Insider Profile
Bernardini, Marina
1
Companies Filed At
7
Open-Market Buys (2yr)
$1.1M
Buy Value (2yr, open-market)
May 20, 2025
Most Recent Trade
36
Credibility
Score
52%
Hit Rate
+16.0%
Avg 90d Return
+10.4%
Median 90d Return
21
Evaluated Trades
+71.3%
Best Trade
-31.1%
Worst Trade
Hit rate and returns are based on 21 open-market buys with evaluable 90-day outcomes. Score reflects historical conviction, not a guarantee of future performance. Limited signal — either below-average timing or insufficient trade history.
Cross-Company Track Record
THIN HISTORY
100%
Hit Rate · 90d
+5.4%
Median Alpha · 90d
1
Closed Buys Evaluated
100%
Beat XIU
All-insider base rate: 59% hit rate  · +1.3% mean alpha (n=11504)
cluster buyer high frequency size concentrated
Entry: closing price on SEDI filing date (point-in-time). Exit: 90 calendar days later. Alpha vs XIU.TO (iShares TSX 60). Closed trades only. Not investment advice.
Research 1 closed buys with individual return outcomes available on the Research plan.
Date Company Role Nature Dir. Shares Price Value Score
May 20, 2025 $SGML
Sigma Lithium Corporation
— Open Market Buy 10,000 $5.90 $59K 80
May 20, 2025 $SGML
Sigma Lithium Corporation
— Open Market Buy 95,097 $5.84 $555K 80
May 16, 2025 $SGML
Sigma Lithium Corporation
— Open Market Buy 13,000 $6.60 $86K 80
May 15, 2025 $SGML
Sigma Lithium Corporation
— Open Market Buy 32,928 $7.00 $230K 80
May 14, 2025 $SGML
Sigma Lithium Corporation
— Open Market Buy 10,000 $7.56 $76K 80
May 14, 2025 $SGML
Sigma Lithium Corporation
— Open Market Buy 10,000 $7.58 $76K 80
May 13, 2025 $SGML
Sigma Lithium Corporation
— Open Market Buy 300 $7.90 $2K 80
Aug 08, 2024 $SGML
Sigma Lithium Corporation
— Open Market Buy 6,341 $9.38 $59K 80
Aug 07, 2024 $SGML
Sigma Lithium Corporation
— Open Market Buy 10,000 $9.08 $91K 80
Aug 07, 2024 $SGML
Sigma Lithium Corporation
— Open Market Buy 10,000 $9.12 $91K 80
Aug 07, 2024 $SGML
Sigma Lithium Corporation
— Open Market Buy 10,000 $9.46 $95K 80
Aug 07, 2024 $SGML
Sigma Lithium Corporation
— Open Market Buy 7,368 $9.52 $70K 80
Aug 06, 2024 $SGML
Sigma Lithium Corporation
— Open Market Buy 1,291 $9.00 $12K 80
Jul 17, 2023 $SGML
Sigma Lithium Corporation
— Exercise Sell 275,000 — — 80
Jul 17, 2023 $SGML
Sigma Lithium Corporation
— Exercise Buy 275,000 — — 80
Jun 29, 2023 $SGML
Sigma Lithium Corporation
— Comp. Grant Buy 83,334 — — 80
Jun 29, 2023 $SGML
Sigma Lithium Corporation
— Comp. Grant Buy 83,334 — — 80
Oct 28, 2022 $SGML
Sigma Lithium Corporation
— Comp. Grant Buy 83,333 — — 80
Oct 28, 2022 $SGML
Sigma Lithium Corporation
— Comp. Grant Buy 83,333 — — 80
Jun 20, 2022 $SGML
Sigma Lithium Corporation
— Exercise Buy 15,000 — — 80
Jun 20, 2022 $SGML
Sigma Lithium Corporation
— Exercise Sell 15,000 — — 80
Jun 01, 2021 $SGML
Sigma Lithium Corporation
— Comp. Grant Buy 83,333 — — 80
Jun 01, 2021 $SGML
Sigma Lithium Corporation
— Comp. Grant Buy 83,333 — — 80
Muted rows are plan purchases, compensation grants, or DRIP — not open-market. Confluence Scores reflect the company's current score, not the score at time of trade.
Form55 provides data and analysis for informational purposes only. Nothing on this site constitutes investment advice or a recommendation to buy or sell any security. Past performance is not indicative of future results.