CHARLES SCHWAB INVESTMENT MANAGEMENT INC
Position in SERA — Sera Prognostics, Inc.
CIK 884546
SAN FRANCISCO, CA
Position in SERA
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$24,532
-$11,118 QoQ
Shares Held
12,085
0.0% QoQ
Ownership
0.031%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2022
14 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in SERA Over Time
Shares Held
Position Value (USD)
Position in Medical Devices
Healthcare · as of Jun 30, 2026CHARLES SCHWAB INVESTMENT MANAGEMENT INC holds $9,357,274,568 across 81 Medical Devices names.
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ABT |
Abbott Laboratories
|
59,674,507 | $5,414,864,764 | |
| 2 | MDT |
Medtronic plc
|
8,905,319 | $696,663,105 | |
| 3 | SYK |
Stryker Corp
|
2,148,933 | $676,570,065 | |
| 4 | BSX |
Boston Scientific Corp
|
9,223,151 | $393,644,084 | |
| 5 | EW |
Edwards Lifesciences Corp
|
3,693,034 | $334,071,855 | |
| 6 | DXCM |
Dexcom Inc
|
3,439,164 | $231,627,694 | |
| 7 | GEHC |
GE HealthCare Technologies Inc.
|
3,129,530 | $200,321,215 | |
| 8 | STE |
STERIS plc
|
666,633 | $140,372,910 |
All Filings in SERA
Export CSV
14 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $24,532 | 12,085 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $35,650 | 12,085 | Shares | Sole | 2026-02-13 | |
| 2025-09-30 | $37,001 | 12,092 | Shares | Sole | 2025-11-10 | |
| 2025-06-30 | $33,494 | 12,092 | Shares | Sole | 2025-08-12 | |
| 2025-03-31 | $298,926 | 81,230 | Shares | Sole | 2025-09-15 | |
| 2024-12-31 | $661,195 | 81,228 | Shares | Sole | 2025-02-06 | |
| 2024-09-30 | $601,481 | 77,113 | Shares | Sole | 2024-11-12 | |
| 2024-06-30 | $456,508 | 77,113 | Shares | Sole | 2024-08-12 | |
| 2024-03-31 | $109,200 | 12,000 | Shares | Sole | 2024-05-09 | |
| 2023-12-31 | $71,760 | 12,000 | Shares | Sole | 2024-02-06 | |
| 2023-09-30 | $22,320 | 12,000 | Shares | Sole | 2023-11-08 | |
| 2023-06-30 | $39,540 | 12,000 | Shares | Sole | 2023-08-10 | |
| 2023-03-31 | $45,960 | 12,000 | Shares | Sole | 2023-05-12 | |
| 2022-03-31 | $67,249 | 17,744 | Shares | Sole | 2022-05-13 | |
| No filing history on record for this holder in this stock. | ||||||