Stocks

Applied Optoelectronics, Inc. (AAOI) and Tandem Diabetes Care, Inc. (TNDM) Activist Update

Morgan Stanley has filed an SC 13G form with the Securities and Exchange Commission (SEC) disclosing ownership of 1,031,110 shares of Applied Optoelectronics, Inc. (NASDAQ:AAOI). This represents 5.3 percent ownership of the company. Previously, Morgan Stanley had reported owning 527,589 shares, indicating an increase of 95.44 percent. Applied Optoelectronics, Inc. has declared a standard industrial code (sic) of 3674 which is the “Semiconductors and Related Devices” industry.

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Dexcom Inc has filed an SC 13G form with the Securities and Exchange Commission (SEC) disclosing ownership of 2,500,000 shares of Tandem Diabetes Care, Inc. (NASDAQ:TNDM). This represents 5.6 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.

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.

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.

The Madison Square Garden Company (MSG) - Silver Lake Group, L.L.C. has filed a new SC 13D, reporting a new ownership stake in Madison Square Garden.

Aviragen Therapeutics, Inc. (AVIR) - Care Capital III LLC has filed a new SC 13D, reporting a 39.40% ownership stake in Aviragen Therapeutics.

Contravir Pharmaceuticals Inc (CTRV) - Cerrone Gabriel has filed a new SC 13D, reporting a 7.00% ownership stake in Contravir Pharmaceuticals. This is a decrease of 50.00% from their previous filing.

Layne Christensen Co. (LAYN) - Granite Construction Inc has filed a new SC 13D, reporting a 10.00% ownership stake in Layne Christensen Co..

Amended Activist Investor Filings

Appian Corp. (APPN) - Abdiel Qualified Master Fund LP has filed an amended Schedule 13D/A, reporting a 38.10% ownership stake in Appian. This is a decrease of 16.45% from their previous filing.

IAC/InterActiveCorp. (IAC) - Diller Barry has filed an amended Schedule 13D/A, reporting a 8.30% ownership stake in IAC. This is an increase of 2.47% from their previous filing.

Chemed Corp. (CHE) - Gamco Investors, Inc. Et Al has filed an amended Schedule 13D/A, reporting a 2.93% ownership stake in Chemed. This is a decrease of 21.24% from their previous filing.

Institutional Financial Markets, Inc. (IFMI) - Cohen Daniel G has filed an amended Schedule 13D/A, reporting a 39.01% ownership stake in Institutional Financial Markets. This is an increase of 4.81% from their previous filing.

Institutional Financial Markets, Inc. (IFMI) - Brafman Lester Raymond has filed an amended Schedule 13D/A, reporting a 22.19% ownership stake in Institutional Financial Markets. This is an increase of 4.18% from their previous filing.

Goodrich Petroleum Corporation (GDP) - Franklin Resources Inc has filed an amended Schedule 13D/A, reporting a 31.60% ownership stake in Goodrich Petroleum. This is a decrease of 24.04% from their previous filing.

Equitable Financial Corp. New (EQFN) - Elkhorn Partners Limited Partnership has filed an amended Schedule 13D/A, reporting an updated ownership stake in Equitable Financial.

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.

NanoVibronix, Inc. (NAOV) - Sabby Management, LLC has filed a new SC 13G, reporting a 7.33% ownership stake in NanoVibronix.

Moleculin Biotech, Inc. (MBRX) - Intracoastal Capital, Llc has filed a new SC 13G, reporting a 2.80% ownership stake in Moleculin Biotech.

Tandem Diabetes Care, Inc. (TNDM) - Dexcom Inc has filed a new SC 13G, reporting a 5.60% ownership stake in Tandem Diabetes Care.

Applied Optoelectronics, Inc. (AAOI) - Morgan Stanley has filed a new SC 13G, reporting a 5.30% ownership stake in Applied Optoelectronics. This is an increase of 96.30% from their previous filing.

The Wendy's Company (WEN) - Eminence Capital, Lp has filed a new SC 13G, reporting a 5.00% ownership stake in Wendy's. This is an increase of 4.17% from their previous filing.

EMCORE Corp. (EMKR) - Lytton Laurence W has filed a new SC 13G, reporting a 7.50% ownership stake in EMCORE.

Evans Bancorp, Inc. (EVBN) - FJ Capital Management LLC has filed a new SC 13G, reporting a 5.32% ownership stake in Evans Bancorp.

Catabasis Pharmaceuticals, Inc (CATB) - Corriente Advisors, Llc has filed a new SC 13G, reporting a 7.30% ownership stake in Catabasis Pharmaceuticals.

Amended Passive Investor Filings

Vonage Holdings Corp. (VG) - Vonage Holdings Corp has filed an amended Schedule 13D/A, reporting a 7.73% ownership stake in Vonage Holdings. This is a decrease of 25.60% from their previous filing.

SeaWorld Entertainment, Inc. (SEAS) - Blackstone Holdings III L.P. has filed an amended Schedule 13D/A, reporting a 0.10% ownership stake in SeaWorld Entertainment.

FibroGen, Inc. (FGEN) - Neff Thomas B has filed an amended Schedule 13D/A, reporting an updated ownership stake in FibroGen.

GSI Technology (GSIT) - Ching-Ho Cheng has filed an amended Schedule 13D/A, reporting a 5.30% ownership stake in GSI Technology. This is an increase of 6.00% from their previous filing.

Marriott Vacations Worldwide Corp (VAC) - Marriott John W Iii has filed an amended Schedule 13D/A, reporting an updated ownership stake in Marriott Vacations Worldwide.

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