SIGMA ALDRICH 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.

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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

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Bertsch Jan	0001477291	3
SACHDEV RAKESH	0001259543	5
WICKS FRANK	0001201187	128
COTTIER GILLES	0001210650	21
Feldker David P	0001335925	9
Green Eric Mark	0001336007	51
HARRIS MICHAEL	0001484499	1
HARVEY DAVID R	0001201182	63
HOGAN MICHAEL R	0001200839	111
HUMMEL LARRY M	0001200840	36
JULIEN DAVID	0001201801	24
KANAN MICHAEL F	0001461953	7
Keffer Richard A	0001316562	1
KELLEY RODNEY	0001200841	7
Krosley Kevin	0001365705	17
MCCOLLUM LEE	0001232023	4
METEER JAMES W	0001203147	1
MILLER GEORGE LLOYD	0001472382	8
MILLER KAREN J	0001200842	24
NAGARKATTI JAI	0001201802	20
Nash Avi M	0001344205	3
ONEIL WILLIAM C	0001190595	2
PORWOLL JOE	0001210653	2
Rau Douglas	0001345644	8
REINHARD J PEDRO	0001183691	7
RICHTER KIRK A	0001200843	11
Smoller David Adam	0001335952	17
SPATZ D DEAN	0001232042	4
TOAN BARRETT A	0001129892	15
Turza Carl S	0001361432	21
VAN DEN DOOL GERRIT	0001201803	8
Walton Steve	0001336761	3
YOUSAF SHAHED	0001223027	1
Zihlmann Josef	0001335888	19

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.