Jazz Pharmaceuticals plc: which funds bought and sold

Institutions that bought and sold Jazz Pharmaceuticals 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, 367 institutions that filed 13F reports for both quarters added to or opened positions in Jazz Pharmaceuticals, and 242 cut or closed them. Together they sold a net 1.3M shares, −2.0% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 1.1M shares (−5.1%); index fund managers were net buyers of 928K shares (+5.9%). 126 opened a new position and 56 sold out entirely.

Bought, Q2 2026 367 institutions, 126 of them new holders Sold, Q2 2026 242 institutions, 56 of them sold out

Net change, all compared −1.3M shares (−2.0%)

Net change, active managers −1.1M shares (−5.1%), 34 bought, 34 sold

Buyers versus sellers

institutions compared, 689

367 bought 80 242 sold

Active managers and hedge funds 34 bought · 34 sold · −1.1M

Index fund managers 10 bought · 2 sold · +928K

Other institutions 323 bought · 206 sold · −1.1M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
FMR LLC Active manager	+2.3M +102.5%	4.6M	$1.1B
Mariner, LLC	+569K +1420.9%	609K	$147M
Victory Capital Management Inc Active manager	+430K +167.6%	687K	$165M
UBS Group AG	+400K +111.9%	757K	$182M
Two Sigma Investments, LP Hedge fund	+381K +1941.9%	400K	$96.4M
Blackrock, Inc. Index funds	+377K +6.7%	6.0M	$1.4B
William Blair Investment Management, LLC Active manager	+366K +516.4%	437K	$105M
Geode Capital Management, LLC Index funds	+245K +19.8%	1.5M	$357M
Argent Capital Management LLC	+200K New position	200K	$48.2M
AQR Capital Management LLC Hedge fund	+184K +13.8%	1.5M	$360M
Woodline Partners LP Hedge fund	+150K New position	150K	$36.2M
Bank Of America Corp	+121K +12.0%	1.1M	$274M
BNP Paribas Financial Markets	+121K +767.8%	137K	$33M
State Street Corp Index funds	+108K +5.7%	2.0M	$482M
Empowered Funds, LLC	+93K +650.6%	107K	$25.7M
Quantinno Capital Management LP	+82K +43.0%	274K	$65.9M
Vanguard Capital Management LLC Index funds	+81K +3.1%	2.7M	$658M
Franklin Resources Inc Active manager	+81K +4.2%	2.0M	$492M
Longaeva Partners L.P.	+69K New position	69K	$16.6M
Distillate Capital Partners LLC	+67K New position	67K	$16.2M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
FMR LLC Active manager	+2.3M +102.5%	4.6M	$1.1B
Victory Capital Management Inc Active manager	+430K +167.6%	687K	$165M
Two Sigma Investments, LP Hedge fund	+381K +1941.9%	400K	$96.4M
William Blair Investment Management, LLC Active manager	+366K +516.4%	437K	$105M
AQR Capital Management LLC Hedge fund	+184K +13.8%	1.5M	$360M
Woodline Partners LP Hedge fund	+150K New position	150K	$36.2M
Franklin Resources Inc Active manager	+81K +4.2%	2.0M	$492M
Squarepoint Ops LLC Hedge fund	+53K New position	53K	$12.8M
Schroder Investment Management Group Active manager	+48K +190.6%	73K	$17.3M
Los Angeles Capital Management LLC Active manager	+44K +147.2%	74K	$17.8M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Ecor1 Capital, LLC Hedge fund	−1.7M Sold out	0	—
Holocene Advisors, LP Hedge fund	−573K −78.1%	161K	$38.8M
Millennium Management LLC Hedge fund	−499K −39.5%	764K	$184M
Alyeska Investment Group, L.P. Hedge fund	−411K Sold out	0	—
Ameriprise Financial Inc	−393K −24.4%	1.2M	$293M
Point72 Asset Management, L.P. Hedge fund	−359K Sold out	0	—
Pacer Advisors, Inc.	−357K −70.9%	146K	$35.2M
Assenagon Asset Management S.A.	−299K −93.4%	21K	$5.1M
Wellington Management Group LLP Active manager	−279K −60.9%	179K	$43.2M
Renaissance Technologies LLC Hedge fund	−257K −31.4%	562K	$135M
Citadel Advisors LLC Hedge fund	−253K −20.1%	1.0M	$243M
Frontier Capital Management Co LLC Active manager	−240K −46.4%	277K	$66.8M
Sofinnova Investments, Inc.	−233K −38.9%	365K	$88M
Thompson Siegel & Walmsley LLC	−229K −97.8%	5,045	$1.2M
Jane Street Group, LLC	−219K −98.2%	4,118	$992,314
D. E. Shaw & Co., Inc. Hedge fund	−211K −70.8%	87K	$21M
SG Americas Securities, LLC	−191K −95.7%	8,553	$2.1M
Dimensional Fund Advisors LP	−182K −9.6%	1.7M	$413M
Goldentree Asset Management LP	−181K −38.1%	294K	$70.8M
Jefferies Financial Group Inc.	−176K Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Ecor1 Capital, LLC Hedge fund	−1.7M Sold out	0	—
Holocene Advisors, LP Hedge fund	−573K −78.1%	161K	$38.8M
Millennium Management LLC Hedge fund	−499K −39.5%	764K	$184M
Alyeska Investment Group, L.P. Hedge fund	−411K Sold out	0	—
Point72 Asset Management, L.P. Hedge fund	−359K Sold out	0	—
Wellington Management Group LLP Active manager	−279K −60.9%	179K	$43.2M
Renaissance Technologies LLC Hedge fund	−257K −31.4%	562K	$135M
Citadel Advisors LLC Hedge fund	−253K −20.1%	1.0M	$243M
Frontier Capital Management Co LLC Active manager	−240K −46.4%	277K	$66.8M
D. E. Shaw & Co., Inc. Hedge fund	−211K −70.8%	87K	$21M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Argent Capital Management LLC	200K	$48.2M
Woodline Partners LPHedge fund	150K	$36.2M
Longaeva Partners L.P.	69K	$16.6M
Distillate Capital Partners LLC	67K	$16.2M
Squarepoint Ops LLCHedge fund	53K	$12.8M
APG Asset Management N.V.	41K	$8.6M
John G Ullman & Associates Inc	33K	$7.9M
Ardsley Advisory Partners LP	30K	$7.2M
Integral Health Asset Management, LLC	30K	$7.2M
Css LLC	29K	$7M

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Ecor1 Capital, LLCHedge fund	1.7M	$323M
Alyeska Investment Group, L.P.Hedge fund	411K	$77.7M
Point72 Asset Management, L.P.Hedge fund	359K	$67.8M
Jefferies Financial Group Inc.	176K	$33.2M
Walleye Capital LLCHedge fund	87K	$16.5M
Diadema Partners LP	55K	$10.4M
Rokos Capital Management LLPHedge fund	52K	$9.8M
Cinctive Capital Management LPHedge fund	35K	$6.6M
Ikarian Capital, LLC	12K	$2.4M
Highvista Strategies LLC	11K	$2M

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 640
Ten largest holders: 44.6%
Index fund managers: 26.0%
Active managers and hedge funds: 32.2%

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	34	34	7	11	−1.1M	−5.1%
Index fund managers	10	2	0	0	+928K	+5.9%
Other institutions	323	206	119	45	−1.1M	−4.0%

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 Jazz Pharmaceuticals.

Only managers that filed a holdings report for both quarters are compared (689 here). 16 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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