Eledon Pharmaceuticals (ELDN)
Eledon Pharmaceuticals on one page: short interest, daily short volume, fails to deliver, large holders, 13F holders, earnings dates and insider trades. Listed on Nasdaq.
7.9M
Short interest
settlement 2026-10-15
10.3
Days to cover
+1.4 days vs prior
62.7%
Short share of volume
2026-11-02
2,097
Fails to deliver
settlement 2026-10-14
Fri 6 Nov
Next earnings
estimated date
$0
Insider flow, 90 days
0 buys, 0 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 ELDN is 7,896,950 shares, down 362,318 shares over the last month. Over the last 48 readings it ranged from 686,688 shares (29 November 2024) to 8,417,915 shares (13 March 2026). The latest reading sits at the top of that range. At the reported average volume of 770K shares a day that is 10.3 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 7,896,950 | +0.6% | 770,159 | 10.25 |
| 2026-09-30 | 7,847,702 | -5.0% | 888,937 | 8.83 |
| 2026-09-15 | 8,259,268 | +6.6% | 919,103 | 8.99 |
| 2026-08-31 | 7,746,695 | +23.2% | 958,381 | 8.08 |
| 2026-08-14 | 6,289,078 | +1.2% | 915,083 | 6.87 |
| 2026-07-31 | 6,213,318 | +12.5% | 957,400 | 6.49 |
| 2026-07-15 | 5,522,678 | -29.5% | 1,426,048 | 3.87 |
| 2026-06-30 | 7,832,853 | +4.4% | 2,432,170 | 3.22 |
| 2026-06-15 | 7,501,607 | +3.0% | 1,005,477 | 7.46 |
| 2026-05-29 | 7,283,375 | +7.4% | 920,216 | 7.91 |
| 2026-05-15 | 6,781,022 | -10.2% | 1,265,745 | 5.36 |
| 2026-04-30 | 7,553,023 | -3.3% | 2,085,290 | 3.62 |
| 2026-04-15 | 7,812,771 | +8.6% | 1,257,972 | 6.21 |
| 2026-03-31 | 7,193,953 | -14.5% | 1,709,577 | 4.21 |
| 2026-03-13 | 8,417,915 | +30.3% | 1,292,590 | 6.51 |
| 2026-02-27 | 6,458,931 | +1.1% | 840,495 | 7.68 |
| 2026-02-13 | 6,389,298 | -0.1% | 484,688 | 13.18 |
| 2026-01-30 | 6,392,263 | +1.1% | 610,359 | 10.47 |
| 2026-01-15 | 6,323,235 | +4.7% | 865,188 | 7.31 |
| 2025-12-31 | 6,040,051 | +6.8% | 901,803 | 6.70 |
| 2025-12-15 | 5,656,993 | +20.7% | 984,674 | 5.75 |
| 2025-11-28 | 4,685,209 | -6.3% | 2,819,524 | 1.66 |
| 2025-11-14 | 5,001,990 | +16.8% | 5,400,151 | 1.00 |
| 2025-10-31 | 4,281,446 | +21.8% | 2,121,427 | 2.02 |
| 2025-10-15 | 3,515,385 | -47.5% | 1,015,113 | 3.46 |
| 2025-09-30 | 6,691,429 | +23.2% | 1,192,705 | 5.61 |
| 2025-09-15 | 5,429,434 | +25.0% | 656,290 | 8.27 |
| 2025-08-29 | 4,342,922 | -20.5% | 648,145 | 6.70 |
| 2025-08-15 | 5,461,601 | +24.9% | 1,168,550 | 4.67 |
| 2025-07-31 | 4,373,776 | +40.9% | 717,691 | 6.09 |
| 2025-07-15 | 3,105,017 | -4.8% | 574,817 | 5.40 |
| 2025-06-30 | 3,260,307 | +145.3% | 1,030,022 | 3.17 |
| 2025-06-13 | 1,329,307 | -8.8% | 176,454 | 7.53 |
| 2025-05-30 | 1,457,975 | -6.9% | 202,880 | 7.19 |
| 2025-05-15 | 1,566,758 | -12.3% | 197,735 | 7.92 |
| 2025-04-30 | 1,785,612 | +1.8% | 146,363 | 12.20 |
| 2025-04-15 | 1,753,561 | +20.1% | 232,273 | 7.55 |
| 2025-03-31 | 1,460,007 | +6.3% | 274,520 | 5.32 |
| 2025-03-14 | 1,373,271 | +2.2% | 240,866 | 5.70 |
| 2025-02-28 | 1,344,194 | +14.2% | 164,614 | 8.17 |
| 2025-02-14 | 1,176,911 | -3.2% | 201,107 | 5.85 |
| 2025-01-31 | 1,215,386 | +21.4% | 249,502 | 4.87 |
| 2025-01-15 | 1,001,086 | -19.7% | 430,747 | 2.32 |
| 2024-12-31 | 1,247,068 | +38.9% | 673,513 | 1.85 |
| 2024-12-13 | 898,104 | +30.8% | 531,882 | 1.69 |
