What is CUSIP 04746L104?

CUSIP 04746L104 is the security identifier used in SEC filing datasets for ATHA - LeonaBio, Inc. - Common Stock, $0.0001 par value.

Who owns ATHA - LeonaBio, Inc. - Common Stock, $0.0001 par value based on 13F filings?

Open this security page to review the newest available 13F ownership history, top reported holders, and period-by-period changes.

Security Snapshot

LeonaBio, Inc. - Common Stock, $0.0001 par value (ATHA) Institutional Ownership

CUSIP: 04746L104

13F Institutional Holders and Ownership History from Q3 2020 to Q4 2025

Latest Period

n/a

Institutions Reporting

Shares (Excl. Options)

Price

$0.38

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Security type / class: Equity / Common Stock, $0.0001 par value
Symbol: ATHA on Nasdaq
Shares outstanding: 9,416,558
SEC-reported price per share: $0.38
Insider filing price: $0.38

13F Shares, Excluding Options vs Price

13F Value, Excluding Options

Total Investors

Key facts

ATHA - LeonaBio, Inc. - Common Stock, $0.0001 par value is tracked under CUSIP 04746L104.
Latest finished 13F holder period is not available.
3 significant owners is listed from Schedule 13D/13G reporting.

Change

Holder count moved from 2 to 0 between Q3 2025 and Q4 2025.
SEC-reported value moved from $595 to $0.

Research use

You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Evidence

Source: SEC Schedule 13D/G

Ownership context comes from Schedule 13D/G and available holder history for this CUSIP.

Open SEC evidence

Security key

04746L104

Latest holder period

n/a

13F holders

13D/G owners

CIK / CUSIP context first

ATHA full holder history LeonaBio, Inc. SEC filings LeonaBio, Inc. company facts LeonaBio, Inc. insider transactions

Broader feeds

Latest 13F filings Latest 13D/G filings All securities

Recent Quarterly Holder Reports

Open recent reporting periods for CUSIP 04746L104:

Q4 2025 (0 holders) Q3 2025 (2 holders) Q2 2025 (50 holders) Q1 2025 (52 holders) Q4 2024 (54 holders) Q3 2024 (56 holders) Q2 2024 (65 holders) Q1 2024 (73 holders) Q4 2023 (64 holders) Q3 2023 (70 holders)

13D/G owners

Significant owners

Large-stake holder rows connected to Schedule 13D/G evidence.

Rows

Security

ATHA

Filer	Ownership	Change %	Holdings Value	Net Change	Nb Shares	Change %	Reporting Name	Report Period
PERCEPTIVE ADVISORS LLC	20%		$715,301		1,882,370		Perceptive Advisors LLC	05 May 2026
ACORN BIOVENTURES, L.P.	6.2%	+20%	$1,345,504	+$212,929	596,068	+19%	Anders Hove	06 Jan 2026
Oliveira Steven Michael	4.1%	-20%	$69,324	-$788,375	161,218	-92%	Oliveira Steven Michael	01 Oct 2025

Quarter history

Institutional holders across reporting periods

Holder count, reported shares/value, and median price by quarter.

Periods

Latest

n/a

Rows shown

1-22 of 22

Period	13F Shares, Excl. Options	Value, Excl. Options	Value Change	Puts Notional Value	Calls Notional Value	Price (Median)	Investors
2025 Q4	0	$0	-$595			$0.38	0
2025 Q3	1,052	$595	-$5,301,419		$0	$2.26	2
2025 Q2	17,548,824	$5,295,638	+$4,106	$0	$7,278	$0.30	50
2025 Q1	17,565,344	$5,002,785	-$111,730	$1,254	$4,074	$0.28	52
2024 Q4	17,923,414	$10,513,884	+$1,168,387	$469	$10,091	$0.59	54
2024 Q3	16,127,357	$7,192,159	-$16,853,612	$30,328	$50,216	$0.45	56
2024 Q2	22,193,550	$58,807,500	+$1,275,233	$259,170	$194,510	$2.65	65
2024 Q1	21,695,406	$59,443,068	-$117,105	$116,176	$211,254	$2.74	73
2023 Q4	21,901,553	$53,218,137	-$1,833,437	$12,393	$768,366	$2.43	64
2023 Q3	21,432,485	$43,293,241	-$1,354,746	$19,796	$645,390	$2.02	70
2023 Q2	21,887,314	$64,565,994	-$5,409,932	$112,100	$966,420	$2.95	76
2023 Q1	23,800,339	$59,500,190	+$2,342,756	$184,500	$803,000	$2.50	81
2022 Q4	21,791,013	$69,074,070	+$2,745,077	$220,315	$1,564,078	$3.17	92
2022 Q3	22,084,894	$65,591,691	+$171,025	$245,975	$1,835,000	$2.97	94
2022 Q2	21,955,517	$66,960,232	-$100,026,928	$3,510,965	$11,459,345	$3.05	89
2022 Q1	26,114,392	$352,431,678	+$183,845	$12,232,000	$37,150,500	$13.50	99
2021 Q4	26,188,389	$341,210,519	+$17,550,511	$10,670,000	$18,954,500	$13.03	97
2021 Q3	24,890,216	$233,607,844	+$136,180	$3,325,000	$1,933,000	$9.38	91
2021 Q2	24,736,986	$253,318,555	-$61,367,283	$3,734,000	$1,823,000	$10.24	86
2021 Q1	26,338,783	$484,401,324	+$83,845,702			$18.40	68
2020 Q4	21,510,354	$733,206,641	+$29,318,645			$34.25	69
2020 Q3	21,658,200	$395,426,446	+$395,426,446			$18.46	54