683 Capital Management, LLC
Position in PTGX — Protagonist Therapeutics, Inc
CIK 1404574
NEW YORK, NY
Position in PTGX
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$35,548,200
-$1,868,800 QoQ
Shares Held
290,000
-18.3% QoQ
Ownership
0.448%
of shares outstanding
% of Portfolio
3.42%
of 13F equity value
Holder Rank
#38
of 341 holders
Holding Since
Dec 2022
15 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in PTGX Over Time
Shares Held
Position Value (USD)
Derivatives in PTGX
reported options exposure · as of Mar 31, 2026CallValue
$1,591,540
CallShares
15,100
PutValue
$0
PutShares
0
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 Biotechnology
Healthcare · as of Jun 30, 2026683 Capital Management, LLC holds $349,034,024 across 34 Biotechnology names. PTGX ranks #2 (10.2% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ANAB |
Anaptysbio, Inc
|
660,000 | $44,550,000 | |
| 2 | PTGX |
Protagonist Therapeutics, Inc
This page
|
290,000 | $35,548,200 | |
| 3 | MGTX |
MeiraGTx Holdings plc
|
2,300,000 | $31,073,000 | |
| 4 | WVE |
Wave Life Sciences, Inc.
|
4,950,000 | $28,759,500 | |
| 5 | QURE |
uniQure N.V.
|
575,000 | $26,484,500 | |
| 6 | TGTX |
Tg Therapeutics, Inc.
|
389,081 | $21,376,110 | |
| 7 | PHAT |
Phathom Pharmaceuticals, Inc.
|
1,850,000 | $20,072,500 | |
| 8 | TRAX |
First Tracks Biotherapeutics, Inc.
|
750,000 | $15,090,000 |
All Filings in PTGX
Export CSV
18 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $35,548,200 | 290,000 | Shares | Defined | 2026-08-14 | |
| 2026-03-31 | $1,591,540 | 15,100 | Call | Defined | 2026-05-15 | |
| 2026-03-31 | $37,417,000 | 355,000 | Shares | Defined | 2026-05-15 | |
| 2025-12-31 | $33,247,630 | 380,669 | Shares | Defined | 2026-02-17 | |
| 2025-12-31 | $4,393,202 | 50,300 | Call | Defined | 2026-02-17 | |
| 2025-09-30 | $27,070,225 | 407,500 | Shares | Defined | 2025-11-14 | |
| 2025-06-30 | $24,595,150 | 445,000 | Shares | Defined | 2025-08-14 | |
| 2025-03-31 | $24,180,000 | 500,000 | Shares | Defined | 2025-05-15 | |
| 2024-12-31 | $15,826,000 | 410,000 | Shares | Defined | 2025-02-14 | |
| 2024-09-30 | $18,900,000 | 420,000 | Shares | Defined | 2024-11-14 | |
| 2024-06-30 | $20,944,157 | 604,449 | Shares | Defined | 2024-08-14 | |
| 2024-03-31 | $20,251,000 | 700,000 | Shares | Defined | 2024-05-15 | |
| 2023-12-31 | $16,394,950 | 715,000 | Shares | Defined | 2024-02-14 | |
| 2023-09-30 | $12,222,837 | 732,784 | Shares | Defined | 2023-11-14 | |
| 2023-06-30 | $22,482,680 | 814,000 | Shares | Defined | 2023-08-14 | |
| 2023-03-31 | $1,886,000 | 82,000 | Call | Defined | 2023-05-15 | |
| 2023-03-31 | $18,193,000 | 791,000 | Shares | Defined | 2023-05-15 | |
| 2022-12-31 | $2,267,098 | 207,800 | Shares | Defined | 2023-02-14 | |
| No filing history on record for this holder in this stock. | ||||||