SEC ownership of Alpha Cognition Inc.

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001655923.

Comparable stake leader

Opaleye Management Inc.

Disclosed value leader

Opaleye Management Inc.

Comparable rows

28/38

Latest evidence

26 Jun 2026

Top shareholders Insider holders Latest transactions
Public ticker
ACOG on Nasdaq
Parsed ownership sources
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
Largest SEC-reported holder
Opaleye Management Inc.
Ranking: Comparable ownership first, then disclosed value
Ownership snapshot CIK-linked ownership evidence from parsed SEC filings. 3 signals
Comparable ownership rows
28 of 38
Meaning: Rows with safely comparable ownership %
Latest 13D/G holder
Opaleye Management Inc.
Source: Latest parsed Schedule 13D/G stake
Latest parsed ownership date
26 Jun 2026
Freshness: Most recent filing date in this holder set
Issuer Names, identifiers, and filing context for this profile. 2 identity fields
Issuer CIK
0001655923
Issuer location
Grapevine, TX

Ownership snapshot

Top shareholders of Alpha Cognition Inc. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader
Opaleye Management Inc.
Disclosed value leader
Opaleye Management Inc.
Comparable rows
28/38
Latest evidence
26 Jun 2026
13D/G 3/4/5 13F Lead comparable stake: 13% 10 rows are not safely comparable across share classes. 13D/G row: Opaleye Management Inc. Showing 1-8 of 38 holder rows.

Quick read

Opaleye Management Inc. leads the comparable SEC ownership view at 13%.

28 of 38 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Opaleye Management Inc.'s linked filing trail.
Comparable ownership Top 5
Opaleye Management Inc. 13%
AWM Investment Company, Inc. 9.9%
Solas Capital Management, LLC 8.7%
James E. Besser 6.2%
Funicular Funds, LP 5.1%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 38 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
Opaleye Management Inc.
13D/G 3/4/5 13F
10%+ Owner · Company
13D/G 3/4/5 13F
13%
$18,615,538
2,895,107 shares
 +$1,766,565 26 Jun 2026
AWM Investment Company, Inc.
13D/G 13F
Company
13D/G 13F
9.9%
$14,118,234
2,172,036 shares
 +$7,335,627 31 Dec 2025
Solas Capital Management, LLC
13F 13D/G
Company
13F 13D/G
8.7%
from 13D/G
$10,566,147
1,924,617 shares
 — 31 Mar 2026
James E. Besser
13D/G
BESSER JAMES E
13D/G
6.2%
$5,176,527
1,003,203 shares
 $0 15 Jan 2025
Funicular Funds, LP
13D/G
13D/G
5.1%
$6,632,745
1,114,747 shares
 +$324,483 11 Feb 2026
Ikarian Capital, LLC
13D/G 13F
Company
13D/G 13F
4.9%
$6,865,684
1,056,259 shares
 +$574,548 31 Dec 2025
MANCHESTER MANAGEMENT CO LLC
13D/G
James E. Besser
13D/G
4.9%
$6,493,918
1,076,935 shares
 -$302,983 31 Mar 2026
Cable Car Capital, LP
13F
Company
13F
6.4%
$7,589,041
1,382,339 shares
 — 31 Mar 2026
How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Forms 3/4/5 flow

Insider trading overview

Net insider flow leans to buying over the last 12 months. Net value: +$4,313,859.

Buys
$4,563,861
Insiders: 4
Sells
$250,002
Insiders: 1
Net
+$4,313,859
Shares: +720,507
Window
Last 12 months
4 rolling buckets
Buy value Sell value
Shares: 748,285 Shares: 27,778
Window (months) Buy shares Sell shares Buy value Sell value Net value
0-3 336,657 0 $2,055,979 $0 +$2,055,979
3-6 368,850 0 $2,130,553 $0 +$2,130,553
6-9 0 0 $0 $0 $0
9-12 42,778 27,778 $377,330 $250,002 +$127,328

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-11 of 11 reporting-owner rows connected to Alpha Cognition Inc.. Open a relationship link for the CIK-to-CIK filing trail.

Rows
11
Largest Forms 3/4/5 holder
Opaleye Management Inc.
Net 12M change
+$4,313,860
Latest report
25 Jun 2026
Name Relationship Holdings Value Past Year Net Change Change % Valuation Report Date
Opaleye Management Inc. 10%+ Owner $18,451,553 +$4,166,372 +29% Mixed 25 Jun 2026
Leonard Powell Mertz Director $1,737,053 +$250,002 +17% Mixed 14 Jan 2026
Kenneth Anthony Cawkell Director $1,467,160 Mixed 14 Jan 2026
Michael E. McFadden Chief Executive Officer, Director $1,330,491 Mixed 09 Jan 2026
Lauren D'Angelo Chief Operating Officer $810,403 +$20,160 +2.6% Filing P/S 19 May 2026
Phillip Joseph Mertz Director $274,709 -$250,002 -48% Mixed 14 Jan 2026
Robert James Wills Director $144,566 +$127,328 +739% Mixed 14 Jan 2026
Huy du Henry VP Finance and Accounting $133,763 Mixed 09 Jan 2026
Rajeev Kumar Baskhi Director $124,045 Mixed 14 Jan 2026
Bethany Sensenig Director $32,887 Mixed 16 Apr 2026
John Prentiss Havens Director Mixed 25 Feb 2025

Recent insider transactions for Alpha Cognition Inc.

