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Aptose Biosciences (APTO) Institutional Ownership

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Institutional Ownership Changes (13F Filings) for Aptose Biosciences (NASDAQ:APTO)

Current
Institutional Ownership
Percentage
26.62%
Number of
Institutional Buyers
(last 12 months)
3
Total
Institutional Inflows
(last 12 months)
$60.00M
Number of
Institutional Sellers
(last 12 months)
0
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APTO Institutional Buying and Selling by Quarter

Aptose Biosciences Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
2/17/2025Bleichroeder LP2,500,000$563K0.1%N/A4.154%
2/3/2025Sigma Planning Corp703,384$158K0.0%+75.1%1.169%
11/4/2024Sigma Planning Corp401,750$165K0.0%+71.3%2.220%
8/15/2024Armistice Capital LLC1,713,000$1.30M0.0%N/A9.459%
2/8/2024Texas Capital Bank Wealth Management Services Inc12,448$32K0.0%N/A0.157%
2/1/2024Sigma Planning Corp75,477$192K0.0%-48.2%0.951%
11/15/2023Annandale Capital LLC74,666$209K0.1%+40.0%0.990%
11/6/2023Sigma Planning Corp145,786$408K0.0%N/A1.934%
8/10/2023Carlson Capital L P106,666$495K0.0%-93.5%0.114%
7/28/2023Voss Capital LLC14,634$68K0.0%-97.3%0.016%
5/8/2023Sigma Planning Corp1,444,550$925K0.0%+34.9%1.562%
2/15/2023Nantahala Capital Management LLC6,052,867$3.51M0.2%-12.1%6.553%
2/13/2023Callan Capital LLC156,986$91K0.0%N/A0.170%
2/13/2023Voss Capital LLC550,000$319K0.1%-8.3%0.595%
2/7/2023Formidable Asset Management LLC90,000$52K0.0%N/A0.097%
1/24/2023Sigma Planning Corp1,070,504$621K0.0%+19.0%1.160%
11/15/2022Carlson Capital L P2,010,000$1.20M0.1%+5.4%2.178%
11/14/2022Annandale Capital LLC710,000$422K0.2%+81.6%0.769%
11/10/2022Sigma Planning Corp899,554$535K0.0%+6.8%0.975%
11/10/2022Nantahala Capital Management LLC6,888,822$4.10M0.3%-4.8%7.464%
11/9/2022Toronto Dominion Bank43,851$26K0.0%+80.4%0.048%
11/2/2022Voss Capital LLC600,000$357K0.1%-14.3%0.650%
10/7/2022Sanders Morris Harris LLC657,364$395K0.1%-35.8%0.712%
8/15/2022Nantahala Capital Management LLC7,232,676$5.37M0.3%-1.2%7.837%
8/13/2022Voss Capital LLC700,010$519K0.2%+27.3%0.759%
8/11/2022Sigma Planning Corp842,174$625K0.0%+6.4%0.913%
7/11/2022Sanders Morris Harris LLC1,024,215$812K0.2%-56.3%1.110%
5/12/2022Annandale Capital LLC200,000$272K0.1%N/A0.217%
5/12/2022Cetera Advisors LLC60,895$83K0.0%+87.7%0.066%
5/9/2022Toronto Dominion Bank50,186$68K0.0%+76.6%0.054%
5/4/2022Formidable Asset Management LLC90,000$122K0.0%N/A0.098%
4/22/2022Gleason Group Inc.18,250$25K0.0%N/A0.020%
4/20/2022Sigma Planning Corp791,274$1.08M0.0%+39.5%0.858%
4/11/2022Sanders Morris Harris LLC2,342,694$3.19M0.6%+19.4%2.540%
2/15/2022683 Capital Management LLC2,019,770$2.73M0.1%-35.1%2.190%
2/14/2022Bayesian Capital Management LP37,800$51K0.0%N/A0.041%
2/14/2022Rockefeller Capital Management L.P.21,809$29K0.0%+1,334.8%0.024%
2/10/2022WealthShield Partners LLC104,920$142K0.0%+40.8%0.114%
2/10/2022P.A.W. Capital Corp565,000$763K0.7%-24.7%0.613%
2/9/2022BNP Paribas Arbitrage SA686,058$926K0.0%+101.4%0.744%
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2/7/2022Texas Capital Bank Wealth Management Services Inc.25,000$34K0.0%N/A0.027%
2/4/2022Toronto Dominion Bank28,410$38K0.0%+1,070.1%0.031%
2/2/2022Sanders Morris Harris LLC1,961,594$2.92M0.5%+42.8%2.127%
2/2/2022Sigma Planning Corp567,314$766K0.0%+10.7%0.615%
11/24/2021Patriot Financial Group Insurance Agency LLC54,529$119K0.0%-66.2%0.061%
11/16/2021Opaleye Management Inc.549,000$1.20M0.2%-44.0%0.617%
11/16/2021Voss Capital LLC67,600$147K0.1%-83.9%0.076%
11/16/2021Squarepoint Ops LLC15,483$34K0.0%N/A0.017%
11/16/2021Two Sigma Investments LP218,633$477K0.0%N/A0.246%
11/15/2021Man Group plc260,836$569K0.0%+77.0%0.293%
11/15/2021683 Capital Management LLC3,112,737$6.79M0.3%+42.1%3.499%
11/12/2021Renaissance Technologies LLC723,005$1.58M0.0%N/A0.813%
11/12/2021Carlson Capital L P720,408$1.57M0.1%+41.3%0.810%
11/12/2021Gagnon Securities LLC59,380$129K0.0%-45.8%0.067%
11/12/2021Jump Financial LLC105,202$229K0.0%+11.3%0.118%
11/12/2021Prosight Management LP70,563$154K0.1%-46.9%0.079%
11/12/2021WealthShield Partners LLC74,512$162K0.0%+83.0%0.084%
11/10/2021Goldman Sachs Group Inc.751,802$1.64M0.0%+12.5%0.845%
11/2/2021Raymond James & Associates20,150$44K0.0%-27.1%0.023%
11/2/2021Benjamin F. Edwards & Company Inc.20,000$44K0.0%+150.0%0.022%
10/28/2021Sigma Planning Corp512,519$1.12M0.0%+34.9%0.576%
10/25/2021P.A.W. Capital Corp750,000$1.64M1.5%+7.1%0.843%
10/13/2021Sanders Morris Harris LLC1,373,794$3.08M0.6%+45.3%1.544%
10/7/2021Newman Dignan & Sheerar Inc.12,915$28K0.0%N/A0.015%
8/17/2021Woodline Partners LP235,005$780K0.0%-89.4%0.264%
8/17/2021Millennium Management LLC315,293$1.05M0.0%-13.7%0.354%
8/17/2021Man Group plc147,380$489K0.0%-24.0%0.166%
8/17/2021683 Capital Management LLC2,191,207$7.27M0.3%+264.6%2.463%
8/16/2021Opaleye Management Inc.980,000$3.25M0.5%+12.4%1.102%
8/16/2021Nantahala Capital Management LLC7,541,497$25.04M0.7%-2.6%8.478%
8/16/2021Carlson Capital L P510,000$1.69M0.1%+27.5%0.573%
8/13/2021First Light Asset Management LLC4,115,411$13.66M0.8%+32.6%4.627%
8/13/2021Voss Capital LLC420,161$1.40M0.6%-4.5%0.472%
8/13/2021Sigma Planning Corp380,044$1.26M0.0%+16.4%0.427%
8/13/2021Jump Financial LLC94,500$314K0.0%N/A0.106%
8/12/2021DRW Securities LLC8,476,176$28.14M0.9%+6.3%9.529%
8/10/2021Rock Creek Group LP220,161$731K0.1%+15.9%0.248%
8/6/2021WealthShield Partners LLC40,726$135K0.0%N/A0.046%
8/5/2021P.A.W. Capital Corp700,000$2.32M2.0%+1.4%0.787%
8/1/2021Patriot Financial Group Insurance Agency LLC161,279$535K0.1%-6.0%0.181%
7/31/2021Sanders Morris Harris LLC945,208$3.08M0.6%+3,619.1%1.063%
5/18/2021Millennium Management LLC365,431$2.18M0.0%+83.8%0.411%
5/18/2021Opaleye Management Inc.871,800$5.21M0.8%+9.0%0.980%
5/18/2021First Light Asset Management LLC3,102,788$18.54M1.2%+269.7%3.489%
5/18/2021Morgan Stanley507,051$3.03M0.0%+6.9%0.570%
5/18/2021Doheny Asset Management CA92,130$550K0.4%+45.4%0.104%
5/18/2021Cormorant Asset Management LP4,000,000$23.90M0.5%N/A4.498%
5/18/2021Man Group plc193,872$1.16M0.0%+7.6%0.218%
5/18/2021Silverarc Capital Management LLC100,000$598K0.3%N/A0.112%
5/17/2021Endurant Capital Management LP517,472$3.09M0.8%+8.3%0.582%
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5/17/2021Polar Capital Holdings Plc1,833,731$10.96M0.1%+1.6%2.062%
5/17/2021683 Capital Management LLC600,914$3.59M0.2%-48.5%0.676%
5/17/2021Woodline Partners LP2,218,620$13.26M0.3%+130.6%2.495%
5/17/2021Ikarian Capital LLC103,904$622K0.0%+2,561.5%0.117%
5/14/2021Nantahala Capital Management LLC7,738,892$46.24M1.4%+6.4%8.703%
5/14/2021New York Life Investments Alternatives11,543$69K0.0%-77.1%0.013%
5/14/2021Prosight Management LP150,000$896K0.7%-81.8%0.169%
5/14/2021Gagnon Securities LLC109,611$655K0.1%+17.8%0.123%
5/13/2021Renaissance Technologies LLC17,600$105K0.0%-66.9%0.020%
5/13/2021Bank of Montreal Can17,190$90K0.0%-90.0%0.019%
(Data available from 1/1/2016 forward)

