Please Note: Blog posts are not selected, edited or screened by Seeking Alpha editors.

Tandem Diabetes Care, Inc. (TNDM) And ADMA Biologics Inc (ADMA) Activist Update

|Includes: ADMA, Tandem Diabetes Care, Inc. (TNDM)

When a person or group of persons acquires beneficial ownership of more than 5% of a company’s equity securities, they are required to file a Schedule 13D or 13G with the SEC. If these groups intend to influence management into changing the business strategy, they are considered "activist" investors. There is considerable academic research that suggest activist investors contribute to excess returns in equities in the subsequent twelve months after the event.

Flynn James E has filed an SC 13G form with the Securities and Exchange Commission (SEC) disclosing ownership of 2,773,861 shares of Tandem Diabetes Care, Inc.(NASDAQ:TNDM). This represents 5.54 percent ownership of the company. Tandem Diabetes Care, Inc. has declared a standard industrial code (sic) of 3841 which is the "Surgical and Medical Instruments and Apparatus" industry.

Broadfin Capital, LLC has filed an SC 13G form with the Securities and Exchange Commission (SEC) disclosing ownership of 3,249,829 shares of ADMA Biologics Inc(NASDAQ:ADMA). This represents 7.21 percent ownership of the company. Previously, Broadfin Capital, LLC had reported owning 1,102,200 shares, indicating an increase of 194.85 percent. ADMA Biologics Inc has declared a standard industrial code (sic) of 2836 which is the "Biological Products, Except Diagnostic Substances (Biotech)" industry.

Investors that acquire 10% or more of a company's shares, or that gain a board seat, are considered insiders by the SEC and are subject to stricter insider trading filing requirements.

New Activist Investor Filings

Investors that acquire more than 5% of the shares of a company and intend to influence management are considered activist investors and must file a 13D.

Motus GI Holdings, Inc. (NASDAQ:MOTS) - Orchestra Biomed, Inc. has filed a new SC 13D, reporting a 12.80% ownership stake in Motus GI Holdings.

NXP Semiconductors N.V. (NASDAQ:NXPI) - Elliott Associates, L.P. has filed a new SC 13D, reporting a 3.40% ownership stake in NXP Semiconductors N.V.. This is an increase of 3.03% from their previous filing.

Iterum Therapeutics plc (NASDAQ:ITRM) - Arix Bioscience Plc has filed a new SC 13D, reporting a 7.40% ownership stake in Iterum Therapeutics.

Skyline Corp. (NYSE:SKY) - Centerbridge Capital Partners L P has filed a new SC 13D, reporting a 24.80% ownership stake in Skyline.

Skyline Corp. (NYSE:SKY) - Mak Capital One Llc has filed a new SC 13D, reporting a 24.30% ownership stake in Skyline.

EuroDry Ltd. (NASDAQ:EDRY) - Tennenbaum Capital Partners Llc has filed a new SC 13D, reporting a 24.40% ownership stake in EuroDry.

CorePoint Lodging Inc. (NYSE:CPLG) - Blackstone Holdings II L.P. has filed a new SC 13D, reporting a 30.20% ownership stake in CorePoint Lodging.

Skyline Corp. (NYSE:SKY) - Bain Capital Credit Member, Llc has filed a new SC 13D, reporting a 24.70% ownership stake in Skyline.

Alliance Resource Partners, L.P. (NASDAQ:ARLP) - Craft Kathleen S. has filed a new SC 13D, reporting a 14.30% ownership stake in Alliance Resource Partners.

Iterum Therapeutics plc (NASDAQ:ITRM) - New Leaf Venture Management Iii, L.l.c. has filed a new SC 13D, reporting a 10.40% ownership stake in Iterum Therapeutics.

Schmitt Industries, Inc. (NASDAQ:SMIT) - Sententia Capital Management, Llc has filed a new SC 13D, reporting a 6.59% ownership stake in Schmitt Industries.

Assurant, Inc. (NYSE:AIZ) - Tpg Advisors Vi-aiv, Inc. has filed a new SC 13D, reporting a 15.96% ownership stake in Assurant.

