There is a long list of 119 institutional holders of SRDX 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 SRDX by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-SRDX table below, the initial column indicates the name of each top institutional holder of SRDX, with a link to that fund's top holdings. The next columns indicate the amount of SRDX stock held by each of the institutional holders of SRDX, followed by the SRDX 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
Trigran Investments Inc.	2,358,300	$85,724	12/31/2023
SRDX	2,358,300	$85,724	12/31/2023
Morgan Stanley	1,241,793	$45,139	12/31/2023
SRDX	1,241,793	$45,139	12/31/2023
BlackRock Inc.	1,080,288	$39,268	12/31/2023
SRDX	1,080,288	$39,268	12/31/2023
Vanguard Group Inc.	859,287	$31,235	12/31/2023
SRDX	859,287	$31,235	12/31/2023
Soleus Capital Management L.P.	771,700	$28,051	12/31/2023
SRDX	771,700	$28,051	12/31/2023
Millennium Management LLC	671,551	$24,411	12/31/2023
SRDX	671,551	$24,411	12/31/2023
Disciplined Growth Investors Inc. MN	614,891	$22,351	12/31/2023
SRDX	614,891	$22,351	12/31/2023
Renaissance Technologies LLC	584,138	$21,233	12/31/2023
SRDX	584,138	$21,233	12/31/2023
Royce & Associates LP	420,412	$15,282	12/31/2023
SRDX	420,412	$15,282	12/31/2023
Segall Bryant & Hamill LLC	404,170	$14,692	12/31/2023
SRDX	404,170	$14,692	12/31/2023
Dimensional Fund Advisors LP	375,899	$13,664	12/31/2023
SRDX	375,899	$13,664	12/31/2023
Acadian Asset Management LLC	367,162	$13,340	12/31/2023
SRDX	367,162	$13,340	12/31/2023
Geode Capital Management LLC	299,269	$10,880	12/31/2023
SRDX	299,269	$10,880	12/31/2023
State Street Corp	293,314	$10,662	12/31/2023
SRDX	293,314	$10,662	12/31/2023
Bank of America Corp DE	251,154	$9,129	12/31/2023
SRDX	251,154	$9,129	12/31/2023
Kennedy Capital Management Inc.	139,347	$5,065	12/31/2023
SRDX	139,347	$5,065	12/31/2023
Northern Trust Corp	137,224	$4,988	12/31/2023
SRDX	137,224	$4,988	12/31/2023
Jacobs Levy Equity Management Inc.	127,965	$4,652	12/31/2023
SRDX	127,965	$4,652	12/31/2023
Deutsche Bank AG	119,132	$4,330	12/31/2023
SRDX	119,132	$4,330	12/31/2023
Charles Schwab Investment Management Inc.	110,493	$4,016	12/31/2023
SRDX	110,493	$4,016	12/31/2023
Salem Investment Counselors Inc.	121,000	$3,550	03/31/2024
SRDX	121,000	$3,550	03/31/2024
Nuveen Asset Management LLC	88,879	$3,231	12/31/2023
SRDX	88,879	$3,231	12/31/2023
Granite Investment Partners LLC	73,265	$2,663	12/31/2023
SRDX	73,265	$2,663	12/31/2023
Gamco Investors INC. ET AL	72,300	$2,628	12/31/2023
SRDX	72,300	$2,628	12/31/2023
Rice Hall James & Associates LLC	69,576	$2,529	12/31/2023
SRDX	69,576	$2,529	12/31/2023
Russell Investments Group Ltd.	67,845	$2,466	12/31/2023
SRDX	67,845	$2,466	12/31/2023
Susquehanna International Group LLP	63,455	$2,307	12/31/2023
SRDX	63,455	$2,307	12/31/2023
Royal Bank of Canada	60,931	$2,215	12/31/2023
SRDX	60,931	$2,215	12/31/2023
Sei Investments Co.	55,441	$2,015	12/31/2023
SRDX	55,441	$2,015	12/31/2023
Bank of New York Mellon Corp	53,946	$1,961	12/31/2023
SRDX	53,946	$1,961	12/31/2023
Gabelli Funds LLC	52,700	$1,916	12/31/2023
SRDX	52,700	$1,916	12/31/2023
Marshall Wace LLP	52,554	$1,910	12/31/2023
SRDX	52,554	$1,910	12/31/2023
Ameriprise Financial Inc.	50,805	$1,847	12/31/2023
SRDX	50,805	$1,847	12/31/2023
D. E. Shaw & Co. Inc.	50,298	$1,828	12/31/2023
SRDX	50,298	$1,828	12/31/2023
Goldman Sachs Group Inc.	50,199	$1,825	12/31/2023
SRDX	50,199	$1,825	12/31/2023
Panagora Asset Management Inc.	44,664	$1,624	12/31/2023
SRDX	44,664	$1,624	12/31/2023
White Pine Capital LLC	41,343	$1,503	12/31/2023
SRDX	41,343	$1,503	12/31/2023
Two Sigma Advisers LP	38,630	$1,404	12/31/2023
SRDX	38,630	$1,404	12/31/2023
FMR LLC	35,107	$1,276	12/31/2023
SRDX	35,107	$1,276	12/31/2023
Teton Advisors Inc.	33,500	$1,218	12/31/2023
SRDX	33,500	$1,218	12/31/2023
Norges Bank	31,600	$1,149	12/31/2023
SRDX	31,600	$1,149	12/31/2023
HRT Financial LP	30,650	$1,114	12/31/2023
SRDX	30,650	$1,114	12/31/2023
Arrowstreet Capital Limited Partnership	29,316	$1,066	12/31/2023
SRDX	29,316	$1,066	12/31/2023
Los Angeles Capital Management & Equity Research Inc.	35,204	$1,033	03/31/2024
SRDX	35,204	$1,033	03/31/2024
AQR Capital Management LLC	25,881	$941	12/31/2023
SRDX	25,881	$941	12/31/2023
Assenagon Asset Management S.A.	24,333	$885	12/31/2023
SRDX	24,333	$885	12/31/2023
Trexquant Investment LP	23,047	$838	12/31/2023
SRDX	23,047	$838	12/31/2023
Citadel Advisors LLC		$804	12/31/2023
SRDX	25,608	$931	12/31/2023
Put	3,600	$131	12/31/2023
Call	100	$4	12/31/2023
Barclays PLC	18,909	$687	12/31/2023
SRDX	18,909	$687	12/31/2023
Rhumbline Advisers	17,823	$648	12/31/2023
SRDX	17,823	$648	12/31/2023