Rabinowitz Matthew, executive chairman of Natera (NTRA), has filed 125 Form 4 transactions, all in that single company. The pattern is one-sided: he has recorded zero open-market purchases and zero acquisitions, while selling $152.99 million worth of stock. The recent activity, spanning September and October 2026, shows 23 sales, with the largest cluster on October 15, 2026, when he executed 17 separate sale transactions. Those trades ranged from $111,059 to $4.17 million, with several above $2 million, including one at $2.54 million and another at $2.40 million.
The October 15 sales totaled roughly $19.5 million. On September 15, 2026, he sold another $10.75 million across six transactions, the largest being $5.09 million. The filings also include a $520,500 option exercise on October 15, which is mechanical and does not represent a purchase, and a gift on October 7 valued at zero. No Form 4 code for an open-market buy (P) appears anywhere in the record.
The concentration of sales in a two-month window, with no buys, points to a consistent selling bias. The dollar values are substantial, and the frequency of transactions on single days suggests a planned disposition of shares. The absence of any acquisition activity, whether through purchases or grants, makes the direction unambiguous. Rabinowitz has been a net seller of Natera stock throughout the period covered by these filings, with the most recent data showing that trend continuing into mid-October 2026.
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