# EDGAR Filing Document

**Accession Number:** 0001833214
**File Stem:** 0000950170-23-000472
**Filing Date:** 2023-1
**Character Count:** 30058
**Document Hash:** 5a191763beafcc4518d227a23a78eb03
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000950170-23-000472.hdr.sgml**: 20230109

**ACCESSION NUMBER**: 0000950170-23-000472

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 38

**CONFORMED PERIOD OF REPORT**: 20230109

**ITEM INFORMATION**: Regulation FD Disclosure

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20230109

**DATE AS OF CHANGE**: 20230109

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SAB Biotherapeutics, Inc.
- **CENTRAL INDEX KEY:** 0001833214
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **IRS NUMBER:** 853899721
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39871
- **FILM NUMBER:** 23516835

**BUSINESS ADDRESS:**
- **STREET 1:** 2100 EAST 54TH STREET NORTH
- **CITY:** SIOUX FALLS
- **STATE:** SD
- **ZIP:** 57104
- **BUSINESS PHONE:** 605-679-6980

**MAIL ADDRESS:**
- **STREET 1:** 2100 EAST 54TH STREET NORTH
- **CITY:** SIOUX FALLS
- **STATE:** SD
- **ZIP:** 57104

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Big Cypress Acquisition Corp.
- **DATE OF NAME CHANGE:** 20201120

?xml version="1.0" encoding="ASCII"? 8-K

**UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549**

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**FORM** 8-K

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**CURRENT REPORT**

**Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934**

**Date of Report (Date of earliest event reported):** January 09, 2023<br>

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SAB BIOTHERAPEUTICS, INC.

**(Exact name of Registrant as Specified in Its Charter)**

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| | | |
|:---|:---|:---|
| Delaware | 001-39871 | 85-3899721 |
| **(State or Other Jurisdiction<br>of Incorporation)** | **(Commission File Number)** | **(IRS Employer<br>Identification No.)** |
| 2100 East 54th Street North |  |  |
| Sioux Falls**,** South Dakota |  | 57104 |
| **(Address of Principal Executive Offices)** |  | **(Zip Code)** |

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**Registrant's Telephone Number, Including Area Code:** 605 679-6980<br>

**(Former Name or Former Address, if Changed Since Last Report)**

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Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

**Securities registered pursuant to Section 12(b) of the Act:**

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| | | |
|:---|:---|:---|
| **<br>Title of each class** | **Trading<br>Symbol(s)** | **<br>Name of each exchange on which registered** |
| Common stock, $0.0001 par value per share | SABS | The NASDAQ Stock Market LLC |
| Warrants, each exercisable for one share of Common Stock at an exercise price of $11.50 per share | SABSW | The NASDAQ Stock Market LLC |

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Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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**Item 7.01 Regulation FD Disclosure.**

On January 9, 2023, SAB Biotherapeutics, Inc. (the "Company" or "SAB") issued a press release announcing that the Company will present an overview of the its DiversitAb™ platform and data from completed trials (the "Presentation) on January 10, 2023 at the Biotech Showcase held in San Francisco. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and is hereby incorporated by reference herein.

The Presentation will highlight the latest innovations and treatment pathways in immunology, including an overview of the Company's novel DiversitAb™ platform, and data from completed clinical trials that indicate the Company's polyclonal antibody therapies can provide long-lasting efficacy against numerous highly mutating pathogens or multiple targets or pathways at once. A copy of the Presentation is furnished herewith as Exhibit 99.2 and is incorporated herein by reference. Additionally, the Company will make an audio recording of the Presentation available on the Company's investor relations website prior to the Biotech Showcase Presentation at https://ir.sab.bio/.

The foregoing (including Exhibits 99.1 and 99.2) are being furnished pursuant to Item 7.01 of Form 8-K and will not be deemed to be filed for purposes of Section 18 of the Securities and Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise be subject to the liabilities of that section, nor will it be deemed to be incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act. The information contained in each of the press release and the Presentation is summary information that should be considered in the context of the Company's filings with the Securities and Exchange Commission and other public announcements the Company may make by press release or otherwise from time to time.