APTO Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of APTO shares?

During the previous two years, the following institutional investors and hedge funds held shares of Aptose Biosciences shares: Armistice Capital LLC ($1.30M), Bleichroeder LP ($563K), Carlson Capital L P ($495K), Annandale Capital LLC ($209K), Sigma Planning Corp ($158K), and Voss Capital LLC ($68K), and Texas Capital Bank Wealth Management Services Inc ($32K).Learn more on Aptose Biosciences' institutional investors.

What percentage of Aptose Biosciences' stock is owned by institutional investors?

26.62% of Aptose Biosciences' stock is owned by institutional investors. Learn more on APTO's institutional investor holdings.

Which institutional investors have been buying Aptose Biosciences' stock?

The following institutional investors have purchased Aptose Biosciences' stock in the last 24 months: Bleichroeder LP ($2.50M), Armistice Capital LLC ($1.71M), Sigma Planning Corp ($614.70K), Annandale Capital LLC ($21.33K), and Texas Capital Bank Wealth Management Services Inc ($12.45K).

How much institutional buying is happening at Aptose Biosciences?

Institutional investors have bought a total of 4,681,916 shares in the last 24 months. This purchase volume represents approximately $60.00M in transactions.


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This page (NASDAQ:APTO) was last updated on 7/1/2025 by MarketBeat.com Staff
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