Vault-13

SAB BIOTHERAPEUTICS INC SABS

COM NEW · Common Stock · CUSIP 78397T202

87 institutional holders +11 vs Q1 2026
68,293,21568.3m shares reported held*
$266.3mreported value*
31 new 25 added 16 reduced 20 sold out net sold ≈ $4.3m (-1.1m shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($408.9k this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $3.90. Options: 5 managers hold calls ($760.1k notional), 2 hold puts ($923.1k).

Trends to Q2 2026

Institutional holders

Managers reporting a position, each quarter

050100Q4 23: 3Q1 24: 25Q2 24: 23Q3 24: 26Q4 24: 26Q1 25: 27Q2 25: 26Q3 25: 34Q4 25: 48Q1 26: 76Q2 26: 8787Q4 23Q2 24Q4 24Q2 25Q4 25Q2 26
Numbers
QuarterHolders
Q4 20233
Q1 202425
Q2 202423
Q3 202426
Q4 202426
Q1 202527
Q2 202526
Q3 202534
Q4 202548
Q1 202676
Q2 202687

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
1000100Q3 24: 7 bought or addedQ3 24: 6 cut or sold outQ4 24: 9 bought or addedQ4 24: 11 cut or sold outQ4 24Q1 25: 10 bought or addedQ1 25: 10 cut or sold outQ2 25: 9 bought or addedQ2 25: 8 cut or sold outQ2 25Q3 25: 22 bought or addedQ3 25: 6 cut or sold outQ4 25: 30 bought or addedQ4 25: 11 cut or sold outQ4 25Q1 26: 55 bought or addedQ1 26: 11 cut or sold outQ2 26: 56 bought or addedQ2 26: 36 cut or sold outQ2 26
Numbers
QuarterBought or addedCut or sold out
Q3 202476
Q4 2024911
Q1 20251010
Q2 202598
Q3 2025226
Q4 20253011
Q1 20265511
Q2 20265636

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$250k$500k$750k$1mQ3 25 calls: $0Q3 25 puts: $0Q3 25P/C —Q4 25 calls: $0Q4 25 puts: $0Q4 25P/C —Q1 26 calls: $611.3kQ1 26 puts: $283.0kQ1 26P/C 0.46Q2 26 calls: $760.1kQ2 26 puts: $923.1kQ2 26P/C 1.21
Numbers
QuarterCallsPutsP/C
Q3 2025$0$0—
Q4 2025$0$0—
Q1 2026$611.3k$283.0k0.46
Q2 2026$760.1k$923.1k1.21

Biggest buyers

ADAGE CAPITAL PARTNERS GP, L.L.C. Added +3,000,000+3.0m
BlackRock, Inc. Added +2,764,690+2.8m
GEODE CAPITAL MANAGEMENT, LLC Added +975,149+975.1k
Affinity Asset Advisors, LLC Added +950,000+950.0k
VANGUARD CAPITAL MANAGEMENT LLC Added +479,192+479.2k
STATE STREET CORP Added +456,600+456.6k
SUSQUEHANNA INTERNATIONAL GROUP, LLP New +438,515+438.5k
UBS Group AG Added +319,255+319.3k
Polymer Capital Management (HK) LTD New +306,581+306.6k
NORTHERN TRUST CORP Added +305,063+305.1k

Biggest sellers

Vivo Capital, LLC Reduced -4,120,091-4.1m
Woodline Partners LP Reduced -1,671,436-1.7m
Commodore Capital LP Reduced -1,531,500-1.5m
Jefferies Financial Group Inc. Sold out -903,094-903.1k
AMERIPRISE FINANCIAL INC Reduced -865,087-865.1k
ExodusPoint Capital Management, LP Sold out -768,627-768.6k
Monashee Investment Management LLC Sold out -500,000-500.0k
MARSHALL WACE, LLP Sold out -463,925-463.9k
STEMPOINT CAPITAL LP Reduced -407,369-407.4k
DV Trading LLC Sold out -400,000-400.0k

Biggest calls

CITADEL ADVISORS LLC Added $315.9k81.0k shares
JANE STREET GROUP, LLC Reduced $209.0k53.6k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced $110.8k28.4k shares
GROUP ONE TRADING LLC Added $78.8k20.2k shares
SIMPLEX TRADING, LLC Added $45.6k11.7k shares

