QSI Insider Trading

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Insider Trading History
Frequently Asked Questions
About

Insider Ownership Percentage: 30.04%

Insider Buying (Last 12 Months): $355,422.00

Insider Selling (Last 12 Months): $11,727,646.11

Quantum-Si Insider Trading History Chart

Quantum-Si Share Price & Price History

^$1.38

▲ +0.03 (2.22%)

As of 02/28/2025 05:00 PM ET

Days: 30 | 90 | 365

Quantum-Si Insider Trading History

Transaction Date	Insider Name	Title	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction
12/27/2024	Jonathan M Rothberg	Director	Sell	3,506,267	$3.34	$11,710,931.78	1,250,000
12/23/2024	John S Vieceli	Insider	Sell	4,306	$1.29	$5,554.74	160,493
9/23/2024	John S Vieceli	Insider	Sell	2,192	$0.95	$2,082.40	166,916
8/12/2024	Charles R Kummeth	Director	Buy	31,100	$0.89	$27,679.00	355,000
8/9/2024	Charles R Kummeth	Director	Buy	138,900	$0.87	$120,843.00	323,900
8/9/2024	Christian LaPointe	General Counsel	Buy	25,000	$0.86	$21,500.00	571,710
8/9/2024	Jeffry R Keyes	CFO	Buy	50,000	$0.87	$43,500.00	446,820
6/24/2024	Grace Johnston	Insider	Sell	3,169	$1.20	$3,802.80	295,940
6/21/2024	Grace Johnston	Insider	Sell	4,359	$1.21	$5,274.39	299,109
3/15/2024	Christian LaPointe	General Counsel	Buy	10,000	$1.74	$17,400.00	257,693
3/14/2024	Jeffrey Alan Hawkins	CEO	Buy	25,000	$1.76	$44,000.00	25,000
3/5/2024	Jeffry R Keyes	CFO	Buy	50,000	$1.61	$80,500.00	50,000
3/15/2023	Christian LaPointe	General Counsel	Buy	20,000	$1.77	$35,400.00	247,693
8/17/2022	Christian LaPointe	General Counsel	Buy	20,000	$3.93	$78,600.00	227,693
6/14/2022	Jonathan M Rothberg	CEO	Buy	25,561	$3.10	$79,239.10	2,568,443
6/13/2022	Matthew Dyer	Insider	Sell	1,622	$3.22	$5,222.84	333,393
6/13/2022	Michael P Mckenna	EVP	Sell	1,648	$3.22	$5,306.56	869,021
3/14/2022	Matthew Dyer	Insider	Sell	6,478	$4.01	$25,976.78
3/14/2022	Michael P Mckenna	COO	Sell	6,581	$4.01	$26,389.81

See Full Table

SEC Filings (Institutional Ownership Changes) for Quantum-Si (NASDAQ:QSI)

