There is a long list of 378 institutional holders of IONS within the last two holding periods in our database of 13F filers, so we've sorted through to present to you just the top 50 institutional holders of IONS by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-IONS table below, the initial column indicates the name of each top institutional holder of IONS, with a link to that fund's top holdings. The next columns indicate the amount of IONS stock held by each of the institutional holders of IONS, followed by the IONS position size held by the institution, and finally the date of the quarterly 13F filing period the holdings data represents for that institution.

Holder	Amount	Position Size ($ in 1000's)	As of
Steelhead Partners LLC		$58,672,629	12/31/2023
NOTE 4 0	55,490,000	$58,672,629	12/31/2023
FMR LLC	21,520,872	$1,088,741	12/31/2023
IONS	21,520,872	$1,088,741	12/31/2023
Vanguard Group Inc.	14,203,481	$718,554	12/31/2023
IONS	14,203,481	$718,554	12/31/2023
T. Rowe Price Investment Management Inc.	13,201,453	$667,862	12/31/2023
IONS	13,201,453	$667,862	12/31/2023
BlackRock Inc.		$482,692	12/31/2023
IONS	9,057,530	$458,220	12/31/2023
NOTE 4 0	23,262,000	$24,472	12/31/2023
Bellevue Group AG	8,713,987	$440,841	12/31/2023
IONS	8,713,987	$440,841	12/31/2023
Clearbridge Investments LLC	4,707,480	$238,151	12/31/2023
IONS	4,707,480	$238,151	12/31/2023
Wellington Management Group LLP	4,616,978	$233,573	12/31/2023
IONS	4,616,978	$233,573	12/31/2023
State Street Corp		$217,658	12/31/2023
IONS	4,008,797	$202,805	12/31/2023
NOTE 4 0	14,075,000	$14,853	12/31/2023
Price T Rowe Associates Inc. MD	4,255,074	$215,265	12/31/2023
IONS	4,255,074	$215,265	12/31/2023
Pictet Asset Management Holding SA	3,518,317	$177,992	12/31/2023
IONS	3,518,317	$177,992	12/31/2023
Tweedy Browne Co LLC	3,454,676	$174,772	12/31/2023
IONS	3,454,676	$174,772	12/31/2023
Macquarie Group Ltd.		$160,008	12/31/2023
IONS	3,088,235	$156,234	12/31/2023
NOTE 0	3,903,000	$3,774	12/31/2023
BVF Inc. IL	2,428,613	$122,864	12/31/2023
IONS	2,428,613	$122,864	12/31/2023
Geode Capital Management LLC	2,275,931	$115,158	12/31/2023
IONS	2,275,931	$115,158	12/31/2023
Orbimed Advisors LLC	2,064,797	$104,458	12/31/2023
IONS	2,064,797	$104,458	12/31/2023
Farallon Capital Management LLC	1,555,020	$78,668	12/31/2023
IONS	1,555,020	$78,668	12/31/2023
Adage Capital Partners GP L.L.C.	1,385,300	$70,082	12/31/2023
IONS	1,385,300	$70,082	12/31/2023
Morgan Stanley		$68,196	12/31/2023
IONS	1,090,263	$55,156	12/31/2023
NOTE 4 0	6,350,000	$6,675	12/31/2023
NOTE 0	6,735,000	$6,365	12/31/2023
Citadel Advisors LLC		$67,840	12/31/2023
NOTE 4 0	50,880,000	$53,720	12/31/2023
IONS	252,528	$12,775	12/31/2023
Call	46,400	$2,347	12/31/2023
Put	19,800	$1,002	12/31/2023
Charles Schwab Investment Management Inc.	1,275,319	$64,518	12/31/2023
IONS	1,275,319	$64,518	12/31/2023
Deep Track Capital LP	1,249,068	$63,190	12/31/2023
IONS	1,249,068	$63,190	12/31/2023
ARK Investment Management LLC	1,399,852	$60,684	03/31/2024