| 2024-11-29 | 686,688 | -6.1% | 250,294 | 2.74 |
| 2024-11-15 | 731,494 | -23.9% | 421,335 | 1.74 |
| 2024-10-31 | 960,552 | +572.4% | 1,223,558 | 1.00 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 2 November 2026, the short share of ELDN volume is 62.7%, down 10.7 points over the last five sessions. Over the last 30 readings it ranged from 43.0% (24 September 2026) to 82.4% (13 October 2026). The latest reading is in line with the 30-session average of 64.5%, on 283K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-02 | 178K | 283K | 62.7% | 3,727 |
| 2026-10-30 | 221K | 498K | 44.3% | 901 |
| 2026-10-29 | 790K | 1.1M | 69.5% | 41,064 |
| 2026-10-28 | 527K | 724K | 72.9% | 0 |
| 2026-10-27 | 264K | 351K | 75.2% | 2,454 |
| 2026-10-26 | 188K | 256K | 73.4% | 0 |
| 2026-10-23 | 102K | 156K | 65.6% | 400 |
| 2026-10-22 | 161K | 238K | 67.7% | 0 |
| 2026-10-21 | 162K | 257K | 63.1% | 0 |
| 2026-10-20 | 163K | 312K | 52.3% | 0 |
| 2026-10-19 | 301K | 408K | 73.9% | 0 |
| 2026-10-16 | 205K | 405K | 50.6% | 0 |
| 2026-10-15 | 173K | 250K | 69.0% | 4,069 |
| 2026-10-14 | 315K | 473K | 66.7% | 11,064 |
| 2026-10-13 | 386K | 468K | 82.4% | 15,227 |
| 2026-10-12 | 99K | 129K | 76.4% | 2,190 |
| 2026-10-09 | 192K | 335K | 57.2% | 0 |
| 2026-10-08 | 160K | 229K | 69.9% | 1,000 |
| 2026-10-07 | 186K | 262K | 71.2% | 0 |
| 2026-10-06 | 302K | 377K | 80.1% | 0 |
| 2026-10-05 | 202K | 317K | 63.7% | 10 |
| 2026-10-02 | 255K | 347K | 73.5% | 0 |
| 2026-10-01 | 136K | 263K | 51.5% | 0 |
| 2026-09-30 | 184K | 319K | 57.8% | 5,262 |
| 2026-09-29 | 178K | 285K | 62.6% | 1,100 |
| 2026-09-28 | 176K | 252K | 70.0% | 0 |
| 2026-09-25 | 132K | 239K | 55.5% | 0 |
| 2026-09-24 | 188K | 437K | 43.0% | 0 |
| 2026-09-23 | 363K | 633K | 57.4% | 0 |
| 2026-09-22 | 602K | 1.0M | 57.4% | 15,578 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 14 October 2026, the fails-to-deliver balance in ELDN is 2,097 shares, down 6,476 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (31 August 2026) to 200,100 shares (7 July 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-10-14 | 2,097 | $2.34 | $5K |
| 2026-10-13 | 8,573 | $2.44 | $21K |
| 2026-10-05 | 6,396 | $2.49 | $16K |
| 2026-10-02 | 8,521 | $2.44 | $21K |
| 2026-09-23 | 200 | $2.89 | $578 |
| 2026-09-22 | 200 | $2.69 | $538 |
| 2026-09-21 | 3,595 | $2.62 | $9K |
| 2026-09-18 | 1,966 | $2.65 | $5K |
| 2026-09-10 | 1,907 | $2.82 | $5K |
| 2026-09-03 | 1,800 | $2.99 | $5K |
| 2026-08-31 | 1 | $3.20 | $3 |
| 2026-08-28 | 63,324 | $3.32 | $210K |
| 2026-08-26 | 66,263 | $3.47 | $230K |
| 2026-08-25 | 10,000 | $3.41 | $34K |
| 2026-08-20 | 2,773 | $3.55 | $10K |
| 2026-08-13 | 18,975 | $3.77 | $72K |
| 2026-08-03 | 414 | $3.38 | $1K |
| 2026-07-31 | 3,260 | $3.41 | $11K |
| 2026-07-20 | 768 | $4.07 | $3K |
| 2026-07-16 | 300 | $4.02 | $1K |
| 2026-07-10 | 60,397 | $4.13 | $249K |
| 2026-07-09 | 992 | $4.21 | $4K |
| 2026-07-08 | 992 | $3.93 | $4K |
| 2026-07-07 | 200,100 | $3.97 | $794K |
| 2026-07-01 | 83,542 | $3.94 | $329K |
| 2026-06-30 | 91,305 | $3.88 | $354K |
| 2026-06-29 | 95,938 | $3.78 | $363K |
| 2026-06-25 | 504 | $3.96 | $2K |
| 2026-06-22 | 1,886 | $3.92 | $7K |
| 2026-06-18 | 143,663 | $3.70 | $532K |
Insider trades
