ACOG · Alpha Cognition Inc. · Shareholders & Ownership

$8.91 +0.61 (+7.35%) At close · Oct 27 Q1 2026 earnings call transcript

Market Cap

$194.48M

21.78M

Volume · Oct 27 152.6K Avg daily vol (3M) 123.35K

Every disclosed holder of ACOG in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns ACOG

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	27	10,911,865	50.11%	Yes
Insiders (Forms 3, 4, 5)	0	0	0.00%	No
13D/G-only blocks	4	4,076,392	18.72%	Yes
Remaining	—	6,789,611	31.18%	Rest
Registered funds (N-PORT, not summed)	1	14,307	0.07%	No

Shares outstanding: 21,777,868, the issuer's latest cover-page count restated onto today's split basis.

Insiders are listed but not summed: the issuer has more than one class of common stock and Forms 3, 4 and 5 report one issuer-wide balance across them.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of ACOG

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	Opaleye Management Inc. Insider CIK 1595855 · Oct 23, 2026 Insider, issuer-wide, not summed	3,391,984	15.58%	+32,090	Oct 23, 2026	Insider, issuer-wide, not summed
1.1	Opaleye Management Inc. 13G CIK 1595855 · Registered investment adviser · Jul 23, 2026 Rule 13d-1(c), passive investor, not summed	3,095,193	14.21%	+200,086	Jul 23, 2026	Rule 13d-1(c), passive investor, not summed
1.2	Opaleye Management Inc. 13F CIK 1595855 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,895,467	13.30%	+333,517	Jun 30, 2026	carried, not yet filed for the newest quarter
2	Solas Capital Management, LLC 13F CIK 1604867 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,924,617	8.84%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
3	AWM Investment Company, Inc. 13F CIK 1535264 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,672,168	7.68%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
4	JAMES E. BESSER 13G CIK 1169253 · Investment adviser · Jul 14, 2026 Rule 13d-1(c), passive investor	1,639,255	7.53%	+562,320	Jul 14, 2026	Rule 13d-1(c), passive investor
5	Cable Car Capital, LP 13F CIK 1699575 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,382,339	6.35%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
6	Funicular Funds, LP 13G CIK 1937147 · Unknown · Feb 11, 2026 Rule 13d-1(c), passive investor	1,114,747	5.12%	+54,535	Feb 11, 2026	Rule 13d-1(c), passive investor
7	BESSER JAMES E 13G CIK 1512127 · Unknown · Jan 15, 2025 Rule 13d-1(c), passive investor	1,003,203	4.61%	—	Jan 15, 2025	Rule 13d-1(c), passive investor
8	Ikarian Capital, LLC 13F CIK 1778253 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	836,259	3.84%	-220,000	Jun 30, 2026	carried, not yet filed for the newest quarter
9	SPHERA FUNDS MANAGEMENT LTD. 13F CIK 1496201 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	545,816	2.51%	-21,800	Jun 30, 2026	carried, not yet filed for the newest quarter
10	ESSEX INVESTMENT MANAGEMENT CO LLC 13F CIK 201772 · Registered investment adviser · Sep 30, 2026	422,858	1.94%	+422,858	Sep 30, 2026
11	Alyeska Investment Group, L.P. 13F CIK 1453072 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	365,000	1.68%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
12	John Havens 13D CIK 2028876 · Unknown · Nov 13, 2024	319,187	1.47%	—	Nov 13, 2024
12.1	HAVENS JOHN PRENTISS Insider CIK 2028876 · Nov 13, 2024 Director, issuer-wide, not summed	285,587	1.31%	+4,347	Nov 13, 2024	Director, issuer-wide, not summed
13	MERTZ LEONARD POWELL Insider CIK 2028687 · Jan 14, 2026 Director, issuer-wide, not summed	267,239	1.23%	+7,241	Jan 14, 2026	Director, issuer-wide, not summed
14	CAWKELL KENNETH ANTHONY Insider CIK 2029580 · Jan 14, 2026 Director, issuer-wide, not summed	225,717	1.04%	+7,241	Jan 14, 2026	Director, issuer-wide, not summed
15	Aristides Capital LLC 13F CIK 1595521 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	218,510	1.00%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
16	McFadden Michael E. Insider CIK 1748333 · Jan 9, 2026 Director, Chief Executive Officer, issuer-wide, not summed	204,691	0.94%	+190,549	Jan 9, 2026	Director, Chief Executive Officer, issuer-wide, not summed
