Comparable stake leader
Apeiron Investment Group Ltd.
SEC ownership of Atai Beckley N.V.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001840904.
Disclosed value leader
Apeiron Investment Group Ltd.
Comparable rows
8/31
Latest evidence
31 Mar 2026
- Public ticker
- ATAI on Nasdaq
- Parsed ownership sources
-
3/4/5, 13D/G, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Apeiron Investment Group Ltd.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
8 of 31
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Apeiron Investment Group Ltd.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001840904
- Issuer location
- Amstelveen
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Atai Beckley N.V. (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
Apeiron Investment Group ...
Disclosed value leader
Apeiron Investment Group ...
Comparable rows
8/31
Latest evidence
31 Mar 2026
3/4/5
13D/G
13F
Lead comparable stake: 24%
23 rows are not safely comparable across share classes.
13D/G row: Apeiron Investment Group Ltd.
Showing 1-8 of 31 holder rows.
Quick read
Apeiron Investment Group Ltd. leads the comparable SEC ownership view at 24%.
8 of 31 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 Apeiron Investment Group Ltd.'s linked filing trail.
Comparable ownership
Top 5
Apeiron Investment Group Ltd.
24%
Galaxy Group Funding ECI U LLC
4.2%
Brown University
0.2%
STABLEFORD CAPITAL II LLC
0.08%
KLP KAPITALFORVALTNING AS
0.02%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 31 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Apeiron Investment Group Ltd. |
3/4/5
13D/G
10%+ Owner · Christian Angermayer
|
24%
from 13D/G
|
$260,599,299
55,211,716 shares
|
+$19,000,000 | 30 Sep 2025 |
| Galaxy Group Funding ECI U LLC |
13D/G
|
4.2%
|
$11,945,148
8,471,736 shares
|
$0 | 31 Mar 2025 |
| Brown University |
13F
Company
|
0.2%
|
$2,543,490
718,500 shares
|
— | 31 Mar 2026 |
| STABLEFORD CAPITAL II LLC |
13F
Company
|
0.08%
|
$1,013,438
286,282 shares
|
— | 31 Mar 2026 |
| KLP KAPITALFORVALTNING AS |
13F
Company
|
0.02%
|
$247,092
69,800 shares
|
— | 31 Mar 2026 |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC |
13F
Company
|
0.01%
|
$198,763
52,444 shares
|
— | 31 Mar 2026 |
| RHL GROUP, LLC |
13F
Company
|
0%
|
$255
72 shares
|
— | 31 Mar 2026 |
| Sankala Group LLC |
13F
Company
|
0%
|
$177
52 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: +$19,000,000.
Buys
$19,000,000
Insiders: 1
Sells
$0
Insiders: 0
Net
+$19,000,000
Shares: +8,675,799
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 8,675,799
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 8,675,799 | 0 | $19,000,000 | $0 | +$19,000,000 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 24 reporting-owner rows connected to Atai Beckley N.V.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
24
Largest Forms 3/4/5 holder
Apeiron Investment Group Ltd.
Net 12M change
+$19,000,000
Latest report
25 Nov 2025
Recent insider transactions for Atai Beckley N.V.
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Cosmo Feilding-Mellen | ATAI | Stock Option | Award | 10,000 | 10,000 | 25 Nov 2025 | Direct | |||
| Cosmo Feilding-Mellen | ATAI | Stock Option | Disposed to Issuer | -100% | -40,400 | 0 | 25 Nov 2025 | Direct | ||
| Cosmo Feilding-Mellen | ATAI | Common Shares | Award | 7,702,990 | 7,702,990 | 05 Nov 2025 | Direct | |||
| Cosmo Feilding-Mellen | ATAI | Stock Option | Award | 143,400 | 103,000 | 05 Nov 2025 | Direct | |||
| Robert Hershberg | ATAI | Stock Option | Award | 719,121 | 456,011 | 05 Nov 2025 | Direct | |||
| Scott Braunstein | ATAI | Stock Option | Award | 56,818 | 56,818 | 04 Nov 2025 | Direct | |||
| Christopher Ryan Cave Barrett | ATAI | Stock Option | Award | 175,000 | 175,000 | 01 Oct 2025 | Direct | |||
| Apeiron Investment Group Ltd. | ATAI | Common Shares | Conversion of derivative security | 4.64% | 2,367,200 | 53,412,414 | 30 Sep 2025 | By Apeiron Investment Group Ltd. | ||
| Apeiron Investment Group Ltd. | ATAI | Convertible Notes | Conversion of derivative security | -100% | -147,950 | 0 | 30 Sep 2025 | By Apeiron Investment Group Ltd. | ||
| Apeiron Investment Group Ltd. | ATAI | Common Shares | Purchase | 20.5% | $19,000,000 | $2.19 | 8,675,799 | 51,045,214 | 14 Aug 2025 | By Apeiron Investment Group Ltd. |
| Srinivas Rao | ATAI | Stock Option | Award | 868,571 | 650,794 | 13 Aug 2025 | Direct |
* marks a reported price that did not pass the local price check.