Nkarta, Inc.
Nkarta, Inc. (NKTX) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · NKTX · as of Sep 30, 2025
Ownership Breakdown
124
Institutional Holders
▲ 17 vs Q2
$119.45M
Total Inst. Value
▲ $22.53M vs Q2
71.55M
Shares Outstanding
freeFloat 75.81%
57.71M
13F Shares Held
▼ 680,841 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
NKTX largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
RA CAPITAL MANAGEMENT, L.P. pharmaceutical preparations | 10.81M | 14.61% | 14.61% | $22.37B | Nov 14, 2025 | — held |
TANG CAPITAL MANAGEMENT LLC pharmaceutical preparations | 7.06M | 9.54% | 9.54% | $14.61B | Nov 14, 2025 | — held |
SAMSARA BIOCAPITAL, LLC pharmaceutical preparations | 3.77M | 5.09% | 5.09% | $7.80B | Nov 14, 2025 | — held |
BLACKROCK, INC. pharmaceutical preparations | 3.70M | 5.00% | 5.00% | $7.66B | Nov 12, 2025 | ▼ 455.3K |
NEA MANAGEMENT COMPANY, LLC pharmaceutical preparations | 3.57M | 4.82% | 4.82% | $7.39B | Nov 14, 2025 | — held |
SR ONE CAPITAL MANAGEMENT, LP pharmaceutical preparations | 3.33M | 4.51% | 4.51% | $6.90B | Nov 12, 2025 | — held |
CITADEL ADVISORS LLC pharmaceutical preparations | 2.90M | 3.92% | 3.92% | $6.00B | Nov 14, 2025 | ▼ 398.1K |
VANGUARD GROUP INC pharmaceutical preparations | 2.49M | 3.37% | 3.37% | $5.16B | Nov 7, 2025 | ▼ 62.6K |
ALYESKA INVESTMENT GROUP, L.P. pharmaceutical preparations | 2.08M | 2.82% | 2.82% | $4.32B | Nov 17, 2025 | — held |
CAPTION MANAGEMENT, LLC pharmaceutical preparations | 2.00M | 2.70% | 2.70% | $4.14B | Nov 14, 2025 | NEW |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
18
Increased
+2.60M shares2
New Positions
first time holders21
Decreased
−2.49M shares0
Sold Out
fully exitedNet shares change (top 50)
+112.4K
+2.60M / −2.49M
Net new holders
-1
2 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
NKTX insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
6
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
HASTINGS PAUL J Chief Executive Officer | Jan 15, 2026 | Sale | 26,046 | $2.07 | $53.9K | 390.0K | Form 4 ↗ |
Mahmood Nadir President | Jan 15, 2026 | Sale | 5,649 | $2.07 | $11.7K | 167.7K | Form 4 ↗ |
Rose Shawn Marshall See Remarks | Jan 6, 2026 | Award | 139,000 | $1.93 | $268.3K | 139.0K | Form 4 ↗ |
Rose Shawn Marshall See Remarks | Jan 6, 2026 | Award | 70,000 | — | — | 70.0K | Form 4 ↗ |
Mahmood Nadir President | Jan 6, 2026 | Award | 80,000 | — | — | 173.4K | Form 4 ↗ |
Mahmood Nadir President | Jan 6, 2026 | Award | 160,000 | $1.93 | $308.8K | 160.0K | Form 4 ↗ |
HASTINGS PAUL J Chief Executive Officer | Jan 6, 2026 | Award | 562,000 | $1.93 | $1.08M | 562.0K | Form 4 ↗ |
HASTINGS PAUL J Chief Executive Officer | Jan 6, 2026 | Award | 94,000 | — | — | 416.1K | Form 4 ↗ |
Rose Shawn Marshall See Remarks | Jun 23, 2025 | Award | 500,000 | $1.75 | $875.0K | 500.0K | Form 4 ↗ |
HASTINGS PAUL J Chief Executive Officer | Jun 18, 2025 | Sale | 1,790 | $1.79 | $3.2K | 320.1K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Nkarta, Inc. (NKTX) is primarily owned by institutional investors, who hold approximately 80.7% of total shares outstanding. Company insiders own approximately 24.19%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Nkarta, Inc. is RA CAPITAL MANAGEMENT, L.P., holding approximately 10.81 million shares — equal to 14.61% of outstanding shares — as of September 30, 2025.
A total of 124 institutional investors currently hold NKTX stock, with a combined institutional value of approximately $119,452,190 as of the most recent 13F filing period.
Frequently asked questions
NKTX ownershipNkarta, Inc. (NKTX) is primarily owned by institutional investors, who hold approximately 80.7% of shares. The largest shareholder is RA CAPITAL MANAGEMENT, L.P. with a 14.61% stake. Company insiders hold 24.19%. Data sourced from SEC Form 13F as of September 30, 2025.