Sep 21, 2026Purchase of Shares
— · —
Ordinary shares of 5p each in the Company GB0001826634 · 1241 shares × 100.6754 USD · —
Open filingCOMPANY RESEARCH
Diploma PLC
DPLM.L · United Kingdom · Industrials · Industrial Distribution
INSIDER SIGNAL
Insider activity score：50.4 / 100
Buyers not named in the filings · 4 purchase line(s) · €148k net purchases
Europe #607 · United Kingdom #156
WHY THIS SIGNAL?
Score anatomy
Each bar shows the contribution to the current score; the weights and formula stay unchanged.
Cluster+17.1 / 35
How many distinct insiders bought in the cluster
Purchase size+19.3 / 25
Purchase value relative to company size and liquidity
Role+17.1 / 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 · ? involved
The role contribution uses the inverted role input of the current European model.
Buying concentration
The filings do not name the buyer, so who bought how much cannot be worked out.
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 |
|---|---|---|
| — | multiple quote currencies | Sep 21, 2026 |
| — | — | Jul 20, 2026 |
| — | 67.3 GBP | May 20, 2026 |
Model details
Cluster breakdown (does not change the score)
Not measured: the scoring window holds no purchase filing with both a buyer name and a trade date.
What the filings show
- 🟢 Recent eligible purchase
— · 144k mixed · Price multiple quote currencies · Sep 21, 2026 - 🟢 Eligible purchase
— · 0 GBP · Price — · Jul 20, 2026 - 🟢 Large eligible purchase
— · 12k GBP · Price 67.3 GBP · May 20, 2026
Insider vs stock price
3 purchase day(s), 4 purchase line(s) in the 180-day window.
Daily close (GBp)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 |
|---|---|---|---|---|
| 2026-05-21 | 1 | 1,142 +14.2% | 1,036 +3.6% | +106 +10.6 pts |
| 2026-07-20 | 1 | 1,060 +6.0% | 1,009 +0.9% | +51 +5.1 pts |
| 2026-09-23 | 1 | 1,026 +2.6% | 1,000 +0.0% | +26 +2.6 pts |
3 of 3 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 (274 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, 3 times, the latest (21 Sep). The share closed at 7,485.00 that day and at 7,815.00 most recently (+4.4%).
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 filing that states no amount gets the smallest dot.
Blue line: this share's price, +13.2% over these six months
The closing price of each day, from 6,905.00 on 2026-04-27 to 7,815.00 on 2026-10-15. 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, +4.2%
Taken from the 610 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 +13.2%, the typical one +4.2%, 8.9 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.
Who traded
| Insider | Role | Purchases | Sales | Bought | First purchase | Share price since | Earlier purchases |
|---|---|---|---|---|---|---|---|
| Unknown insider | Role not classified | 3 | — | — | 2026-05-20 | +13.8% | fewer than 5 completed |
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% | 0.488; source unavailable, filled with a cohort-neutral value | 17.1 |
| Qualified-buy size | 25% | 0.772 | 19.3 |
| Role informativeness (inverted) | 20% | 0.147; source unavailable, filled with a cohort-neutral value | 2.9 |
| 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.
All bull and bear lists, and what followed each line in the past →
Where the evidence comes from
- The insider purchases themselvesBearsmall purchases2 checked, under the threshold · 3 missing
- Share price and trading2 checked, under the threshold
- Short sellers1 checked, under the threshold
- Company results1 checked, under the threshold · 1 missing
- Company actions1 checked, under the threshold · 1 missing
Bull case · the buying is informative
Nothing held here goes beyond the fact that an insider bought.
Bear case · discount it
- Net purchases of €148k are <0.01% of the company's market value (€11.6bn): a visible sum, a small one against the business.
Evidence still missing
- This register does not name the filer, so the 4 purchase lines may come from one person or from several. Breadth of buying cannot be judged.
- Only one reading of profitability is held (profit margin 11%). Whether earnings and cash flow are rising or falling needs the last two reports side by side.
- The next scheduled results are on 2026-11-17. They are the first hard test of either reading.
- 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 4 purchase lines mentions a plan, but a bare “Purchase of Shares” 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, 1 close to it
- BearPublished net short positions add up to 1.98% of the share capital. Counted for the bear side from 2%. On 2026-10-09 it was 1.69%: up 0.29 points since. 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.
- BearThe share price changed +12% over six months (three months +7.9%, one month +9.0%) and stands 2.1% below its 52-week high. Counted for the bear side from a fall of 20%.
- BearOver three months the share price changed +7.9% and the median of 527 Industrials companies changed +<0.01%: ahead by 8 points. Counted for the bear side from 20 points behind.
- BullThe company announced no transaction in its own shares in the last 30 days.
- BearProfit margin on the latest captured figures is 11%. 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
50.4 / 100
Latest recorded score
→ +0.0 ptssince the first recorded snapshot on 2026-10-22; 1 calendar days observed
- Recorded snapshots
- 2
- First snapshot
- 2026-10-22
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
- 50.4
- 50.4
View all recorded scores
| Snapshot date | Signal score |
|---|---|
| 2026-10-22 | 50.4 |
| 2026-10-23 | 50.4 |
Sector context
- Buying breadth
- 8.4% (88 / 1,049 issuers)
- Sector rank
- #8 / 12
- 7D breadth change
- +0.3 pp · vs 2026-10-16 (7d)
- 30D breadth change
- -1.5 pp · vs 2026-09-23 (30d)
This is sector-level research context. It does not affect the Insider Signal or ranking.
Insider profile outcomes
The filings for this company do not name the buyer, so past purchases cannot be followed person by person.
Market context
PRICE PERFORMANCE
VOLATILITY & LIQUIDITY
- Volatility
- 29.0%
- Beta
- 0.87
- Avg daily volume
- £51.5M
VALUATION
- Market cap
- £9.7B
- P/E
- 51.5×
FUNDAMENTALS
- Profit margin
- 11.5%
- ROE
- 19.0%
- Industry
- Industrial Distribution
Prices to 15 Oct 2026: OpenBB/yfinance; volume from price cache (yfinance). From OpenBB/yfinance, captured 22 Oct 2026: Market cap, P/E, Profit margin, ROE, Beta, Industry. It does not affect the insider score or rank.
Disclosed net short positions
- Aggregate net short
- 1.98%
- Latest position date
- 21 Oct 2026
The FCA publishes one aggregate figure per issuer, the sum of all positions notified to it, and does not name the holders. Source: FCA · read 23 Oct 2026
Short-position disclosures are external context; they do not affect the insider score, ranking, or filing eligibility.
Insiders and institutions
Insiders, ranking window: €148.5k net bought · buyers: -1 · last 2026-09-21
Short sellers
- Sum of published positions
- 1.98%register total
- Change, about 4 weeks
- −0.03 ppfrom 2.01% on 2026-10-02
- Change, about 12 weeks
- +1.09 ppfrom 0.89% on 2026-08-07
- Published short, 6 months
- line: insiders' last purchase
The published short positions changed little while insiders bought.
Source: FCA, read 2026-10-23. Where holders are named, only positions of 0.5% of issued capital or more are published, so these are lower bounds and a change is a change in what was published. Context only; not part of the score. All companies where insiders buy and short sellers hold positions →
Major holders (3% and above)
| Holder | Voting rights | Notified | Change |
|---|---|---|---|
| The Capital Group Companies, Inc. · large asset manager | 12.95% | 2026-10-21 | −0.87 pp |
| FMR LLC | 7.65% | 2026-09-16 | +2.38 pp |
| BlackRock, Inc. · large asset manager | 5.34% | 2026-03-20 | +0.32 pp |
Holders that notified a higher stake in the last 12 months: 2; a lower one: 2 (banks and brokers left out).
Source: FCA (TR-1). A holder must notify when its voting rights cross 3% and every whole percent above it; within a percent a holding can change without a notice. Banks and brokers often hold shares to hedge clients' trades; the largest asset managers' stakes are mostly index money. Context only; not part of the score.
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: 2026-10-15 · 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 2026-09-23 · trade date 2026-09-21
- Insider filing announcement · published 2026-07-20 · trade date 2026-07-20
- Insider filing announcement · published 2026-05-21 · trade date 2026-05-20
Unfold all 9 filings
- Insider filing announcement · published 2026-09-23 · trade date 2026-09-21
- Insider filing announcement · published 2026-07-20 · trade date 2026-07-20
- Insider filing announcement · published 2026-05-21 · trade date 2026-05-20
- Insider filing announcement · published 2026-03-23 · trade date 2026-03-19
- Insider filing announcement · published 2026-01-16 · trade date 2026-01-16
- Insider filing announcement · published 2026-01-15 · trade date 2026-01-15
- Insider filing announcement · published 2025-12-22 · trade date 2025-12-22
- Insider filing announcement · published 2025-11-26 · trade date 2025-11-26
- Insider filing announcement · published 2025-11-19 · trade date 2025-11-19
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
9 qualifying purchase disclosure(s) · 9 transaction line(s)
Sep 21, 2026Purchase of Shares
— · —
Ordinary shares of 5p each in the Company GB0001826634 · 246 shares × 76.96 GBP · —
Open filingJul 20, 2026Purchase of Shares
— · —
Ordinary shares of 5p each in the Company GB0001826634 · — shares × — · —
Open filingUnfold all 6 remaining filing row(s)
| Transaction date | Published | Filer | Role | Transaction | Instrument | Price (local currency) | Quote currency | Volume | Source |
|---|---|---|---|---|---|---|---|---|---|
| 2026-05-20 | 2026-05-21 | — | — | Purchase of Shares | Ordinary shares of 5p each in the Company GB0001826634 | 67.30 GBP | GBP | 177 | Open filing |
| 2026-03-19 | 2026-03-23 | — | — | Purchase of Shares | Ordinary shares of 5p each in the Company GB0001826634 | 59.25 GBP | GBP | 251 | Open filing |
| 2026-03-19 | 2026-03-23 | — | — | Purchase of Shares | Ordinary shares of 5p each in the Company GB0001826634 | 58.34 GBP | GBP | 535 | Open filing |
| 2026-03-19 | 2026-03-23 | — | — | Purchase of Shares | Ordinary shares of 5p each in the Company GB0001826634 | 58.20 GBP | GBP | 500 | Open filing |
| 2026-01-15 | 2026-01-15 | — | — | Purchase of shares | Ordinary shares of 5p each in the Company GB0001826634 | 56.15 GBP | GBP | 500 | Open filing |
| 2026-01-15 | 2026-01-15 | — | — | Purchase of shares | Ordinary shares of 5p each in the Company GB0001826634 | 56.45 GBP | GBP | 352 | Open filing |
Showing 9 of 9 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 9 other transaction(s)
Jan 16, 2026Sale of shares
— · —
Ordinary shares of 5p each in the Company GB0001826634 · 30000 shares × 56.68 GBP · —
Open filingDec 22, 20251) Purchase of shares 2) Grant of PSP shares
— · —
Ordinary shares of 5p each in the Company GB0001826634 · 410 shares × — · —
Open filingDec 22, 20251) Purchase of shares 2) Grant of PSP shares
— · —
Ordinary shares of 5p each in the Company GB0001826634 · 12289 shares × — · —
Open filingUnfold all 6 remaining filing row(s)
| Transaction date | Published | Filer | Role | Transaction | Instrument | Price (local currency) | Quote currency | Volume | Source |
|---|---|---|---|---|---|---|---|---|---|
| 2025-11-26 | 2025-11-26 | — | — | Grant of PSP shares | Ordinary shares of 5p each in the Company GB0001826634 | — | GBP | 55213 | Open filing |
| 2025-11-26 | 2025-11-26 | — | — | Grant of PSP shares | Ordinary shares of 5p each in the Company GB0001826634 | — | GBP | 9856 | Open filing |
| 2025-11-19 | 2025-11-19 | — | — | Exercise of awards made under the Diploma Performance Share Plan | Ordinary shares of 5p each in the Company GB0001826634 | — | GBP | 79424 | Open filing |
| 2025-11-19 | 2025-11-19 | — | — | Exercise of awards made under the Diploma Performance Share Plan | Ordinary shares of 5p each in the Company GB0001826634 | — | GBP | 9433 | Open filing |
| 2025-11-19 | 2025-11-19 | — | — | Sale of Shares to cover tax and national insurance | Ordinary shares of 5p each in the Company GB0001826634 | 52.59 GBP | GBP | 37407 | Open filing |
| 2025-11-19 | 2025-11-19 | — | — | Sale of Shares to cover tax and national insurance | Ordinary shares of 5p each in the Company GB0001826634 | 52.59 GBP | GBP | 4446 | Open filing |
Showing 9 of 9 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.
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Snapshot & identity
- Snapshot date
- 2026-10-23
- Ticker
- DPLM.L
- ISIN
- GB0001826634
- Sector
- Industrials
- Industry
- Industrial Distribution
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