| Period | Completed events | Price coverage | Hit rate | Median excess return | Average excess return | Worst excess return |
|---|---|---|---|---|---|---|
| 5D | 23Established evidence | 100.0% (23/23) | 60.9% (14/23) | +2.2% | +2.8% | -10.3% |
| 20D | 21Established evidence | 100.0% (21/21) | 47.6% (10/21) | -2.2% | -1.3% | -16.9% |
| 60D | 18Developing evidence | 100.0% (18/18) | 38.9% (7/18) | -13.3% | -5.6% | -31.6% |
| 120D | 15Developing evidence | 100.0% (15/15) | 66.7% (10/15) | +19.8% | +14.4% | -31.9% |
COMPANY RESEARCH
Rubean AG
R1B.F · Germany · Technology · Software—Infrastructure
INSIDER SIGNAL
Insider activity score：51.0 / 100
1 insiders · 7 purchase events · €288k net purchases
Europe #605 · Germany #74
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+20.4 / 25
Purchase value relative to company size and liquidity
Role+13.0 / 20
The seniority and relevance of participating insiders
Recency+3.1 / 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 uses the inverted role input of the current European model.
Buying concentration
100%
Largest buyer：Stefan Mittnik · 288k EUR
Gross qualified purchase transaction-line value：288k 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 |
|---|---|---|
| Stefan Mittnik | 4.74–4.8 EUR | Sep 30, 2026 |
| Stefan Mittnik | 4.4979 EUR | Sep 9, 2026 |
| Stefan Mittnik | 4.64 EUR | Jul 3, 2026 |
Model details
Cluster breakdown (does not change the score)
- 15-day buyer breadth (count)
- 1 distinct reported filers
- Peak time window
- 2026-05-21 to 2026-05-21
- 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
Stefan Mittnik · 19k EUR · Price 4.74–4.8 EUR · Sep 30, 2026 - 🟢 Eligible purchase
Stefan Mittnik · 227k EUR · Price 4.4979 EUR · Sep 9, 2026 - 🟢 Large eligible purchase
Stefan Mittnik · 9k EUR · Price 4.64 EUR · Jul 3, 2026 - 🟡 4 remaining qualified transaction line(s) across 4 disclosure(s)
Insider vs stock price
7 purchase day(s), 8 purchase line(s) in the 180-day window.
Daily close (EUR)Day with an insider purchase
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 |
|---|---|---|---|---|
| 2026-05-22 | 1 | 1,061 +6.1% | 975 −2.5% | +86 +8.6 pts |
| 2026-07-06 | 1 | 1,226 +22.6% | 883 −11.7% | +344 +34.4 pts |
| 2026-07-15 | 1 | 1,156 +15.6% | 896 −10.4% | +260 +26.0 pts |
| 2026-08-06 | 1 | 1,150 +15.0% | 932 −6.8% | +218 +21.8 pts |
| 2026-09-10 | 1 | 1,156 +15.6% | 961 −3.9% | +195 +19.5 pts |
| 2026-10-02 | 1 | 1,088 +8.8% | 993 −0.7% | +95 +9.5 pts |
| 2026-10-05 | 1 | 1,083 +8.3% | 992 −0.8% | +92 +9.2 pts |
7 of 7 disclosure day(s) ended ahead of the median peer stock.
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 (36 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
One insider bought, 7 times, the latest (30 Sep). The share closed at 4.66 that day and at 5.20 most recently (+11.6%).
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. None of this company's filings in the window states an amount, so every dot is the same size.
Blue line: this share's price, +18.7% over these six months
The closing price of each day, from 4.38 on 2026-04-21 to 5.20 on 2026-10-09. 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, −7.2%
Taken from the 37 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 +18.7%, the typical one −7.2%, 26.0 points ahead. 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
1Dec
1Jan
1Feb
Mar
Apr
1May
Jun
1Jul
1Aug
1Sep
Oct
Darker bars are inside the 180-day window above.
