Bolt Biotherapeutics (BOLT)
Bolt Biotherapeutics 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.
16K
Short interest
settlement 2026-10-15
1.0
Days to cover
unchanged vs prior
47.1%
Short share of volume
2026-11-02
9
Fails to deliver
settlement 2026-09-23
Wed 11 Nov
Next earnings
estimated date
-$128K
Insider flow, 90 days
0 buys, 9 sells
As of 2026-11-02.
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 BOLT is 15,751 shares, down 2,735 shares over the last month. Over the last 48 readings it ranged from 352 shares (31 December 2025) to 430,335 shares (30 May 2025). The latest reading sits at the bottom of that range. At the reported average volume of 26K shares a day that is 1.0 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 15,751 | -38.8% | 26,150 | 1.00 |
| 2026-09-30 | 25,736 | +39.2% | 42,277 | 1.00 |
| 2026-09-15 | 18,486 | +18.7% | 30,445 | 1.00 |
| 2026-08-31 | 15,579 | +1923.3% | 17,581 | 1.00 |
| 2026-08-14 | 770 | -79.5% | 34,611 | 1.00 |
| 2026-07-31 | 3,749 | -34.9% | 12,715 | 1.00 |
| 2026-07-15 | 5,761 | -65.5% | 17,142 | 1.00 |
| 2026-06-30 | 16,698 | -38.7% | 39,560 | 1.00 |
| 2026-06-15 | 27,250 | +107.6% | 24,781 | 1.10 |
| 2026-05-29 | 13,125 | +8.2% | 34,638 | 1.00 |
| 2026-05-15 | 12,126 | +73.3% | 23,966 | 1.00 |
| 2026-04-30 | 6,999 | -69.2% | 33,057 | 1.00 |
| 2026-04-15 | 22,704 | +355.3% | 21,902 | 1.04 |
| 2026-03-31 | 4,987 | +449.2% | 16,938 | 1.00 |
| 2026-03-13 | 908 | -51.6% | 16,950 | 1.00 |
| 2026-02-27 | 1,878 | +190.3% | 32,271 | 1.00 |
| 2026-02-13 | 647 | -59.6% | 34,299 | 1.00 |
| 2026-01-30 | 1,603 | -36.9% | 22,976 | 1.00 |
| 2026-01-15 | 2,541 | +621.9% | 25,320 | 1.00 |
| 2025-12-31 | 352 | -83.8% | 32,280 | 1.00 |
| 2025-12-15 | 2,177 | +88.0% | 82,197 | 1.00 |
| 2025-11-28 | 1,158 | -91.6% | 21,973 | 1.00 |
| 2025-11-14 | 13,810 | +792.7% | 45,085 | 1.00 |
| 2025-10-31 | 1,547 | -69.9% | 21,508 | 1.00 |
| 2025-10-15 | 5,136 | -93.1% | 53,531 | 1.00 |
| 2025-09-30 | 74,457 | -3.9% | 19,315 | 3.85 |
| 2025-09-15 | 77,472 | -0.7% | 7,751 | 10.00 |
| 2025-08-29 | 78,005 | +6.9% | 13,860 | 5.63 |
| 2025-08-15 | 72,941 | -7.2% | 13,121 | 5.56 |
| 2025-07-31 | 78,597 | -9.6% | 22,783 | 3.45 |
| 2025-07-15 | 86,937 | +26.9% | 21,602 | 4.02 |
| 2025-06-30 | 68,503 | +197.5% | 20,006 | 3.42 |
| 2025-06-13 | 23,027 | -94.7% | 29,466 | 1.00 |
| 2025-05-30 | 430,335 | +67.8% | 1,333,500 | 1.00 |
| 2025-05-15 | 256,527 | -3.1% | 123,942 | 2.07 |
| 2025-04-30 | 264,862 | -15.3% | 107,634 | 2.46 |
| 2025-04-15 | 312,832 | +26.9% | 145,128 | 2.16 |
| 2025-03-31 | 246,567 | +913.3% | 166,900 | 1.48 |
| 2025-03-14 | 24,333 | -37.4% | 108,636 | 1.00 |
| 2025-02-28 | 38,888 | -68.0% | 77,626 | 1.00 |
| 2025-02-14 | 121,399 | +14.4% | 125,569 | 1.00 |
| 2025-01-31 | 106,124 | -8.8% | 124,143 | 1.00 |
| 2025-01-15 | 116,404 | -3.8% | 181,063 | 1.00 |
| 2024-12-31 | 121,000 | +102.9% | 228,426 | 1.00 |
| 2024-12-13 | 59,643 | -50.7% | 169,021 | 1.00 |
| 2024-11-29 | 120,910 | +19.2% | 147,372 | 1.00 |
| 2024-11-15 | 101,425 | +53.7% | 93,547 | 1.08 |
