| Period | Completed events | Price coverage | Hit rate | Median excess return | Average excess return | Worst excess return |
|---|---|---|---|---|---|---|
| 5D | 46Established evidence | 100.0% (46/46) | 19.6% (9/46) | -1.9% | -1.5% | -10.6% |
| 20D | 46Established evidence | 100.0% (46/46) | 32.6% (15/46) | -3.2% | -2.2% | -16.3% |
| 60D | 31Established evidence | 100.0% (31/31) | 38.7% (12/31) | -0.7% | -2.2% | -33.5% |
| 120D | 30Established evidence | 100.0% (30/30) | 33.3% (10/30) | -3.7% | -6.2% | -41.3% |
COMPANY RESEARCH
Devyser Diagnostics AB
DVYSR.ST · Sweden · Healthcare · Medical Devices
INSIDER SIGNAL
Insider activity score：52.4 / 100
2 insiders · 13 purchase events · €278k net purchases
Europe #541 · Sweden #140
WHY THIS SIGNAL?
Score anatomy
Each bar shows the contribution to the current score; the weights and formula stay unchanged.
Cluster+21.0 / 35
How many distinct insiders bought in the cluster
Purchase size+20.3 / 25
Purchase value relative to company size and liquidity
Role+20.0 / 20
The seniority and relevance of participating insiders
Recency+1.1 / 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
- ⚠ 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
78%
Largest buyer：Mia Arnhult · 2.42m SEK
Gross qualified purchase transaction-line value：3.10m SEK
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 |
|---|---|---|
| Jan Wahlström | 54.0449 SEK | Sep 15, 2026 |
| Mia Arnhult | 60 SEK | Sep 3, 2026 |
| Mia Arnhult | 64.62 SEK | Jul 27, 2026 |
Model details
Cluster breakdown (does not change the score)
- 15-day buyer breadth (count)
- 2 distinct reported filers
- Peak time window
- 2026-07-20 to 2026-08-04
- Current breadth input
- 0.600 (capped at 4+ buyers)
- Buyer independence
- Not yet measured; related-party fields are not cross-market comparable
What the filings show
- 🟢 Recent eligible purchase
Jan Wahlström · 54k SEK · Price 54.0449 SEK · Sep 15, 2026 - 🟢 Eligible purchase
Mia Arnhult · 120k SEK · Price 60 SEK · Sep 3, 2026 - 🟢 Large eligible purchase
Mia Arnhult · 928k SEK · Price 64.62 SEK · Jul 27, 2026 - 🟡 13 remaining qualified transaction line(s) across 13 disclosure(s)
- 🔴 4 other transaction line(s) are not counted as discretionary-buying evidence; 0 have zero price
Insider vs stock price
13 purchase day(s), 16 purchase line(s) in the 180-day window.
Daily close (SEK)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 | 545 −45.5% | 918 −8.2% | −373 −37.3 pts |
| 2026-07-22 | 1 | 806 −19.4% | 959 −4.1% | −154 −15.4 pts |
| 2026-07-28 | 1 | 821 −17.9% | 947 −5.3% | −126 −12.6 pts |
| 2026-07-29 | 1 | 767 −23.3% | 948 −5.2% | −181 −18.1 pts |
| 2026-07-30 | 1 | 756 −24.4% | 947 −5.3% | −192 −19.2 pts |
| 2026-08-05 | 1 | 827 −17.3% | 944 −5.6% | −117 −11.7 pts |
| 2026-08-12 | 1 | 848 −15.2% | 946 −5.4% | −97 −9.7 pts |
| 2026-08-25 | 1 | 881 −11.9% | 955 −4.5% | −73 −7.3 pts |
| 2026-09-03 | 1 | 883 −11.7% | 951 −4.9% | −68 −6.8 pts |
| 2026-09-16 | 1 | 970 −3.0% | 967 −3.3% | +4 +0.4 pts |
1 of 10 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 (439 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 within 12 days, 20 Jul to 31 Jul: 1 CEO / chair, 1 Board member. 2 of them bought again later. The share closed at 63.00 on the first of those days and at 52.60 most recently (−16.5%). That week 167 companies across Europe disclosed insider purchases, an ordinary week (19 of the last 26).
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.
▮Purple band: several insiders bought within 15 days
The band marks the stretch with the most different buyers: at most 15 days long and at least two people. Here it is 20 Jul – 31 Jul, with 2 insiders. Only the strongest stretch is marked. Several people deciding the same thing is harder to explain by one person's private reasons, but insiders often buy together just after a closed period ends, so compare it with the grey weekly bars.
