SIGA Technologies — Another strong period for the order book

SIGA Technologies (NASDAQ: SIGA)

Last close As at 12/05/2025

USD5.94

0.28 (4.95%)

Market capitalisation

USD425m

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Research: Healthcare

SIGA Technologies — Another strong period for the order book

Q125 marked another active period for SIGA’s order book, with BARDA exercising the final $26m intravenous (IV) TPOXX option in March, expected to be delivered in 2026, consistent with our estimates. Product revenues were $5.8m, driven by international TPOXX deliveries, which we believe may be related to the outstanding $6.7m contract with the Canada Department of National Defence (CDND). Importantly, sales momentum continued into Q2, with $62m in oral and IV TPOXX deliveries in April, substantially servicing the $94m order book at end-Q125. Liquidity remains strong, with net cash of $162.3m at end-Q125 enabling a $0.6/share dividend announcement in April (an attractive payout ratio of 72% and yield of 10.6%). We make modest revisions to our estimates, with our valuation upgrading slightly to $14.78/share with the model roll-forward ($14.41/share previously).

Jyoti Prakash

Written by

Jyoti Prakash, CFA

Director, healthcare

Healthcare

Q125 results update

13 May 2025

Price $5.66
Market cap $389m

Net cash/(debt) as of 31 March 2025

$162.3m

Shares in issue

71.4m
Code SIGA
Primary exchange NASDAQ
Secondary exchange N/A
Price Performance
% 1m 3m 12m
Abs 1.5 (1.0) (19.9)
52-week high/low $11.6 $4.5

Business description

SIGA Technologies is a commercial-stage health security company focused on the treatment of smallpox and other orthopoxviruses. It has contracts with both the US and Canadian governments for TPOXX, its treatment for smallpox, and is expanding internationally.

Next events

Q225 results

August 2025

BARDA IV TPOXX deliveries

Q325

Analysts

Jyoti Prakash, CFA
+44 (0)20 3077 5700
Arron Aatkar, PhD
+44 (0)20 3077 5700

SIGA Technologies is a research client of Edison Investment Research Limited

Note: *EBITDA, PBT and EPS (basic) are normalized, excluding amortization of acquired intangibles, exceptional items and share-based payments.

Year end Revenue ($m) EBITDA ($m) PBT ($m) EPS ($) DPS ($) P/E (x) Yield (%)
12/23 139.9 84.2 87.8 0.95 0.45 5.9 8.0
12/24 138.7 70.5 76.1 0.83 0.60 6.8 10.6
12/25e 121.6 55.3 61.0 0.66 0.60 8.5 10.6
12/26e 237.4 150.3 156.4 1.70 0.60 3.3 10.6

International sales momentum continues into 2025

Following the $5.8m recorded in product sales in Q125, management expects the international uptake curve to steepen in the coming months, although it is unclear for now if that relates to further deliveries to the CDND or other markets. With $53m and $9m in oral and IV TPOXX deliveries in April respectively (from the $70m order book at end-FY24), Q2 should be another strong period for sales performance. We believe these deliveries, combined with BARDA’s exercise of the last $26m IV TPOXX option and additional $14m in funding, are supportive of the US government’s commitment to national security and SIGA’s request for proposal (RFP) efforts, for which we expect regular updates.

Healthy balance sheet supports another dividend

Deliveries to the US strategic national stockpile (SNS) and strong international sales over the past year have allowed SIGA to strengthen its balance sheet. Q125 net cash balance stood at a healthy $162.3m, supporting the declaration of a $0.60/share dividend (totaling $43m), marking the fourth consecutive annual payout, with disbursement scheduled for May 15. The company exited the quarter with a $94m order backlog – of which $62m was fulfilled in April – providing strong near-term revenue visibility. We believe SIGA is well capitalized into the foreseeable future, past upcoming RFP discussions.

Valuation: Slight upgrade to $14.78 per share

We have adjusted our estimates for the dividend announcement and Q125 performance, rolled forward our model and incorporated the latest net cash figure. Our valuation adjusts slightly to $1.06bn or $14.78/share (from $1.03bn or $14.41/share previously).

Sales momentum continues into Q125

The key takeaways from the Q125 results, in our view, are the strengthened order book for TPOXX as well as the sustained momentum in international sales, a key focus area for SIGA. Notably, in March 2025, the Biomedical Advanced Research and Development Authority (BARDA) exercised its last outstanding option for IV TPOXX, worth $26m, which the company expects to deliver in 2026. SIGA recorded total revenues of $7.0m in Q125, including $5.8m related to oral TPOXX sales to an undisclosed international jurisdiction, which we believe may have been the CDND. In April 2020, SIGA was awarded a contract by the CDND for delivery of $14m worth of oral TPOXX. As of 31 December 2024, $6.7m of this remained outstanding, and we believe the product revenues recognized in Q125 are likely related to these deliveries. Management has indicated that it expects substantial sales over the next few months although it is unclear for now if these refer to additional deliveries to the CDND, or other international jurisdictions or overall sales. In comparison, SIGA has booked $23.9m in product revenues in Q124, comprising $14.7m in oral TPOXX stockpile deliveries to the BARDA, $1.1m to the US Department of Defense, $7m of orders to seven European countries under the Health Emergency Preparedness and Response (HERA) deal and a further $0.7m to the CDND. Note that the nature of SIGA’s business model (driven by government orders and deliveries) makes period-on-period evaluations challenging and not strictly comparable. This was evidenced by the sales momentum picking up in Q225, with the delivery of $62m of TPOXX to the US SNS in April (including $53m of oral and $9m of IV TPOXX), substantially fulfilling the $70m order book outstanding at end-FY24. The company expects to deliver the remaining $8m of IV TPOXX by the end of Q325.