SEC Form 4, newest first. JSONNo open-market insider trades were reported for ELDN in the last 90 days. The most recent filings are listed below. Latest filing: Gros David-Alexandre C (Chief Executive Officer) on 2026-07-31.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-07-31 | Gros David-Alexandre C | Chief Executive Officer | Tax withholding | 195K | $3.38 | $658K | 169K |
| 2026-07-31 | Gros David-Alexandre C | Chief Executive Officer | Grant | 354K | $0.00 | $0 | 363K |
| 2026-07-31 | Perrin Steven | President | Tax withholding | 72K | $3.38 | $244K | 81K |
| 2026-07-31 | Perrin Steven | President | Grant | 152K | $0.00 | $0 | 153K |
| 2026-01-10 | McBride John S. | Director | Exercise or conversion | 3K | $0.00 | $0 | 3K |
| 2026-01-10 | Hillson Jan | Director | Exercise or conversion | 3K | $0.00 | $0 | 3K |
| 2026-01-10 | Kirk Allan | Director | Exercise or conversion | 3K | $0.00 | $0 | 3K |
| 2026-01-10 | Katkin Keith | Director | Exercise or conversion | 9K | $0.00 | $0 | 9K |
| 2026-01-10 | Lee June | Director | Exercise or conversion | 3K | $0.00 | $0 | 3K |
| 2026-01-10 | Robinson James A. Jr. | Director | Exercise or conversion | 3K | $0.00 | $0 | 3K |
| 2024-05-09 | BVF INC/IL | TenPercentOwner | Buy | 75K | price not stated in the filing | not stated | 220K |
| 2024-05-09 | BVF INC/IL | TenPercentOwner | Buy | 821K | price not stated in the filing | not stated | 2.6M |
| 2024-05-09 | BVF INC/IL | TenPercentOwner | Buy | 1.0M | price not stated in the filing | not stated | 3.4M |
| 2023-05-05 | Biotechnology Value Trading Fund OS LP | Other | Buy | 1.1M | price not stated in the filing | not stated | 2.3M |
| 2023-05-05 | Biotechnology Value Trading Fund OS LP | Other | Buy | 86K | price not stated in the filing | not stated | 145K |
| 2023-05-05 | Biotechnology Value Trading Fund OS LP | Other | Buy | 837K | price not stated in the filing | not stated | 1.8M |
| 2022-11-23 | Perrin Steven | President | Buy | 1K | $2.60 | $3K | 1K |
| 2021-12-20 | Gros David-Alexandre C | Chief Executive Officer | Buy | 2K | $4.48 | $9K | 9K |
| 2021-08-17 | Gros David-Alexandre C | Chief Executive Officer | Buy | 4K | $6.21 | $25K | 7K |
| 2021-06-11 | Little Paul Sean | CHIEF FINANCIAL OFFICER | Buy | 10K | $8.87 | $89K | 10K |
| 2021-06-09 | Gros David-Alexandre C | Chief Executive Officer | Buy | 3K | $8.01 | $24K | 3K |
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. JSON7 holders report 5% or more of ELDN in their latest filing, all on Schedule 13G (passive). The largest reported stake is LAMPERT MARK N at 10.0% of the class (7,868,419 shares), filed 2026-05-15 for an event on 2026-03-31.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-10-30 | 13G/Ano. 1 | Vanguard Capital Managementinvestment adviser | 4.0M | 4.9% | 2026-09-30 |