Blue line: this share's price, −39.7% over these six months
The closing price of each day, from 87.30 on 2026-04-21 to 52.60 on 2026-10-07. 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, −9.1%
Taken from the 457 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 −39.7%, the typical one −9.1%, 30.7 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. The purple bar is the week of the band above: 167 companies, number 19 of the last 26 weeks. If that week was a peak anyway, buying together is less special than it looks.
This company: insiders buying per month, last 12 months
2Nov
Dec
Jan
1Feb
1Mar
Apr
1May
Jun
2Jul
1Aug
2Sep
Oct
Darker bars are inside the 180-day window above.
Who traded
| Insider | Role | Purchases | Sales | Bought | First purchase | Share price since | Earlier purchases |
|---|---|---|---|---|---|---|---|
| Jan Wahlström | CEO / chair | 5 | — | 675.5k SEK | 2026-05-20 | −43.4% | 5 completed, median −25.5% against peers after 60 sessions |
| Mia Arnhult | CEO / chair | 8 | — | 2.4M SEK | 2026-07-24 | −15.4% | 31 completed, median −0.7% 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% | 0.600 | 21.0 |
| Qualified-buy size | 25% | 0.813 | 20.3 |
| Role informativeness (inverted) | 20% | 0.000 | 0.0 |
| Recency | 10% | 0.109 | 1.1 |
| 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: new on the bull side: large purchases. 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, senior executive buying), while share price and trading argue against (price down over six months). No data is held for: company actions.
- The insider purchases themselvesBulllarge purchases, senior executive buying Bearassociated persons buying, usual level for this company, buyer's past purchases trailed the benchmark4 checked, under the threshold · 2 missing
- Share price and tradingBearprice down over six months1 checked, under the threshold
- Short sellers1 checked, under the threshold
- Company results1 checked, under the threshold · 1 missing
- Company actionsno data held
Bull case · the buying is informative
- Net purchases of €278k equal 0.37% of the company's market value (€75.3M): large for the size of the business.
- 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
- 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%).
- Buying at this level is normal here: 2 insiders bought in the previous 180 days and 2 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%).
- Share price and tradingThe share price is down 32% over six months (three months −15%, one month −12%). Insiders have bought into a fall the market has not reversed.Record (nearest stored case: price 20% or more below its prior 52-week high): after 11,077 earlier disclosures like this, the median 60-session excess return was −3.2%, within 1 percentage point of all comparable disclosures (−2.6%).
- The 31 earlier purchases by Mia Arnhult trailed OMX Stockholm 30 by a median 0.65% over the following 60 trading days.
Evidence still missing
- Only one reading of profitability is held (profit margin 6.2%). 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 16 purchase lines mentions a plan, but a bare “Förvärv” 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: 7, 2 close to it
- BullAt most 2 insiders bought within any 15 days. Counted for the bull side from 3. close to the threshold
- BearThe largest buyer accounts for 78% of the value bought. Counted for the bear side from 80%. close to the threshold
- BearNo insider sale is recorded in the same 180 days.
- EitherThe latest purchase is 32 days old. Bull up to 14 days, bear from 90.
- BearOver three months the share price changed −15% and the median of 271 Healthcare companies changed −6.3%: behind by 8 points. Counted for the bear side from 20 points behind.
- BearThe register of Finansinspektionen 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.
- BearProfit margin on the latest captured figures is 6.2%. Counted for the bear side when negative.
Both columns arrange stored facts only. They do not change the insider score or the ranking and are not investment advice.
Signal history
52.4 / 100
Latest recorded score
↓ -3.6 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.
- Recency-3.6 pts
Signal score history
Fixed 0–100 scale; dates are spaced by calendar time.