Cautionary Note Regarding Forward-Looking Statements

Certain statements made herein that are not historical facts are forward-looking statements for purposes of the safe harbor provisions under The Private Securities Litigation Reform Act of 1995. Forward-looking statements generally are accompanied by words such as "believe," "may," "will," "estimate," "continue," "anticipate," "intend," "expect," "should," "would," "plan," "predict," "potential," "seem," "seek," "future," "outlook" and similar expressions that predict or indicate future events or trends or that are not statements of historical matters. These forward-looking statements include, but are not limited to, statements regarding future events, including the development and efficacy of our influenza program, C. diff. program, Type 1 Diabetes program, and other discovery programs, the likelihood that a patent will issue from any patent application, the results, including timing, of the development of SAB-176, SAB-185 and SAB-195 (including any IND filing or proposed clinical trials), financial projections and future financial and operating results (including estimated cost savings and cash runway), the outcome of and potential future government and other third-party collaborations or funded programs (including negotiations with the DoD).

These statements are based on the current expectations of SAB and are not predictions of actual performance, and are not intended to serve as, and must not be relied on, by any investor as a guarantee, prediction, definitive statement, or an assurance, of fact or probability. These statements are only current predictions or expectations, and are subject to known and unknown risks, uncertainties and other factors which may be beyond our control. Actual events and circumstances are difficult or impossible to predict, and these risks and uncertainties may cause our or our industry's results, performance, or achievements to be materially different from those anticipated by these forward-looking statements. A further description of risks and uncertainties can be found in the sections captioned "Risk Factors" in our most recent annual report on Form 10-K, subsequent quarterly reports on Form 10-Q, and other filings with or submissions to, the U.S. Securities and Exchange Commission, which are available at https://www.sec.gov/. Except as otherwise required by law, SAB disclaims any intention or obligation to update or revise any forward-looking statements, which speak only as of the date they were made, whether as a result of new information, future events, or circumstances or otherwise.

**Item 9.01 Financial Statements and Exhibits.**

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| | |
|:---|:---|
| **Exhibit Number** | **Description** |
| 99.1 | [<u>Press Release of the Company, dated January 9, 2023</u>](sabs-ex99_1.htm) |
| 99.2 | [<u>Presentation dated January 10, 2023</u>](sabs-ex99_2.htm) |
| 104 | Cover Page Interactive Data File-the cover page XBRL tags are embedded within the Inline XBRL document. |

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**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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| | | | |
|:---|:---|:---|:---|
|  |  |  | SAB Biotherapeutics, Inc. |
| Date: | January 9, 2023 | By:  | /s/ Eddie J. Sullivan |
|  |  |  | Eddie J. Sullivan<br>Chief Executive Officer |

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## Exhibit 99.1

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|:---|:---|
| ![img1871078_0.jpg](img1871078_0.jpg)  | **EXHIBIT 99.1** |

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**SAB Biotherapeutics' CMO Alexandra Kropotova to Deliver Presentation on Next Generation Biologics in Immunology at Biotech Showcase**

SIOUX FALLS, S.D., January 9, 2023 (GLOBE NEWSWIRE) – SAB Biotherapeutics (Nasdaq: SABS), a clinical-stage biopharmaceutical company with a novel immunotherapy platform that produces specifically targeted, high-potency, high-avidity, fully-human polyclonal antibodies without the need for human donors, announced today that Alexandra Kropotova, MD, Executive Vice President and Chief Medical Officer, will deliver a presentation at the Biotech Showcase in San Francisco on Tuesday, Jan. 10 at 2:30 p.m. PST

Dr. Kropotova's presentation, titled: **Next Generation Biologics in Immunology: Solution for Complex Diseases**, will discuss the latest innovations and treatment pathways in immunology, including an overview of SAB's novel DiversitAb™ platform. DiversitAb™ is the only platform in the world that produces fully-human, broadly neutralizing, polyclonal antibodies utilizing transchromosomic cows. Dr. Kropotova will also present data from completed clinical trials that indicate SAB's polyclonal antibody therapies can provide long-lasting efficacy against numerous highly mutating pathogens or multiple targets or pathways at once.

