MERRIMACK PHARMACEUTICALS INC 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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Officers and directors in the directory

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Levy Noah G.	0001788608	66
CROCKER GARY L	0001094201	74
Nielsen Ulrik B.	0001531962	15
Radeljevic Ana	0001934410	1
Nash Sarah E	0001345709	30
Andersen Eric	0001517667	58
Dineen John M.	0001645270	2
Sinskey Anthony J	0001368753	33
RAY RUSSELL T	0001225960	4
Drummond Daryl C	0001702984	1
Fehr Gordon J.	0001531946	3
Khan Fazal R.	0001531959	2
Lee Vivian S	0001625824	3
LOVENBERG WALTER M PHD	0001213100	14
McClements William M.	0001538792	6
MENDELSOHN JOHN	0001234382	1
Mulroy Robert J.	0001531563	8
PORTER MICHAEL E	0001108494	101
Quigley James H.	0001554331	12
Schoeberl Birgit M.	0001632653	3
Stewart Edward J.	0001531564	28
Sullivan William A.	0001531562	9

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.