17	BOOTHBAY FUND MANAGEMENT, LLC 13F CIK 1549230 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	189,148	0.87%	-67,245	Jun 30, 2026	carried, not yet filed for the newest quarter
18	D'Angelo Lauren Insider CIK 2032983 · May 19, 2026 Chief Operating Officer, issuer-wide, not summed	140,695	0.65%	+3,500	May 19, 2026	Chief Operating Officer, issuer-wide, not summed
19	CANTOR FITZGERALD, L. P. 13F CIK 1024896 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	108,918	0.50%	-79,713	Jun 30, 2026	carried, not yet filed for the newest quarter
20	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	97,546	0.45%	+7,957	Jun 30, 2026	carried, not yet filed for the newest quarter
21	VILLERE ST DENIS J & CO LLC 13F CIK 1113629 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	71,158	0.33%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
22	TUDOR INVESTMENT CORP ET AL 13F CIK 923093 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	61,596	0.28%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
23	ACT CAPITAL MANAGEMENT, LLC 13F CIK 1442273 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	51,500	0.24%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
24	MERTZ PHILLIP JOSEPH Insider CIK 2028904 · Jan 14, 2026 Director, issuer-wide, not summed	42,263	0.19%	+7,241	Jan 14, 2026	Director, issuer-wide, not summed
25	Wills Robert James Insider CIK 1634189 · Aug 21, 2026 Director, issuer-wide, not summed	32,241	0.15%	+10,000	Aug 21, 2026	Director, issuer-wide, not summed
26	DU HENRY HUY Insider CIK 2044763 · Jan 9, 2026 VP Finance and Accounting, issuer-wide, not summed	20,579	0.09%	—	Jan 9, 2026	VP Finance and Accounting, issuer-wide, not summed
27	BERKSHIRE ASSET MANAGEMENT LLC/PA 13F CIK 949012 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	19,824	0.09%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
28	BAKSHI RAJEEV KUMAR Insider CIK 2028900 · Jan 14, 2026 Director, issuer-wide, not summed	19,084	0.09%	+7,241	Jan 14, 2026	Director, issuer-wide, not summed
29	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	18,832	0.09%	+2,946	Jun 30, 2026	carried, not yet filed for the newest quarter
30	Fidelity Nasdaq Composite Index Fund Fund S000055366 · Registered fund · Aug 31, 2026 Fidelity Concord Street Trust, not summed	14,307	0.07%	+2,315	Aug 31, 2026	Fidelity Concord Street Trust, not summed
31	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	11,992	0.06%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
32	RAYMOND JAMES FINANCIAL INC 13F CIK 720005 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	10,000	0.05%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
33	Sensenig Bethany Insider CIK 1899935 · Apr 16, 2026 Director, issuer-wide, not summed	5,489	0.03%	—	Apr 16, 2026	Director, issuer-wide, not summed
34	NATIONAL BANK OF CANADA /FI/ 13F CIK 926171 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	5,292	0.02%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
35	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,456	0.01%	+1,018	Jun 30, 2026	carried, not yet filed for the newest quarter
36	Allworth Financial LP 13F CIK 1555170 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	750	0.00%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
37	JONES FINANCIAL COMPANIES LLLP 13F CIK 815917 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	250	0.00%	+150	Jun 30, 2026	carried, not yet filed for the newest quarter
38	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	200	0.00%	+200	Jun 30, 2026	carried, not yet filed for the newest quarter
39	Steward Partners Investment Advisory, LLC 13F CIK 1723397 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	200	0.00%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
40	ROYAL BANK OF CANADA 13F CIK 1000275 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	122	0.00%	-557	Jun 30, 2026	carried, not yet filed for the newest quarter
41	HARBOUR INVESTMENTS, INC. 13F CIK 810121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	47	0.00%	+43	Jun 30, 2026	carried, not yet filed for the newest quarter

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Key facts CIK 1655923 CUSIP 02074J501 13F (30d) 1 filings 1 filers Visit website Investor relations