"SAB's approach is to develop treatments designed to address multiple dysregulated pathways, multiple disease targets, and multiple epitopes in one powerful treatment," said Dr. Kropotova. "SAB's groundbreaking DiversitAb™ therapeutic platform and its promising pipeline developments in influenza, Clostridioides difficile, type 1 diabetes and other complex disease states with high unmet patient need is setting a promising new standard for immunology."

During the Biotech Showcase, potential partners, collaborators, and investors who are registered and attending the conference may request one-on-one appointments with the Company through the Biotech Showcase partnering platform: https://informaconnect.com/biotech-showcase/

To schedule an in-person or virtual meeting during J.P. Morgan week, regardless of attendance or registration, please contact: SABIR@westwick.com

To learn more about partnering opportunities with SAB Biotherapeutics, visit: https://www.sab.bio/partnering-opportunities/

**About SAB Biotherapeutics, Inc**

SAB Biotherapeutics, Inc. (SAB) is a clinical-stage biopharmaceutical company focused on the development of powerful and proprietary immunotherapeutic polyclonal human antibodies to treat and prevent infectious diseases and immune and autoimmune disorders. Our development programs include infectious diseases resulting from outbreaks and pandemics, as well as immunological, gastroenterological, and respiratory diseases that have significant mortality and health impacts on immune compromised patients. SAB has applied advanced genetic engineering and antibody science to develop Transchromosomic (Tc) Bovine™. Our versatile DiversitAb™ platform is applicable to a wide range of serious unmet needs in human diseases. It produces natural, specifically targeted, high-potency, fully-human polyclonal immunotherapies without the need for human donors. SAB currently has multiple drug development programs underway and collaborations with the US government and global pharmaceutical companies. For more information on SAB, visit: https://www.SAb.bio and follow SAB on Twitter and LinkedIn.

**Forward-Looking Statements**

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Certain statements made herein that are not historical facts are forward-looking statements for purposes of the safe harbor provisions under The Private Securities Litigation Reform Act of 1995. Forward-looking statements generally are accompanied by words such as "believe," "may," "will," "estimate," "continue," "anticipate," "intend," "expect," "should," "would," "plan," "predict," "potential," "seem," "seek," "future," "outlook" and similar expressions that predict or indicate future events or trends or that are not statements of historical matters. These forward-looking statements include, but are not limited to, statements regarding future events, including the development and efficacy of our influenza program, C. diff. program, Type 1 Diabetes program, and other discovery programs, the likelihood that a patent will issue from any patent application, the results, including timing, of the development of SAB-176, SAB-185 and SAB-195 (including any IND filing or proposed clinical trials), financial projections and future financial and operating results (including estimated cost savings and cash runway), the outcome of and potential future government and other third-party collaborations or funded programs (including negotiations with the DoD).

These statements are based on the current expectations of SAB and are not predictions of actual performance, and are not intended to serve as, and must not be relied on, by any investor as a guarantee, prediction, definitive statement, or an assurance, of fact or probability. These statements are only current predictions or expectations, and are subject to known and unknown risks, uncertainties and other factors which may be beyond our control. Actual events and circumstances are difficult or impossible to predict, and these risks and uncertainties may cause our or our industry's results, performance, or achievements to be materially different from those anticipated by these forward-looking statements. A further description of risks and uncertainties can be found in the sections captioned "Risk Factors" in our most recent annual report on Form 10-K, subsequent quarterly reports on Form 10-Q, and other filings with or submissions to, the U.S. Securities and Exchange Commission, which are available at https://www.sec.gov/. Except as otherwise required by law, SAB disclaims any intention or obligation to update or revise any forward-looking statements, which speak only as of the date they were made, whether as a result of new information, future events, or circumstances or otherwise.

