The most significant insider buy on today's list is a Form 4 filed by Super Micro Computer $SMCI Director Shiu Leung Chan.

Chan reported a $256,440 purchase of SMCI.

The most significant insider buy on today’s list is a Form 4 filing by New York Community Bancorp $NYCB Director Ronald A. Rosenfeld.

Rosenfeld reported a purchase of roughly $756,756 in NYCB.

Both Icahn School of Medicine at Mount Sinai and CMLS Holdings LLC filed Form 4s for a combined amount of $40 million in GeneDx Holdings Corp $WGS.

Activist investor and retail industry entrepreneur Ryan Cohen took a stake in Nordstrom $JWN, sending the stock higher by more than 20% Friday.

The most significant insider buy on today’s list is a Form 4 filing by Greg Hayes, the CEO of Raytheon Technologies $RTX.

Hayes reported a purchase of roughly $1 million in Phillips 66 $PSX, where he serves as a director.

The largest insider buy on today's list is a Form 4 filing by Steve Miron,  director at Charter Communications $CHTR.

Miron revealed the purchase of $960,875 worth of CHTR shares.

The largest insider buy on today's list is a Form 4 filing by Randal Kirk, the executive chairman of Precigen $PGEN.

Kirk revealed the purchase of roughly $20 million of his own stock from him, increasing his ownership stake to 46.2%.

The largest insider buy on today’s list is a Form 4 filing by CD&R Boulder Holdings LP.

The firm revealed a purchase of approximately $6 million worth of shares in Beacon Roofing Supply $BECN.

The most significant insider buy on today's list is a Form 4 filing by Abdiel Capital Advisors.

The hedge fund reported a purchase of $4.8 million in Appian Corporation $APPN.

The most significant insider buy on today’s list is a Form 4 filing by Lockheed Martin $LMT Director John Donovan.

Donovan reported a purchase of roughly $250,867 in LMT.

Today's Hot List is another short one.

The only 13G on our list was filed by Pura Vida Investments LLC, which revealed an initial stake of 5.62% in Quanterix Corporation $QTRX.

The largest insider buy on today's list is a Form 4 filing by RA Capital Management.

The hedge fund reported a purchase of roughly $25 million in Fulcrum Therapeutics Inc $FULC, increasing its ownership stake to 23.8%.

The largest insider buy on today's list is a Form 4 filing by EcoR1 Capital LLC, which reported a purchase of roughly $2.9 million in Zymeworks Inc $ZYME.

EcoR1 Capital also filed a Form 13G, disclosing a stake of 7.80% in the cancer biotech stock Janux Therapeutics $JANX.