-29
- Insider filing announcement · published 2026-09-30 · trade date 2026-09-29
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
2 qualifying purchase disclosure(s) · 2 transaction line(s)
Oct 16, 2026Nabycie
ALBERT DüRR · Członek Rady Nadzorczej
Akcje zwykłe na okaziciela · 3925.0 shares × 24.76 PLN · —
Open filingSep 29, 2026Nabycie
DGI Fundacja Rodzinna · Osoba blisko związana z osobami pełniącymi obowiązki zarządcze: Dariusz Grzeszczak - Prezes Zarządu
Akcje na okaziciela · 48650.0 shares × 20.26 PLN · —
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 1 other transaction(s)
Sep 29, 2026Z bycie - sprzedaż / nabycie - kupno
DGI Fundacja Rodzinna · —
Akcje zwykłe na okaziciela · — shares × — · —
Open filingShowing 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
- ERB.WA
- ISIN
- PLERBUD00012
- Sector
- Industrials
- Industry
- Engineering & Construction
Company logos by Parqet