Vounatsos Michel

Director, Chief Executive Officer, EVP & Chief Commercial Officer · SEC CIK 1672709
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Buy track record

How this insider's open-market purchases have performed
0%
of buys now in profit
0 up · 5 down
Avg return since buy−24.8%
Median return−26.2%
Best trade−12.8%
Worst trade−37.2%
Buys scored5
Average return by holding period — separates good entry timing from riding one long winner
After 1 month −0.2% 40% won · 5 trades
After 3 months −0.7% 60% won · 5 trades
After 6 months +9.9% 80% won · 5 trades
After 12 months +4.3% 40% won · 5 trades
DateCompany90d trendBuy priceValueΔOwn1M3M6M12MTo date
Nov 30, 2020 BIIB $241 $748K +9.8% +1.4% +12.4% +11.2% −1.8% −16.7%
May 1, 2019 BIIB $231 $1.01M +26% −2.7% +5.9% +30.4% +27.7% −12.8%
Dec 29, 2017 BIIB $321 $250K +19% +12.5% −14.0% −8.9% −5.5% −37.2%
May 1, 2017 BIIB $271 $380.4K +92% −6.9% +7.4% +16.5% +1.3% −26.2%
Feb 27, 2017 BIIB $285 $380.4K +999% −5.5% −15.3% +0.4% −0.4% −31.3%
How this is calculated. We score only open-market purchases (SEC code P) — the buys that carry real signal. Each trade's return is measured from the adjusted closing price on the purchase date to the latest close, accounting for stock splits and dividends. The 1M/3M/6M/12M columns show the same trade's return after each fixed holding period; a dash means that horizon hasn't elapsed yet or isn't priceable. Sales are excluded because insiders sell for many routine reasons. With only 5 scored trades, treat this as a small sample, not a verdict.
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Open-market buys
$2.77M
5 trades
Open-market sells
$0
0 trades
Net flow
+$2.77M
Net buying
Total filings
47
transactions shown

Full transaction history

All Form 4 activity across every company, newest first
View on SEC EDGAR ↗
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BIIB
Option exercise Vounatsos Michel · Director, Chief Executive Officer · Option exercise · filed Feb 23, 2022 ΔOwn +9.7%
+$0
6,191 sh
BIIB
Tax withholding Vounatsos Michel · Director, Chief Executive Officer · Tax withholding · filed Feb 23, 2022 ΔOwn −3.9%
−$576.1K
2,746 sh @ $210
BIIB
Option exercise Vounatsos Michel · Director, Chief Executive Officer · Option exercise · filed Feb 15, 2022 ΔOwn +6.7%
+$0
4,395 sh
BIIB
Tax withholding Vounatsos Michel · Director, Chief Executive Officer · Tax withholding · filed Feb 15, 2022 ΔOwn −2.8%
−$411.4K
1,917 sh @ $215
BIIB
Tax withholding Vounatsos Michel · Director, Chief Executive Officer · Tax withholding · filed Feb 15, 2022 ΔOwn −2.8%
−$418.5K
1,950 sh @ $215
BIIB
Tax withholding Vounatsos Michel · Director, Chief Executive Officer · Tax withholding · filed Feb 15, 2022 ΔOwn −6.9%
−$1.01M
4,699 sh @ $215
BIIB
Grant/award Vounatsos Michel · Director, Chief Executive Officer · Grant/award · filed Jan 21, 2022 ΔOwn +20%
+$0
10,594 sh
BIIB
Tax withholding Vounatsos Michel · Director, Chief Executive Officer · Tax withholding · filed Feb 17, 2021 ΔOwn −14%
−$2.02M
7,248 sh @ $278
BIIB
Option exercise Vounatsos Michel · Director, Chief Executive Officer · Option exercise · filed Feb 17, 2021 ΔOwn +9.7%
+$0
5,337 sh
BIIB
Tax withholding Vounatsos Michel · Director, Chief Executive Officer · Tax withholding · filed Feb 17, 2021 ΔOwn −4.2%
−$702K
2,525 sh @ $278
BIIB
Tax withholding Vounatsos Michel · Director, Chief Executive Officer · Tax withholding · filed Feb 17, 2021 ΔOwn −4.0%
−$648.6K
2,333 sh @ $278
BIIB
Tax withholding Vounatsos Michel · Director, Chief Executive Officer · Tax withholding · filed Feb 17, 2021 ΔOwn −4.3%
−$658.1K
2,367 sh @ $278
BIIB
Grant/award Vounatsos Michel · Director, Chief Executive Officer · Grant/award · filed Jan 29, 2021 ΔOwn +47%
+$0
16,343 sh
BIIB
Buy Vounatsos Michel · Director, Chief Executive Officer · Open-market purchase · filed Dec 1, 2020 ΔOwn +9.8%

Vounatsos Michel, BIIB's CEO, spent $748K of their own money on 3,100 shares at $241, growing their stake 10%.

+$748K
3,100 sh @ $241
BIIB
Option exercise Vounatsos Michel · Director, Chief Executive Officer · Option exercise · filed Feb 19, 2020 ΔOwn +17%
+$0
4,847 sh
BIIB
Tax withholding Vounatsos Michel · Director, Chief Executive Officer · Tax withholding · filed Feb 19, 2020 ΔOwn −6.4%
−$716K
2,150 sh @ $333
BIIB
Option exercise Vounatsos Michel · Director, Chief Executive Officer · Option exercise · filed Feb 14, 2020 ΔOwn +22%
+$0
5,760 sh
BIIB
Tax withholding Vounatsos Michel · Director, Chief Executive Officer · Tax withholding · filed Feb 14, 2020 ΔOwn −8.3%
−$776.3K
2,340 sh @ $332

Frequently asked questions

How is Vounatsos Michel's win rate calculated?

We take every open-market purchase (SEC code P) we can match to a stock price, then compare the split- and dividend-adjusted price on the purchase date to the most recent close. The win rate is the share of those buys currently trading above the purchase price. Sales and share grants are not scored.

Why are some buys not included in the score?

A purchase is excluded if we can't price it — for example if the ticker is missing from the filing, the company has been delisted, or the security isn't a common stock we can match to market data. Excluded counts are shown next to the scored total.

What do the 1M / 3M / 6M / 12M columns mean?

They show each purchase's return after a fixed holding period — one, three, six, and twelve months from the buy date — using split- and dividend-adjusted prices. This separates good entry timing from simply holding a long-running winner. A dash means that horizon hasn't elapsed yet for that trade, or the stock couldn't be priced at that date.

Does a high win rate mean I should copy this insider?

No. Past performance does not predict future results, sample sizes are often small, and an insider's edge in their own company doesn't transfer to yours. This is context, not a recommendation. InsiderSource is not investment advice.

Where does this data come from?

Trades come from Vounatsos Michel's SEC Form 4 filings on EDGAR. Prices come from public market data and are split/dividend-adjusted. Always verify against the original filings before acting.