Y-mAbs Therapeutics, Inc.
Total Trades
30
Buys
7
Sells
19
Largest Trade
$1M+
Insiders
9
Institutional Funds
1
Inst. Value
$1K–$15K
Activist Filings
24
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Rossi Michael J | PRESIDENT & CEO | SELL | $15K–$50K | 4K | $5.20 | Mar 12, 2025 |
| Gad Thomas | CHIEF BUSINESS OFF… | SELL | $50K–$100K | 11K | $5.23 | Mar 12, 2025 |
| Lund-Hansen Torben | SVP & CHIEF TECHNI… | SELL | $500K+ | 50K | $15.37 | Aug 30, 2024 |
| Lund-Hansen Torben | SVP & CHIEF TECHNI… | EXERCISE | $100K–$500K | 50K | $4.38 | Aug 30, 2024 |
| Wilms Joris | SVP & CHIEF OPERAT… | SELL | $50K–$100K | 5K | $14.69 | Aug 27, 2024 |
| Ber Gerard | Director | SELL | $1K–$15K | 722 | $12.00 | Jun 11, 2024 |
| Gad Thomas | CHIEF BUSINESS OFF… | SELL | $500K+ | 70K | $12.02 | Jun 11, 2024 |
| Kruse Bo | EVP | SELL | $500K+ | 60K | $12.05 | Jun 1, 2024 |
| Kruse Bo | EVP | EXERCISE | $100K–$500K | 60K | $2.00 | Jun 1, 2024 |
| Gad Thomas | CHIEF BUSINESS OFF… | SELL | $100K–$500K | 32K | $12.23 | May 23, 2024 |
| WG Biotech ApS | Director | BUY | $100K–$500K | 52K | $5.97 | Dec 1, 2023 |
| Wedell-Wedellsborg Johan | Director | BUY | $100K–$500K | 52K | $5.97 | Dec 1, 2023 |
| Wedell-Wedellsborg Johan | Director | BUY | $500K+ | 93K | $5.59 | Nov 29, 2023 |
| WG Biotech ApS | Director | BUY | $500K+ | 93K | $5.59 | Nov 29, 2023 |
| Gad Thomas | Chief Business Off… | SELL | $500K+ | 150K | $5.30 | Nov 22, 2023 |
| Wedell-Wedellsborg Johan | Director | BUY | $500K+ | 102K | $9.65 | May 17, 2023 |
| WG Biotech ApS | Director | BUY | $500K+ | 102K | $9.65 | May 17, 2023 |
| Rajah Vignesh | SVP & CMO | BUY | $1K–$15K | 1K | $4.92 | Nov 17, 2022 |
| Kruse Bo | EVP | SELL | $15K–$50K | 4K | $7.85 | Feb 23, 2022 |
| Gad Thomas | See remarks | SELL | $1M+ | 281K | $7.19 | Feb 9, 2022 |
| Kruse Bo | EVP | SELL | $15K–$50K | 4K | $7.97 | Feb 7, 2022 |
| Gad Thomas | See remarks | SELL | $1M+ | 136K | $7.75 | Feb 7, 2022 |
| Gad Thomas | See remarks | SELL | $50K–$100K | 8K | $10.15 | Feb 3, 2022 |
| Gad Thomas | See remarks | EXERCISE | $15K–$50K | 8K | $2.00 | Feb 3, 2022 |
| Gad Thomas | See remarks | SELL | $500K+ | 88K | $10.63 | Jan 26, 2022 |
| Kruse Bo | EVP | SELL | $15K–$50K | 4K | $9.84 | Jan 25, 2022 |
| Gad Thomas | See remarks | SELL | $1M+ | 183K | $11.10 | Jan 24, 2022 |
| Gad Thomas | See remarks | SELL | $500K+ | 78K | $10.96 | Jan 20, 2022 |
| Gad Thomas | See remarks | EXERCISE | $15K–$50K | 8K | $2.00 | Jan 20, 2022 |
| Kruse Bo | EVP | SELL | $50K–$100K | 4K | $17.12 | Jan 5, 2022 |
Institutional Ownership
13F filings as of Sep 30, 2025 · 1 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| IFP Advisors, Inc | 332 | $1K–$15K | SH |
| IFP Advisors, Inc | 332 | $1K–$15K | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
Paradigm BioCapital Advisors LP
SC 13G/A · Nov 14, 2025
0.0%
0 shares
HBM Healthcare Investments (Cayman) Ltd.
SC 13G/A · Nov 14, 2025
0.0%
0 shares
SC 13G/A · Nov 14, 2025
0.0%
0 shares
SC 13G/A · Nov 14, 2025
0.0%
0 shares
SC 13G/A · Nov 13, 2025
0.0%
0 shares
SC 13G/A · Aug 20, 2025
2.6%
1.2M shares
SC 13G · Aug 15, 2025
5.8%
2.7M shares
SC 13G/A · Aug 15, 2025
3.0%
1.3M shares
SC 13G · Aug 12, 2025
9.0%
4.1M shares
SC 13G · May 14, 2025
5.2%
2.3M shares
Paradigm BioCapital Advisors LP 2.
SC 13G/A · Nov 14, 2024
4.1M shares
SC 13G/A · Nov 12, 2024
4.6%
2.0M shares
SC 13G/A · Nov 4, 2024
4.6%
2.0M shares
Y-mAbs Therapeutics, Inc. (Subject)
SC 13G · Apr 8, 2024
0.0%
0 shares
SC 13G/A · Feb 14, 2024
10.4%
4.6M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
5.1%
2.2M shares
HBM Healthcare Investments (Cayman) Ltd.
SC 13G/A · Feb 13, 2024
7.6%
3.3M shares
SC 13G/A · Jan 26, 2024
6.7%
2.9M shares
SC 13G · Apr 3, 2023
2.2%
977K shares
HBM Healthcare Investments (Cayman) Ltd.
SC 13G/A · Feb 14, 2023
8.7%
3.8M shares
SC 13G · Feb 14, 2023
9.6%
4.2M shares
SC 13G/A · Feb 1, 2023
5.9%
2.6M shares
Wellington Management Group LLP
SC 13G/A · Apr 11, 2022
4.4%
1.9M shares
Sofinnova Venture Partners X, L.P. (“SVP X”)
SC 13D/A · Feb 14, 2022
5.0%
2.2M shares