Biggest puts

JANE STREET GROUP, LLC Added $883.4k226.5k shares
SIMPLEX TRADING, LLC Reduced $39.8k10.2k shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Vivo Opportunity Fund Holdings, L.P. 13G · passive investor no change · filed 2026-08-14 10.0% no change 22.6m≈ $88.3m 2026-08-14
Commodore Capital LP 13G · passive investor no change · filed 2026-08-14 9.9% no change 8.9m≈ $34.9m 2026-08-14
RA CAPITAL MANAGEMENT, L.P. 13D · may seek influence no change · filed 2026-08-10 9.9% no change 9.6m≈ $37.5m 2026-08-10
BALYASNY ASSET MANAGEMENT L.P. 13G · institution -0.5 pts · filed 2026-08-14 9.4% -0.5 pts 7.2m≈ $28.2m 2026-08-14
BIOTECHNOLOGY VALUE FUND L P 13G · passive investor -0.9 pts · filed 2026-02-17 9.1% -0.9 pts 4.8m≈ $18.6m 2026-02-17
Caligan Partners LP 13G · institution -1.6 pts · filed 2026-08-14 8.8% -1.6 pts 8.0m≈ $31.1m 2026-08-14
Adage Capital Management, L.P. 13G · institution new · filed 2026-08-12 8.4% new 6.4m≈ $25.0m 2026-08-12
PERCEPTIVE ADVISORS LLC 13G · passive investor -1.1 pts · filed 2026-08-14 7.3% -1.1 pts 6.6m≈ $25.8m 2026-08-14
Woodline Partners LP 13G · institution -3.1 pts · filed 2026-08-14 6.8% -3.1 pts 5.5m≈ $21.3m 2026-08-14
MILLENNIUM MANAGEMENT LLC 13G · passive investor new · filed 2026-05-01 5.1% new 3.4m≈ $13.4m 2026-05-01

Fell to 5% or below in the last year: RTW INVESTMENTS, LP (3.2%, 2026-02-17)

Insider purchases and sales since 1 Apr 2026

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

None reported since 1 Apr 2026.

