PepGen (PEPG)
PepGen on one page: short interest, daily short volume, fails to deliver, large holders, 13F holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as pharmaceutical preparations.
3.8M
Short interest
settlement 2026-10-15
5.3
Days to cover
+0.5 days vs prior
44.4%
Short share of volume
2026-11-03
56,548
Fails to deliver
settlement 2026-10-06
Wed 11 Nov
Next earnings
estimated date
$0
Insider flow, 90 days
0 buys, 0 sells
As of 2026-11-03.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 15 October 2026, short interest in PEPG is 3,804,988 shares, down 66,215 shares over the last month. Over the last 48 readings it ranged from 675,579 shares (31 January 2025) to 5,170,291 shares (30 September 2025). At the reported average volume of 716K shares a day that is 5.3 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 3,804,988 | -9.9% | 716,142 | 5.31 |
| 2026-09-30 | 4,225,473 | +9.2% | 886,709 | 4.77 |
| 2026-09-15 | 3,871,203 | +4.8% | 741,550 | 5.22 |
| 2026-08-31 | 3,693,071 | -15.9% | 677,851 | 5.45 |
| 2026-08-14 | 4,390,736 | +6.9% | 1,427,088 | 3.08 |
| 2026-07-31 | 4,106,633 | -9.4% | 673,654 | 6.10 |
| 2026-07-15 | 4,533,674 | +13.3% | 1,551,129 | 2.92 |
| 2026-06-30 | 4,000,179 | +3.8% | 689,318 | 5.80 |
| 2026-06-15 | 3,852,545 | +2.9% | 542,383 | 7.10 |
| 2026-05-29 | 3,745,084 | +8.1% | 684,598 | 5.47 |
| 2026-05-15 | 3,464,146 | +8.1% | 1,032,940 | 3.35 |
| 2026-04-30 | 3,203,292 | -10.3% | 803,875 | 3.98 |
| 2026-04-15 | 3,570,181 | +3.8% | 1,949,167 | 1.83 |
| 2026-03-31 | 3,438,459 | +2.7% | 2,875,671 | 1.20 |
| 2026-03-13 | 3,347,565 | +26.1% | 969,026 | 3.45 |
| 2026-02-27 | 2,654,341 | -7.0% | 282,987 | 9.38 |
| 2026-02-13 | 2,853,367 | +2.7% | 903,452 | 3.16 |
| 2026-01-30 | 2,777,395 | +7.6% | 734,630 | 3.78 |
| 2026-01-15 | 2,582,008 | -6.5% | 719,389 | 3.59 |
| 2025-12-31 | 2,761,345 | +15.7% | 586,372 | 4.71 |
| 2025-12-15 | 2,387,190 | +3.7% | 634,938 | 3.76 |
| 2025-11-28 | 2,301,690 | +4.3% | 1,053,422 | 2.18 |
| 2025-11-14 | 2,206,702 | -4.8% | 513,862 | 4.29 |
| 2025-10-31 | 2,316,957 | -41.1% | 758,549 | 3.05 |
| 2025-10-15 | 3,935,441 | -23.9% | 1,352,867 | 2.91 |
| 2025-09-30 | 5,170,291 | +359.7% | 16,141,554 | 1.00 |
| 2025-09-15 | 1,124,688 | -0.8% | 513,833 | 2.19 |
| 2025-08-29 | 1,133,481 | -13.4% | 251,363 | 4.51 |
| 2025-08-15 | 1,309,202 | +5.0% | 435,186 | 3.01 |
| 2025-07-31 | 1,246,455 | -8.2% | 157,336 | 7.92 |
| 2025-07-15 | 1,357,893 | +1.9% | 297,047 | 4.57 |
| 2025-06-30 | 1,333,293 | -26.1% | 403,073 | 3.31 |
| 2025-06-13 | 1,803,461 | -6.5% | 130,987 | 13.77 |
| 2025-05-30 | 1,929,384 | -16.5% | 191,106 | 10.10 |
| 2025-05-15 | 2,309,489 | +3.3% | 245,973 | 9.39 |
| 2025-04-30 | 2,235,448 | -18.7% | 202,295 | 11.05 |
| 2025-04-15 | 2,749,522 | -3.3% | 264,286 | 10.40 |
| 2025-03-31 | 2,842,379 | -0.5% | 343,445 | 8.28 |
| 2025-03-14 | 2,857,342 | +1.6% | 851,837 | 3.35 |
| 2025-02-28 | 2,813,785 | +230.0% | 16,702,425 | 1.00 |
| 2025-02-14 | 852,547 | +26.2% | 685,574 | 1.24 |