39.90% of Quantum-Si stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

Quantum-Si Institutional Trading History

Reporting Date	Hedge Fund	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
2/18/2025	Alpine Global Management LLC	13,785	$37K	0.0%	N/A	0.010%
2/17/2025	Two Sigma Investments LP	152,683	$0.41M	0.0%	N/A	0.107%
2/17/2025	Shay Capital LLC	216,546	$0.59M	0.1%	+56.7%	0.152%
2/17/2025	ProShare Advisors LLC	28,204	$76K	0.0%	+49.0%	0.020%
2/17/2025	Nuveen Asset Management LLC	319,100	$0.86M	0.0%	-43.5%	0.224%
2/17/2025	Cetera Investment Advisers	13,380	$36K	0.0%	N/A	0.009%
2/17/2025	Centiva Capital LP	143,176	$0.39M	0.0%	N/A	0.100%
2/17/2025	Bridgeway Capital Management LLC	296,100	$0.80M	0.0%	-27.2%	0.207%
2/17/2025	Balyasny Asset Management L.P.	13,488	$36K	0.0%	N/A	0.009%
2/17/2025	Bank of America Corp DE	111,871	$0.30M	0.0%	+13.4%	0.078%
2/17/2025	BNP Paribas Financial Markets	19,025	$51K	0.0%	N/A	0.013%
2/14/2025	Mercer Global Advisors Inc. ADV	30,959	$84K	0.0%	N/A	0.022%
2/14/2025	Northern Trust Corp	841,146	$2.27M	0.0%	+5.0%	0.589%
2/14/2025	The Manufacturers Life Insurance Company	34,850	$94K	0.0%	N/A	0.024%
2/14/2025	Voya Investment Management LLC	30,863	$83K	0.0%	-15.4%	0.022%
2/14/2025	Price T Rowe Associates Inc. MD	109,114	$0.30M	0.0%	+12.1%	0.076%
2/14/2025	Alpine Global Management LLC	13,785	$37K	0.0%	N/A	0.010%
2/14/2025	Tower Research Capital LLC TRC	23,347	$63K	0.0%	+139.3%	0.016%
2/13/2025	Jump Financial LLC	12,385	$33K	0.0%	N/A	0.009%
2/13/2025	Guggenheim Capital LLC	199,999	$0.54M	0.0%	-17.5%	0.140%
2/13/2025	XTX Topco Ltd	245,585	$0.66M	0.1%	+460.5%	0.172%
2/13/2025	Mariner LLC	33,439	$90K	0.0%	+29.1%	0.023%
2/13/2025	Barclays PLC	150,616	$0.41M	0.0%	-23.5%	0.106%
2/13/2025	Renaissance Technologies LLC	544,956	$1.47M	0.0%	+1,211.4%	0.382%
2/13/2025	Wells Fargo & Company MN	71,980	$0.19M	0.0%	+13.9%	0.050%
2/12/2025	Thoroughbred Financial Services LLC	33,000	$89K	0.0%	N/A	0.023%
2/12/2025	Geode Capital Management LLC	2,368,376	$6.40M	0.0%	+2.2%	1.660%
2/12/2025	IQ EQ FUND MANAGEMENT IRELAND Ltd	33,902	$92K	0.0%	+29.4%	0.024%
2/12/2025	WINTON GROUP Ltd	34,610	$93K	0.0%	N/A	0.024%
2/11/2025	Dudley Capital Management LLC	11,000	$30K	0.0%	N/A	0.008%
2/11/2025	AXQ Capital LP	34,067	$92K	0.0%	N/A	0.024%
2/10/2025	Nikko Asset Management Americas Inc.	5,965,208	$16.05M	0.2%	-20.8%	4.180%
2/10/2025	Commonwealth Equity Services LLC	31,013	$84K	0.0%	+46.7%	0.022%
2/6/2025	Charles Schwab Investment Management Inc.	308,021	$0.83M	0.0%	+32.6%	0.216%
2/6/2025	Bravias Capital Group LLC	20,250	$55K	0.0%	N/A	0.014%
2/6/2025	SBI Securities Co. Ltd.	22,261	$60K	0.0%	N/A	0.016%
2/4/2025	ARK Investment Management LLC	8,848,650	$23.89M	0.2%	-25.3%	6.200%
2/4/2025	Bank of New York Mellon Corp	269,807	$0.73M	0.0%	+21.3%	0.189%
2/3/2025	Wolverine Asset Management LLC	9,632	$26K	0.0%	N/A	0.007%
1/31/2025	Sanctuary Advisors LLC	35,243	$95K	0.0%	N/A	0.025%
1/30/2025	Rhumbline Advisers	148,946	$0.40M	0.0%	+3.7%	0.104%
1/28/2025	Sumitomo Mitsui Trust Group Inc.	5,965,208	$16.11M	0.0%	-21.0%	4.180%
1/23/2025	Abel Hall LLC	10,432	$28K	0.0%	N/A	0.007%
1/17/2025	SG Americas Securities LLC	67,588	$0.18M	0.0%	+12.4%	0.047%
1/13/2025	Green Alpha Advisors LLC	158,858	$0.43M	0.3%	-9.3%	0.111%
11/19/2024	Barclays PLC	196,826	$0.17M	0.0%	+210.5%	0.138%
11/16/2024	Geode Capital Management LLC	2,316,921	$2.04M	0.0%	+6.7%	1.627%
11/15/2024	Barclays PLC	196,826	$0.17M	0.0%	+210.5%	0.138%
11/15/2024	XTX Topco Ltd	43,812	$39K	0.0%	+81.3%	0.031%
11/15/2024	Jane Street Group LLC	256,689	$0.23M	0.0%	-15.6%	0.180%
