Hudson Bay Capital Management LP
Position in TMO — Thermo Fisher Scientific Inc.
CIK 1393825
STAMFORD, CT
Position in TMO
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$260,707
-$115,183 QoQ
Shares Held
520
-32.9% QoQ
Ownership
0.000%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#2,123
of 2,606 holders
Holding Since
Jun 2020
6 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in TMO Over Time
Shares Held
Position Value (USD)
Derivatives in TMO
reported options exposure · as of Jun 30, 2025CallValue
$1,054,196
CallShares
2,600
PutValue
$4,257,330
PutShares
10,500
Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.
Position in Diagnostics & Research
Healthcare · as of Jun 30, 2026Hudson Bay Capital Management LP holds $42,778,768 across 6 Diagnostics & Research names. TMO ranks #6 (0.6% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | MTD |
Mettler Toledo International Inc/
|
22,000 | $28,105,220 | |
| 2 | QGEN |
Qiagen N.V.
|
277,500 | $10,850,250 | |
| 3 | GH |
Guardant Health, Inc.
|
19,360 | $2,904,580 | |
| 4 | IDXX |
Idexx Laboratories Inc /De
|
680 | $357,979 | |
| 5 | WAT |
Waters Corp /De/
|
800 | $300,032 | |
| 6 | TMO |
Thermo Fisher Scientific Inc.
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|
520 | $260,707 |
All Filings in TMO
Export CSV
9 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $260,707 | 520 | Shares | Defined | 2026-08-14 | |
| 2025-09-30 | $375,890 | 775 | Shares | Defined | 2025-12-15 | |
| 2025-06-30 | $4,257,330 | 10,500 | Put | Sole | 2025-08-18 | |
| 2025-06-30 | $2,243,004 | 5,532 | Shares | Sole | 2025-08-18 | |
| 2025-06-30 | $1,054,196 | 2,600 | Call | Sole | 2025-08-18 | |
| 2025-03-31 | $379,171 | 762 | Shares | Sole | 2025-05-14 | |
| 2025-03-31 | $696,640 | 1,400 | Put | Sole | 2025-05-14 | |
| 2020-09-30 | $34,217,800 | 77,500 | Shares | Sole | 2020-11-12 | |
| 2020-06-30 | $36,234,000 | 100,000 | Shares | Sole | 2020-08-12 | |
| No filing history on record for this holder in this stock. | ||||||