| 2025-01-31 | 675,579 | -8.3% | 270,099 | 2.50 |
| 2025-01-15 | 736,568 | +6.1% | 122,266 | 6.02 |
| 2024-12-31 | 694,165 | -14.1% | 253,610 | 2.74 |
| 2024-12-13 | 808,074 | +4.3% | 307,261 | 2.63 |
| 2024-11-29 | 774,768 | +4.2% | 77,935 | 9.94 |
| 2024-11-15 | 743,266 | -7.4% | 206,291 | 3.60 |
| 2024-10-31 | 802,573 | -8.0% | 36,303 | 22.11 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 3 November 2026, the short share of PEPG volume is 44.4%, up 29.6 points over the last five sessions. Over the last 30 readings it ranged from 10.7% (28 October 2026) to 69.1% (30 September 2026). The latest reading is in line with the 30-session average of 43.8%, on 233K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-03 | 103K | 233K | 44.4% | 0 |
| 2026-11-02 | 84K | 208K | 40.5% | 101 |
| 2026-10-30 | 325K | 566K | 57.4% | 0 |
| 2026-10-29 | 38K | 280K | 13.5% | 0 |
| 2026-10-28 | 30K | 281K | 10.7% | 0 |
| 2026-10-27 | 83K | 558K | 14.8% | 0 |
| 2026-10-26 | 130K | 323K | 40.3% | 0 |
| 2026-10-23 | 127K | 334K | 38.1% | 200 |
| 2026-10-22 | 120K | 344K | 34.9% | 0 |
| 2026-10-21 | 191K | 456K | 41.9% | 200 |
| 2026-10-20 | 401K | 1.3M | 29.9% | 0 |
| 2026-10-19 | 166K | 424K | 39.1% | 0 |
| 2026-10-16 | 232K | 394K | 59.0% | 0 |
| 2026-10-15 | 143K | 234K | 61.1% | 0 |
| 2026-10-14 | 172K | 270K | 63.9% | 0 |
| 2026-10-13 | 259K | 408K | 63.6% | 2,403 |
| 2026-10-12 | 56K | 113K | 49.4% | 0 |
| 2026-10-09 | 143K | 239K | 59.7% | 0 |
| 2026-10-08 | 83K | 147K | 56.5% | 0 |
| 2026-10-07 | 115K | 294K | 39.0% | 0 |
| 2026-10-06 | 66K | 212K | 31.2% | 0 |
| 2026-10-05 | 87K | 245K | 35.4% | 0 |
| 2026-10-02 | 130K | 354K | 36.8% | 200 |
| 2026-10-01 | 172K | 369K | 46.5% | 505 |
| 2026-09-30 | 737K | 1.1M | 69.1% | 20,273 |
| 2026-09-29 | 785K | 1.2M | 64.5% | 10 |
| 2026-09-28 | 109K | 390K | 27.9% | 8,026 |
| 2026-09-25 | 82K | 204K | 40.2% | 345 |
| 2026-09-24 | 99K | 210K | 47.2% | 0 |
| 2026-09-23 | 139K | 235K | 58.9% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 6 October 2026, the fails-to-deliver balance in PEPG is 56,548 shares, up 56,251 shares over the last settlement date. Over the last 30 readings it ranged from 3 shares (10 April 2026) to 1,000,000 shares (16 April 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-10-06 | 56,548 | $2.36 | $133K |
| 2026-09-24 | 297 | $2.72 | $808 |
| 2026-09-23 | 1,096 | $2.98 | $3K |
| 2026-09-18 | 100 | $2.97 | $297 |
| 2026-09-10 | 14,058 | $3.15 | $44K |
| 2026-09-08 | 1,789 | $3.11 | $6K |
| 2026-09-04 | 1,274 | $3.18 | $4K |
| 2026-09-03 | 3,149 | $3.18 | $10K |
| 2026-09-02 | 237 | $3.12 | $739 |
| 2026-08-28 | 3,000 | $3.07 | $9K |
| 2026-08-27 | 635 | $3.22 | $2K |
| 2026-08-21 | 1,160 | $3.04 | $4K |
| 2026-08-04 | 2,354 | $1.88 | $4K |
| 2026-07-21 | 217 | $2.20 | $477 |
| 2026-07-17 | 5,404 | $2.25 | $12K |
| 2026-07-15 | 118 | $2.44 | $288 |
| 2026-07-14 | 15,837 | $2.44 | $39K |
| 2026-07-13 | 169 | $2.34 | $395 |
| 2026-07-07 | 250 | $1.89 | $473 |
| 2026-06-24 | 363 | $1.82 | $661 |
| 2026-06-17 | 922 | $1.59 | $1K |
| 2026-06-01 | 118 | $1.50 | $177 |
| 2026-05-27 | 14,220 | $1.53 | $22K |
| 2026-05-22 | 115 | $1.54 | $177 |
| 2026-05-13 | 56,457 | $1.68 | $95K |
| 2026-04-16 | 1,000,000 | $1.72 | $1.7M |
| 2026-04-10 | 3 | $1.61 | $5 |
| 2026-04-07 | 1,950 | $1.82 | $4K |
| 2026-04-06 | 76,824 | $1.73 | $133K |
| 2026-04-01 | 58,873 | $1.77 | $104K |
Insider trades
SEC Form 4, newest first. JSONNo open-market insider trades were reported for PEPG in the last 90 days. The most recent filings are listed below. Latest filing: Kasraian Kasra (Chief Technical Officer) on 2026-05-21.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-05-21 | Kasraian Kasra | Chief Technical Officer | Sell | 1K | $1.41 | $2K | 50K |
| 2026-03-04 | STRECK PAUL | EVP, Head of R&D | Sell | 47 | $6.29 | $296 | 76K |
| 2026-03-04 | STRECK PAUL | EVP, Head of R&D | Sell | 2K | $6.23 | $11K | 76K |
| 2026-03-04 | McArthur James G | President and CEO | Sell | 131 | $6.33 | $829 | 296K |
| 2026-03-04 | McArthur James G | President and CEO | Sell | 5K | $6.23 | $32K | 296K |
| 2026-03-04 | Donnelly Noel | Chief Financial Officer | Sell | 52 | $6.33 | $329 | 112K |
| 2026-03-04 | Donnelly Noel | Chief Financial Officer | Sell | 2K | $6.23 | $13K | 112K |
| 2026-03-01 | Vittiglio Joseph | Chief Business & Legal Officer | Grant | 31K | $0.00 | $0 | 66K |
| 2026-03-01 | STRECK PAUL | EVP, Head of R&D | Grant | 50K | $0.00 | $0 | 78K |
| 2026-03-01 | McArthur James G | President and CEO | Grant | 188K | $0.00 | $0 | 302K |
| 2026-03-01 | Kasraian Kasra | Chief Technical Officer | Grant | 35K | $0.00 | $0 | 51K |
| 2026-03-01 | Donnelly Noel | Chief Financial Officer | Grant | 77K | $0.00 | $0 | 114K |
| 2025-12-08 | Vittiglio Joseph | Chief Business & Legal Officer | Grant | 35K | $0.00 | $0 | 35K |
| 2025-09-30 | Oxford Science Enterprises plc | Former 10% Owner | Buy | 200K | $3.20 | $640K | 5.0M |
| 2025-09-26 | RA Capital Healthcare Fund LP | Director,TenPercentOwner | Buy | 9.4M | $3.20 | $30.0M | 18.6M |
| 2025-09-26 | RA CAPITAL MANAGEMENT, L.P. | Director, 10% owner | Buy | 9.4M | $3.20 | $30.0M | 18.6M |
| 2025-05-30 | STRECK PAUL | EVP, Head of R&D | Buy | 8K | $1.24 | $10K | 28K |
| 2025-05-20 | Kasraian Kasra | Chief Technical Officer | Grant | 17K | $0.00 | $0 | 17K |
| 2025-04-17 | McArthur James G | President and CEO | Buy | 10K | $1.36 | $14K | 114K |
| 2025-04-08 | McArthur James G | President and CEO | Buy | 42K | $1.15 | $48K | 104K |
| 2025-03-03 | McArthur James G | President and CEO | Grant | 61K | $0.00 | $0 | 62K |
| 2025-03-03 | STRECK PAUL | EVP, Head of R&D | Grant | 19K | $0.00 | $0 | 19K |
| 2025-03-03 | Donnelly Noel | Chief Financial Officer | Grant | 23K | $0.00 | $0 | 25K |
| 2025-03-03 | DeLena Mary Beth | General Counsel | Grant | 13K | $0.00 | $0 | 15K |
| 2025-02-26 | Donnelly Noel | Chief Financial Officer | Sell | 2K | $1.68 | $3K | 2K |