Recent recorded points
- 57.4
- 58.9
- 55.4
- 53.5
- 52.4
View all recorded scores
| Snapshot date | Signal score |
|---|---|
| 2026-08-26 | 57.4 |
| 2026-08-27 | 57.4 |
| 2026-08-28 | 59.4 |
| 2026-08-31 | 57.9 |
| 2026-09-01 | 57.4 |
| 2026-09-02 | 57.0 |
| 2026-09-03 | 61.4 |
| 2026-09-04 | 60.7 |
| 2026-09-07 | 58.9 |
| 2026-09-08 | 58.4 |
| 2026-09-09 | 57.9 |
| 2026-09-10 | 57.5 |
| 2026-09-11 | 57.1 |
| 2026-09-14 | 56.0 |
| 2026-09-23 | 57.0 |
| 2026-09-24 | 56.7 |
| 2026-09-25 | 56.3 |
| 2026-09-28 | 55.4 |
| 2026-09-29 | 55.1 |
| 2026-09-30 | 54.8 |
| 2026-10-01 | 54.6 |
| 2026-10-02 | 54.4 |
| 2026-10-03 | 54.4 |
| 2026-10-04 | 54.4 |
| 2026-10-05 | 53.8 |
| 2026-10-06 | 53.6 |
| 2026-10-07 | 53.5 |
| 2026-10-08 | 53.3 |
| 2026-10-09 | 53.2 |
| 2026-10-12 | 52.8 |
| 2026-10-13 | 52.7 |
| 2026-10-14 | 52.7 |
| 2026-10-15 | 52.6 |
| 2026-10-16 | 52.5 |
| 2026-10-18 | 52.4 |
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 − OMX Stockholm 30 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 | 10Developing evidence | 100.0% (10/10) | 70.0% (7/10) | +1.1% | +990.5% | -7.2% |
| 20D | 10Developing evidence | 100.0% (10/10) | 60.0% (6/10) | +6.2% | +996.0% | -7.5% |
| 60D | 9Developing evidence | 100.0% (9/9) | 11.1% (1/9) | -7.0% | +1087.1% | -42.0% |
| 120D | 6Developing evidence | 100.0% (6/6) | 83.3% (5/6) | +4946.9% | +4942.3% | -21.0% |
| Period | Completed events | Price coverage | Hit rate | Median excess return | Average excess return | Worst excess return |
|---|---|---|---|---|---|---|
| 5D | 6Developing evidence | 100.0% (6/6) | 33.3% (2/6) | -4.5% | -2.6% | -8.2% |
| 20D | 6Developing evidence | 100.0% (6/6) | 0.0% (0/6) | -9.5% | -9.4% | -14.6% |
| 60D | 5Developing evidence | 100.0% (5/5) | 0.0% (0/5) | -25.5% | -23.9% | -41.4% |
| 120D | 3Small sample | 100.0% (3/3) | 0.0% (0/3) | -37.3% | -41.9% | -64.9% |
Market context
PRICE PERFORMANCE
VOLATILITY & LIQUIDITY
- Volatility
- 48.5%
- Beta
- 0.82
- Avg daily volume
- SEK 882,207.2
VALUATION
- Market cap
- SEK 839.4M
- P/E
- 54.3×
FUNDAMENTALS
- Profit margin
- 6.2%
- ROE
- 4.3%
- Industry
- Medical Devices
Prices to 07 Oct 2026: price cache (Eulerpool). From OpenBB/yfinance, captured 18 Oct 2026: Market cap, P/E, Profit margin, ROE, Beta, Industry. It does not affect the insider score or rank.
Disclosed net short positions
The Finansinspektionen 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: 252 verified sessions · Latest session: 2026-10-07 · 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
23 qualifying purchase disclosure(s) · 23 transaction line(s)
Sep 15, 2026Förvärv
Jan Wahlström · Verkställande direktör (VD)
Aktie · 1000.0 shares × 54.0449 SEK · —
Sep 3, 2026Förvärv
Mia Arnhult · Styrelseordförande
Aktie · 2000.0 shares × 60.0 SEK · —
Aug 25, 2026Förvärv
Mia Arnhult · Styrelseordförande
Aktie · 568.0 shares × 59.50 SEK · —
Unfold all 20 remaining filing row(s)
| Transaction date | Published | Filer | Role | Transaction | Instrument | Price (local currency) | Quote currency | Volume | Source |
|---|---|---|---|---|---|---|---|---|---|
| 2026-08-11 | 2026-08-12 | Mia Arnhult | Styrelseordförande | Förvärv | Aktie | 63.01 SEK | SEK | 5000.0 | — |
| 2026-08-04 | 2026-08-05 | Mia Arnhult | Styrelseordförande | Förvärv | Aktie | 65.8 SEK | SEK | 250.0 | — |
