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Actinium Pharmaceuticals, Inc. (ATNM)

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Last Post: 5/20/2019 8:23:33 AM - Followers: 112 - Board type: Free - Posts Today: 0

Actinium Pharmaceuticals, Inc. (ATNM: NYSE MKT) is a public biopharmaceutical company specialized in the development of cancer drugs. The Company’s product candidates are based on its patented technology co-developed with Memorial Sloan Kettering Cancer Center (MSKCC) for combining the cancer targeting precision of monoclonal antibodies (mAb) for targeting specific types of cells with the power of alpha emitting radioisotopes, the most potent cancer killing agents in existence. ATNM’s first drug for the treatment of acute myeloid leukemia (AML) has been administered to 49 patients with promising results and the second generation drug candidate is currently in clinical trials with 28 patients treated to date. In addition to leukemia drugs, ATNM’s technology has been used to produce drug candidates for treatment of metastatic colorectal and prostate cancers, antiangiogenesis (prevention of blood supply to and growth of many solid cancers) and bone marrow ablation, part of a curative treatment for leukemias, lymphomas and multiple myeloma.

Company intends to develop its products through Phase II clinical trials and it then intends to partner each drug for completion of development and commercialization with an appropriate third party. ATNM expects that its revenues will be derived from upfront payments, milestone payments and royalty payments, which payments comprise a standard structure of such partnering deals. In some markets, ATNM may seek to retain commercial rights and derive additional revenue from sales of its products.

ATNM’s largest shareholder is AHLB Holdings, LLC, which is wholly owned by Memorial Sloan Kettering Cancer Center. ATNM’s second largest shareholder is a subsidiary of Merck and Co.





APIT Platform



ATNM’s Alpha Particle Immunotherapy (APIT) platform is a highly potent and selective form of targeted radiotherapy.  It is based on attaching powerful alpha emitting radioisotopes Actinium 225 or Bismuth 213 to monoclonal antibodies (mAbs) which are large molecules capable of binding specifically to cancer cells.  By virtue of carrying alpha emitters, mAbs bring them directly to cancer cells where alpha emitters can selectively kill the targeted cell.  Figure below presents a schematic of a drug based on the Company’s APIT technology.

APIT based drug construct and its components


APIT based drug construct and its components


The power of alpha emitters is best understood when compared to beta emitters, an alternative form of radioisotope used in cancer drugs.  The killing power of a radioactive particle is directly proportional to its energy and inversely proportional to its range.  Alpha particle carries the most energy but travels the shortest path, while beta particle has less energy but goes farther in the body.

Comparison between α and β irradiation’s effect
on cancer cells and healthy tissues


Comparison between a and ß irradiation’s effect on cancer cells and healthy tissues


Being 100 times more powerful than beta particles, alpha therapy is effective in cancers that are not sensitive to beta irradiation.  Prime examples are the past and current clinical trials in AML.  APIT has demonstrated extremely high cancer cell kill levels even though AML is not considered particularly radiosensitive and radiotherapy is not used in treating the disease.  Based on these inherent isotope traits, the Company and Dr. David Scheinberg, Chairman of the Molecular Pharmacology and Chemistry Program at Memorial Sloan Kettering Cancer Center (MSKCC), ATNM’s key scientific collaborator, developed alpha particles as an ideal payload for targeted cancer radiotherapy.  While their potency is 100-fold higher than beta’s and cytotoxins’ significantly increases the killing power of alpha particle drugs against targeted tumor cells, their extremely short range limits any damage inflicted on healthy tissues.

In addition to its potency and range of emission, there are other key considerations for evaluating the suitability of particular radioisotopes for medical use.  Among them are half-life of the isotope, which is an indication of the period over which it remains radioactive, and its pharmacokinetics, i.e. its distribution in the body and its eventual elimination from it.  For these reasons, Actinium 225 (Ac-225) and the isotope derived from it, Bismuth 213 (Bi-213), were selected as lynchpins of the Company’s technology.  Both isotopes have relatively short half-lives and favorable and controllable pharmacokinetics.  However, for efficacy, logistics and cost reasons ATNM has decided to focus its efforts on Actinium 225 which has a 10 day half life versus Bismuth-213’s half life of 46 minutes.



