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Biotechnology Value Fund group discloses 9.1% stake in SAB Biotherapeutics (SABS)

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
SCHEDULE 13G/A

Rhea-AI Filing Summary

Biotechnology Value Fund–affiliated investors reported a significant ownership position in SAB Biotherapeutics, Inc. As of the close of business on December 31, 2025, their funds and a managed account held 30,000 Tranche C warrants for Series A-3 Preferred Stock, convertible into 4,761,906 common shares.

The preferred shares convert at $6.30 per common share, based on a $1,000 per preferred share value, and the warrants are exercisable beginning November 23, 2023 for five years. Using 47,606,851 common shares outstanding as of November 10, 2025, the filing states BVF-related entities may be deemed to beneficially own up to approximately 9.1% of the class.

The structure includes a 9.99% “Maximum Percentage” cap that limits conversions so no holder, together with its affiliates and attribution parties, crosses that ownership threshold.

Positive

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Negative

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Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)






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SCHEDULE 13G



BIOTECHNOLOGY VALUE FUND L P
Signature:/s/ Mark N. Lampert
Name/Title:Mark N. Lampert, Authorized Signatory
Date:02/17/2026
BVF I GP LLC
Signature:/s/ Mark N. Lampert
Name/Title:Mark N. Lampert, Authorized Signatory
Date:02/17/2026
BIOTECHNOLOGY VALUE FUND II LP
Signature:/s/ Mark N. Lampert
Name/Title:Mark N. Lampert, Authorized Signatory
Date:02/17/2026
BVF II GP LLC
Signature:/s/ Mark N. Lampert
Name/Title:Mark N. Lampert, Authorized Signatory
Date:02/17/2026
Biotechnology Value Trading Fund OS LP
Signature:/s/ Mark N. Lampert
Name/Title:Mark N. Lampert, Authorized Signatory
Date:02/17/2026
BVF Partners OS Ltd.
Signature:/s/ Mark N. Lampert
Name/Title:Mark N. Lampert, Authorized Signatory
Date:02/17/2026
BVF GP HOLDINGS LLC
Signature:/s/ Mark N. Lampert
Name/Title:Mark N. Lampert, Authorized Signatory
Date:02/17/2026
BVF PARTNERS L P/IL
Signature:/s/ Mark N. Lampert
Name/Title:Mark N. Lampert, Authorized Signatory
Date:02/17/2026
BVF INC/IL
Signature:/s/ Mark N. Lampert
Name/Title:Mark N. Lampert, Authorized Signatory
Date:02/17/2026
LAMPERT MARK N
Signature:/s/ Mark N. Lampert
Name/Title:Mark N. Lampert
Date:02/17/2026

FAQ

What ownership stake in SAB Biotherapeutics (SABS) does Biotechnology Value Fund report?

Affiliates of Biotechnology Value Fund may be deemed to beneficially own about 9.1% of SAB Biotherapeutics’ common stock. This percentage is based on existing shares outstanding plus up to 4,761,906 shares issuable from convertible preferred stock underlying Tranche C warrants.

How many SAB Biotherapeutics shares are tied to the BVF Tranche C warrants?

The filing states BVF-related holders have Tranche C warrants ultimately convertible into 4,761,906 SAB Biotherapeutics common shares. These arise from Series A-3 Preferred Stock, with each preferred share effectively representing $1,000 of value at a $6.30 per share conversion price.

What is the Maximum Percentage conversion cap mentioned for SAB Biotherapeutics (SABS)?

The Series A-3 Preferred Stock includes a 9.99% “Maximum Percentage” cap on beneficial ownership after conversion. Holders cannot convert if doing so would push them, together with affiliates and attribution parties, above 9.99% of SAB’s outstanding common shares.

How are the BVF entities’ individual SAB Biotherapeutics stakes broken down?

As of December 31, 2025, the filing reports BVF at about 5.1%, BVF2 at about 3.9%, and Biotechnology Value Trading Fund OS at less than 1% of SAB common stock, with higher aggregate percentages attributed to certain parent and manager entities.

What share count did SAB Biotherapeutics report outstanding for these ownership calculations?

Percentages use a denominator including 47,606,851 common shares outstanding as of November 10, 2025, as disclosed in SAB Biotherapeutics’ Form 10-Q, plus certain or all of the 4,761,906 shares issuable upon conversion of Series A-3 Preferred Stock.

When do the SAB Biotherapeutics Tranche C warrants held by BVF become exercisable and when do they expire?

The Tranche C warrants became exercisable on November 23, 2023 at an exercise price of $1,000 per share of Series A-3 Preferred Stock. According to the filing, these warrants expire on the five-year anniversary of November 23, 2023.
SAB BIOTHERAPEUTICS INC

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Biotechnology
Biological Products, (no Diagnostic Substances)
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United States
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