Holders, Q2 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Caligan Partners LP 1.50% of their portfolio NEW YORK, NY 7,967,2078.0m $31.1m $31.1m 1.50% Unchanged
2 Vivo Capital, LLC 2.60% of their portfolio Palo Alto, CA 7,299,9097.3m $28.5m $28.5m 2.60% Reduced -4.1m -4,120,091
3 PERCEPTIVE ADVISORS LLC 0.40% of their portfolio NEW YORK, NY 6,627,5016.6m $25.8m $25.8m 0.40% Added +195.8k +195,758
4 ADAGE CAPITAL PARTNERS GP, L.L.C. 0.04% of their portfolio Boston, MA 6,405,5536.4m $25.0m $25.0m 0.04% Added +3.0m +3,000,000
5 RA CAPITAL MANAGEMENT, L.P. 0.15% of their portfolio BOSTON, MA 4,401,5004.4m $17.2m $17.2m 0.15% Unchanged
6 Balyasny Asset Management L.P. 0.03% of their portfolio Chicago, IL 3,760,4393.8m $14.7m $14.7m 0.03% Unchanged
7 BlackRock, Inc. 0.00% of their portfolio New York, NY 3,066,0163.1m $12.0m $12.0m 0.00% Added +2.8m +2,764,690
8 VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio MALVERN, PA 2,972,9293.0m $11.6m $11.6m 0.00% Added +479.2k +479,192
9 Commodore Capital LP 0.67% of their portfolio NEW YORK, NY 2,870,0002.9m $11.2m $11.2m 0.67% Reduced -1.5m -1,531,500
10 MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio NEW YORK, NY 2,749,0872.7m $10.7m $10.7m 0.01% Reduced -283.6k -283,610
11 Spruce Street Capital LP 1.68% of their portfolio NEW YORK, NY 2,198,5022.2m $8.6m $8.6m 1.68% Unchanged
12 Sessa Capital IM, L.P. 0.15% of their portfolio NEW YORK, NY 2,198,4572.2m $8.6m $8.6m 0.15% Unchanged
13 Affinity Asset Advisors, LLC 0.29% of their portfolio NEW YORK, NY 1,525,0001.5m $5.9m $5.9m 0.29% Added +950.0k +950,000
14 BOOTHBAY FUND MANAGEMENT, LLC 0.11% of their portfolio NEW YORK, NY 1,481,6601.5m $5.8m $5.8m 0.11% Unchanged
15 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 1,277,1851.3m $5.0m $5.0m 0.00% Added +975.1k +975,149
16 Woodline Partners LP 0.01% of their portfolio San Francisco, CA 1,180,3551.2m $4.6m $4.6m 0.01% Reduced -1.7m -1,671,436
17 Ensign Peak Advisors, Inc 0.01% of their portfolio SALT LAKE CITY, UT 1,172,6411.2m $4.6m $4.6m 0.01% Reduced -203.0k -202,969
18 Propel Bio Management, LLC 2.20% of their portfolio Los Angeles, CA 1,076,5781.1m $4.2m $4.2m 2.20% Added +63.8k +63,788
19 Soleus Capital Management, L.P. 0.12% of their portfolio GREENWICH, CT 900,000900.0k $3.5m $3.5m 0.12% Reduced -150.0k -150,000
20 Seven Fleet Capital Management LP 0.47% of their portfolio MOUNTAIN VIEW, CA 736,077736.1k $2.9m $2.9m 0.47% Added +236.1k +236,077
21 AMERIPRISE FINANCIAL INC 0.00% of their portfolio MINNEAPOLIS, MN 611,019611.0k $2.4m $2.4m 0.00% Reduced -865.1k -865,087
22 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 530,831530.8k $2.1m $2.1m 0.00% Added +456.6k +456,600
23 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 438,515438.5k $1.7m $1.7m 0.00% New
24 DV EQUITIES, LLC 0.23% of their portfolio CHICAGO, IL 400,000400.0k $1.6m $1.6m 0.23% First filing
25 AWM Investment Company, Inc. 0.13% of their portfolio NEW YORK, NY 375,000375.0k $1.5m $1.5m 0.13% Reduced -25.0k -25,000
26 VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio MALVERN, PA 373,980374.0k $1.5m $1.5m 0.00% Added +176.4k +176,361
27 UBS Group AG 0.00% of their portfolio ZURICH, V8 365,878365.9k $1.4m $1.4m 0.00% Added +319.3k +319,255
28 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 362,489362.5k $1.4m $1.4m 0.00% Added +305.1k +305,063
29 STEMPOINT CAPITAL LP 0.23% of their portfolio NEW YORK, NY 342,631342.6k $1.3m $1.3m 0.23% Reduced -407.4k -407,369
30 HB Wealth Management, LLC 0.01% of their portfolio Atlanta, GA 307,500307.5k $1.2m $1.2m 0.01% Unchanged
31 Polymer Capital Management (HK) LTD 0.12% of their portfolio HONG KONG, K3 306,581306.6k $1.2m $1.2m 0.12% New
32 VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio MALVERN, PA 292,728292.7k $1.1m $1.1m 0.00% New
33 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 214,632214.6k $837.1k $837.1k 0.00% Added +33.4k +33,447
34 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 191,305191.3k $746.1k $746.1k 0.00% Added +77.4k +77,365
35 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 107,847107.8k $420.6k $420.6k 0.00% New
36 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 105,682105.7k $412.2k $412.2k 0.00% New
37 Simplify Asset Management Inc. 0.01% of their portfolio Las Vegas, NV 104,849104.8k $408.9k $408.9k 0.01% Reduced -82.4k -82,381
38 AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio KANSAS CITY, MO 84,68584.7k $330.3k $330.3k 0.00% Added +47.2k +47,230
39 ALPS ADVISORS INC 0.00% of their portfolio Denver, CO 77,60077.6k $302.6k $302.6k 0.00% New
40 Stonepine Capital Management, LLC 0.22% of their portfolio Bend, OR 73,27173.3k $285.8k $285.8k 0.22% Added +23.3k +23,271
41 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 62,79762.8k $244.9k $244.9k 0.00% New