SIGA also recorded another $1.2m in revenues from R&D activities under the 19C BARDA contract ($1.6m in Q124) with the decline attributed to a decrease in billable activities under the contract. Encouragingly, the company noted that in April, the existing 19C contract with BARDA was modified to include an additional $14m in funding over the next two to three years to support manufacturing activities related to IV TPOXX. Management expects the funding to aid the company in completing the technology transfer for IV TPOXX manufacturing to a new third-party contract manufacturer. SIGA currently has agreements with the following contract manufacturing organizations for IV TPOXX: Roquette America, Patheon Manufacturing Services and PCI.

Gross margins for the period were 97.3%, materially higher than the historical c 85% for oral TPOXX. We understand that this difference was due to the recovery for inventory, which was previously written off and is therefore one-off in nature. As such, we expect the margins to normalize in the coming quarters. R&D expenses increased by 13.4% y-oy to $3.5m, with the increase attributed to higher compensation and consulting-related expenses as well as investments in IT enhancements. SG&A expenses declined to $5.7m (down 27.9% from $7.9m in Q124), driven by lower promotional fees paid to Meridian in Q125 following the amended agreement (zero vs $1.5m in Q124) as well as lower compensation expense (the Q124 figure included one-time payments and equity grants to new hires). Overall, SIGA recorded an operating and net loss of $2.3m and $0.4m respectively in Q125, versus an operating and net profit of $11.3m and $10.3m in Q124.

Despite registering an operating loss in the quarter, the company reported an operating cash inflow of $7.1m in Q125, driven by an improved working capital position (primarily lower accounts receivables following the receipt of c $20m for oral TPOXX sales from the US government and international orders in the quarter). This supported the cash position growing to $162.3m at end-Q125 ($155.4m at end-FY24). These cash reserves will be partially utilized to pay c $43m in dividends in May 2025 ($0.6/share; a payout ratio of 72% of the FY24 net income). Note that this payment marks the fourth consecutive year of dividend payout by the company ($0.6/share in 2024 and $0.45/share in 2023 and 2022, respectively), which is reflective of a strong business model and is particularly encouraging given the uncertain macroeconomic environment.

Estimates revision

Given that our forecast model already reflected deliveries to the CDND in 2025 and the $26m IV TPOXX option in 2026, and pending further clarity on future international sales, our product revenue estimates for FY25 and FY26 are unchanged at $116.0m and $231.3m, respectively. For further granularity on our revenue estimates, please see our March update note. We also maintain our operating expense estimates and continue to project an operating profit of $54.8m and $149.8m in FY25 and FY26, respectively.

US government RFP a key priority for 2025

With the conclusion of the 19C BARDA contract (awarded in 2018), the immediate focus for SIGA is on the upcoming RFP from the US government for a potentially longer-term, recurring contract for the SNS. While we note that the recent funding cuts to the National Institutes of Health and policy announcements by the Trump administration may have generated some uncertainty around the RFP, we reiterate that deliveries to the SNS are a matter of national security preparedness and should typically not be affected by broader cuts being implemented by the new government. Moreover, the recent exercise by BARDA of the remaining $26m IV TPOXX order, the $62m in TPOXX deliveries in April and the $14m in additional funding announced under the 19C contract are all indicative of the US government’s continued focus on preparedness against bioterrorism and a positive signal for SIGA’s antiviral therapy, TPOXX.

As noted in our last update, while we continue to see a high likelihood of SIGA securing a new contract in 2025, we have conservatively assumed that any deliveries under the new contract will take place only in 2026. We also assume the contract size to be similar to the 2018 19C contract. Note that this is subject to modification with further clarity on the new contract terms.

PEP and pediatric optionalities still in play

The post-exposure prophylactic (PEP) label expansion program is a key future growth pillar for SIGA, offering twice the market opportunity for the company given the expected 28-day course versus 14 days for the treatment indication. While the company has completed all clinical trial-related activities (the expanded safety study did not indicate any drug-related serious adverse events), samples from the immunogenicity trial (testing TPOXX plus JYNNEOS, an FDA-approved smallpox vaccine) are being retested by the Centers for Disease Control and Prevention (CDC) after the trial indicated that the measurable immune response to the JYNNEOS vaccine in both groups was lower than expected. During the Q125 earnings call, management communicated that the CDC is in the process of finalizing its approach, with sample reanalysis now expected to be completed in Q425 (mid-2025 previously) and a supplementary new drug application expected to be filed in H126 (early 2026 previously). We note the slight delay from the previously communicated timelines but continue to model a 2026 launch (with a 50% success probability). We will revisit our assumptions with further clarity on timelines by management.

The company also provided an update on its pediatric program for TPOXX, where it is developing an oral liquid suspension formulation for pediatric patients weighing less than 13kg. SIGA has communicated that the manufacturing of the clinical trial material for the pediatric study has been completed, with plans to submit an investigational new drug application in H225. We currently model a 2027 launch under the pediatric label, with a 50% success probability.

Valuation

We roll forward our model for the Q125 results but keep our near-term estimates and long-term assumptions for each of SIGA’s ongoing programs unchanged for now. We also incorporate the latest net cash figure ($162.3m vs $155.4m at end-FY24) in our calculations. Our overall valuation adjusts slightly to $1.06bn or $14.78/share ($1.03bn or $14.41/share previously).

Exhibit 1 presents a breakdown of our valuation.

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