Security key
86627T108
- Security type / class
- Equity / COM
- Total 13F shares
- 118,916,541
- Total 13F value
- $2,252,623,193
- Share change
- +12,909
- Put/Call ratio
- 126%
- SEC-reported price per share
- $18.96
- Number of holders
- 221
- Value change
- +$4,860,607
- Number of buys
- 133
- Number of sells
- 86
Open additional details 1 more signal available
Report period
Q1 2026
Institutions
221
Top holders
10
SMMT full security history
Ownership snapshot
Full 13F holder table
Summit Therapeutics Inc. SEC filings
Summit Therapeutics Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of SMMT - Summit Therapeutics Inc. - COM (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
BAKER BROS. ADVISORS LP
Disclosed value leader
BAKER BROS. ADVISORS LP
Comparable rows
0/15
Latest evidence
02 Jan 2026
13F
3/4/5
Highest disclosed value: $636,479,692
15 rows are not safely comparable across share classes.
Showing 1-6 of 15 holder rows.
Quick read
BAKER BROS. ADVISORS LP has the largest disclosed position value at $636.48M.
0 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 BAKER BROS. ADVISORS LP's linked filing trail.
Disclosed position value
Top 5
BAKER BROS. ADVISORS LP
$636.48M
Yu Xia
$600.8M
FMR LLC
$233.68M
VANGUARD GROUP INC
$195.49M
PRICE T ROWE ASSOCIATES INC /MD/
$163.91M
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BAKER BROS. ADVISORS LP |
13F
Company
|
—
class O/S missing
|
$636,479,692
36,391,063 shares
|
— | 31 Dec 2025 |
| Yu Xia |
3/4/5
Director
|
—
mixed-class rows
|
$600,800,855
32,092,147 shares
mixed-class rows
|
+$9,999,983 | 02 Jan 2026 |
| FMR LLC |
13F
Company
|
—
class O/S missing
|
$233,680,513
13,360,807 shares
|
— | 31 Dec 2025 |
| VANGUARD GROUP INC |
13F
Company
|
—
class O/S missing
|
$195,489,577
11,177,220 shares
|
— | 31 Dec 2025 |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
Company
|
—
class O/S missing
|
$163,907,000
9,371,415 shares
|
— | 31 Dec 2025 |
| BlackRock, Inc. |
13F
Company
|
—
class O/S missing
|
$163,739,998
9,361,921 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
221
Shares
118,916,541
Rows available
221
| 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
221
Q1 2026 holders
221
Holder diff
0
| Investor | Q1 2026 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q1 2026 value | Value change | Value Chg % |
|---|