| 2026-05-15 | 13G/Ano. 11 | LAMPERT MARK Nindividual | 7.9M | 10.0% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 11 | BVF INC/ILcorporation | 7.9M | 10.0% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 11 | BVF PARTNERS L P/ILinvestment adviser, partnership | 7.9M | 10.0% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 11 | BVF GP HOLDINGS LLCother entity | 7.4M | 9.4% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 11 | BVF I GP LLCother entity | 5.4M | 6.8% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 11 | BIOTECHNOLOGY VALUE FUND L Ppartnership | 5.4M | 6.8% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 11 | BVF II GP LLCother entity | 2.1M | 2.7% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 11 | BIOTECHNOLOGY VALUE FUND II LPpartnership | 2.1M | 2.7% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 11 | Biotechnology Value Trading Fund OS LPpartnership | 302K | 0.4% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 11 | BVF Partners OS Ltd.corporation | 302K | 0.4% | 2026-03-31 |
| 2026-04-27 | 13G | BlackRock, Inc.parent holding company | 4.4M | 5.8% | 2026-03-31 |
| 2026-03-26 | 13G/Ano. 1 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
| 2026-02-17 | 13G/Ano. 1 | RA Capital Management, L.P.investment adviser, partnership | 0 | 0.0% | 2025-12-31 |
| 2026-02-17 | 13G/Ano. 1 | Peter Kolchinskyparent holding company, individual | 0 | 0.0% | 2025-12-31 |
| 2026-02-17 | 13G/Ano. 1 | Rajeev Shahparent holding company, individual | 0 | 0.0% | 2025-12-31 |
| 2026-02-17 | 13G/Ano. 1 | RA Capital Healthcare Fund, L.P.partnership | 0 | 0.0% | 2025-12-31 |
| 2026-02-13 | 13G/Ano. 1 | Coastlands Capital LPinvestment adviser, partnership | 3.9M | 5.0% | 2025-12-31 |
| 2026-02-13 | 13G/Ano. 1 | Coastlands Capital Partners LPpartnership | 3.9M | 5.0% | 2025-12-31 |
| 2026-02-13 | 13G/Ano. 1 | Coastlands Capital GP LLCother entity | 3.9M | 5.0% | 2025-12-31 |
| 2026-02-13 | 13G/Ano. 1 | Coastlands Capital LLCparent holding company, other entity | 3.9M | 5.0% | 2025-12-31 |
| 2026-02-13 | 13G/Ano. 1 | Matthew D. Perryparent holding company, individual | 3.9M | 5.0% | 2025-12-31 |
13F holders
Tracked managers holding ELDN at their latest 13F. JSON5 of the 30 tracked managers held ELDN at their latest 13F, $7.9M in total at quarter-end prices. Millennium Management is the largest at $3.9M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 5 added shares and 0 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Millennium Management | 2026-06-30 | 980K | $3.9M | 0.00% | new |
| AQR Capital Management | 2026-06-30 | 581K | $2.3M | 0.00% | +409K |
| Citadel Advisors | 2026-06-30 | 216K | $851K | 0.00% | new |
| Renaissance Technologies | 2026-06-30 | 201K | $792K | 0.00% | +176K |
| Two Sigma Investments | 2026-06-30 | 33K | $130K | 0.00% | new |
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
Eledon Pharmaceuticals 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 Eledon Pharmaceuticals (ELDN), SEC CIK 1404281, listed on Nasdaq. 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 2026-10-14.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 2026-10-30.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 2026-08-13.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 2026-07-31.JSON and CSV
- Company record
- EDGAR filing index for CIK 1404281Ticker, 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 ELDN is sold short?
What is ELDN's daily short volume?
Does ELDN have fails to deliver?
Are ELDN insiders buying or selling?
Who owns 5% or more of ELDN?
Which tracked 13F managers own ELDN?
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.