| 2024-10-31 | 65,990 | -44.8% | 158,022 | 1.00 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 2 November 2026, the short share of BOLT volume is 47.1%, up 7.7 points over the last five sessions. Over the last 30 readings it ranged from 3.5% (24 September 2026) to 74.6% (5 October 2026). The latest reading is 5.1 points above the 30-session average of 42.1%, on 12K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-02 | 6K | 12K | 47.1% | 0 |
| 2026-10-30 | 18K | 68K | 26.4% | 1,961 |
| 2026-10-29 | 10K | 26K | 38.3% | 0 |
| 2026-10-28 | 8K | 23K | 36.4% | 0 |
| 2026-10-27 | 21K | 76K | 28.2% | 6,470 |
| 2026-10-26 | 72K | 181K | 39.5% | 5,156 |
| 2026-10-23 | 4.0M | 7.0M | 57.0% | 59,439 |
| 2026-10-22 | 3K | 10K | 30.7% | 0 |
| 2026-10-21 | 6K | 17K | 37.4% | 0 |
| 2026-10-20 | 4K | 8K | 46.9% | 0 |
| 2026-10-19 | 2K | 7K | 32.5% | 0 |
| 2026-10-16 | 742 | 5K | 13.7% | 0 |
| 2026-10-15 | 2K | 5K | 34.7% | 1,015 |
| 2026-10-14 | 8K | 24K | 32.2% | 1,246 |
| 2026-10-13 | 2K | 7K | 34.1% | 0 |
| 2026-10-12 | 5K | 15K | 30.5% | 0 |
| 2026-10-09 | 25K | 47K | 53.6% | 0 |
| 2026-10-08 | 3K | 8K | 37.4% | 0 |
| 2026-10-07 | 21K | 34K | 61.1% | 0 |
| 2026-10-06 | 5K | 11K | 50.6% | 0 |
| 2026-10-05 | 6K | 8K | 74.6% | 0 |
| 2026-10-02 | 182 | 345 | 52.8% | 0 |
| 2026-10-01 | 2K | 4K | 47.1% | 0 |
| 2026-09-30 | 4K | 7K | 52.1% | 0 |
| 2026-09-29 | 5K | 7K | 69.5% | 0 |
| 2026-09-28 | 8K | 16K | 48.1% | 0 |
| 2026-09-25 | 264 | 4K | 7.5% | 0 |
| 2026-09-24 | 494 | 14K | 3.5% | 0 |
| 2026-09-23 | 1K | 2K | 65.6% | 0 |
| 2026-09-22 | 9K | 13K | 73.1% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 23 September 2026, the fails-to-deliver balance in BOLT is 9 shares, down 48 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (13 June 2025) to 14,506 shares (10 June 2025). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-23 | 9 | $3.71 | $33 |
| 2026-09-14 | 57 | $3.85 | $219 |
| 2026-08-24 | 1,401 | $3.69 | $5K |
| 2026-02-27 | 285 | $4.74 | $1K |
| 2025-10-14 | 1,577 | $5.93 | $9K |
| 2025-10-03 | 1,962 | $4.96 | $10K |
| 2025-09-25 | 450 | $5.77 | $3K |
| 2025-09-24 | 86 | $5.55 | $477 |
| 2025-09-18 | 430 | $5.37 | $2K |
| 2025-09-11 | 40 | $5.37 | $215 |
| 2025-09-08 | 1,152 | $5.19 | $6K |
| 2025-09-05 | 7,095 | $4.84 | $34K |
| 2025-09-04 | 7,095 | $4.91 | $35K |
| 2025-09-03 | 7,095 | $5.15 | $37K |
| 2025-08-28 | 239 | $5.35 | $1K |
| 2025-08-27 | 826 | $5.32 | $4K |
| 2025-08-26 | 1,308 | $5.13 | $7K |
| 2025-08-19 | 174 | $5.07 | $882 |
| 2025-08-18 | 7,404 | $5.15 | $38K |
| 2025-08-15 | 8,313 | $5.44 | $45K |
| 2025-08-01 | 10,000 | $5.48 | $55K |
| 2025-07-31 | 10,000 | $5.81 | $58K |
| 2025-06-26 | 1,270 | $5.67 | $7K |
| 2025-06-18 | 683 | $5.66 | $4K |
| 2025-06-17 | 2,270 | $5.77 | $13K |
| 2025-06-16 | 1 | $6.06 | $6 |
| 2025-06-13 | 1 | $6.30 | $6 |
| 2025-06-12 | 2 | $6.53 | $13 |
| 2025-06-11 | 2,094 | $6.74 | $14K |
| 2025-06-10 | 14,506 | $6.14 | $89K |
Insider trades
