Who owns APTOF stock?

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View all 3 holding institutions

Across its top 3 institutional holders, APTOF's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 17/100, avg. turnover score 15/100).

Notable Holders

APTOF ranks #14036 out of 37507 tracked stocks by institutional interest, inside the more closely watched half of our coverage.

3 institutions disclose a position in APTOF, but none treat it as a major bet — even Gleason Group, Inc., its most concentrated holder, allocates just 0.0% of its own portfolio to it.

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Data Source Notice: AlphaSMO is the web's most authoritative 13F / Inside Trader database. Institutional holdings and insider trades presented here are precisely computed to deliver accurate portfolio reporting.

Company Fundamentals

APTOF reported a net loss of $25.5M in its latest fiscal year.

Not yet profitable — net loss of $25.5M in the latest fiscal year
Net income declined year over year, from -$25.4M to -$25.5M
Operating cash flow was negative, using $22.0M in cash
Current ratio of 0.69x — below the conventional 1.5x liquidity buffer

Price Chart

APTOF Quarterly 13F Institutional Trade Shifts

Recent Activity

+$323.8

Total Buy Value

$32.9K

Total Sell Value

New buy0

Trim0

Add1

Sold out1

Net Buyers

Net Sellers

Top Movers

APTOF

Q2 2026

Top 5 Institutional Movers

DRW Securities

-$32.9K

Sold out

Gleason Group

-$683.0

Trim

Caldwell Sutter Capital

+$324.0

Add

Farther Finance Advisors

-$2.0

Trim

Data by AlphaSMO • Not financial advice.

Smart Money Convergence

APTOF does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.

13F data as of 2026-06-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.

Recent APTOF Insider Buying & Selling Activity (Form 4)

Congress Trading (STOCK Act)

Form 144 Pre-Sale Notices

No Form 144 planned sale filings in the last 90 days

Beneficial Ownership (13D/13G)

No Schedule 13D/13G filings for this ticker

Material Events (8-K)

Filings (14d)

Data as of 2026-07-01

2026-07-01

No AI summary for this filing type

View Full Filing (SEC EDGAR)

2026-07-01

Aptose Biosciences has been fully acquired by Hanmi Pharmaceuticals through a statutory plan of arrangement. All remaining public shares were bought out at C$2.41 per share in cash, for a total consideration of approximately USD 3.47 million (about C$4.93 million). Hanmi already held about 19.93% of Aptose before the deal, which closed on June 30, 2026, after receiving court approval on March 31, 2026.

View Full Filing (SEC EDGAR)

View all Form 8-K filings

CUSIP

03835T408

FAQ

Who are the top institutional investors holding APTOSE BIOSCIENCES INC (APTOF)?

Major stakeholders currently include Gleason Group, Inc. ($6.3K), Caldwell Sutter Capital, Inc. ($327.0), Farther Finance Advisors, LLC ($15.0). Based on the latest 13F filings, there are a total of 3 tracked investment funds and institutions maintaining positions in APTOF.

What is the overall institutional sentiment toward APTOF recently?

Institutional sentiment appears Bullish (Net Buying). During the most recent reporting quarter, the stock experienced a net inflow of $302.5, driven by 1 managers accumulating shares while 1 reduced their exposure.

Which institutions have been selling or reducing their APTOF positions?

In the latest period, 0 funds trimmed their holdings, and 1 managers completely exited their positions. The aggregate reported sell value was $32.9K.

Are there any notable investors adding APTOF to their portfolios?

Yes, buying activity remains notable. 0 institutions opened new positions in {ticker}, and 1 existing holders added to their shares. The total reported buy value for the quarter amounted to $323.8.

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Developer Access

Access APTOF's institutional ownership data programmatically:

REST API

curl https://alphasmo.com/api/v1/market/stock/APTOF

CLI

npx alphasmo stocks get APTOF

Full API & MCP documentation →