42 Nuveen, LLC 0.00% of their portfolio CHARLOTTE, NC 58,39858.4k $227.8k $227.8k 0.00% New
43 Pathstone Holdings, LLC 0.00% of their portfolio ENGLEWOOD, NJ 50,65050.6k $197.5k $197.5k 0.00% Unchanged
44 Kestra Advisory Services, LLC 0.00% of their portfolio AUSTIN, TX 49,81149.8k $194.3k $194.3k 0.00% Reduced -11.9k -11,930
45 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 45,16445.2k $176.1k $176.1k 0.00% New
46 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 44,08344.1k $171.9k $171.9k 0.00% New
47 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 42,37142.4k $165.2k $165.2k 0.00% New
48 IFP Advisors, Inc 0.00% of their portfolio TAMPA, FL 38,69938.7k $150.9k $150.9k 0.00% New
49 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 35,90235.9k $140.0k $140.0k 0.00% Added +35.4k +35,406
50 PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio BALTIMORE, MD 35,62035.6k $139.0k $139.0k 0.00% New
51 MetLife Investment Management, LLC 0.00% of their portfolio Whippany, NJ 28,01528.0k $109.3k $109.3k 0.00% New
52 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 26,97027.0k $105.2k $105.2k 0.00% New
53 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 26,58426.6k $103.7k $103.7k 0.00% Reduced -10.2k -10,221
54 Persistent Asset Partners Ltd 0.03% of their portfolio HONG KONG, K3 25,40025.4k $99.1k $99.1k 0.03% Reduced -44.3k -44,332
55 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 25,12625.1k $98.0k $98.0k 0.00% Reduced -30.6k -30,571
56 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 22,59322.6k $88.1k $88.1k 0.00% New
57 MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio CAUSEWAY BAY, K3 19,99620.0k $78.0k $78.0k 0.00% New
58 First PREMIER Bank 0.01% of their portfolio SIOUX FALLS, SD 18,98619.0k $74.0k $74.0k 0.01% Unchanged
59 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 18,08918.1k $70.5k $70.5k 0.00% Added +18.0k +18,002
60 Scientech Research LLC 0.06% of their portfolio JERSEY CITY, NJ 17,44617.4k $68.0k $68.0k 0.06% Added +6.6k +6,630
61 Quadrature Capital Ltd 0.00% of their portfolio LONDON, X0 15,19515.2k $59.3k $59.3k 0.00% Reduced -20.1k -20,069
62 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 14,63414.6k $57.1k $57.1k 0.00% New
63 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 13,75013.8k $53.6k $53.6k 0.00% Added +1.8k +1,839
64 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio Toronto, A6 12,94712.9k $50.5k $50.5k 0.00% New
65 NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio ALBANY, NY 12,90012.9k $50.3k $50.3k 0.00% New
66 Miller Capital Partners, Inc. 0.02% of their portfolio TROY, MI 12,87012.9k $50.2k $50.2k 0.02% Unchanged
67 Police & Firemen's Retirement System of New Jersey 0.00% of their portfolio TRENTON, NJ 12,80712.8k $49.9k $49.9k 0.00% New
68 Vanguard Global Advisers, LLC 0.00% of their portfolio MALVERN, PA 11,85211.9k $46.2k $46.2k 0.00% Unchanged
69 PNC Financial Services Group, Inc. 0.00% of their portfolio Pittsburgh, PA 10,27010.3k $40.1k $40.1k 0.00% Added +2.6k +2,570
70 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 8,6338.6k $33.7k $33.7k 0.00% Added +7.7k +7,744
71 STRS OHIO 0.00% of their portfolio COLUMBUS, OH 8,5008.5k $33.1k $33.1k 0.00% New
72 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 8,0868.1k $31.5k $31.5k 0.00% Added +311 +311
73 Plante Moran Financial Advisors, LLC 0.00% of their portfolio SOUTHFIELD, MI 5,9255.9k $23.1k $23.1k 0.00% Unchanged
74 Legal & General Group Plc 0.00% of their portfolio London, X0 4,2234.2k $16.5k $16.5k 0.00% New
75 Ameritas Investment Partners, Inc. 0.00% of their portfolio LINCOLN, NE 3,9413.9k $15.4k $15.4k 0.00% New
76 Russell Investments Group, Ltd. 0.00% of their portfolio Seattle, WA 3,4723.5k $13.5k $13.5k 0.00% New
77 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 2,5202.5k $9.8k $9.8k 0.00% Reduced -749 -749
78 Federation des caisses Desjardins du Quebec 0.00% of their portfolio LEVIS, A8 2,0002.0k $7.8k $7.8k 0.00% New
79 GROUP ONE TRADING LLC 0.00% of their portfolio CHICAGO, IL 1,8521.9k $7.2k $7.2k 0.00% New
80 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 1,6871.7k $7.0k $7.0k 0.00% Added +1.7k +1,686
81 Truvestments Capital LLC 0.00% of their portfolio SARASOTA, FL 1,1001.1k $4.3k $4.3k 0.00% New
82 Sterling Capital Management LLC 0.00% of their portfolio CHARLOTTE, NC 875875 $3.4k $3.4k 0.00% New
83 Caitong International Asset Management Co., Ltd 0.00% of their portfolio HONG KONG, K3 742742 $2.9k $2.9k 0.00% Added +581 +581
84 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio WEST SACRAMENTO, CA 598598 $2.3k $2.3k 0.00% New
85 GS Investments, Inc. 0.00% of their portfolio Eagan, MN 200200 $780 $780 0.00% Unchanged
86 FMR LLC 0.00% of their portfolio BOSTON, MA 116116 $452 $452 0.00% New
87 HARBOUR INVESTMENTS, INC. 0.00% of their portfolio MADISON, WI 5050 $195 $195 0.00% Unchanged