Amended Activist Investor Filings

USG Corp. (NYSE:USG) - Berkshire Hathaway Inc has filed an amended Schedule 13D/A, reporting a 31.10% ownership stake in USG. This is an increase of 0.32% from their previous filing.

Atlantic Coast Financial Corp. (NASDAQ:ACFC) - PL Capital, LLC has filed an amended Schedule 13D/A, reporting a 0.00% ownership stake in Atlantic Coast Financial. This is a decrease of 100.00% from their previous filing.

New Passive Investor Filings

Investors that acquire more than 5% of the shares of a company but have no intention of influencing management are considered passive investors and must file a 13G.

Kitov Pharamceuticals Holdings Ltd. (NASDAQ:KTOV) - Armistice Capital, Llc has filed a new SC 13G, reporting a 4.70% ownership stake in Kitov Pharamceuticals Holdings.

NOVELION THERAPEUTICS INC. (NASDAQ:NVLN) - Healthcare Value Capital, LLC has filed a new SC 13G, reporting a 7.02% ownership stake in NOVELION THERAPEUTICS.

Intellipharmaceutics International Inc. (NASDAQ:IPCI) - UBS Group AG has filed a new SC 13G, reporting a 16.10% ownership stake in Intellipharmaceutics International.

Ophthotech Corp (NASDAQ:OPHT) - UBS Group AG has filed a new SC 13G, reporting a 10.80% ownership stake in Ophthotech.

Nova Measuring Instruments Ltd. (NASDAQ:NVMI) - Clal Insurance Enterprises Holdings Ltd has filed a new SC 13G, reporting a 5.10% ownership stake in Nova Measuring Instruments. This is an increase of 6.25% from their previous filing.

Tandem Diabetes Care, Inc. (NASDAQ:TNDM) - Flynn James E has filed a new SC 13G, reporting a 5.54% ownership stake in Tandem Diabetes Care.

ADMA Biologics Inc (NASDAQ:ADMA) - Broadfin Capital, LLC has filed a new SC 13G, reporting a 7.21% ownership stake in ADMA Biologics. This is an increase of 196.71% from their previous filing.

HUYA Inc. (NYSE:HUYA) - Hillhouse Capital Management, Ltd. has filed a new SC 13G, reporting a 17.89% ownership stake in HUYA.

Medicines Company (NASDAQ:MDCO) - PointState Capital LP has filed a new SC 13G, reporting a 5.30% ownership stake in Medicines. This is an increase of 208.14% from their previous filing.

Clough Global Equity Fund (AMEX:GLQ) - Advisors Asset Management, Inc. has filed a new SC 13G, reporting a 6.05% ownership stake in Clough Global Equity Fund. This is an increase of 484.93% from their previous filing.

FreightCar America, Inc. (NASDAQ:RAIL) - Russell Investments Group, Ltd. has filed a new SC 13G, reporting a 10.80% ownership stake in FreightCar America.

GTT Communications, Inc. (NYSE:GTT) - Aleph Tiger Investors Lp has filed a new SC 13G, reporting a 7.20% ownership stake in GTT Communications.

Catalyst Biosciences Inc. (NASDAQ:CBIO) - Nexthera Capital Lp has filed a new SC 13G, reporting a 5.10% ownership stake in Catalyst Biosciences. This is an increase of 6.25% from their previous filing.

Patterson Companies, Inc. (NASDAQ:PDCO) - Price T Rowe Associates Inc /md/ has filed a new SC 13G, reporting a 11.20% ownership stake in Patterson Companies.

Cubic Corp. (NYSE:CUB) - Price T Rowe Associates Inc /md/ has filed a new SC 13G, reporting a 10.80% ownership stake in Cubic.

GCI Liberty, Inc. Class A (NASDAQ:GLIBA) - Price T Rowe Associates Inc /md/ has filed a new SC 13G, reporting a 10.40% ownership stake in GCI Liberty, Inc. Class A.

Fintel provides free investor tools for data driven investors. Get full coverage of ValueAct Holdings, L.P. or SRNE : Sorrento Therapeutics Stock Analysis and Research Report. Check out Fintel Dashboard.

Disclosure: I/we have no positions in any stocks mentioned, and no plans to initiate any positions within the next 72 hours.