| 2025-02-26 | DeLena Mary Beth | General Counsel | Sell | 1K | $1.68 | $2K | 2K |
| 2025-02-24 | Donnelly Noel | Chief Financial Officer | Grant | 3K | $0.00 | $0 | 3K |
| 2025-02-24 | DeLena Mary Beth | General Counsel | Grant | 3K | $0.00 | $0 | 3K |
| 2024-07-25 | Mellion Michelle L | Chief Medical Officer | Sell | 8K | $18.06 | $137K | 0 |
| 2024-07-25 | Mellion Michelle L | Chief Medical Officer | Exercise or conversion | 8K | $10.21 | $77K | 8K |
| 2024-07-24 | Mellion Michelle L | Chief Medical Officer | Sell | 201 | $18.01 | $4K | 0 |
| 2024-07-24 | Mellion Michelle L | Chief Medical Officer | Exercise or conversion | 201 | $10.21 | $2K | 201 |
| 2024-07-18 | Mellion Michelle L | Chief Medical Officer | Exercise or conversion | 13K | $10.21 | $129K | 13K |
| 2024-07-18 | Mellion Michelle L | Chief Medical Officer | Sell | 13K | $18.20 | $230K | 0 |
| 2024-07-16 | Mellion Michelle L | Chief Medical Officer | Sell | 6K | $18.00 | $106K | 0 |
| 2024-07-16 | Mellion Michelle L | Chief Medical Officer | Exercise or conversion | 6K | $10.21 | $60K | 6K |
| 2024-07-12 | Mellion Michelle L | Chief Medical Officer | Sell | 3K | $18.04 | $59K | 0 |
| 2024-07-12 | Mellion Michelle L | Chief Medical Officer | Exercise or conversion | 3K | $10.21 | $34K | 3K |
| 2024-07-02 | Mellion Michelle L | Chief Medical Officer | Exercise or conversion | 37 | $10.21 | $378 | 37 |
| 2024-07-02 | Mellion Michelle L | Chief Medical Officer | Sell | 37 | $18.07 | $669 | 0 |
| 2024-07-01 | Mellion Michelle L | Chief Medical Officer | Exercise or conversion | 875 | $10.21 | $9K | 875 |
| 2024-07-01 | Mellion Michelle L | Chief Medical Officer | Sell | 875 | $18.01 | $16K | 0 |
| 2024-06-24 | Mellion Michelle L | Chief Medical Officer | Exercise or conversion | 9K | $10.21 | $95K | 9K |
| 2024-06-24 | Mellion Michelle L | Chief Medical Officer | Sell | 9K | $18.19 | $168K | 0 |
| 2024-06-12 | Mellion Michelle L | Chief Medical Officer | Exercise or conversion | 1K | $10.21 | $11K | 1K |
| 2024-06-12 | Mellion Michelle L | Chief Medical Officer | Sell | 1K | $18.06 | $20K | 0 |
| 2024-06-11 | Mellion Michelle L | Chief Medical Officer | Exercise or conversion | 500 | $10.21 | $5K | 500 |
| 2024-06-11 | Mellion Michelle L | Chief Medical Officer | Sell | 500 | $18.04 | $9K | 0 |
| 2024-06-06 | Mellion Michelle L | SVP, Clinical Development | Sell | 1K | $18.00 | $25K | 0 |
| 2024-06-06 | Mellion Michelle L | SVP, Clinical Development | Exercise or conversion | 1K | $10.21 | $14K | 1K |
| 2024-06-05 | Mellion Michelle L | SVP, Clinical Development | Exercise or conversion | 7K | $10.21 | $74K | 7K |
| 2024-06-05 | Mellion Michelle L | SVP, Clinical Development | Sell | 7K | $18.09 | $131K | 0 |
| 2024-05-17 | Svenstrup Niels | SVP, Chem. Mfg & Controls | Sell | 10K | $13.41 | $134K | 0 |
| 2024-02-09 | Kolchinsky Peter | Director,TenPercentOwner | Buy | 2.6M | $10.64 | $27.2M | 9.2M |
| 2023-11-30 | McArthur James G | President and CEO | Buy | 2K | $4.17 | $7K | 2K |