Showing up to 300 recent insider transactions from the last 12 months.

Insider Symbol Class Transaction % SEC-reported value SEC-reported price Shares Shares owned Date Ownership
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 5.74% $975,209 $6.40 152,336 2,805,107 26 Jun 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.01% $1,280 $6.50 197 2,652,771 25 Jun 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.17% $27,253 $5.99 4,550 2,652,574 15 Jun 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.01% $1,619 $5.93 273 2,648,024 12 Jun 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.11% $16,901 $5.91 2,862 2,647,751 11 Jun 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.22% $35,157 $5.99 5,872 2,644,889 10 Jun 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.95% $148,534 $5.98 24,856 2,639,017 09 Jun 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.39% $58,596 $5.83 10,054 2,614,161 05 Jun 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 2.79% $416,397 $5.90 70,577 2,604,107 29 May 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.08% $11,664 $5.83 2,000 2,533,530 28 May 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.05% $6,653 $5.73 1,161 2,531,530 27 May 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.63% $90,886 $5.70 15,945 2,530,369 21 May 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.34% $49,659 $5.89 8,431 2,514,424 20 May 2026 By Opaleye, L.P.
Lauren D'Angelo ACOG Common Shares Purchase 2.55% $20,160 $5.76 3,500 140,695 19 May 2026 Direct
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.7% $99,023 $5.69 17,395 2,505,993 18 May 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.67% $96,986 $5.83 16,648 2,488,598 15 May 2026 By Opaleye, L.P.
Bethany Sensenig ACOG Common Shares Award 5,489 5,489 16 Apr 2026 Direct
Bethany Sensenig ACOG Common Share Options Award 6,991 6,991 16 Apr 2026 Direct
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.07% $9,227 $4.99 1,850 2,471,850 30 Mar 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.41% $50,792 $5.08 10,000 2,470,000 27 Mar 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.3% $38,675 $5.28 7,319 2,460,000 26 Mar 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.35% $46,579 $5.43 8,581 2,452,681 25 Mar 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.17% $23,377 $5.59 4,182 2,444,100 24 Mar 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.09% $11,950 $5.71 2,094 2,439,918 19 Mar 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.1% $14,263 $5.75 2,481 2,437,824 18 Mar 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.05% $7,696 $5.78 1,331 2,435,343 16 Mar 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.3% $42,286 $5.75 7,358 2,434,012 13 Mar 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.24% $33,416 $5.85 5,708 2,426,654 12 Mar 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.09% $12,742 $5.85 2,179 2,420,946 09 Mar 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.08% $11,018 $5.80 1,900 2,418,767 06 Mar 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 5.88% $28,988 $5.80 5,000 90,000 05 Mar 2026 By Managed Account
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 1.77% $243,633 $5.80 42,023 2,416,867 05 Mar 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.84% $115,001 $5.81 19,795 2,374,844 04 Mar 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 6.25% $28,751 $5.75 5,000 85,000 03 Mar 2026 By Managed Account
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 2.01% $266,873 $5.75 46,411 2,355,049 03 Mar 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.87% $116,000 $5.80 20,000 2,308,638 02 Mar 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.16% $21,797 $5.99 3,638 2,288,638 27 Feb 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.03% $3,531 $5.98 590 2,285,000 26 Feb 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 6.67% $29,002 $5.80 5,000 80,000 24 Feb 2026 By Managed Account
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 2.4% $310,849 $5.80 53,591 2,284,410 24 Feb 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 5.9% $24,636 $5.89 4,181 75,000 23 Feb 2026 By Managed Account
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 4.49% $564,594 $5.89 95,819 2,230,819 23 Feb 2026 By Opaleye, L.P.
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 4.15% $16,466 $5.84 2,819 70,819 20 Feb 2026 By Managed Account
Opaleye Management Inc. ACOG Common Stock, no par value Purchase 0.47% $58,411 $5.84 10,000 2,135,000 20 Feb 2026 By Opaleye, L.P.
Phillip Joseph Mertz ACOG Common Shares Award 32.2% 7,241 29,703 14 Jan 2026 Direct
Phillip Joseph Mertz ACOG Common Share Options Award 8,437 8,437 14 Jan 2026 Direct
Robert James Wills ACOG Common Shares Award 48.3% 7,241 22,241 14 Jan 2026 Direct
Robert James Wills ACOG Common Share Options Award 8,437 8,437 14 Jan 2026 Direct
Leonard Powell Mertz ACOG Common Shares Award 5.23% 7,241 145,736 14 Jan 2026 Direct
Leonard Powell Mertz ACOG Common Share Options Award 8,437 8,437 14 Jan 2026 Direct
* marks a reported price that did not pass the local price check.
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