Cytomx Therapeutics, Inc.: which funds bought and sold

Institutions that bought and sold Cytomx Therapeutics 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, 116 institutions that filed 13F reports for both quarters added to or opened positions in Cytomx Therapeutics, and 78 cut or closed them. Together they added a net 19.6M shares, +10.2% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 3.3M shares (+3.2%); index fund managers were net buyers of 23.7M shares (+96.2%). 45 opened a new position and 45 sold out entirely.

Bought, Q2 2026 116 institutions, 45 of them new holders Sold, Q2 2026 78 institutions, 45 of them sold out

Net change, all compared +19.6M shares (+10.2%)

Net change, active managers +3.3M shares (+3.2%), 20 bought, 23 sold

Buyers versus sellers

institutions compared, 221

116 bought 27 78 sold

Active managers and hedge funds 20 bought · 23 sold · +3.3M

Index fund managers 9 bought · 3 sold · +23.7M

Other institutions 87 bought · 52 sold · −7.4M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Blackrock, Inc. Index funds	+12.3M +235.9%	17.6M	$65.8M
Kynam Capital Management, LP Hedge fund	+6.7M +44.6%	21.7M	$81.4M
State Street Corp Index funds	+6.1M +107.4%	11.7M	$44.1M
Bank Of America Corp	+4.9M +47.8%	15.1M	$56.6M
Geode Capital Management, LLC Index funds	+2.6M +126.4%	4.7M	$17.5M
Wellington Management Group LLP Active manager	+1.6M +44.3%	5.2M	$19.4M
Two Sigma Investments, LP Hedge fund	+1.4M +52.5%	4.1M	$15.5M
Tudor Investment Corp Et Al Hedge fund	+1.4M New position	1.4M	$5.2M
Northern Trust Corp Index funds	+1.1M +173.7%	1.7M	$6.3M
Vanguard Portfolio Management LLC Index funds	+956K +120.3%	1.8M	$6.6M
FMR LLC Active manager	+759K +2.4%	32.7M	$123M
Seven Fleet Capital Management LP	+714K +192.2%	1.1M	$4.1M
Sphera Funds Management Ltd.	+659K +299.5%	879K	$3.3M
Goldman Sachs Group Inc	+544K +37.3%	2.0M	$7.5M
Nuveen, LLC	+448K New position	448K	$1.7M
Charles Schwab Investment Management Inc Index funds	+421K +326.9%	550K	$2.1M
Bank Of New York Mellon Corp	+395K +136.2%	685K	$2.6M
Eversept Partners, LP Hedge fund	+370K +11.6%	3.6M	$13.3M
Assenagon Asset Management S.A.	+364K +100.0%	728K	$2.7M
UBS Group AG	+348K +11.2%	3.5M	$13M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Kynam Capital Management, LP Hedge fund	+6.7M +44.6%	21.7M	$81.4M
Wellington Management Group LLP Active manager	+1.6M +44.3%	5.2M	$19.4M
Two Sigma Investments, LP Hedge fund	+1.4M +52.5%	4.1M	$15.5M
Tudor Investment Corp Et Al Hedge fund	+1.4M New position	1.4M	$5.2M
FMR LLC Active manager	+759K +2.4%	32.7M	$123M
Eversept Partners, LP Hedge fund	+370K +11.6%	3.6M	$13.3M
Perceptive Advisors LLC Hedge fund	+340K +3.4%	10.4M	$39.1M
Price T Rowe Associates Inc Active manager	+148K New position	148K	$556,000
Walleye Capital LLC Hedge fund	+127K New position	127K	$474,473
Alliancebernstein L.P. Active manager	+104K New position	104K	$490,257