| 2023-06-08 | McArthur James G | President and CEO | Sell | 2K | $16.04 | $38K | 0 |
| 2023-06-08 | McArthur James G | President and CEO | Exercise or conversion | 2K | $2.71 | $6K | 2K |
| 2023-06-07 | McArthur James G | President and CEO | Sell | 8K | $16.23 | $137K | 0 |
| 2023-06-07 | McArthur James G | President and CEO | Exercise or conversion | 8K | $2.71 | $23K | 8K |
| 2023-06-06 | McArthur James G | President and CEO | Sell | 18K | $16.18 | $294K | 0 |
| 2023-06-06 | McArthur James G | President and CEO | Exercise or conversion | 18K | $2.71 | $49K | 18K |
| 2023-06-05 | McArthur James G | President and CEO | Exercise or conversion | 500 | $2.71 | $1K | 500 |
| 2023-06-05 | McArthur James G | President and CEO | Sell | 500 | $16.06 | $8K | 0 |
| 2023-06-02 | McArthur James G | President and CEO | Sell | 2K | $16.04 | $29K | 0 |
| 2023-06-02 | McArthur James G | President and CEO | Exercise or conversion | 2K | $2.71 | $5K | 2K |
| 2023-03-24 | Goyal Jaya | EVP, Res. & Preclin. Dev. | Sell | 392 | $20.00 | $8K | 0 |
| 2023-03-24 | Goyal Jaya | EVP, Res. & Preclin. Dev. | Exercise or conversion | 392 | $10.88 | $4K | 392 |
| 2023-02-08 | Goyal Jaya | EVP, Res. & Preclin. Dev. | Exercise or conversion | 644 | $10.88 | $7K | 644 |
| 2023-02-08 | Goyal Jaya | EVP, Res. & Preclin. Dev. | Sell | 644 | $17.00 | $11K | 0 |
| 2023-02-07 | Goyal Jaya | EVP, Res. & Preclin. Dev. | Exercise or conversion | 4K | $10.88 | $40K | 4K |
| 2023-02-07 | Goyal Jaya | EVP, Res. & Preclin. Dev. | Sell | 4K | $17.18 | $63K | 0 |
| 2023-02-06 | Goyal Jaya | EVP, Res. & Preclin. Dev. | Sell | 2K | $17.04 | $29K | 0 |
| 2023-02-06 | Goyal Jaya | EVP, Res. & Preclin. Dev. | Exercise or conversion | 2K | $10.88 | $18K | 2K |
| 2022-12-19 | Svenstrup Niels | SVP, Chem. Mfg & Controls | Exercise or conversion | 10K | $2.71 | $27K | 10K |
| 2022-05-10 | Oxford Science Enterprises plc | TenPercentOwner | Buy | 880K | $12.00 | $10.6M | 4.8M |
| 2022-05-10 | Deerfield Private Design Fund V, L.P. | TenPercentOwnerOther | Buy | 208K | $12.00 | $2.5M | 477K |
| 2022-05-10 | Deerfield Private Design Fund V, L.P. | TenPercentOwnerOther | Conversion | 268K | price not stated in the filing | not stated | 268K |
| 2022-05-10 | Oxford Science Enterprises plc | TenPercentOwner | Conversion | 946K | $0.00 | $0 | 2.3M |
| 2022-05-10 | Oxford Science Enterprises plc | TenPercentOwner | Conversion | 1.5M | $0.00 | $0 | 3.9M |
| 2022-05-10 | Oxford Science Enterprises plc | TenPercentOwner | Conversion | 1.3M | $0.00 | $0 | 1.4M |
| 2022-05-10 | Kolchinsky Peter | Director,TenPercentOwner | Conversion | 3.6M | price not stated in the filing | not stated | 3.6M |
| 2022-05-10 | Kolchinsky Peter | Director,TenPercentOwner | Buy | 250K | $12.00 | $3.0M | 1.3M |
| 2022-05-10 | Kolchinsky Peter | Director,TenPercentOwner | Conversion | 208K | price not stated in the filing | not stated | 208K |
