CABOT MICROELECTRONICS CORP insider transactions

What is a Form 4?

Animation: what a Form 4 is, shown with one real example. Sonic Automotive (SAH) reporting owner Paul P. Rusnak bought 13,701 shares at $59.78 on Wednesday, October 7, 2026, transaction code P, an open-market purchase (S is a sale and A is an award from the company). A timeline marks the SEC's two-business-day filing deadline, which ends Friday, October 9. The SEC accepted the Form 4 at 4:33:21 PM ET on October 9, and NexusTrade treats it as public one minute later, at 4:34:21 PM ET. A lamp for NexusTrade's InsiderTrades indicator stays off from the trade date until that moment, then counts one purchase worth 13,701 × $59.78 = $819,045.78. — In this example the shares were bought on Oct 7, 2026, and NexusTrade's InsiderTrades indicator can count the purchase starting at 4:34:21 PM ET on Oct 9, one minute after the SEC accepted the Form 4.

A Form 4 is the SEC filing a company insider, such as an officer, director or 10% owner, uses to report a trade in the company's stock, generally within two business days. The animation follows one real filing as an example: Paul P. Rusnak's purchase of Sonic Automotive (SAH) shares on October 7, 2026.

The same reading applies to every row on this page. The trade date is when the shares changed hands. The available date is when NexusTrade treats the filing as public, and a NexusTrade InsiderTrades indicator counts a purchase (code P) or sale (code S) only from that moment. Code A awards are not counted as purchases.

Recent insider disclosures

This table includes purchases, sales and awards in the public filing record. Awards and open-market purchases are distinct transaction codes. For historical research, use the public availability date to determine when the transaction was knowable.

Read code P as a purchase, S as a sale and A as an award. An award is an acquisition, but it is not an open-market purchase. Open the filing receipt to check the transaction details.

Show the table · 0 rows, 7 columns

Filter rows

Scroll sideways to compare all columns. Select a heading to sort.

No records are available for this view.

Most recent 90-day source activity, up to 50 rows. No rows means no matching recent records, not no historical activity.

Officers and directors in the directory

Show the table · 27 rows, 3 columns

Filter rows

Scroll sideways to compare all columns. Select a heading to sort.


HILL RICHARD	0001185713	156
NOGLOWS WILLIAM P	0001201094	53
JOHNSON WILLIAM S	0001223693	87
KLEIN BARBARA A	0001116705	15
Birgeneau Robert J	0001319875	11
Damashek Yumiko	0001436878	22
Dysard Jeffrey Michael	0001764053	15
ECKSTEIN BERNSTEIN H CAROL	0001189831	123
FRAZEE JOHN P JR	0001037485	11
FULLER H LAURANCE	0001187553	31
Hui Richard	0001630630	2
Li David H	0001436880	51
MOONEY EDWARD J	0001012340	46
Mumford Colleen Elizabeth	0001789945	9
Naman Ananth	0001509949	41
PIKE DANIEL J	0001189839	83
Polezoes Lisa A	0001559386	14
ROMAN THOMAS S	0001278556	48
SMITH STEPHEN R	0001189882	91
SPIRO CLIFFORD L	0001271690	8
Weisman Adam	0001292249	16
WHITNEY SUSAN M	0001449512	6
WILKINSON STEVEN V	0001189842	5
WOBBY DANIEL S	0001189843	42
Woodland Daniel D.	0001630039	28
Xia Bailing	0001411830	12
Yu Albert YC	0001320023	85

Which transactions qualify for the company tracker

The company strategy uses verified officers and directors with qualifying acquisitions at this issuer. Other reporting owners may appear in source records without becoming strategy signals.

Strategy eligibility is held while filing coverage is unresolved.

Historical follower simulations are separate from these source transactions. They do not establish live trading results.