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Venrock Adviser, LLC	−5.0M −50.1%	5.0M	$18.7M
Jefferies Financial Group Inc.	−3.1M Sold out	0	—
Citadel Advisors LLC Hedge fund	−2.3M −42.5%	3.1M	$11.7M
Millennium Management LLC Hedge fund	−2.0M −53.9%	1.7M	$6.3M
Susquehanna International Group, LLP	−1.8M −95.2%	91K	$340,024
Marshall Wace, LLP Hedge fund	−1.1M −26.9%	3.0M	$11.3M
Patient Square Capital LP	−1.1M Sold out	0	—
Jane Street Group, LLC	−998K Sold out	0	—
Eventide Asset Management, LLC	−900K Sold out	0	—
Trexquant Investment LP Hedge fund	−899K Sold out	0	—
Balyasny Asset Management L.P. Hedge fund	−731K Sold out	0	—
Dv Trading LLC	−714K Sold out	0	—
BNP Paribas Financial Markets	−575K −94.8%	32K	$118,920
Informed Momentum Co LLC	−565K Sold out	0	—
Longaeva Partners L.P.	−550K Sold out	0	—
Qube Research & Technologies Ltd Hedge fund	−425K −18.9%	1.8M	$6.8M
Velan Capital Investment Management LP	−420K −77.8%	120K	$450,000
Gilder Gagnon Howe & Co LLC Active manager	−416K −37.1%	704K	$2.6M
683 Capital Management, LLC Hedge fund	−405K −95.3%	20K	$75,000
Morgan Stanley	−330K −63.3%	191K	$715,496

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Citadel Advisors LLC Hedge fund	−2.3M −42.5%	3.1M	$11.7M
Millennium Management LLC Hedge fund	−2.0M −53.9%	1.7M	$6.3M
Marshall Wace, LLP Hedge fund	−1.1M −26.9%	3.0M	$11.3M
Trexquant Investment LP Hedge fund	−899K Sold out	0	—
Balyasny Asset Management L.P. Hedge fund	−731K Sold out	0	—
Qube Research & Technologies Ltd Hedge fund	−425K −18.9%	1.8M	$6.8M
Gilder Gagnon Howe & Co LLC Active manager	−416K −37.1%	704K	$2.6M
683 Capital Management, LLC Hedge fund	−405K −95.3%	20K	$75,000
Soleus Capital Management, L.P. Hedge fund	−300K Sold out	0	—
Brevan Howard Capital Management LP Hedge fund	−269K Sold out	0	—

New positions

largest by value

Institution	Shares	Value June 30, 2026
Tudor Investment Corp Et AlHedge fund	1.4M	$5.2M
Nuveen, LLC	448K	$1.7M
Rhumbline AdvisersIndex funds	223K	$834,420
Focus Partners Wealth	198K	$742,043
Price T Rowe Associates IncActive manager	148K	$556,000
Alliancebernstein L.P.Active manager	104K	$490,257
Walleye Capital LLCHedge fund	127K	$474,473
Metlife Investment Management, LLC	105K	$392,381
Robertson Stephens Wealth Management, LLC	96K	$360,000
Algert Global LLCHedge fund	91K	$340,875

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Jefferies Financial Group Inc.	3.1M	$14.4M
Patient Square Capital LP	1.1M	$5.1M
Jane Street Group, LLC	998K	$4.7M
Eventide Asset Management, LLC	900K	$4.2M
Trexquant Investment LPHedge fund	899K	$4.2M
Balyasny Asset Management L.P.Hedge fund	731K	$3.4M
Dv Trading LLC	714K	$3.4M
Informed Momentum Co LLC	565K	$2.7M
Longaeva Partners L.P.	550K	$2.6M
Seven Grand Managers, LLC	325K	$1.5M

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 179
Ten largest holders: 63.6%
Index fund managers: 22.6%
Active managers and hedge funds: 51.0%

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	20	23	9	14	+3.3M	+3.2%
Index fund managers	9	3	2	0	+23.7M	+96.2%
Other institutions	87	52	34	31	−7.4M	−11.8%

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 Cytomx Therapeutics.

Only managers that filed a holdings report for both quarters are compared (221 here). 6 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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