**CONTACTS:**

**Investor Relations:**<br><u>SABIR@westwicke.com</u>

**Media Relations:**<br><u>SABPR@westwicke.com</u>

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## Exhibit 99.2

![Slide 1](sabs-ex99_2s1.jpg)

Next Generation Biologics in ImmunologySolution for Complex Diseases Biotech Showcase Conference  January 2023 Alexandra Kropotova, MD Executive Vice President & Chief Medical Officer Exhibit 99.2

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![Slide 2](sabs-ex99_2s2.jpg)

Forward-Looking Statements 2 The material in this presentation has been prepared by SAB Biotherapeutics, Inc. ("SAB") and is general background information about SAB's activities current as of the date of this presentation. This information is given in summary form and is not intended to be complete. Information in this presentation, including financial forecasts, should not be considered advice or a recommendation to investors or potential investors in relation to holding, purchasing, or selling securities or other financial products or instruments and does not take into account any particular investment objectives, financial situation or needs. This presentation may contain forward-looking statements including statements regarding our intent, belief, or current expectations with respect to SAB's businesses and operations, market conditions, results of operations and financial condition, capital adequacy, specific provisions, and risk management practices. Readers are cautioned not to place undue reliance on these forward-looking statements. SAB does not undertake any obligation to update any information herein for any reason or to publicly release the result of any revisions to these forward-looking statements to reflect events or circumstances after the date hereof to reflect the occurrence of unanticipated events unless required by law. While due care has been used in the preparation of forecast information, actual results may vary in a materially positive or negative manner and the presentation may contain errors or omissions. Forecasts and hypothetical examples are subject to uncertainty and contingencies outside SAB's control. Past performance is not a reliable indication of future performance. The forward-looking statements contained or implied in this presentation are subject to other risks and uncertainties, including those discussed under the heading "Risk Factors" in SAB's most recent Annual Report on Form 10-K with the Securities and Exchange Commission (the "SEC") and in other filings that SAB makes with the SEC. Unless otherwise specified, information is current at the date hereof. The SAB logo and other trademarks of SAB appearing in this presentation are the property of SAB. All other trademarks, services marks, and trade names in this presentation are the property of their respective owners.© 2023 SAB BIOTHERAPEUTICS, INC.

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![Slide 3](sabs-ex99_2s3.jpg)

SAB Biotherapeutics Fact Sheet 2 11 90 700 0 1 Years or less from concept to IND filing Anti-infective assets with proven efficacy in Discovery or Development stages Percent success rate from concept to IND and beyond Subjects treated with SAB therapeutics in clinical trials across DIVERSITAB platform Assets to date that lost efficacy to escape mutants Only company to produce unlimited supply of fully-human broadly neutralizing pAbs without need for human donors© 2023 SAB BIOTHERAPEUTICS, INC.

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![Slide 4](sabs-ex99_2s4.jpg)

Demonstrated as a Novel Discovery Platform for Human Monoclonal and Polyclonal Antibodies Antigen Titer/Potency Monitoring Hyper Immunization with Antigen Patented animals produce human antibodies Targeted Human Antibody Production Downstream Processes: Antigen specific Fluorescence Activated Cell Sorting (FACS) Single B cell clone Proteome/Transcriptome Hybridoma generation Molecular Cloning Generation of recombinant human monoclonal /oligoclonal antibodies PBMC or Lymph Tissue Collection Plasma Collection Quick Proof-of-Concept Test Efficacy Tests: In vitro In vivo B cell Isolation Plasma-derived human polyclonal antibodies Avidity matured PBMCs available for screening in 5-9 weeks© 2023 SAB BIOTHERAPEUTICS, INC. PBMC: Peripheral Blood Mononuclear Cells VDJ: Variable, Diversity and Joining Human Artificial Chromosome (HAC): ~17Mb contains the entire unarranged VDJ human immunoglobulin loci (IgH + IgK)

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![Slide 5](sabs-ex99_2s5.jpg)

5 Significant Gains in R&D Efficiency with SAB hpAb Discovery & CMC Production Antigen Design & Development SAB hpAb therapeutics: Simultaneous "discovery" and CMC production in Tc Bovine Traditional mAbs therapeutics: Sequential discovery and CMC production process Discovery & Production Purification Tc hpAbs Discovery to IND filing: 1-2 years Preclin Pharm & Tox IND filing Traditional mAbs Discovery to IND filing: 4-6 years Target ID & Discovery Production Purification Preclin Pharm & Tox IND filing CDER CBER© 2023 SAB BIOTHERAPEUTICS, INC.