Who traded
| Insider | Role | Purchases | Sales | Bought | First purchase | Share price since | Earlier purchases |
|---|---|---|---|---|---|---|---|
| Stefan Mittnik | Supervisory board | 7 | — | — | 2026-05-21 | +9.2% | 18 completed, median −13.3% against peers after 60 sessions |
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% | 0.815 | 20.4 |
| Role informativeness (inverted) | 20% | 0.350 | 7.0 |
| Recency | 10% | 0.308 | 3.1 |
| 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: no longer on the bull side: bought in the last two weeks; new on the bear side: loss-making; no longer on the bear side: thinly traded. 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 (large purchases), while company results argue against (loss-making). No data is held for: company actions.
- The insider purchases themselvesBulllarge purchases Bearone buyer only, usual level for this company, buyer's past purchases trailed the benchmark2 checked, under the threshold · 2 missing
- Share price and trading2 checked, under the threshold
- Short sellers1 checked, under the threshold
- Company resultsBearloss-making1 missing
- Company actionsno data held
Bull case · the buying is informative
- Net purchases of €288k equal 1.2% of the company's market value (€23.5M): large for the size of the business.
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.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%).
- Buying at this level is normal here: 2 insiders bought in the previous 180 days and 1 in this one.Record: after 2,869 earlier disclosures like this, the median 60-session excess return was −2.6%, within 1 percentage point of all comparable disclosures (−2.7%).
- Company resultsThe company is loss-making on the latest captured figures: profit margin −55%, return on equity −18%.
- The 18 earlier purchases by Stefan Mittnik trailed DAX by a median 13% over the following 60 trading days.
Evidence still missing
- Only one reading of profitability is held (profit margin −55%). 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 8 purchase lines mentions a plan, but a bare “Kauf” 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
- EitherThe latest purchase is 17 days old. Bull up to 14 days, bear from 90. close to the threshold
- BearNo insider sale is recorded in the same 180 days.
- BearThe share price changed +16% over six months (three months +16%, one month +16%) and stands 27% below its 52-week high. Counted for the bear side from a fall of 20%.
- BearOver three months the share price changed +16% and the median of 330 Technology companies changed −2.4%: ahead by 18 points. Counted for the bear side from 20 points behind.
- BearThe register of Bundesanzeiger 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
↓ -3.8 ptsversus the comparable snapshot on 2026-09-14 (34 calendar days apart)
- Recorded snapshots
- 35
- First snapshot
- 2026-08-26
Only scores captured when the scoring run completed are compared. 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?
Decomposition across the five score factors between comparable snapshots; historical scores are not recalculated.
- Purchase size+0.1 pts
- Recency-4.0 pts
Signal score history
Fixed 0–100 scale; dates are spaced by calendar time.