SEC Form 4, newest first. JSONInsiders at BOLT reported 9 open-market sells worth $128K in the last 90 days and no open-market buys. Latest filing: GUJRATHI SHEILA (Chief Strategy Officer) on 2026-10-23.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-10-23 | GUJRATHI SHEILA | Chief Strategy Officer | Grant | 13K | $0.00 | $0 | 13K |
| 2026-10-23 | GUJRATHI SHEILA | Chief Strategy Officer | Grant | 73K | $0.00 | $0 | 73K |
| 2026-09-18 | Quinn William P. | President, CEO and CFO | Sell | 9K | $3.24 | $30K | 25K |
| 2026-09-18 | Nemec Sarah | Senior VP, Finance and PAO | Sell | 4K | $3.24 | $13K | 17K |
| 2026-09-18 | Yonehiro Grant | Chief Operating Officer | Sell | 7K | $3.24 | $22K | 17K |
| 2026-09-17 | Quinn William P. | President, CEO and CFO | Sell | 7K | $3.32 | $22K | 35K |
| 2026-09-17 | Nemec Sarah | Senior VP, Finance and PAO | Sell | 3K | $3.32 | $10K | 21K |
| 2026-09-17 | Yonehiro Grant | Chief Operating Officer | Sell | 5K | $3.32 | $16K | 24K |
| 2026-09-16 | Quinn William P. | President, CEO and CFO | Sell | 2K | $3.77 | $7K | 41K |
| 2026-09-16 | Nemec Sarah | Senior VP, Finance and PAO | Sell | 843 | $3.77 | $3K | 24K |
| 2026-09-16 | Yonehiro Grant | Chief Operating Officer | Sell | 1K | $3.77 | $5K | 29K |
| 2026-06-05 | Quinn William P. | President, CEO and CFO | Buy | 637 | $3.88 | $2K | 3K |
| 2026-06-05 | Nemec Sarah | Senior VP, Finance and PAO | Buy | 509 | $3.88 | $2K | 2K |
| 2025-12-05 | Quinn William P. | President, CEO and CFO | Buy | 125 | $4.61 | $576 | 2K |
| 2025-12-05 | Nemec Sarah | Senior VP, Finance and PAO | Buy | 125 | $4.61 | $576 | 1K |
| 2025-10-22 | Nemec Sarah | Senior VP, Finance and PAO | Grant | 23K | $0.00 | $0 | 24K |
| 2025-10-22 | Yonehiro Grant | Chief Operating Officer | Grant | 30K | $0.00 | $0 | 39K |
| 2025-10-22 | Quinn William P. | President, CEO and CFO | Grant | 40K | $0.00 | $0 | 42K |
| 2025-06-06 | Nemec Sarah | Senior VP, Finance and PAO | Buy | 125 | $5.49 | $687 | 943 |
| 2025-06-06 | Quinn William P. | President, CEO and CFO | Buy | 125 | $5.49 | $687 | 2K |
| 2024-12-16 | Quinn William P. | President, CEO and CFO | Buy | 3K | $0.50 | $1K | 41K |
| 2024-12-16 | Nemec Sarah | Senior VP, Finance and PAO | Buy | 3K | $0.50 | $1K | 17K |
| 2024-06-06 | Quinn William P. | President, CEO and CFO | Buy | 3K | $0.64 | $2K | 39K |
| 2024-06-06 | Nemec Sarah | Senior VP, Finance and PAO | Buy | 3K | $0.64 | $2K | 14K |
| 2023-12-12 | Quinn William P. | Chief Financial Officer | Buy | 8K | $0.95 | $7K | 36K |
| 2023-12-06 | Quinn William P. | Chief Financial Officer | Buy | 3K | $0.78 | $2K | 29K |
| 2023-11-30 | ENGLEMAN EDGAR | Director | Sell | 108K | $0.86 | $93K | 1.8M |
| 2023-11-30 | ENGLEMAN EDGAR | Director | Sell | 15K | $0.86 | $13K | 252K |
| 2023-11-29 | ENGLEMAN EDGAR | Director | Sell | 3K | $0.91 | $3K | 266K |
| 2023-11-29 | ENGLEMAN EDGAR | Director | Sell | 23K | $0.91 | $21K | 1.9M |
| 2023-11-21 | Vivo Capital VIII, LLC | TenPercentOwner | Sell | 1K | $0.90 | $1K | 112K |
| 2023-11-21 | Vivo Capital VIII, LLC | TenPercentOwner | Sell | 2K | $0.90 | $2K | 2.0M |
| 2023-11-21 | Vivo Capital VIII, LLC | TenPercentOwner | Sell | 236 | $0.90 | $212 | 270K |
| 2023-11-21 | ENGLEMAN EDGAR | Director | Sell | 2K | $0.90 | $2K | 2.0M |
| 2023-11-21 | ENGLEMAN EDGAR | Director | Sell | 236 | $0.90 | $212 | 270K |
| 2023-11-20 | Vivo Capital Surplus Fund VIII, L.P. | TenPercentOwner | Sell | 27K | $0.92 | $25K | 2.0M |
| 2023-11-20 | Vivo Capital Surplus Fund VIII, L.P. | TenPercentOwner | Sell | 4K | $0.92 | $3K | 270K |
| 2023-11-20 | Vivo Capital Surplus Fund VIII, L.P. | TenPercentOwner | Sell | 23K | $0.92 | $22K | 113K |
| 2023-11-20 | ENGLEMAN EDGAR | Director | Sell | 27K | $0.92 | $25K | 2.0M |
| 2023-11-20 | ENGLEMAN EDGAR | Director | Sell | 4K | $0.92 | $3K | 270K |
| 2023-11-17 | Vivo Capital Surplus Fund VIII, L.P. | TenPercentOwner | Sell | 8K | $0.93 | $8K | 2.0M |
| 2023-11-17 | Vivo Capital Surplus Fund VIII, L.P. | TenPercentOwner | Sell | 7K | $0.93 | $7K | 137K |
| 2023-11-17 | Vivo Capital Surplus Fund VIII, L.P. | TenPercentOwner | Sell | 1K | $0.93 | $1K | 274K |
| 2023-11-17 | ENGLEMAN EDGAR | Director | Sell | 8K | $0.93 | $8K | 2.0M |
| 2023-11-17 | ENGLEMAN EDGAR | Director | Sell | 1K | $0.93 | $1K | 274K |
| 2023-11-16 | Vivo Capital Surplus Fund VIII, L.P. | TenPercentOwner | Sell | 6K | $0.96 | $6K | 144K |
| 2023-11-16 | Vivo Capital Surplus Fund VIII, L.P. | TenPercentOwner | Sell | 1K | $0.96 | $998 | 275K |
| 2023-11-16 | Vivo Capital Surplus Fund VIII, L.P. | TenPercentOwner | Sell | 8K | $0.96 | $7K | 2.0M |
| 2023-11-16 | ENGLEMAN EDGAR | Director | Sell | 8K | $0.96 | $7K | 2.0M |
| 2023-11-16 | ENGLEMAN EDGAR | Director | Sell | 1K | $0.96 | $998 | 275K |
| 2023-06-06 | Quinn William P. | Chief Financial Officer | Buy | 2K | $1.18 | $2K | 26K |
| 2022-07-13 | Novo Holdings A/S | TenPercentOwner | Sell | 800K | $2.00 | $1.6M | 3.7M |
| 2021-12-22 | Perez Edith A. | Chief Medical Officer | Exercise or conversion | 36K | $2.80 | $100K | 37K |
| 2021-12-08 | Quinn William P. | Chief Financial Officer | Buy | 5K | $4.72 | $24K | 20K |
| 2021-12-06 | Perez Edith A. | Chief Medical Officer | Buy | 411 | $4.64 | $2K | 1K |
| 2021-12-06 | Quinn William P. | Chief Financial Officer | Buy | 35 | $4.64 | $162 | 15K |
| 2021-06-04 | Perez Edith A. | Chief Medical Officer | Buy | 917 | $16.65 | $15K | 917 |
| 2021-06-04 | Quinn William P. | Chief Financial Officer | Buy | 1K | $16.65 | $20K | 15K |
| 2021-02-09 | Schatzman Randall C | Chief Executive Officer | Buy | 2K | $20.00 | $30K | 2K |
| 2021-02-09 | Quinn William P. | Chief Financial Officer | Buy | 1K | $20.00 | $24K | 14K |
| 2021-02-09 | ENGLEMAN EDGAR | Director,TenPercentOwner | Exercise (in or at the money) | 6K | $0.07 | $396 | 252K |
| 2021-02-09 | ENGLEMAN EDGAR | Director,TenPercentOwner | Conversion | 48K | price not stated in the filing | not stated | 246K |
| 2021-02-09 | ENGLEMAN EDGAR | Director,TenPercentOwner | Conversion | 44K | price not stated in the filing | not stated | 198K |
| 2021-02-09 | ENGLEMAN EDGAR | Director,TenPercentOwner | Conversion | 151K | price not stated in the filing | not stated | 154K |
| 2021-02-09 | ENGLEMAN EDGAR | Director,TenPercentOwner | Buy | 176K | $20.00 | $3.5M | 2.0M |
| 2021-02-09 | ENGLEMAN EDGAR | Director,TenPercentOwner | Conversion | 1.1M | price not stated in the filing | not stated | 1.1M |
| 2021-02-09 | ENGLEMAN EDGAR | Director,TenPercentOwner | Exercise (in or at the money) | 41K | $0.07 | $3K | 1.8M |
| 2021-02-09 | ENGLEMAN EDGAR | Director,TenPercentOwner | Sell | 144 | $20.00 | $3K | 1.8M |
| 2021-02-09 | ENGLEMAN EDGAR | Director,TenPercentOwner | Conversion | 318K | price not stated in the filing | not stated | 1.4M |
| 2021-02-09 | ENGLEMAN EDGAR | Director,TenPercentOwner | Conversion | 346K | price not stated in the filing | not stated | 1.8M |
| 2021-02-09 | ENGLEMAN EDGAR | Director,TenPercentOwner | Sell | 20 | $20.00 | $400 | 252K |
| 2021-02-09 | ENGLEMAN EDGAR | Director,TenPercentOwner | Buy | 24K | $20.00 | $485K | 276K |
| 2021-02-09 | Khanna Ashish Siri Ram | Director | Buy | 1K | $20.00 | $20K | 1K |
| 2021-02-09 | Khanna Ashish Siri Ram | Director | Buy | 1K | $20.00 | $24K | 1K |
| 2021-02-09 | HEALY JAMES | Director | Buy | 450K | $20.00 | $9.0M | 2.8M |
| 2021-02-09 | HEALY JAMES | Director | Conversion | 1.2M | price not stated in the filing | not stated | 2.3M |
| 2021-02-09 | HEALY JAMES | Director | Conversion | 1.1M | price not stated in the filing | not stated | 1.1M |
| 2021-02-09 | SHAH MAHENDRA | Director | Sell | 62 | $20.00 | $1K | 1.4M |
| 2021-02-09 | SHAH MAHENDRA | Director | Exercise (in or at the money) | 18K | $0.07 | $1K | 1.4M |
| 2021-02-09 | SHAH MAHENDRA | Director | Conversion | 944K | price not stated in the filing | not stated | 958K |
| 2021-02-09 | SHAH MAHENDRA | Director | Conversion | 472K | price not stated in the filing | not stated | 1.4M |
| 2021-02-09 | LAPORTE KATHLEEN | Director | Buy | 1K | $20.00 | $24K | 1K |
| 2021-02-09 | Vivo Panda Fund, L.P. | TenPercentOwner | Sell | 144 | $20.00 | $3K | 1.8M |
| 2021-02-09 | Vivo Panda Fund, L.P. | TenPercentOwner | Exercise (in or at the money) | 41K | $0.07 | $3K | 1.8M |
| 2021-02-09 | Vivo Panda Fund, L.P. | TenPercentOwner | Conversion | 346K | price not stated in the filing | not stated | 1.8M |
| 2021-02-09 | Vivo Panda Fund, L.P. | TenPercentOwner | Conversion | 318K | price not stated in the filing | not stated | 1.4M |
| 2021-02-09 | Vivo Panda Fund, L.P. | TenPercentOwner | Conversion | 1.1M | price not stated in the filing | not stated | 1.1M |
| 2021-02-09 | Vivo Panda Fund, L.P. | TenPercentOwner | Sell | 62 | $20.00 | $1K | 1.4M |
| 2021-02-09 | Vivo Panda Fund, L.P. | TenPercentOwner | Exercise (in or at the money) | 18K | $0.07 | $1K | 1.4M |
| 2021-02-09 | Vivo Panda Fund, L.P. | TenPercentOwner | Conversion | 472K | price not stated in the filing | not stated | 1.4M |
| 2021-02-09 | Vivo Panda Fund, L.P. | TenPercentOwner | Buy | 176K | $20.00 | $3.5M | 2.0M |
| 2021-02-09 | Vivo Panda Fund, L.P. | TenPercentOwner | Conversion | 151K | price not stated in the filing | not stated | 154K |
