13D Filing: Grifols Sa and Aradigm Corp (NASDAQ:ARDM)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

(Amendment No. 1)

Under the Securities Exchange Act of 1934*

ARADIGM
CORPORATION

(Name of Issuer)

Common Stock,
no par value

(Title of Class of Securities)

038505400

(CUSIP Number)

Grifols, S.A.

Avinguda de la Generalitat, 152-158

Parc de Negocis Can Sant Joan

Sant Cugat del Valles 08174, Barcelona, Spain

Tel: +34 93 571 0500

Attention: David Bell

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

with a copy to:

Proskauer Rose LLP		Osborne Clarke S.L.P.
Eleven Times Square		Avenida Diagonal, 477
New York, NY 10036		Planta 20, 08036 Barcelona, Spain
Tel: (212) 969-3000		Tel: +34 93 419 1818
Attention: Peter G. Samuels, Esq.		Attention: Tomás Dagá

April 21, 2016

(Date of Event Which Requires Filing of this Statement)

If the filing person has
previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.
☐

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other
parties to whom copies are to be sent.

*	The remainder of this cover page shall be filled out for a reporting persons initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be
deemed to be filed for the purpose of Section 18 of the Securities Exchange Act of 1934 (Act) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the
Act (however, see the Notes).