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![Slide 6](sabs-ex99_2s6.jpg)

Fully-Human, Diverse Repertoire, & Functional Antibodies VDJ repertoire usage mimics human-derived diversity in variable region Rich Antibody Diversity Highly-Functional Fc Region Matches full activation of effector cells and functional glycosylation / post translational modification© 2023 SAB BIOTHERAPEUTICS, INC. TC BOVINE™ HUMAN CONTROLS HUMAN LUPUS

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![Slide 7](sabs-ex99_2s7.jpg)

Key Product Differentiators vs Monoclonal Antibodies: Multi-target capability in a single therapeutic Natural multi-epitope targeted pAb selected and produced in vivo Ability to target multiple disease pathways at once increase potential for superior efficacy Specifically driven high-potency antibody titers and avidity Effective against escape mutants with reduced possibility for resistance Proven ability to target multiple human autoantibodies to treat autoimmune diseases More cost and time effective R&D development No current risk of biosimilar competition Natural mixture of many human antibodies that bind to multiple epitopes is regulated as a single product SAB Human Polyclonal Antibodies: Next Generation of Biologics 7 TARGET pathway 1 FDA: CENTER FOR BIOLOGICS EVALUATION & RESEARCH (CBER) TARGET pathways 2© 2023 SAB BIOTHERAPEUTICS, INC.

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![Slide 8](sabs-ex99_2s8.jpg)

Biologic Pipeline with Broad Polyclonal Therapeutic Reach© 2023 SAB BIOTHERAPEUTICS, INC.

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![Slide 9](sabs-ex99_2s9.jpg)

Clinical Development Programs: Asset Progress SAB-195 IND (CDI, targeting H2 2023-H1 2024) SAB-176 2023-2024 flu season Phase 2b FPI SAB-142 IND (T1D) SAB-142 Phase 1/POBA FPI SAB-195 Phase 1/POBA FPI SAB-195 Phase1/POBA topline SAB-176 2023-2024 flu season Phase 2b topline SAB-142 Phase 1/POBA ongoing SAB-195 Phase 2 topline SAB-176 Phase 3 FPI SAB-142 Phase 1/POBA topline SAB-195 Phase 3 FPI 2023 2024 2025 2026 FPI: First Patient In POBA: Proof of Biological Activity HV: Healthy Volunteers CDI: Clostridioides Difficile Infection T1D: Type 1 Diabetes© 2023 SAB BIOTHERAPEUTICS, INC.

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![Slide 10](sabs-ex99_2s10.jpg)

Value Proposition: SAB-176 First and only broadly neutralizing polyclonal biologic for prophylaxis and treatment of influenza in high-risk patients Adaptive and cross-reactive to multiple influenza strains Multiprong Mechanism of Action Neutralizing activity targeting multiple epitopes of Influenza A and B virus Antibody-Dependent Cellular Cytotoxicity (ADCC) Established Proof-of-Concept in the well-established validated influenza challenge model First-in-class fully-human polyclonal antibody treatment aimed to provide superior long-lasting efficacy for prophylaxis and management of influenza in patients at high-risk Key Differentiators© 2023 SAB BIOTHERAPEUTICS, INC.

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![Slide 11](sabs-ex99_2s11.jpg)

0% survival in 100mg/kg/d Oseltamivir-treated groups SAB-176 Protected Mice from Weight Loss While Oseltamivir Didn't Efficacy Against Mutational Drift: Oseltamivir Resistant (OR) H1N1pdm Virus Challenge Model 11 SAB-176 Showed 100% Protection at All Dose Levels From Mortality© 2023 SAB BIOTHERAPEUTICS, INC.

