Security key
71722W107
Phathom Pharmaceuticals, Inc. - Common Stock, par value $0.0001 per share (PHAT)
CUSIP: 71722W107
Q1 2026 13F Holders as of 31 Mar 2026
- Security type / class
- Equity / Common Stock, par value $0.0001 per share
- Total 13F shares
- 68,705,502
- Total 13F value
- $763,431,243
- Share change
- +6,467,137
- Put/Call ratio
- 5.8%
- SEC-reported price per share
- $11.11
- Number of holders
- 172
- Value change
- +$57,782,276
- Number of buys
- 105
- Number of sells
- 73
- Shares outstanding
- 78,837,943
Holder snapshot
7 signals
Show 1 more signal
Security identity
1 source field
Report period
Q1 2026
Institutions
172
Top holders
10
PHAT full security history
Ownership snapshot
Full 13F holder table
Previous quarter: Q4 2025
Phathom Pharmaceuticals, Inc. SEC filings
Phathom Pharmaceuticals, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 71722W107
Recent filing periods:
Ownership snapshot
Top reported holders of PHAT - Phathom Pharmaceuticals, 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
Frazier Life Sciences Pub...
Disclosed value leader
Frazier Life Sciences Man...
Comparable rows
15/15
Latest evidence
06 Mar 2026
13D/G
13F
3/4/5
Lead comparable stake: 8.6%
13D/G row: Frazier Life Sciences Public Fund, L.P.
Showing 1-6 of 15 holder rows.
Quick read
Frazier Life Sciences Public Fund, L.P. leads the comparable SEC ownership view at 8.6%.
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.
Comparable ownership
Top 5
Frazier Life Sciences Public Fund...
8.6%
MILLENNIUM MANAGEMENT LLC
5.3%
Carlyle Group Inc.
4.9%
BlackRock, Inc.
4.6%
PRUDENTIAL FINANCIAL INC
0%
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 |
|---|---|---|---|---|---|
| Frazier Life Sciences Public Fund, L.P. |
13D/G
James N. Topper
|
8.6%
|
$70,447,299
5,985,327 shares
|
$0 | 01 Nov 2025 |
| MILLENNIUM MANAGEMENT LLC |
13D/G
13F
Company
|
5.3%
|
$51,101,967
4,178,411 shares
|
+$25,636,905 | 06 Mar 2026 |
| Carlyle Group Inc. |
13F
13D/G
Company
|
4.9%
from 13D/G
|
$57,977,077
3,496,808 shares
|
— | 31 Dec 2025 |
| BlackRock, Inc. |
13F
13D/G
Company
|
4.6%
from 13D/G
|
$58,986,540
3,555,548 shares
|
— | 31 Dec 2025 |
| PRUDENTIAL FINANCIAL INC |
13D/G
|
0%
|
$8,705
2,630 shares
|
-$24,547,397 | 31 May 2025 |
| Frazier Life Sciences Management, L.P. |
13F
Company
|
16%
|
$206,819,053
12,466,489 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
172
Shares
68,705,502
Rows available
172
| 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 Q4 2025 Across Filers
Q4 2025 holders
173
Q1 2026 holders
172
Holder diff
-1
| Investor | Q4 2025 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q4 2025 value | Q1 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend