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Sleeper Sentinel

Big board buy on a quiet, flat stock.

Open in Screener (Sleeper Sentinel) →🔔 Set Email AlertView 12-Month Backtest Data ↓

No rally to chase, no panic to catch — just a director putting six figures into a stock the market has stopped watching. Highest hit rate in the lineup at 66%, with the cleanest median (+2.4%).

How the rule fires

Insider role = Board · transaction is a buy · value ≥ €100,000 · trailing-month return between −5% and +5%.

Recently Fired (Live Signals)

20 live signals in last 60 days · Refreshed 2026-10-17Open in Screener →
Historical Validation

12-Month Backtest Performance

The equity curve and statistics below show how this rule performed across our 12-month out-of-sample backtest window (May 19, 2025 – April 19, 2026). Past performance is not indicative of future results.

Window: 2025-05-19 → 2026-04-19
Mean return @ 30d
+3.8%
Hit rate
66%
Trades scored
77
Unique tickers
47
Worst single loss
-17%
Signals / month
5.7
What €1,000 per signal would have done
Cumulative P&L
+€2,906
+3.8% mean per signal · 77 trades
€-235€618€1,471€2,325€3,1782025-05-192025-11-112026-04-09

Hypothetical, frictionless. €1,000staked the moment each signal fired, closed at the screen's default horizon. No trading costs, no slippage, no taxes. Backtest window 2025-05-19 → 2026-04-19.

12-Month Out-of-Sample Backtest Trades

Historical trades captured during the May 2025 – April 2026 backtest window to validate signal efficacy.

77 signals · 30-day horizon · €1,000 notional
Filing dateCompanyInsiderValueHorizonRaw return€ P&L
2026-04-09🇨🇭
Keda Industrial Group Co., Ltd.
$KEDA
Closely Associated (Keda Industrial Group Co., Ltd.)
Board Member
€467.2M30d+0.0%+€0
2026-04-08🇨🇭
Investis Holding SA
$IREN
Board Member (Investis Holding SA)
Board Member
€208k30d-1.3%−€13
2026-04-08🇨🇭
VZ Holding AG
$VZN
Board Member (VZ Holding AG)
Board Member
€300k30d-2.3%−€23
2026-03-25🇸🇪
Addtech AB
Fredrik Börjesson
Member of the Board of Directors
€183k30d+10.7%+€107
2026-03-25🇸🇪
Lagercrantz Group Aktiebolag
Fredrik Börjesson
Chairman of the Board of Directors
€172k30d+20.9%+€209
2026-03-24🇨🇭
Galderma Group AG
$GALD
Board Member (Galderma Group AG)
Board Member
€3.0M30d+12.0%+€120
2026-03-24🇨🇭
Sunrise Communications AG
$SUNN
Board Member (Sunrise Communications AG)
Board Member
€107k30d+0.3%+€3
2026-03-23🇨🇭
SGS SA
$SGSN
Board Member (SGS SA)
Board Member
€131k30d+1.6%+€16
2026-03-23🇨🇭
Holcim Ltd
$HOLN
Board Member (Holcim Ltd)
Board Member
€280k30d+11.0%+€110
2026-03-23🇨🇭
Partners Group Holding AG
$PGHN
Board Member (Partners Group Holding AG)
Board Member
€1.0M30d+17.2%+€172

+ 67 more historical trades — sign up to see

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⚠️ Risks

Sparse signal — about six events a month across all five tracked markets. Amrize buys made up 46% of the backtest result; the cohort's broad ticker count (47) hides that concentration in dollar terms.

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Free. Each alert names the company, insider, role, and value, with a link to the source filing. We add the safety filters we have (earnings-window suppression where data exists); we never wrap any screen as a recommendation.