Ken Griffin Surmodics Inc Transaction History

Citadel Advisors LLC

$618 Billion
Q3 2025

A detailed history of Ken Griffin (Citadel Advisors LLC) transactions in Surmodics Inc stock. As of the latest transaction made, Citadel Advisors LLC holds 365,110 shares of SRDX stock, worth $15.2 Million. This represents 0.0% of its overall portfolio holdings.

Number of Shares

365,110

Previous 62,353 485.55%

Holding current value

$15.2 Million

Previous $1.85 Million 489.25%

% of portfolio

0.0%

Previous 0.0%

31 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q3 2025 Nov 14, 2025	BUY	$29.0 - $38.0 $8.78 Million - $11.5 Million	302,757 Added 485.55%	365,110 $10.9 Million
Q2 2025 Aug 14, 2025	SELL	$26.76 - $31.1 $186,838 - $217,140	-6,982 Reduced 10.07%	62,353 $1.85 Million
Q1 2025 May 15, 2025	BUY	$26.71 - $39.71 $1.44 Million - $2.14 Million	53,962 Added 351.02%	69,335 $2.12 Million
Q4 2024 Feb 14, 2025	BUY	$37.5 - $40.13 $474,187 - $507,443	12,645 Added 463.53%	15,373 $608,000
Q3 2024 Nov 14, 2024	SELL	$38.47 - $42.24 $472,988 - $519,340	-12,295 Reduced 81.84%	2,728 $105,000

Q2 2024 Aug 14, 2024	SELL	$25.39 - $42.1 $952,810 - $1.58 Million	-37,527 Reduced 71.41%	15,023 $631,000
Q1 2024 May 15, 2024	BUY	$27.44 - $35.56 $739,288 - $958,057	26,942 Added 105.21%	52,550 $1.54 Million
Q4 2023 Feb 14, 2024	SELL	$28.47 - $38.49 $1.39 Million - $1.88 Million	-48,782 Reduced 65.58%	25,608 $930,000
Q3 2023 Nov 14, 2023	SELL	$28.28 - $38.36 $1.72 Million - $2.34 Million	-60,937 Reduced 45.03%	74,390 $2.39 Million
Q2 2023 Aug 14, 2023	BUY	$17.67 - $31.31 $460,692 - $816,314	26,072 Added 23.86%	135,327 $4.24 Million
Q1 2023 May 15, 2023	BUY	$17.13 - $38.52 $1.77 Million - $3.97 Million	103,184 Added 1699.62%	109,255 $2.49 Million
Q4 2022 Feb 14, 2023	SELL	$29.44 - $37.31 $104,747 - $132,748	-3,558 Reduced 36.95%	6,071 $207,000
Q3 2022 Nov 14, 2022	SELL	$28.84 - $38.92 $8,709 - $11,753	-302 Reduced 3.04%	9,629 $293,000
Q2 2022 Aug 15, 2022	BUY	$33.25 - $45.11 $19,318 - $26,208	581 Added 6.21%	9,931 $369,000
Q3 2021 Nov 15, 2021	SELL	$52.8 - $60.32 $641,836 - $733,249	-12,156 Reduced 56.52%	9,350 $520,000
Q2 2021 Aug 16, 2021	SELL	$51.29 - $59.15 $253,270 - $292,082	-4,938 Reduced 18.67%	21,506 $1.17 Million
Q1 2021 May 17, 2021	SELL	$42.18 - $56.07 $465,540 - $618,844	-11,037 Reduced 29.45%	26,444 $1.48 Million
Q4 2020 Feb 16, 2021	BUY	$35.18 - $43.52 $174,774 - $216,207	4,968 Added 15.28%	37,481 $1.63 Million
Q3 2020 Nov 16, 2020	BUY	$37.98 - $48.72 $775,703 - $995,057	20,424 Added 168.95%	32,513 $1.27 Million
Q2 2020 Aug 14, 2020	SELL	$31.07 - $44.74 $52,384 - $75,431	-1,686 Reduced 12.24%	12,089 $523,000
Q1 2020 May 15, 2020	SELL	$22.46 - $42.24 $547,350 - $1.03 Million	-24,370 Reduced 63.89%	13,775 $459,000
Q4 2019 Feb 14, 2020	SELL	$39.01 - $47.51 $652,442 - $794,604	-16,725 Reduced 30.48%	38,145 $1.58 Million
Q3 2019 Nov 14, 2019	BUY	$38.66 - $47.41 $925,636 - $1.14 Million	23,943 Added 77.42%	54,870 $2.51 Million
Q2 2019 Aug 14, 2019	SELL	$38.23 - $47.43 $1.96 Million - $2.44 Million	-51,348 Reduced 62.41%	30,927 $1.34 Million
Q1 2019 May 15, 2019	BUY	$41.26 - $58.35 $1.29 Million - $1.82 Million	31,167 Added 60.98%	82,275 $0
Q4 2018 Feb 14, 2019	BUY	$44.93 - $73.38 $1.2 Million - $1.97 Million	26,813 Added 110.36%	51,108 $2.42 Million
Q3 2018 Nov 13, 2018	BUY	$56.85 - $80.35 $517,789 - $731,827	9,108 Added 59.97%	24,295 $0
Q2 2018 Aug 10, 2018	BUY	$35.85 - $57.05 $544,453 - $866,418	15,187 New	15,187 $0
Q1 2018 May 11, 2018	SELL	$27.0 - $38.5 $392,256 - $559,328	-14,528 Closed	0 $0
Q4 2017 Feb 09, 2018	BUY	$28.0 - $33.2 $62,916 - $74,600	2,247 Added 18.3%	14,528 $407,000
Q3 2017 Nov 09, 2017	BUY	$24.5 - $31.1 $300,884 - $381,939	12,281	12,281 $381,000

Others Institutions Holding SRDX

# of Institutions

157

Shares Held

11.8M

Call Options Held

219K

Put Options Held

255K

View Full List

About SURMODICS INC

Ticker SRDX
Exchange NASDAQ
Sector Healthcare
Industry Medical Devices
Shares Outstandng 14,005,000
Market Cap $583M
Description
Surmodics, Inc., together with its subsidiaries, provides surface modification technologies for intravascular medical devices, and chemical components for in vitro diagnostic immunoassay tests and microarrays in the United States and internationally. It operates in two segments, Medical Device and In Vitro Diagnostics (IVD). The Medical Device s...

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