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![Slide 12](sabs-ex99_2s12.jpg)

Established Proof-of-Concept for SAB-176: Met Primary Endpoint of Viral Load Reduction in Phase 2a Challenge Study Mean Viral Load by Nasal Samples qRT-qPCR by Day Relative to Viral Challenge 12 Mean Total Symptom Score by Day Relative to Viral Challenge SAB-176 Achieved Statistically Significant (p = 0.013) Improvement in Symptoms at Day 4 SAB-176 not specifically targeted to pH1N1 strain used in challenge study Statistically significant reduction in virus load confirms high cross reactivity to pandemic strain (not targeted with immunogen) Reinforces ability to generate broadly neutralizing antibodies to viral variants SAB-176 Shortened Time of Viral Shedding as Measured by Lack of Culturable Virus Time to Resolution of Positive Viral Cultures Following First Positive Culture Starting 2 Days After Intranasal Viral Challenge Achieved Statistically Significant (p = 0.026) Reduction in Viral Load© 2023 SAB BIOTHERAPEUTICS, INC.

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![Slide 13](sabs-ex99_2s13.jpg)

Comprehensive approach to treating high-risk patients with influenza by broadly neutralizing fully-human pAb immunotherapeutic with several anti-viral mechanisms© 2022 SAB BIOTHERAPEUTICS, INC. Only SAB-176 Provides Potential for "EVERGREEN" Biologic with Low Risk of Escape Mutants© 2023 SAB BIOTHERAPEUTICS, INC.

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![Slide 14](sabs-ex99_2s14.jpg)

Value Proposition: SAB-195 First-in-class fully human polyclonal antibody treatment targeting C Diff spores, bacteria, and toxins Only treatment with dual mode of action: Unlike bezlotoxumab, SAB-195 targets surface antigens on C. diff bacteria and spores Unlike antibiotics, SAB-195 targets several C. diff toxins responsible for severity of the disease SAB-195 is a target-specific treatment targeting only C. diff bacteria/spores/toxins while fully preserving good microbiome Preclinical data supports potential for competitive efficacy as first-line polyclonal therapy for severe CDI in patients who are at high risk for CDI recurrences First-in-class fully-human polyclonal antibody treatment with dual mechanism of action designed to treat severe CDI and reduce CDI recurrence in high-risk patients Key Differentiators© 2023 SAB BIOTHERAPEUTICS, INC.

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![Slide 15](sabs-ex99_2s15.jpg)

SAB-195 Preclinical Data Tc bovine Immunized with Antigen Fusion Proteins Constructed from Receptor Binding Domain of C. diff Toxin A (TcdA), C. diff Toxin B (TcdB)(630) and (TcdB)(027) and Binary Toxin (CDT) Tc bovine-derived anti-quadrivalent toxin hIgG provided 90% to 100% protection in hamsters against CDI strain 630 or more virulent epidemic strain NAP1 Clostridium difficile chimeric toxin receptor binding domain vaccine induced protection against different strains in active and passive challenge models.. Jing-Hui Tian a, Gregory Glenn a, David Flyer a, Bin Zhou a, Ye Liu a, Eddie Sullivan b, Hua Wub, James F. Cummings a, Larry Ellingsworth a,⇑, Gale Smith https://pubmed.ncbi.nlm.nih.gov/28669616/#:~:text=Vaccine,33)%3A4079%2D4087© 2023 SAB BIOTHERAPEUTICS, INC.

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![Slide 16](sabs-ex99_2s16.jpg)

Only SAB-195 Can Target Multiple C. diff Antigens and Toxins in One Therapeutic Comprehensive approach to treating patients with CDI addresses the entire life cycle of the C. diff pathogen and disease pathophysiology© 2023 SAB BIOTHERAPEUTICS, INC.