Actinium Pharmaceuticals Drug Development Status


Product Pipeline V2


  1. HSCT stands for Hematopoietic Stem Cell Transplantation, a procedure in which cells capable of reconstituting normal bone marrow function are transplanted to a patient.
    ATNM has decided to discontinue development of Bismab-A at this time for supply, logistics and cost reasons. Actimab-A is the second generation drug of Bismab-A.
    Properties of Actinium 225 are uniquely suited for Antiangiogenesis and API is considering options for further development in that area.
    Antiangiogenesis therapies starve cancerous tumors by choking off blood supply to them.



Development Plan & Market Potential

Breakthrough Therapy Potential in Multiple Billion Dollar Markets

Over time, the biggest market potential for Actinium lies in the fact that its highly patented platform technology could be used to target a wide variety of cancers. Preclinical and clinical work has already focused on Non-Hodgkin Lymphoma (NHL), brain cancer, bladder cancer, ovarian cancer, breast cancer, prostate cancer, and a number of other cancer related indications.

Actinium intends to develop its product candidates through phase 2 clinical trials, and then plans to partner each drug for completion of development and commercialization with an appropriate third party. Revenues will be derived from upfront payments, milestone payments and royalty payments, which payments comprise a standard structure of such partnering deals. In some markets, Actinium may seek to retain commercial rights and derive additional revenue from sales of its products.

The compelling advantages of the Actinium's platform should continue to draw attention from the healthcare and investor communities. The company’s technology further illustrates the immense licensing and acquisition potential inherent in the company's high-momentum product pipeline. In fact its closest technology competitor, Algeta, which is about 3-4 years ahead from a market perspective, was just acquired by Bayer for $2.9 billion.


Market Potential of Product Pipeline



Phase I Trial with single dose of Actimab-A

In collaboration with Memorial Sloan Kettering Cancer Center (MSKCC) we are conducting a first-in-man Phase I dose escalation trial to determine the safety, pharmacology, and biological activity of Actimab-A in Acute Myeloid Leukemia (AML).  Eighteen patients (median age, 64 yrs; range, 45–80 yrs) with relapsed/refractory AML were treated to date.  Patients received a single infusion of Actimab-A at doses of 0.5, 1, 2, 3, or 4 µCi/kg (µCi –microCurie; total dose, 23–390 µCi).  No acute toxicities were seen.  Dose limiting toxicity (DLT) was suppression of the entire bone marrow lasting over 35 days and consequent death due to sepsis.  It occurred in one patient treated with 3 µCi/kg and in both patients receiving 4 µCi/kg.  Toxicities outside of the target organ (bone marrow) were limited to transient grade 2/3 liver function abnormalities.  With follow-up from 1–24 months (median, 2 months), no evidence of damage to kidneys due to radiation was seen.  Peripheral blood blasts (leukemia cells) were eliminated in 10 of 16 evaluable patients who received a full treatment dose.  Bone marrow blast reductions of over 33% were seen in 10 of 15 evaluable patients at 4 weeks, including 3 patients with 5 percent or fewer blasts.  Actimab-A is tolerable at doses less than 4 µCi/kg and has antileukemic activity.

Acute Myeloid Leukemia is characterized by very high numbers of immature cancerous white blood cells of certain kind that are similar to normal young blood cells and all immature white blood cells are called blasts.  It is not normal for a person to have any blasts circulating in peripheral blood (peripheral blasts) and to have more than 5 percent of blasts in the bone marrow.

Phase I/II AML Trial with two consecutive fractionated doses of Actimab-A

After receiving clearance from the FDA the Company started Phase I/II multi-center AML trial with fractionated doses of Actimab-A.  ATNM has concluded contracts with and provided training to 6 participating trial centers (Baylor University Medical Center, MSKCC, Johns Hopkins Medicine, University of Pennsylvania Health System, Fred Hutchinson Cancer Center and University of MD Andersen Cancer Center).  The Phase I (dose escalating) portion of the trial is ongoing. The Company estimates that it will take approximately 3-6 months to complete the Phase I portion of the trial and an additional 1- 1.5 years to complete the Phase II portion of the trial.  For the proposed Phase I/II study, patients are eligible if they have previously untreated newly diagnosed acute myeloid leukemia according to World Health Organization criteria, are age 60 years or older, and are unfit for or decline intensive chemotherapy, or are 70 years or older with newly diagnosed AML.  This target population has had better outcomes than relapsed and refractory patients who have been most of the patients in ATNM’s previous trials.