| 2021-02-09 | Vivo Panda Fund, L.P. | TenPercentOwner | Conversion | 44K | price not stated in the filing | not stated | 198K |
| 2021-02-09 | Vivo Panda Fund, L.P. | TenPercentOwner | Conversion | 48K | price not stated in the filing | not stated | 246K |
| 2021-02-09 | Vivo Panda Fund, L.P. | TenPercentOwner | Exercise (in or at the money) | 6K | $0.07 | $396 | 252K |
| 2021-02-09 | Vivo Panda Fund, L.P. | TenPercentOwner | Sell | 20 | $20.00 | $400 | 252K |
| 2021-02-09 | Vivo Panda Fund, L.P. | TenPercentOwner | Buy | 24K | $20.00 | $485K | 276K |
| 2021-02-09 | Vivo Panda Fund, L.P. | TenPercentOwner | Buy | 150K | $20.00 | $3.0M | 150K |
| 2021-02-09 | Vivo Panda Fund, L.P. | TenPercentOwner | Conversion | 944K | price not stated in the filing | not stated | 958K |
| 2021-02-09 | Sofinnova Management X, L.L.C. | TenPercentOwner | Conversion | 1.2M | price not stated in the filing | not stated | 2.3M |
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. JSON2 holders report 5% or more of BOLT in their latest filing, all on Schedule 13G (passive). The largest reported stake is Renaissance Technologies Holdings Corporation at 5.1% of the class (98,625 shares), filed 2026-08-13 for an event on 2026-06-24.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-08-13 | 13G | Renaissance Technologies Holdings Corporationparent holding company | 99K | 5.1% | 2026-06-24 |
| 2026-08-13 | 13G | Renaissance Technologies LLCinvestment adviser | 99K | 5.1% | 2026-06-24 |
| 2026-02-26 | 13D/Ano. 4 | NF Investment Holdings Limitedcorporation | 87K | 4.6% | 2026-02-24 |
| 2026-02-26 | 13D/Ano. 4 | Nan Fung Group Holdings Limitedcorporation | 87K | 4.6% | 2026-02-24 |
| 2026-02-26 | 13D/Ano. 4 | Nan Fung Life Sciences Holdings Limitedcorporation | 82K | 4.3% | 2026-02-24 |
| 2026-02-26 | 13D/Ano. 4 | Pivotal bioVenture Partners Fund I, L.P.partnership | 53K | 2.7% | 2026-02-24 |
| 2026-02-26 | 13D/Ano. 4 | Pivotal bioVenture Partners Fund I G.P., L.P.partnership | 53K | 2.7% | 2026-02-24 |
| 2026-02-26 | 13D/Ano. 4 | Pivotal bioVenture Partners Fund I U.G.P. Ltd.corporation | 53K | 2.7% | 2026-02-24 |
| 2026-02-26 | 13D/Ano. 4 | Pivotal Partners Ltdcorporation | 53K | 2.7% | 2026-02-24 |
| 2026-02-26 | 13D/Ano. 4 | Pivotal Life Sciences Holdings Limitedcorporation | 53K | 2.7% | 2026-02-24 |
| 2026-02-26 | 13D/Ano. 4 | NFLS Beta Limitedcorporation | 30K | 1.6% | 2026-02-24 |
| 2026-02-26 | 13D/Ano. 4 | NFLS Platform Holdings Limitedcorporation | 30K | 1.6% | 2026-02-24 |
| 2026-02-26 | 13D/Ano. 4 | Permwell Management Limitedcorporation | 5K | 0.3% | 2026-02-24 |
| 2026-02-13 | 13G/Ano. 2 | Vivo Panda, LLCother entity | 72K | 3.8% | 2025-12-31 |
| 2026-02-13 | 13G/Ano. 2 | Vivo Panda Fund, L.P.partnership | 72K | 3.8% | 2025-12-31 |
| 2026-02-13 | 13G/Ano. 2 | Vivo Capital VIII, LLCother entity | 0 | 0.0% | 2025-12-31 |
| 2026-02-13 | 13G/Ano. 2 | Vivo Capital Fund VIII, L.P.partnership | 0 | 0.0% | 2025-12-31 |
| 2026-02-13 | 13G/Ano. 2 | Vivo Capital Surplus Fund VIII, L.P.partnership | 0 | 0.0% | 2025-12-31 |
