MACK Stock Ownership Breakdown

A company's 13F filings with the Securities and Exchange Commission (SEC) provides investors with comprehensive information about institutional ownership in a listed company, a sign of strength in terms of how many institutions have confidence in that company. The number of institutional investors who currently own MACK shares is 101, representing 62.98% of the company's common stock.

SEPIO CAPITAL, LP, in the last quarter, reduced its stake in MACK by -2.65% restricting it's holding to 298.55 thousand shares of worth nearly $4.41M. GROUP ONE TRADING, L.P. also lessened -100% of the MACK shares from its portfolio, reducing its holding to 0 shares of worth -. FEDERATED HERMES, INC. also shunned MACK shares holding by -100% last quarter which brought its holding to 0 shares worth -.

As per its latest 13F filing, ADAR1 CAPITAL MANAGEMENT, LLC increased its stake in MACK by 64.24% in the last quarter. The institutional holder raised its holding to 902.35 thousand shares having worth more than $13.33M. INVESCO LTD. also added 2,196.73% more shares of MACK to its portfolio, raising its holding to 277.12 thousand shares of worth $4.09M. GEODE CAPITAL MANAGEMENT, LLC also increased its MACK shares holding by 4.64% which brought its holding to 272.02 thousand shares worth $4.02M.

The insider with the most stakes in MACK is Levy Noah G. , director at the company. Additionally, MACK stock is highly held by Ledo Capital, LLC and director Andersen Eric among others.

Company executives, directors, and other insiders own 1.19% percent of Merrimack Pharmaceuticals, Inc.'s stock. Within the last six months, there have been 0 transaction(s) in which MACK insiders have sold stock, totaling 0 shares. Insiders that have sold shares include .

There have been 0 transaction(s) during the past 6-months in which Merrimack Pharmaceuticals, Inc. insiders have bought stock, totalling 0 shares

Around 0 Merrimack Pharmaceuticals, Inc. shares are held by insiders, which represents about 1.19% of MACK stock.

MACK director, Levy Noah G. holds the largest portfolio of the company's shares. MACK shares owned by Levy total nearly 1.12 million.

WESTERN STANDARD LLC is the largest institutional owner in MACK which holds 2.17 million shares worth $32.09M or 15.15% of the total MACK shares outstanding followed by ADAR1 CAPITAL MANAGEMENT, LLC with ownership of 902.35 thousand shares representing 6.29% of the MACK ownership. SEPIO CAPITAL, LP is the third largest stakeholder with 298.55 thousand shares or 2.08% of the ownership worth more than $4.41M.

Stock options give the owner the ability but not the obligation to buy or sell a security at a predetermined price and date. Stock options can be classified into two types: puts and calls. A put is a bet on falling stock, and a call is a bet on rising stock. As far as the MACK is concerned, it is a stock which is not optionable.

Number of MACK shares short is 842.49K. Shares short is a market sentiment in which investors have sold their shares short in a given stock but have not yet covered them or closed them out.

As of today, 14.79M shares of MACK are outstanding.

Float represents the number of tradeable shares in a specific stock. By subtracting restricted and closely-held shares from a firm's total outstanding shares, we can calculate its floating stock. The term "closely-held shares" refers to shares held by employees, major shareholders, and company insiders. At present, MACK has 9.66M shares in float.

Short ratio is calculated by dividing the number of short shares, short interest or bets that shareholders will sell short from the average daily volume. A higher ratio indicates longer times needed to repurchase borrowed shares (sold). The short ratio for MACK is 8.65.