Maximum enrollment in the Phase I portion of the trial is 21 patients in dose escalating cohorts of 3 patients each with the goal of determining the maximum tolerated dose (MTD) for Actimab-A.  There is a six week interval between dose levels.  Once MTD has been determined, it will be used as the dose level for the Phase II portion of the trial which will enroll up to 53 patients.  There are 4 planned dose levels in the Phase I portion of the trial.




Iomab-B for Hematopoietic Stem Cells Transplantation:

Iomab-B (BC8-I-131 construct) has already been successfully used as a myeloconditioning/myeloablative agent in over 250 patients with incurable blood cancers. In both Phase I and Phase II trials Iomab-B has led to effective cures in patients with no options left. The only potentially curative treatment option for those patients is bone marrow transplantation (BMT), also known as a hematopoietic stem cell transplant (HSCT), but vast majority of patients over the age of 50 are either ineligible for myeloablative conditioning due to concomitant conditions or have a high burden and/or very resistant disease that makes reduced dose conditioning futile.

BC8-I-131 has demonstrated ability to successfully prepare such patients for bone marrow transplants when no other treatment was indicated. ATNM intends to develop Iomab-B through a regulatory approval via a pivotal registration trial in AML refractory/relapsing patients. That would allow for a relatively quick path to the market and provide a potentially curative treatment to patients who currently have little or no chance of achieving even a temporary remission, let alone a cure.

The targeting part of the Iomab-B construct is a monoclonal antibody that targets CD45, an antigen widely expressed on hematopoietic cells but not other tissues. Due to this broad expression, Iomab-B has demonstrated utility in other groups of patients and other indications as well, including Myelodysplastic Syndrome, Acute Lymphoblastic Leukemia, Hodgkin’s Disease and Non-Hodgkin Lymphoma. These are follow-on indications which could be pursued simultaneously or delayed, for cash conservation, and financed from commercial revenues.

The company is already preparing a program for replacing iodine 131 with Actinium 225 to create a second generation drug that would enable a significant expansion of use, described below as Actimab-B, Iomab-B was invented by researchers at the Fred Hutchinson Cancer Research Center (FHCRC), ATNM’s key collaborator on this program from whom ATNM obtained rights for all the commercial uses. FHCRC played a pivotal role in developing the entire field of bone marrow transplantation and the lead Hutchinson researcher, Dr. E. Donnall Thomas received the 1990 Nobel Prize in physiology/medicine for work in this area.



  • The $1.3 billion Bone Marrow Transplant (BMT) market in the U.S. is largely unaddressed by novel pharmaceutical drug companies
    BMT is the fastest growing hospital procedure in the US
    • ~20,000 of the ~60,000 BMTs in 2010 were performed in the U.S.

    Sustained growth in patients treated over 55 years old
    • 8% in 2000 to 21% in 2005 and 27% in 2007


Management Team

Kaushik J. Dave, Ph.D., M.B.A.
President & CEO

Dragan Cicic, M.D., M.B.A.


Dennis Earle, M.S., M.B.A., P.M.P.

Senior Vice President of Clinical Operations

David Gould, M.D.

Senior Vice President of Finance and Corporate Development

Corey Sohmer, M.B.A.

Vice President of Finance and Business Development


Actinium Pharmaceuticals, Inc.
501 Fifth Ave.
New York, NY 10017

3645 Marketplace Blvd.
Suite 130-280
Atlanta, GA 30344
Phone: (404) 941-8975



SEC Filings


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#1638   Loading zone Shark Season 05/20/19 08:23:33 AM
#1637   Blast reduction of 98% and 100%, this should microcapbiotech 05/18/19 09:09:07 PM
#1636   ATNM is my ATM Sebastian1 05/17/19 11:45:13 PM
#1635   Peron, This stock is STILL CRAZY CHEAP at microcapbiotech 05/16/19 02:55:52 PM
#1634   Massively undervalued imho. Peron 05/16/19 10:08:01 AM
#1633   NEWS -- Abstract Highlighting New Data from the Paulness 05/16/19 09:41:29 AM
#1632   Abstract Highlighting New Data from the Iomab-B Pivotal Peron 05/16/19 09:10:13 AM
#1631   I guess Iomab will be a success. Peron 05/16/19 09:08:27 AM
#1630   CRAZY CHEAP RIGHT NOW microcapbiotech 05/10/19 03:11:39 PM
#1629   NEWS -- Actinium Announces Appointment of Niva Almaula, Paulness 05/07/19 09:11:47 AM
#1628   ????????? But I'm not giving up. microcapbiotech 05/03/19 10:38:03 PM
#1627   Bought 25000 at .276 - hoping for a Advisory 04/27/19 10:19:55 AM
#1626   I'm not adding more by now. I'm invested ADVFN_blukky 04/26/19 10:48:15 AM
#1625   Time for rebound is overdue. Peron 04/26/19 09:39:36 AM
#1624   That was my inclination as well. Nothing Windbag1014 04/24/19 09:33:10 AM
#1623   Buying more Shark Season 04/24/19 09:31:44 AM
#1622   Dumping or buying more? Windbag1014 04/23/19 10:06:15 AM
#1621   * * $ATNM Video Chart 04-18-2019 * * ClayTrader 04/18/19 05:22:13 PM
#1620   I meant "which is below last closing price". Peron 04/18/19 10:10:15 AM
#1619   Seems that the market does not like an Peron 04/18/19 10:09:43 AM
#1618   NEWS -- Actinium Pharmaceuticals, Inc. Announces Pricing of Paulness 04/18/19 09:27:53 AM
#1617   NEWS -- Actinium Pharmaceuticals, Inc. Announces Proposed Public Paulness 04/17/19 04:26:15 PM
#1616   NEWS -- Actinium's Leading Clinical, Preclinical, Production and Paulness 04/08/19 08:40:32 AM
#1615   NEWS -- Actinium Highlights Actimab-A and Venetoclax Synergies Paulness 04/03/19 09:54:12 AM
#1614   Looking Good Golden_Cross 04/03/19 09:21:11 AM
#1613   NEWS - Actinium Highlights Actimab-A and Venetoclax Synergies Peron 04/03/19 08:20:36 AM
#1612   ATNM Daily Chart: Golden_Cross 04/02/19 04:03:16 AM
#1611   * * $ATNM Video Chart 04-01-2019 * * ClayTrader 04/01/19 05:11:28 PM
#1610   What Makes Actinium (ATNM) a New Buy Stock Windbag1014 04/01/19 03:53:41 PM
#1609   News: $ATNM Actinium Successfully Completes Second Module of whytestocks 03/29/19 04:00:38 PM
#1608   NEWS -- Actinium Successfully Completes Second Module of Paulness 03/29/19 09:30:26 AM
#1607   NEWS -- Actinium Highlights its Participation at the Paulness 03/26/19 08:30:06 AM
#1606   NEWS -- Actinium Announces Update Including IP and Paulness 03/20/19 11:17:55 AM
#1605   NEWS -- Actinium Reports Fourth Quarter and Year-End Paulness 03/19/19 08:20:39 PM
#1604   NEWS -- Actinium Appoints Accomplished FDA and Industry Paulness 03/19/19 05:47:31 PM
#1603   NEWS -- Actinium Provides Comprehensive Patent Portfolio Update Paulness 03/15/19 11:25:46 PM
#1602   NEWS -- Actinium Pharmaceuticals to Present at the Paulness 03/15/19 09:11:46 AM
#1601   https://opco2.bluematrix.com/docs/pdf/e040c2b7-7a18-4fc2-a072-8e07b27497ab.pdf? Windbag1014 03/06/19 03:10:23 PM
#1600   calm before the storm blukky 03/06/19 02:39:40 PM
#1599   absolute silence on this board blukky 03/06/19 02:39:12 PM
#1598   NEWS -- Actinium's Late Breaking Oral Presentation at Paulness 02/25/19 09:04:07 AM
#1597   NEWS -- Actinium Highlights New Data at TCT Paulness 02/21/19 09:55:40 AM
#1596   * * $ATNM Video Chart 02-20-2019 * * ClayTrader 02/20/19 05:41:57 PM
#1595   NEWS -- Iomab-B One of Four Late Breaking Paulness 02/13/19 09:27:09 AM
#1594   NEWS -- Actinium Initiates Second Dosing Cohort of Paulness 02/12/19 08:31:45 AM
#1593   NEWS -- Actinium Provides Patent Portfolio Update for Paulness 02/06/19 08:50:34 AM
#1592   NEWS -- Actinium Initiates Novel Phase 1/2 Combination Paulness 02/05/19 08:10:32 AM
#1591   So, what are the prospects here? noretreat 02/04/19 09:53:51 AM
#1590   NEWS -- Actinium Initiates Second Dosing Cohort of Paulness 02/04/19 08:59:50 AM
#1589   NEWS -- Actinium Pharmaceuticals to Host Key Opinion Paulness 01/29/19 09:17:42 AM