11/15/2024	State Street Corp	2,269,038	$2M	0.0%	-4.3%	1.594%
11/12/2024	Charles Schwab Investment Management Inc.	232,360	$0.21M	0.0%	-10.8%	0.163%
11/5/2024	Sumitomo Mitsui Trust Group Inc.	7,547,912	$6.66M	0.0%	-4.0%	5.302%
11/5/2024	GSA Capital Partners LLP	112,317	$99K	0.0%	-38.4%	0.079%
10/31/2024	ARK Investment Management LLC	11,842,609	$10.45M	0.1%	-4.6%	8.319%
10/7/2024	Green Alpha Advisors LLC	175,055	$0.15M	0.1%	+35.4%	0.123%
10/3/2024	SG Americas Securities LLC	60,118	$53K	0.0%	N/A	0.042%
8/12/2024	XTX Topco Ltd	24,161	$25K	0.0%	N/A	0.017%
7/26/2024	ARK Investment Management LLC	12,409,929	$13.03M	0.1%	-2.8%	8.750%
7/26/2024	Bank of New York Mellon Corp	322,460	$0.34M	0.0%	+3.5%	0.227%
7/19/2024	Sumitomo Mitsui Trust Holdings Inc.	7,863,161	$8.26M	0.0%	-2.4%	5.544%
7/10/2024	Neumann Advisory Hong Kong Ltd	33,803	$35K	0.0%	-79.7%	0.024%
5/20/2024	Virtu Financial LLC	49,988	$98K	0.0%	N/A	0.035%
5/16/2024	Jacobs Levy Equity Management Inc.	506,697	$1M	0.0%	N/A	0.357%
5/15/2024	Public Employees Retirement System of Ohio	13,800	$27K	0.0%	N/A	0.010%
5/15/2024	Price T Rowe Associates Inc. MD	59,727	$0.12M	0.0%	+11.1%	0.042%
5/10/2024	Vanguard Group Inc.	5,300,685	$10.44M	0.0%	+1.6%	3.739%
5/8/2024	Bleakley Financial Group LLC	14,090	$28K	0.0%	N/A	0.010%
5/3/2024	Nikko Asset Management Americas Inc.	8,054,503	$15.71M	0.2%	-5.6%	5.681%
4/24/2024	Simplicity Wealth LLC	14,090	$28K	0.0%	N/A	0.010%
4/19/2024	Sumitomo Mitsui Trust Holdings Inc.	8,054,503	$15.87M	0.0%	-5.6%	5.681%
2/14/2024	TIG Advisors LLC	82,577	$0.17M	0.0%	N/A	0.058%
2/13/2024	General American Investors Co. Inc.	294,350	$0.59M	0.0%	+146.8%	0.208%
1/30/2024	Cookson Peirce & Co. Inc.	50,000	$0.10M	0.0%	N/A	0.035%
1/29/2024	Round Rock Advisors LLC	13,935	$28K	0.0%	-36.3%	0.010%
1/17/2024	ARK Investment Management LLC	15,519,322	$31.19M	0.2%	+7.4%	10.950%
1/12/2024	SG Americas Securities LLC	17,341	$35K	0.0%	-62.8%	0.012%
1/5/2024	Green Alpha Advisors LLC	131,785	$0.27M	0.2%	+209.2%	0.093%
11/14/2023	Knollwood Investment Advisory LLC	300,000	$0.50M	0.2%	N/A	0.212%
11/13/2023	WINTON GROUP Ltd	62,058	$0.10M	0.0%	N/A	0.044%
11/8/2023	State Board of Administration of Florida Retirement System	35,636	$59K	0.0%	N/A	0.025%
11/8/2023	Pathstone Family Office LLC	26,039	$43K	0.0%	N/A	0.018%
10/30/2023	Sumitomo Mitsui Trust Holdings Inc.	8,532,917	$14.17M	0.0%	+424.5%	6.021%
10/24/2023	Bank of New York Mellon Corp	346,956	$0.58M	0.0%	-2.5%	0.245%
10/23/2023	Commonwealth Equity Services LLC	16,774	$28K	0.0%	N/A	0.012%
10/18/2023	ARK Investment Management LLC	14,448,217	$23.98M	0.2%	+13.3%	10.195%
10/13/2023	SG Americas Securities LLC	46,566	$77K	0.0%	N/A	0.033%
10/12/2023	Neumann Advisory Hong Kong Ltd	166,198	$0.28M	0.1%	-13.8%	0.117%
10/10/2023	Green Alpha Advisors LLC	42,622	$71K	0.1%	N/A	0.030%
9/21/2023	Barclays PLC	49,777	$89K	0.0%	-34.6%	0.035%
8/14/2023	Shay Capital LLC	83,698	$0.15M	0.0%	N/A	0.059%
8/11/2023	Guggenheim Capital LLC	709,035	$1.27M	0.0%	+14.9%	0.501%
8/7/2023	Principal Financial Group Inc.	41,696	$75K	0.0%	+32.2%	0.029%
8/4/2023	American International Group Inc.	48,349	$87K	0.0%	+9.7%	0.034%
7/31/2023	Sumitomo Mitsui Trust Holdings Inc.	1,626,985	$2.91M	0.0%	+44.7%	1.150%
7/10/2023	ARK Investment Management LLC	12,754,531	$22.83M	0.2%	+9.0%	9.014%
6/1/2023	Prelude Capital Management LLC	19,347	$34K	0.0%	+59.4%	0.014%
5/16/2023	Glenview Capital Management LLC	4,215,990	$7.42M	0.2%	-0.8%	3.013%
5/15/2023	Security Benefit Life Insurance Co. KS	715,479	$1.26M	0.1%	-82.8%	0.511%
5/10/2023	Connor Clark & Lunn Investment Management Ltd.	23,999	$42K	0.0%	N/A	0.017%