Recent recorded points
- 52.0
- 45.8
- 50.4
- 54.0
- 51.0
View all recorded scores
| Snapshot date | Signal score |
|---|---|
| 2026-08-26 | 52.0 |
| 2026-08-27 | 52.0 |
| 2026-08-28 | 46.9 |
| 2026-08-31 | 46.5 |
| 2026-09-01 | 46.4 |
| 2026-09-02 | 46.3 |
| 2026-09-03 | 46.2 |
| 2026-09-04 | 46.1 |
| 2026-09-07 | 45.8 |
| 2026-09-08 | 45.8 |
| 2026-09-09 | 45.7 |
| 2026-09-10 | 57.1 |
| 2026-09-11 | 56.5 |
| 2026-09-14 | 54.8 |
| 2026-09-23 | 51.6 |
| 2026-09-24 | 51.3 |
| 2026-09-25 | 51.1 |
| 2026-09-28 | 50.4 |
| 2026-09-29 | 50.3 |
| 2026-09-30 | 50.1 |
| 2026-10-01 | 49.9 |
| 2026-10-02 | 56.6 |
| 2026-10-03 | 56.6 |
| 2026-10-04 | 56.6 |
| 2026-10-05 | 54.9 |
| 2026-10-06 | 54.5 |
| 2026-10-07 | 54.0 |
| 2026-10-08 | 53.6 |
| 2026-10-09 | 53.2 |
| 2026-10-12 | 52.2 |
| 2026-10-13 | 51.9 |
| 2026-10-14 | 51.7 |
| 2026-10-15 | 51.4 |
| 2026-10-16 | 51.2 |
| 2026-10-18 | 51.0 |
Sector context
- Buying breadth
- 6.0% (44 / 734 issuers)
- Sector rank
- #12 / 12
- 7D breadth change
- -1.2 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 − DAX 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 | 3Small sample | 100.0% (3/3) | 33.3% (1/3) | -1.4% | +16.9% | -3.2% |
| 20D | 3Small sample | 100.0% (3/3) | 100.0% (3/3) | +11.4% | +9.0% | +0.3% |
| 60D | 3Small sample | 100.0% (3/3) | 66.7% (2/3) | +5.3% | +5.5% | -2.8% |
| 120D | 3Small sample | 100.0% (3/3) | 66.7% (2/3) | +1.4% | +0.9% | -1.5% |
| Period | Completed events | Price coverage | Hit rate | Median excess return | Average excess return | Worst excess return |
|---|---|---|---|---|---|---|
| 5D | 3Small sample | 100.0% (3/3) | 33.3% (1/3) | -18.1% | -10.0% | -21.2% |
| 20D | 3Small sample | 100.0% (3/3) | 100.0% (3/3) | +28.7% | +33.3% | +20.0% |
| 60D | 3Small sample | 100.0% (3/3) | 66.7% (2/3) | +52.9% | +36.9% | -3.9% |
| 120D | 3Small sample | 100.0% (3/3) | 66.7% (2/3) | +8.1% | -2.9% | -31.3% |
Market context
PRICE PERFORMANCE
VOLATILITY & LIQUIDITY
- Volatility
- 79.4%
- Beta
- -0.14
- Avg daily volume
- €582.4
VALUATION
- Market cap
- €23.5M
- P/E
- —
FUNDAMENTALS
- Profit margin
- -54.7%
- ROE
- -18.4%
- Industry
- Software - Infrastructure
Prices to 11 Oct 2026: OpenBB/yfinance; volume from price cache (yfinance). From OpenBB/yfinance, captured 18 Oct 2026: Market cap, Profit margin, ROE, Beta, Industry. It does not affect the insider score or rank.
Disclosed net short positions
The Bundesanzeiger 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
The latest close in the price history is more than a week old.
Buying size vs market trading
Market history is too old for this snapshot; ratios are withheld.