| 2022-05-10 | Kolchinsky Peter | Director,TenPercentOwner | Conversion | 1.1M | price not stated in the filing | not stated | 1.1M |
| 2022-05-10 | Kolchinsky Peter | Director,TenPercentOwner | Buy | 3.0M | $12.00 | $35.8M | 6.6M |
| 2022-05-06 | KEATING LAURIE | Director | Buy | 4K | $12.00 | $50K | 4K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON17 holders report 5% or more of PEPG in their latest filing, 4 on Schedule 13D (active intent). The largest reported stake is RA Capital Management, L.P. at 29.2% of the class (20,099,753 shares), filed 2025-09-30 for an event on 2025-09-26.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-05-15 | 13G/Ano. 1 | Commodore Capital LPinvestment adviser, partnership | 4.5M | 6.5% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 1 | Michael Kramarzparent holding company, individual | 4.5M | 6.5% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 1 | Robert Egen Atkinsonparent holding company, individual | 4.5M | 6.5% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 1 | Commodore Capital Master LPpartnership | 4.5M | 6.5% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 1 | Viking Global Opportunities GP LLCother entity | 3.5M | 5.0% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 1 | Viking Global Opportunities Parent GP LLCother entity | 3.5M | 5.0% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 1 | VIKING GLOBAL INVESTORS LPpartnership | 3.5M | 5.0% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 1 | Shabet Rose Sharonindividual | 3.5M | 5.0% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 1 | HALVORSEN OLE ANDREASindividual | 3.5M | 5.0% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 1 | Viking Global Opportunities Illiquid Investments Sub-Master LPpartnership | 3.5M | 5.0% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 1 | Viking Global Opportunities Portfolio GP LLCother entity | 3.5M | 5.0% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 1 | KAVRA 16 LLCother entity | 1.0M | 1.5% | 2026-03-31 |
| 2025-11-14 | 13G/Ano. 2 | Point72 Asset Management, L.P.partnership | 2.1M | 3.0% | 2025-09-30 |
| 2025-11-14 | 13G/Ano. 2 | Point72 Capital Advisors, Inc.corporation | 2.1M | 3.0% | 2025-09-30 |
| 2025-11-14 | 13G/Ano. 2 | Steven A. Cohenindividual | 2.1M | 3.0% | 2025-09-30 |
| 2025-10-03 | 13G | Ott David C.individual | 3.5M | 5.1% | 2025-09-26 |
| 2025-10-01 | 13G/Ano. 1 | Oxford Science Enterprises plccorporation | 5.0M | 7.2% | 2025-09-30 |
| 2025-09-30 | 13D/Ano. 4 | RA Capital Management, L.P.investment adviser, partnership | 20.1M | 29.2% | 2025-09-26 |
| 2025-09-30 | 13D/Ano. 4 | Peter Kolchinskyparent holding company, individual | 20.1M | 29.2% | 2025-09-26 |
| 2025-09-30 | 13D/Ano. 4 | Rajeev Shahparent holding company, individual | 20.1M | 29.2% | 2025-09-26 |
| 2025-09-30 | 13D/Ano. 4 | RA Capital Healthcare Fund, L.P.partnership | 18.6M | 27.0% | 2025-09-26 |
13F holders
