Security key
45720N103
Inhibrx Biosciences, Inc. - Common Stock, par value $0.0001 per share (INBX)
CUSIP: 45720N103
Q1 2026 13F Holders as of 31 Mar 2026
- Security type / class
- Equity / Common Stock, par value $0.0001 per share
- Total 13F shares
- 12,713,962
- Total 13F value
- $854,579,371
- Share change
- -220,974
- Put/Call ratio
- 4.2%
- SEC-reported price per share
- $67.23
- Number of holders
- 134
- Value change
- -$23,515,793
- Number of buys
- 71
- Number of sells
- 61
- Shares outstanding
- 14,665,629
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2026
Institutions
134
Top holders
10
INBX full security history
Ownership snapshot
Full 13F holder table
Inhibrx Biosciences, Inc. SEC filings
Inhibrx Biosciences, Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of INBX - Inhibrx Biosciences, Inc. - Common Stock, par value $0.0001 per share (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
MORGAN STANLEY
Disclosed value leader
PERCEPTIVE ADVISORS LLC
Comparable rows
15/15
Latest evidence
31 Dec 2025
13F
13D/G
3/4/5
Lead comparable stake: 7.9%
13D/G row: MORGAN STANLEY
Showing 1-6 of 15 holder rows.
Quick read
MORGAN STANLEY leads the comparable SEC ownership view at 7.9%.
15 of 15 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 MORGAN STANLEY's linked filing trail.
Comparable ownership
Top 5
MORGAN STANLEY
7.9%
Jon Faiz Kayyem
7.9%
Mark P. Lappe
6.4%
BlackRock, Inc.
5.3%
VIKING GLOBAL INVESTORS LP
0.7%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| MORGAN STANLEY |
13F
13D/G
Company
|
7.9%
from 13D/G
|
$92,250,538
1,167,728 shares
|
— | 31 Dec 2025 |
| Jon Faiz Kayyem |
13D/G
|
7.9%
|
$13,765,571
1,149,046 shares
|
$0 | 03 Jun 2024 |
| Mark P. Lappe |
3/4/5
13D/G
Chief Executive Officer, Director · Mark Lappe
|
6.4%
from 13D/G
|
$15,852,324
1,225,413 shares
mixed-class rows
|
— | 12 Sep 2024 |
| BlackRock, Inc. |
13F
13D/G
Company
|
5.3%
from 13D/G
|
$61,413,257
777,383 shares
|
— | 31 Dec 2025 |
| VIKING GLOBAL INVESTORS LP |
13F
3/4/5
Company · 10%+ Owner
|
0.7%
from 3/4/5
|
$113,578,695
1,437,705 shares
|
— | 31 Dec 2025 |
| PERCEPTIVE ADVISORS LLC |
13F
Company
|
9.9%
|
$114,763,853
1,452,707 shares
|
— | 31 Dec 2025 |
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.
13F holder rows
Institutional holders as of Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
134
Shares
12,713,962
Rows available
134
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2026 vs Q1 2026 Across Filers
Q1 2026 holders
134
Q1 2026 holders
134
Holder diff
0
| Investor | Q1 2026 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q1 2026 value | Value change | Value Chg % |
|---|