Data available starting January 2016

See Full Table

Quantum-Si incorporated, a life sciences company, engages in the development of single-molecule detection platform to enable Next Generation Protein Sequencing (NGPS). The company's platform is comprised of the Platinum NGPS instrument; the Platinum Analysis Software service; and reagent kits and semiconductor chips for use with its instruments. It is used in protein identification, protein variants, antibody characterization, biomarker identification, and post translational modification analysis applications. The company was founded in 2013 is headquartered in Branford, Connecticut.

Today's Range

Now: $1.38

$1.28

$1.42

50 Day Range

MA: $2.23

$1.30

$4.29

52 Week Range

Now: $1.38

$0.61

$5.77

Volume

6,672,319 shs

Average Volume

24,161,191 shs

Market Capitalization

$196.94 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

2.7

Who are the company insiders with the largest holdings of Quantum-Si?: Quantum-Si's top insider investors include:
Jonathan M Rothberg (Director)
Christian Lapointe (General Counsel)
Jeffry R Keyes (CFO)
Charles R Kummeth (Director)
Grace Johnston (Insider)
John S Vieceli (Insider)
Jeffrey Alan Hawkins (CEO)
Learn More about top insider investors at Quantum-Si.
Who are the major institutional investors of Quantum-Si?: Quantum-Si's top institutional investors include:
ARK Investment Management LLC — 6.20%
Sumitomo Mitsui Trust Group Inc. — 4.18%
Nikko Asset Management Americas Inc. — 4.18%
Geode Capital Management LLC — 1.66%
Northern Trust Corp — 0.59%
Renaissance Technologies LLC — 0.38%
Learn More about top institutional investors of Quantum-Si stock.
Which major investors are selling Quantum-Si stock?: In the last quarter, QSI stock was sold by these institutional investors:
ARK Investment Management LLC
Sumitomo Mitsui Trust Group Inc.
Nikko Asset Management Americas Inc.
Nuveen Asset Management LLC
Bridgeway Capital Management LLC
Barclays PLC
Guggenheim Capital LLC
Green Alpha Advisors LLC
In the last year, company insiders that have sold Quantum-Si company stock include:
Jonathan M Rothberg (Director)
Christian Lapointe (General Counsel)
Jeffry R Keyes (CFO)
Learn More investors selling Quantum-Si stock.
Which major investors are buying Quantum-Si stock?: During the previous quarter, QSI stock was acquired by institutional investors including:
Renaissance Technologies LLC
Citadel Advisors LLC
XTX Topco Ltd
Susquehanna International Group LLP
Two Sigma Investments LP
Centiva Capital LP
Simplex Trading LLC
Group One Trading LLC
During the previous year, these company insiders have bought Quantum-Si stock:
Jonathan M Rothberg (Director)
Christian Lapointe (General Counsel)
Jeffry R Keyes (CFO)
Charles R Kummeth (Director)
Learn More investors buying Quantum-Si stock.