Market-data coverage: 507 verified sessions · Latest session: 2026-10-09 · 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
- Insider filing announcement · published 2026-10-05 · trade date 2026-09-30
- Insider filing announcement · published 2026-10-02 · trade date 2026-09-30
- Insider filing announcement · published 2026-09-10 · trade date 2026-09-09
Unfold all 13 filings
- Insider filing announcement · published 2026-10-05 · trade date 2026-09-30
- Insider filing announcement · published 2026-10-02 · trade date 2026-09-30
- Insider filing announcement · published 2026-09-10 · trade date 2026-09-09
- Insider filing announcement · published 2026-08-06 · trade date 2026-08-06
- Insider filing announcement · published 2026-08-06 · trade date 2026-08-05
- Insider filing announcement · published 2026-07-15 · trade date 2026-07-13
- Insider filing announcement · published 2026-07-06 · trade date 2026-07-03
- Insider filing announcement · published 2026-05-22 · trade date 2026-05-21
- Insider filing announcement · published 2026-02-20 · trade date 2026-02-19
- Insider filing announcement · published 2026-01-06 · trade date 2026-01-06
- Insider filing announcement · published 2025-12-31 · trade date 2025-12-30
- Insider filing announcement · published 2025-12-24 · trade date 2025-12-23
- Insider filing announcement · published 2025-12-16 · trade date 2025-12-15
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
13 qualifying purchase disclosure(s) · 13 transaction line(s)
Sep 30, 2026Kauf
Stefan Mittnik · Aufsichtsrat b) Erstmeldung
Aktie · 3000 shares × 4,80 EUR · 14.400,00 EUR
Open filingSep 30, 2026Kauf
Stefan Mittnik · Aufsichtsrat b) Erstmeldung
Aktie · 1042 shares × 4,74 EUR · 4.939,08 EUR
Open filingSep 9, 2026Kauf
Stefan Mittnik · Aufsichtsrat b) Erstmeldung
Aktie · 50461 shares × 4,4979 EUR · 226.968,5319 EUR
Open filingUnfold all 10 remaining filing row(s)
| Transaction date | Published | Filer | Role | Transaction | Instrument | Price (local currency) | Quote currency | Volume | Reported value (local currency) | Source |
|---|---|---|---|---|---|---|---|---|---|---|
| 2026-08-06 | 2026-08-06 | Stefan Mittnik | Aufsichtsrat b) Erstmeldung | Kauf | Aktie | 4,58 EUR | EUR | 2000 | 9.160,00 EUR | Open filing |
| 2026-08-05 | 2026-08-06 | Stefan Mittnik | Aufsichtsrat b) Erstmeldung | Kauf | Aktie | 4,60 EUR | EUR | 2000 | 9.200,00 EUR | Open filing |
| 2026-07-13 | 2026-07-15 | Stefan Mittnik | Aufsichtsrat b) Erstmeldung | Kauf | Aktie | 4,56 EUR | EUR | 2000 | 9.120,00 EUR | Open filing |
| 2026-07-03 | 2026-07-06 | Stefan Mittnik | Aufsichtsrat b) Erstmeldung | Kauf | Aktie | 4,64 EUR | EUR | 2000 | 9.280,00 EUR | Open filing |
| 2026-05-21 | 2026-05-22 | Stefan Mittnik | Aufsichtsrat b) Erstmeldung | Kauf | Aktie | 4,96 EUR | EUR | 1008.0645 | 5.000,00 EUR | Open filing |
| 2026-02-19 | 2026-02-20 | Stefan Mittnik | Aufsichtsrat b) Erstmeldung | Kauf | Aktie | 4,70 EUR | EUR | 1000 | 4.700,00 EUR | Open filing |
| 2026-01-06 | 2026-01-06 | Stefan Mittnik | Aufsichtsrat b) Erstmeldung | Kauf | Aktie | 4,68 EUR | EUR | 1000 | 4.680,00 EUR | Open filing |
| 2025-12-30 | 2025-12-31 | Bernd Martin Krohn | Aufsichtsrat b) Erstmeldung | Kauf | Aktie | 4,50 EUR | EUR | 300 | 1.350,00 EUR | Open filing |
| 2025-12-23 | 2025-12-24 | Bernd Martin Krohn | Aufsichtsrat b) Erstmeldung | Kauf | Aktie | 4,68 EUR | EUR | 714 | 3.341,52 EUR | Open filing |
| 2025-12-15 | 2025-12-16 | Bernd Martin Krohn | Aufsichtsrat b) Erstmeldung | Kauf | Aktie | 4,60 EUR | EUR | 991 | 4.558,60 EUR | Open filing |
Showing 13 of 13 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
The underlying filing feed is unavailable in this snapshot; this is not a claim that no filings exist.
Snapshot & identity
- Snapshot date
- 2026-10-18
- Ticker
- R1B.F
- ISIN
- DE0005120802
- Sector
- Technology
- Industry
- Software—Infrastructure
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