SAB Biotherapeutics, Inc.: which funds bought and sold

Institutions that bought and sold SAB Biotherapeutics shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 56 institutions that filed 13F reports for both quarters added to or opened positions in SAB Biotherapeutics, and 36 cut or closed them. Together they sold a net 709K shares, −1.0% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 1.6M shares (−3.7%); index fund managers were net buyers of 5.6M shares (+163.5%). 32 opened a new position and 20 sold out entirely.

Bought, Q2 2026 56 institutions, 32 of them new holders Sold, Q2 2026 36 institutions, 20 of them sold out

Net change, all compared −709K shares (−1.0%)

Net change, active managers −1.6M shares (−3.7%), 8 bought, 10 sold

Buyers versus sellers

institutions compared, 106

56 bought 14 36 sold

Active managers and hedge funds 8 bought · 10 sold · −1.6M

Index fund managers 9 bought · 0 sold · +5.6M

Other institutions 39 bought · 26 sold · −4.7M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Adage Capital Partners Gp, L.L.C. Hedge fund	+3.0M +88.1%	6.4M	$25M
Blackrock, Inc. Index funds	+2.8M +917.5%	3.1M	$12M
Geode Capital Management, LLC Index funds	+975K +322.9%	1.3M	$5M
Affinity Asset Advisors, LLC	+950K +165.2%	1.5M	$5.9M
Seven Fleet Capital Management LP	+636K +636.1%	736K	$2.9M
Vanguard Capital Management LLC Index funds	+479K +19.2%	3.0M	$11.6M
State Street Corp Index funds	+457K +615.1%	531K	$2.1M
Susquehanna International Group, LLP	+439K New position	439K	$1.7M
UBS Group AG	+319K +684.8%	366K	$1.4M
Polymer Capital Management (HK) Ltd	+307K New position	307K	$1.2M
Northern Trust Corp Index funds	+305K +531.2%	362K	$1.4M
Vanguard Portfolio Management LLC Index funds	+293K New position	293K	$1.1M
Perceptive Advisors LLC Hedge fund	+196K +3.0%	6.6M	$25.8M
Vanguard Fiduciary Trust Co Index funds	+176K +89.2%	374K	$1.5M
Bank Of New York Mellon Corp	+108K New position	108K	$420,604
Charles Schwab Investment Management Inc Index funds	+106K New position	106K	$412,160
Alps Advisors Inc	+78K New position	78K	$302,640
Goldman Sachs Group Inc	+77K +67.9%	191K	$746,089
Propel Bio Management, LLC	+64K +6.3%	1.1M	$4.2M
Citadel Advisors LLC Hedge fund	+63K New position	63K	$244,908

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Adage Capital Partners Gp, L.L.C. Hedge fund	+3.0M +88.1%	6.4M	$25M
Perceptive Advisors LLC Hedge fund	+196K +3.0%	6.6M	$25.8M
Citadel Advisors LLC Hedge fund	+63K New position	63K	$244,908
American Century Companies Inc Active manager	+47K +126.1%	85K	$330,271
Price T Rowe Associates Inc Active manager	+36K New position	36K	$139,000
Two Sigma Investments, LP Hedge fund	+33K +18.5%	215K	$837,065
Alliancebernstein L.P. Active manager	+27K New position	27K	$105,183
FMR LLC Active manager	+116 New position	116	$452

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Vivo Capital, LLC	−4.1M −36.1%	7.3M	$28.5M
Woodline Partners LP Hedge fund	−1.7M −58.6%	1.2M	$4.6M
Commodore Capital LP Hedge fund	−1.5M −34.8%	2.9M	$11.2M
Jefferies Financial Group Inc.	−903K Sold out	0	—
Ameriprise Financial Inc	−865K −58.6%	611K	$2.4M
Exoduspoint Capital Management, LP Hedge fund	−769K Sold out	0	—
Monashee Investment Management LLC	−500K Sold out	0	—
Marshall Wace, LLP Hedge fund	−464K Sold out	0	—
Stempoint Capital LP	−407K −54.3%	343K	$1.3M
Dv Trading LLC	−400K Sold out	0	—
Millennium Management LLC Hedge fund	−284K −9.4%	2.7M	$10.7M
Seven Grand Managers, LLC	−275K Sold out	0	—
Ensign Peak Advisors, Inc	−203K −14.8%	1.2M	$4.6M
Soleus Capital Management, L.P. Hedge fund	−150K −14.3%	900K	$3.5M
Simplify Asset Management Inc.	−82K −44.0%	105K	$408,911
Brevan Howard Capital Management LP Hedge fund	−59K Sold out	0	—
Fifth Lane Capital, LP	−47K Sold out	0	—
Commonwealth Equity Services, LLC	−46K Sold out	0	—
Persistent Asset Partners Ltd	−44K −63.6%	25K	$99,060
Virtu Financial LLC	−38K Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Woodline Partners LP Hedge fund	−1.7M −58.6%	1.2M	$4.6M
Commodore Capital LP Hedge fund	−1.5M −34.8%	2.9M	$11.2M
Exoduspoint Capital Management, LP Hedge fund	−769K Sold out	0	—
Marshall Wace, LLP Hedge fund	−464K Sold out	0	—
Millennium Management LLC Hedge fund	−284K −9.4%	2.7M	$10.7M
Soleus Capital Management, L.P. Hedge fund	−150K −14.3%	900K	$3.5M
Brevan Howard Capital Management LP Hedge fund	−59K Sold out	0	—
Qube Research & Technologies Ltd Hedge fund	−24K Sold out	0	—
Quadrature Capital Ltd Hedge fund	−20K −56.9%	15K	$59,261
Hudson Bay Capital Management LP Hedge fund	−16K Sold out	0	—

New positions

largest by value

Institution	Shares	Value June 30, 2026
Susquehanna International Group, LLP	439K	$1.7M
Polymer Capital Management (HK) Ltd	307K	$1.2M
Vanguard Portfolio Management LLCIndex funds	293K	$1.1M
Bank Of New York Mellon Corp	108K	$420,604
Charles Schwab Investment Management IncIndex funds	106K	$412,160
Alps Advisors Inc	78K	$302,640
Citadel Advisors LLCHedge fund	63K	$244,908
Nuveen, LLC	58K	$227,752
Rhumbline AdvisersIndex funds	45K	$176,133
Wells Fargo & Company	44K	$171,924

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Jefferies Financial Group Inc.	903K	$3.5M
Exoduspoint Capital Management, LPHedge fund	769K	$2.9M
Monashee Investment Management LLC	500K	$1.9M
Marshall Wace, LLPHedge fund	464K	$1.8M
Dv Trading LLC	400K	$1.5M
Seven Grand Managers, LLC	275K	$1.1M
Brevan Howard Capital Management LPHedge fund	59K	$226,587
Fifth Lane Capital, LP	47K	$178,095
Commonwealth Equity Services, LLC	46K	$177,920
Virtu Financial LLC	38K	$145,000

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 87
Ten largest holders: 70.4%
Index fund managers: 13.2%
Active managers and hedge funds: 59.9%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	8	10	4	5	−1.6M	−3.7%
Index fund managers	9	0	3	0	+5.6M	+163.5%
Other institutions	39	26	25	15	−4.7M	−20.8%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on SAB Biotherapeutics.

Only managers that filed a holdings report for both quarters are compared (106 here). 2 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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