undamentalytics Newsletter

Praxis Precision Medicines, Inc. insider trading

Every open-market purchase and sale by Praxis Precision Medicines, Inc.'s officers, directors and largest shareholders since November 4, 2021, and what the share price did next.

No insider has bought shares on the open market in five years.

Insider purchase Insider sale Marker size reflects trade value. Weekly closes adjusted for splits; may be delayed.
Praxis Precision Medicines, Inc. insider open-market trades
DateInsiderTrade SharesPriceValue 1M after 3M after 6M after

From insiders' Form 4 filings with the SEC: open-market purchases and sales only (awards, option exercises and shares withheld for tax are excluded), combined to one line per insider per day. "Plan" marks trades the filing says were made under a pre-set Rule 10b5-1 trading plan, which are scheduled in advance. Price changes run from the close on the trade date; hover a figure for the change relative to the S&P 500. Past moves don't predict future ones.

Does following Praxis Precision Medicines, Inc.’s insiders pay?

From November 10, 2020 to November 21, 2025, 13 insiders reported 11 open-market purchases and 12 sales not made under a pre-set plan in Praxis Precision Medicines, Inc. Twelve months after each purchase was reported, the shares were −71.9% against the S&P 500 on average (median −74.0%), over 3 purchases with a full year of prices; 0% beat the index. After sales, the shares moved −23.2% against the index over 12 months (a negative figure means selling was the right call). That rests on fewer than 20 purchases, too few to read much into. Buying each purchase the day after it was reported, an equal amount each, held 12 months or until that insider reported a sale, would have turned $10,000 on November 11, 2020 into $1,115 by November 2, 2026, −30.9% a year. It held shares 30% of the time; the S&P 500 on those same days, with Treasury bills otherwise, made $13,591 (+5.3% a year), and held throughout $22,996 (+15.0%).

$0$10.0k$20.0k 2020202120222023202420252026 $23.0k$13.6k$1.1k
Copying Praxis Precision Medicines, Inc.'s insidersS&P 500, same days investedS&P 500, held throughout $10,000 copying every open-market purchase by Praxis Precision Medicines, Inc.'s insiders from November 11, 2020, before costs and taxes, marked weekly. Uninvested money earns the Treasury bill rate; the portfolio held shares 30% of the time.
Praxis Precision Medicines, Inc.: each insider's record
InsiderRolePurchases12 months after their purchasesBeat the S&P 500Sales12 months after their salesLatest report
Souza Marcio Chief Executive Officer 5 −70.8% (2) 0% 0 — June 27, 2023
Nemiroff Alex General Counsel and Secretary 1 — — 2 +117.2% (1) November 21, 2025
Blackstone Holdings I L.P. 10% owner 0 — — 2 −68.9% (2) August 25, 2021
Kelly Timothy Edwin Chief Financial Officer 2 −74.0% (1) 0% 0 — June 13, 2022
Mastrocola Lauren Principal Accounting Officer 0 — — 2 +117.2% (1) November 21, 2025
Mitchell Dean J Director 2 — — 0 — March 27, 2023
Blackstone Group Management L.L.C. 10% owner 0 — — 1 −72.4% (1) August 3, 2021
Blackstone Inc. 10% owner 0 — — 1 −75.4% (1) October 5, 2021
Blackstone Strategic Opportunity Associates L.L.C. 10% owner 0 — — 1 −73.2% (1) August 20, 2021
Bsof Parallel Master Fund L.P. 10% owner 0 — — 1 −73.0% (1) October 8, 2021
Desimone Jill Director 1 — — 0 — October 10, 2023
Gross Phillip 10% owner 0 — — 1 +30.1% (1) October 17, 2025
Schwarzman Stephen A 10% owner 0 — — 1 −65.0% (1) August 13, 2021

Moves are the shares’ return including dividends minus the S&P 500’s, from the close on the first trading day after each report; the number of trades with a finished 12-month window is in brackets. Green means the trade went the insider’s way (a purchase ahead of the index, a sale followed by the shares trailing it). A trade reported both by a director or officer and by a fund or company they are linked to counts once here, under the person. Purchases count only where the share price actually traded was at least $5. These figures describe what the shares did, not why anyone traded. Insiders across all companies.

When several insiders traded Praxis Precision Medicines, Inc.

Months when 2 or more insiders became net buyers, or 3 or more net sellers, of Praxis Precision Medicines, Inc. in reports dated in the 91 days before the month end, and how the stock did against the S&P 500 from that month end. After 2 selling crowds, −6.1%. One company's history is too short to judge by; the test across every company is the better guide.

MonthCrowd3 months on, vs S&P 5006 months12 months
November 28, 20253 selling+62.1%+19.6%not yet
August 31, 20214 selling−15.1%−31.9%−73.1%

Colours show whether the crowd was right: green when buyers were followed by a rise above the index, or sellers by a fall below it. Total returns from the month end; past patterns are not a forecast.

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