| 2026-07-31 | 2026-08-05 | Mia Arnhult | Styrelseordförande | Förvärv | Aktie | 65.40 SEK | SEK | 2533.0 | — |
| 2026-07-28 | 2026-07-30 | Mia Arnhult | Styrelseordförande | Förvärv | Aktie | 66.98 SEK | SEK | 7944.0 | — |
| 2026-07-27 | 2026-07-30 | Mia Arnhult | Styrelseordförande | Förvärv | Aktie | 64.62 SEK | SEK | 14364.0 | — |
| 2026-07-24 | 2026-07-29 | Mia Arnhult | Styrelseledamot | Förvärv | Aktie | 61.64 SEK | SEK | 1545.0 | — |
| 2026-07-24 | 2026-07-28 | Mia Arnhult | Styrelseordförande | Förvärv | Aktie | 61.80 SEK | SEK | 1500.0 | — |
| 2026-07-24 | 2026-07-28 | Mia Arnhult | Styrelseordförande | Förvärv | Aktie | 62.40 SEK | SEK | 2000.0 | — |
| 2026-07-20 | 2026-07-22 | Jan Wahlström | Verkställande direktör (VD) | Förvärv | Aktie | 66.28 SEK | SEK | 3000.0 | — |
| 2026-07-20 | 2026-07-22 | Jan Wahlström | Verkställande direktör (VD) | Förvärv | Aktie | 66.0854 SEK | SEK | 2000.0 | — |
| 2026-05-22 | 2026-05-22 | Jan Wahlström | Verkställande direktör (VD) | Förvärv | Aktie | 96.5138 SEK | SEK | 1000.0 | — |
| 2026-05-21 | 2026-05-22 | Jan Wahlström | Verkställande direktör (VD) | Förvärv | Aktie | 94.8961 SEK | SEK | 2000.0 | — |
| 2026-05-20 | 2026-05-22 | Jan Wahlström | Verkställande direktör (VD) | Förvärv | Aktie | 92.9 SEK | SEK | 45.0 | — |
| 2026-03-20 | 2026-03-20 | Mia Arnhult | Styrelseordförande | Förvärv | Aktie | 77.0 SEK | SEK | 500.0 | — |
| 2026-03-18 | 2026-03-20 | Mia Arnhult | Styrelseordförande | Förvärv | Aktie | 79.40 SEK | SEK | 500.0 | — |
| 2026-03-18 | 2026-03-20 | Mia Arnhult | Styrelseordförande | Förvärv | Aktie | 79.26 SEK | SEK | 500.0 | — |
| 2026-02-18 | 2026-02-19 | Jan Wahlström | Verkställande direktör (VD) | Förvärv | Aktie | 100.59 SEK | SEK | 3000.0 | — |
| 2025-11-21 | 2025-11-25 | Mia Arnhult | Styrelseordförande | Förvärv | Aktie | 104.85 SEK | SEK | 135.0 | — |
| 2025-11-07 | 2025-11-11 | Mia Arnhult | Styrelseordförande | Förvärv | Aktie | 110.40 SEK | SEK | 14084.0 | — |
| 2025-11-05 | 2025-11-07 | Jan Wahlström | Verkställande direktör (VD) | Förvärv | Aktie | 105.3 SEK | SEK | 4100.0 | — |
Showing 23 of 23 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 6 other transaction(s)
Jun 10, 2026Lån mottaget
Mia Arnhult · Styrelseordförande
Aktie · 10000.0 shares × 97.40 SEK · —
Jun 10, 2026Lån mottaget
Mia Arnhult · Styrelseordförande
Aktie · 76251.0 shares × 92.0 SEK · —
Jun 2, 2026Lån utlåning
Mia Arnhult · Styrelseordförande
Aktie · 76251.0 shares × 92.0 SEK · —
Unfold all 3 remaining filing row(s)
| Transaction date | Published | Filer | Role | Transaction | Instrument | Price (local currency) | Quote currency | Volume | Source |
|---|---|---|---|---|---|---|---|---|---|
| 2026-05-26 | 2026-05-27 | Mia Arnhult | Styrelseordförande | Lån utlåning | Aktie | 97.40 SEK | SEK | 10000.0 | — |
| 2026-03-04 | 2026-03-05 | Mia Arnhult | Styrelseledamot | Lån mottaget | Aktie | 98.50 SEK | SEK | 9802.0 | — |
| 2026-02-18 | 2026-02-20 | Mia Arnhult | Styrelseledamot | Lån utlåning | Aktie | 98.50 SEK | SEK | 9802.0 | — |
Showing 6 of 6 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
- DVYSR.ST
- ISIN
- SE0016588867
- Sector
- Healthcare
- Industry
- Medical Devices
Company logos by Parqet