Parallax Volatility Advisers, L.P.
Position in MRK — Merck & Co., Inc.
CIK 1521001
San Francisco, CA
Position in MRK
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$14,916,408
+$757,794 QoQ
Shares Held
116,081
-1.4% QoQ
Ownership
0.005%
of shares outstanding
% of Portfolio
0.73%
of 13F equity value
Holder Rank
#601
of 3,778 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in MRK Over Time
Shares Held
Position Value (USD)
Derivatives in MRK
reported options exposure · as of Jun 30, 2026CallValue
$3,829,300
CallShares
29,800
PutValue
$12,850,000
PutShares
100,000
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 Drug Manufacturers - General
Healthcare · as of Jun 30, 2026Parallax Volatility Advisers, L.P. holds $35,775,129 across 10 Drug Manufacturers - General names. MRK ranks #1 (41.7% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | MRK |
Merck & Co., Inc.
This page
|
116,081 | $14,916,408 | |
| 2 | LLY |
ELI LILLY & Co
|
9,217 | $11,055,147 | |
| 3 | BMY |
Bristol Myers Squibb Co
|
78,510 | $4,523,746 | |
| 4 | AMGN |
Amgen Inc
|
5,354 | $1,938,790 | |
| 5 | GILD |
Gilead Sciences, Inc.
|
8,057 | $1,017,921 | |
| 6 | ABBV |
AbbVie Inc.
|
3,654 | $919,492 | |
| 7 | PFE |
Pfizer Inc
|
27,276 | $656,806 | |
| 8 | BIIB |
Biogen Inc.
|
2,291 | $494,993 |
All Filings in MRK
Export CSV
50 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $3,829,300 | 29,800 | Call | Sole | 2026-08-14 | |
| 2026-06-30 | $14,916,408 | 116,081 | Shares | Sole | 2026-08-14 | |
| 2026-06-30 | $12,850,000 | 100,000 | Put | Sole | 2026-08-14 | |
| 2026-03-31 | $4,691,310 | 39,000 | Put | Sole | 2026-05-15 | |
| 2026-03-31 | $3,632,758 | 30,200 | Call | Sole | 2026-05-15 | |
| 2026-03-31 | $14,158,614 | 117,704 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $4,389,026 | 41,697 | Shares | Sole | 2026-02-17 | |
| 2025-12-31 | $19,115,216 | 181,600 | Call | Sole | 2026-02-17 | |
| 2025-12-31 | $4,336,712 | 41,200 | Put | Sole | 2026-02-17 | |
| 2025-09-30 | $27,294,036 | 325,200 | Call | Sole | 2025-11-14 | |
| 2025-09-30 | $1,678,600 | 20,000 | Put | Sole | 2025-11-14 | |
| 2025-06-30 | $7,892,252 | 99,700 | Put | Sole | 2025-08-14 | |
| 2025-06-30 | $10,354,128 | 130,800 | Call | Sole | 2025-08-14 | |
| 2025-06-30 | $975,013 | 12,317 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $1,804,176 | 20,100 | Put | Sole | 2025-05-15 | |
| 2025-03-31 | $28,283,376 | 315,100 | Call | Sole | 2025-05-15 | |
| 2024-12-31 | $847,271 | 8,517 | Shares | Sole | 2025-02-14 | |
| 2024-12-31 | $41,393,628 | 416,100 | Put | Sole | 2025-02-14 | |
| 2024-12-31 | $5,431,608 | 54,600 | Call | Sole | 2025-02-14 | |
| 2024-09-30 | $95,662,944 | 842,400 | Call | Sole | 2024-11-14 | |
| 2024-09-30 | $21,610,468 | 190,300 | Put | Sole | 2024-11-14 | |
| 2024-06-30 | $3,119,760 | 25,200 | Put | Sole | 2024-08-14 | |
| 2024-06-30 | $7,403,240 | 59,800 | Call | Sole | 2024-08-14 | |
| 2024-03-31 | $44,519,930 | 337,400 | Call | Sole | 2024-05-15 | |
| 2024-03-31 | $14,092,260 | 106,800 | Put | Sole | 2024-05-15 | |
| 2023-12-31 | $55,523,886 | 509,300 | Call | Sole | 2024-02-14 | |
| 2023-12-31 | $21,869,412 | 200,600 | Put | Sole | 2024-02-14 | |
| 2023-09-30 | $31,152,670 | 302,600 | Put | Sole | 2023-11-14 | |
| 2023-09-30 | $89,020,865 | 864,700 | Call | Sole | 2023-11-14 | |
| 2023-06-30 | $112,678,335 | 976,500 | Call | Sole | 2023-08-14 | |
| 2023-06-30 | $68,276,263 | 591,700 | Put | Sole | 2023-08-14 | |
| 2023-03-31 | $12,490,186 | 117,400 | Put | Sole | 2023-05-15 | |
| 2023-03-31 | $94,676,461 | 889,900 | Call | Sole | 2023-05-15 | |
| 2022-12-31 | $156,040,080 | 1,406,400 | Call | Sole | 2023-02-27 | |
| 2022-12-31 | $17,563,385 | 158,300 | Put | Sole | 2023-02-27 | |
| 2022-09-30 | $39,193,212 | 455,100 | Put | Sole | 2022-11-21 | |
| 2022-09-30 | $161,096,072 | 1,870,600 | Call | Sole | 2022-11-21 | |
| 2022-06-30 | $227,177,406 | 2,491,800 | Call | Sole | 2022-08-17 | |
| 2022-06-30 | $29,265,570 | 321,000 | Put | Sole | 2022-08-17 | |
| 2022-03-31 | $21,447,870 | 261,400 | Put | Sole | 2022-05-16 | |
| 2022-03-31 | $203,467,590 | 2,479,800 | Call | Sole | 2022-05-16 | |
| 2021-12-31 | $28,609,712 | 373,300 | Put | Sole | 2022-02-14 | |
| 2021-12-31 | $243,753,520 | 3,180,500 | Call | Sole | 2022-02-14 | |
| 2021-09-30 | $43,676,465 | 581,500 | Put | Sole | 2021-11-15 | |
| 2021-09-30 | $134,153,971 | 1,786,100 | Call | Sole | 2021-11-15 | |
| 2021-06-30 | $1,014,276 | 13,042 | Shares | Sole | 2021-08-16 | |
| 2021-06-30 | $52,230,332 | 671,600 | Put | Sole | 2021-08-16 | |
| 2021-06-30 | $73,026,030 | 939,000 | Call | Sole | 2021-08-16 | |
| 2021-03-31 | $84,683,404 | 1,098,500 | Call | Sole | 2021-05-14 | |
| 2021-03-31 | $33,803,973 | 438,500 | Put | Sole | 2021-05-14 | |
| No filing history on record for this holder in this stock. | ||||||