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![Slide 17](sabs-ex99_2s17.jpg)

Value Proposition: SAB-142 First-in-class fully human polyclonal antibody treatment aimed to provide superior efficacy for delaying onset and progression of clinical Stage 3 T1D Validated Mechanism of Action by a 3rd party ATG demonstrating reduction in loss of C-peptide vs. placebo (Haller, 2019) First-in-class fully human polyclonal antibody treatment aimed to provide superior efficacy for delaying onset of clinical Stage 3 Type 1 Diabetes (T1D) Key Differentiators© 2023 SAB BIOTHERAPEUTICS, INC.

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![Slide 18](sabs-ex99_2s18.jpg)

SAB-142 Demonstrates Similar Activity to Approved Rabbit Anti-Thymocyte Globulin (ATG) CD8 T Cells Treg Cells Live cells in CD8\* gate Live CD4+CD25+Foxp3- Activated CD4 T Cells Live CD4+CD25+Foxp3- Naïve CD4 T Cells Live CD4+CD25+Foxp3- SAB-142 Targets CD4+, CD8+ and Protects T-Regulatory Cells© 2023 SAB BIOTHERAPEUTICS, INC.

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![Slide 19](sabs-ex99_2s19.jpg)

SAB-142: GLP Tox Study Results Enable IND Submission© 2023 SAB BIOTHERAPEUTICS, INC. Objectives: Determine the potential toxicity of SAB-142 vs. an anti-thymocyte globulin (ATG) when given by single intravenous infusion to non-human primates Characterize mechanism of action, toxicokinetic & immunogenicity profile of SAB-142 Results: GLP-tox study demonstrated SAB-142 is well tolerated at escalating doses tested Both SAB-142 and its active control, an FDA-approved rabbit-derived ATG, induced transient and prolonged lymphodepletion for the duration of the study. The dynamics of such depletion appears to be more prolonged with SAB-142 treatment in a dose-dependent manner

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![Slide 20](sabs-ex99_2s20.jpg)

SAB-142: MoA Clinically Validated by 3rd Party Compound 2 Years: Low-Dose ATG\* Preserved C-Peptide in New Onset T1D 20 p=0.00005 ATG vs Placebo Placebo \*RABBIT ATG FROM SANOFI – NOT SAB-142 (HUMAN TC-BOVINE DERIVED ATG) Haller et al. Diabetes. 2019. June, 68(6): 1267-1276 EQUINE ATGAM-AF488 Tc Bovine Human-PB, Rabbit THYMO-AF488,Equine ATGAM-AF488 and Anti-CD3-APC RABBIT THYMO-AF488© 2023 SAB BIOTHERAPEUTICS, INC.

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![Slide 21](sabs-ex99_2s21.jpg)

Comprehensive approach to treating Stage 2/3 T1D with fully-human pAb anti-thymocyte immunotherapeutic© 2022 SAB BIOTHERAPEUTICS, INC. SAB-142: Only Fully-Human Polyclonal Anti-Thymocyte Immunoglobulin© 2023 SAB BIOTHERAPEUTICS, INC.

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![Slide 22](sabs-ex99_2s22.jpg)

Summary 22 DIVERSITABTM Platform: Innovative DiversitAb™ platform produces a new class of targeted fully-human, highly-potent polyclonal antibodies, with a broad efficacy spectrum in a broad range of indications. Platform is well-positioned to address complex diseases with targeting multiple epitopes & pathways in one therapeutic; it has potential to exceed industry PTRS and timelines benchmarks SAB-176: First-in-class fully-human polyclonal antibody treatment aimed to provide superior efficacy for prophylaxis and management of influenza in patients at high-risk, planned initiation of Phase 2b trial in 2H 2023. SAB-195: Preclinical data supports potential for competitive efficacy as first-line polyclonal antibody therapy for severe CDI in patients who are at a high risk for recurrences, expect to file IND in H2 2023-H1 2024. SAB-142: First-in-class fully-human polyclonal antibody treatment aimed to provide superior efficacy for delaying onset of clinical Stage 3 Type 1 Diabetes. IND-enabling GLP tox successfully completed with IND submission expected in 2023-2024.© 2023 SAB BIOTHERAPEUTICS, INC.