| 2025-11-14 | 13G/Ano. 4 | KEVIN TANGindividual | 67K | 3.5% | 2025-09-30 |
| 2025-11-14 | 13G/Ano. 4 | TANG CAPITAL MANAGEMENT, LLCother entity | 67K | 3.5% | 2025-09-30 |
| 2025-11-14 | 13G/Ano. 4 | TANG CAPITAL PARTNERS, LPpartnership | 38K | 2.0% | 2025-09-30 |
| 2025-11-14 | 13G/Ano. 4 | TANG CAPITAL PARTNERS INTERNATIONAL, LPpartnership | 29K | 1.5% | 2025-09-30 |
| 2025-11-14 | 13G/Ano. 4 | TANG CAPITAL PARTNERS IV, INCcorporation | 0 | 0.0% | 2025-09-30 |
| 2025-11-14 | 13G/Ano. 4 | TANG CAPITAL PARTNERS III, INCcorporation | 0 | 0.0% | 2025-09-30 |
13F holders
Tracked managers holding BOLT at their latest 13F. JSON2 of the 30 tracked managers held BOLT at their latest 13F, $599K in total at quarter-end prices. Renaissance Technologies is the largest at $380K (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 0 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Renaissance Technologies | 2026-06-30 | 99K | $380K | 0.00% | +21K |
| Citadel Advisors | 2026-06-30 | 57K | $219K | 0.00% | +47K |
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
Bolt Biotherapeutics 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 Bolt Biotherapeutics (BOLT), SEC CIK 1641281, 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 2026-11-02.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-23.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 2026-08-13.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 2026-08-11.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 2026-10-23.JSON and CSV
- Company record
- EDGAR filing index for CIK 1641281Ticker, 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.
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Datasets
Frequently Asked Questions
How much of BOLT is sold short?
15,751 shares were held short at the 2026-10-15 settlement, 1.0 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 BOLT's daily short volume?
On 2026-11-02, 5,712 of the 12,119 BOLT shares reported to FINRA were sold short, 47.1% of the day's reported volume. Short volume is a flow for one day, not a position.
Does BOLT have fails to deliver?
The SEC's latest file shows 9 BOLT shares failed to deliver at settlement 2026-09-23. Fails are reported per settlement date and published twice a month with a lag.
Are BOLT insiders buying or selling?
Insiders at BOLT reported 9 open-market sells worth $128K in the last 90 days and no open-market buys. Latest filing: GUJRATHI SHEILA (Chief Strategy Officer) on 2026-10-23.
Who owns 5% or more of BOLT?
2 holders report 5% or more of BOLT in their latest filing, all on Schedule 13G (passive). The largest reported stake is Renaissance Technologies Holdings Corporation at 5.1% of the class (98,625 shares), filed 2026-08-13 for an event on 2026-06-24.
Which tracked 13F managers own BOLT?
2 of the 30 tracked 13F managers held BOLT shares at their latest filing, $599K in all. The largest: Renaissance Technologies (99K shares, $380K), Ken Griffin's Citadel Advisors (57K shares, $219K).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.