IONS	1,399,852	$60,684	03/31/2024
Norges Bank	1,171,936	$59,288	12/31/2023
IONS	1,171,936	$59,288	12/31/2023
First Trust Advisors LP	1,097,730	$55,534	12/31/2023
IONS	1,097,730	$55,534	12/31/2023
Wells Fargo & Company MN		$52,656	12/31/2023
IONS	594,250	$30,063	12/31/2023
NOTE 4 0	20,237,000	$21,348	12/31/2023
NOTE 0	1,314,000	$1,245	12/31/2023
Point72 Asset Management L.P.	968,800	$49,012	12/31/2023
IONS	968,800	$49,012	12/31/2023
Lazard Asset Management LLC		$48,674	12/31/2023
Bond 30 360P2 U	45,733,000	$48,339	12/31/2023
IONS	6,641	$335	12/31/2023
TD Asset Management Inc.	956,852	$48,407	12/31/2023
IONS	956,852	$48,407	12/31/2023
JPMorgan Chase & Co.		$47,607	12/31/2023
IONS	941,032	$47,607	12/31/2023
Put	30,000	$1,518	12/31/2023
Call	30,000	$1,518	12/31/2023
Millennium Management LLC	890,325	$45,042	12/31/2023
IONS	890,325	$45,042	12/31/2023
Camber Capital Management LP	865,000	$43,760	12/31/2023
IONS	865,000	$43,760	12/31/2023
Royal Bank of Canada		$42,947	12/31/2023
IONS	774,246	$39,169	12/31/2023
NOTE	3,568,000	$3,753	12/31/2023
Call	500	$25	12/31/2023
Capital World Investors	839,463	$42,468	12/31/2023
IONS	839,463	$42,468	12/31/2023
Two Sigma Investments LP	801,448	$40,545	12/31/2023
IONS	801,448	$40,545	12/31/2023
Two Sigma Advisers LP	777,011	$39,309	12/31/2023
IONS	777,011	$39,309	12/31/2023
Sonora Investment Management Group LLC		$37,076	12/31/2023
NOTE 0	16,978,000	$16,202	12/31/2023
NOTE 4 0	12,643,000	$13,319	12/31/2023
IONS	149,338	$7,555	12/31/2023
Northern Trust Corp	687,986	$34,805	12/31/2023
IONS	687,986	$34,805	12/31/2023
Barclays PLC		$34,638	12/31/2023
IONS	644,508	$32,606	12/31/2023
Put	55,000	$2,782	12/31/2023
Call	55,000	$2,782	12/31/2023
BOND	1,926,000	$2,032	12/31/2023
TENOR CAPITAL MANAGEMENT Co. L.P.		$33,784	12/31/2023
NOTE 4 0	32,000,000	$33,784	12/31/2023
BNP Paribas Arbitrage SA		$33,737	12/31/2023
IONS	354,955	$17,957	12/31/2023
Bond	15,000,000	$15,780	12/31/2023
CSS LLC IL		$33,726	12/31/2023
NOTE 4 0	31,931,000	$33,726	12/31/2023
Candriam Luxembourg S.C.A.	629,067	$31,826	12/31/2023
IONS	629,067	$31,826	12/31/2023
AXA S.A.		$30,490	12/31/2023
IONS	464,741	$23,511	12/31/2023
NOTE 4 0	6,600,000	$6,979	12/31/2023
Nuveen Asset Management LLC		$26,503	12/31/2023
IONS	324,006	$16,391	12/31/2023
NOTE 4 0	9,612,000	$10,112	12/31/2023
Bank of New York Mellon Corp		$26,091	03/31/2024
IONS	583,589	$25,299	03/31/2024
NOTE	800,000	$792	03/31/2024
Jacobs Levy Equity Management Inc.	509,533	$25,777	12/31/2023
IONS	509,533	$25,777	12/31/2023
Nomura Holdings Inc.	489,189	$24,748	12/31/2023
IONS	489,189	$24,748	12/31/2023
Pinnacle Associates Ltd.		$23,487	12/31/2023
IONS	458,979	$23,220	12/31/2023
NOTE 0	280,000	$267	12/31/2023
Bank of America Corp DE	455,078	$23,022	12/31/2023
IONS	455,078	$23,022	12/31/2023

See All: Funds Holding IONS
See Details: Top 10 Hedge Funds Holding IONS
Also See: IONS Holdings Changes

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