Tracked managers holding PEPG at their latest 13F. JSON6 of the 30 tracked managers held PEPG at their latest 13F, $13.6M in total at quarter-end prices. Viking Global Investors is the largest at $6.3M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 3 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Viking Global Investors | 2026-06-30 | 3.5M | $6.3M | 0.02% | 0 |
| Millennium Management | 2026-06-30 | 1.8M | $3.2M | 0.00% | -292K |
| Renaissance Technologies | 2026-06-30 | 1.5M | $2.7M | 0.00% | +1.5M |
| Citadel Advisors | 2026-06-30 | 658K | $1.2M | 0.00% | +450K |
| Two Sigma Investments | 2026-06-30 | 66K | $119K | 0.00% | -115K |
| Point72 Asset Management | 2026-06-30 | 40K | $71K | 0.00% | -26K |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
What this page is
PepGen in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows PepGen (PEPG), SEC CIK 1835597, listed on Nasdaq, classified by the SEC as pharmaceutical preparations. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-11-03.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-10-06.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-05-15.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-06.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-05-21.JSON and CSV
- Company record
- EDGAR filing index for CIK 1835597Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
Other companies the SEC classifies as pharmaceutical preparations
Other company pages
Datasets
Frequently Asked Questions
How much of PEPG is sold short?
3,804,988 shares were held short at the 2026-10-15 settlement, 5.3 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is PEPG's daily short volume?
On 2026-11-03, 103,316 of the 232,574 PEPG shares reported to FINRA were sold short, 44.4% of the day's reported volume. Short volume is a flow for one day, not a position.
Does PEPG have fails to deliver?
The SEC's latest file shows 56,548 PEPG shares failed to deliver at settlement 2026-10-06. Fails are reported per settlement date and published twice a month with a lag.
Are PEPG insiders buying or selling?
No open-market insider trades were reported for PEPG in the last 90 days. The most recent filings are listed below. Latest filing: Kasraian Kasra (Chief Technical Officer) on 2026-05-21.
Who owns 5% or more of PEPG?
17 holders report 5% or more of PEPG in their latest filing, 4 on Schedule 13D (active intent). The largest reported stake is RA Capital Management, L.P. at 29.2% of the class (20,099,753 shares), filed 2025-09-30 for an event on 2025-09-26.
Which tracked 13F managers own PEPG?
6 of the 30 tracked 13F managers held PEPG shares at their latest filing, $13.6M in all. The largest: Andreas Halvorsen's Viking Global Investors (3.5M shares, $6.3M), Izzy Englander's Millennium Management (1.8M shares, $3.2M), Renaissance Technologies (1.5M shares, $2.7M), Ken Griffin's Citadel Advisors (658K shares, $1.2M), Two Sigma Investments (66K shares, $119K), Steve Cohen's Point72 Asset Management (40K shares, $71K).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.