Shoulder Innovations (SI)
Shoulder Innovations on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, earnings dates and insider trades. Listed on NYSE, classified by the SEC as surgical & medical instruments & apparatus.
710K
Short interest
settlement 2026-10-15
6.3
Days to cover
+2.5 days vs prior
62.3%
Short share of volume
2026-11-03
4,324
Fails to deliver
settlement 2026-10-09
Wed 11 Nov
Next earnings
estimated date
-$1.3M
Insider flow, 90 days
0 buys, 9 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 SI is 710,108 shares, up 290,349 shares over the last month. Over the last 48 readings it ranged from 182,853 shares (31 October 2025) to 21,152,967 shares (28 February 2023). The latest reading sits at the bottom of that range. At the reported average volume of 112K shares a day that is 6.3 days to cover.
Embed this chart.The embed keeps its attribution line.
<iframe src="https://xoomar.com/embed/stocks/si" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 710,108 | +12.7% | 111,801 | 6.35 |
| 2026-09-30 | 630,244 | +50.1% | 163,233 | 3.86 |
| 2026-09-15 | 419,759 | +39.2% | 89,417 | 4.69 |
| 2026-08-31 | 301,537 | +14.4% | 103,809 | 2.90 |
| 2026-08-14 | 263,477 | +21.8% | 137,006 | 1.92 |
| 2026-07-31 | 216,299 | +3.8% | 90,273 | 2.40 |
| 2026-07-15 | 208,425 | +6.7% | 113,744 | 1.83 |
| 2026-06-30 | 195,425 | -24.8% | 201,878 | 1.00 |
| 2026-06-15 | 259,817 | -10.4% | 96,110 | 2.70 |
| 2026-05-29 | 289,887 | -15.4% | 83,221 | 3.48 |
| 2026-05-15 | 342,733 | -21.1% | 94,427 | 3.63 |
| 2026-04-30 | 434,559 | -8.7% | 62,737 | 6.93 |
| 2026-04-15 | 475,948 | +21.6% | 86,284 | 5.52 |
| 2026-03-31 | 391,514 | +27.1% | 148,383 | 2.64 |
| 2026-03-13 | 307,956 | +11.1% | 92,628 | 3.32 |
| 2026-02-27 | 277,098 | +5.2% | 40,716 | 6.81 |
| 2026-02-13 | 263,481 | -13.0% | 87,453 | 3.01 |
| 2026-01-30 | 302,696 | +5.6% | 42,752 | 7.08 |
| 2026-01-15 | 286,619 | -2.3% | 38,756 | 7.40 |
| 2025-12-31 | 293,489 | -10.7% | 63,540 | 4.62 |
| 2025-12-15 | 328,472 | +4.5% | 43,083 | 7.62 |
| 2025-11-28 | 314,442 | +31.5% | 60,684 | 5.18 |
| 2025-11-14 | 239,160 | +30.8% | 100,984 | 2.37 |
| 2025-10-31 | 182,853 | -3.2% | 48,022 | 3.81 |
| 2025-10-15 | 188,958 | -73.6% | 64,315 | 2.94 |
| 2025-09-30 | 715,195 | +28.8% | 181,681 | 3.94 |
| 2025-09-15 | 555,472 | +3.0% | 140,883 | 3.94 |
| 2025-08-29 | 539,256 | +13.4% | 160,316 | 3.36 |
| 2025-08-15 | 475,577 | +100.0% | 216,713 | 2.19 |
| 2023-04-28 | 12,395,571 | -12.3% | 2,518,322 | 4.92 |
| 2023-04-14 | 14,135,939 | -3.7% | 5,320,932 | 2.66 |
| 2023-03-31 | 14,683,186 | -26.2% | 33,221,930 | 1.00 |
| 2023-03-15 | 19,892,484 | -6.0% | 31,847,933 | 1.00 |
| 2023-02-28 | 21,152,967 | +7.9% | 9,964,736 | 2.12 |
| 2023-02-15 | 19,610,421 | -3.0% | 16,044,784 | 1.22 |
| 2023-01-31 | 20,218,636 | +3.0% | 9,844,093 | 2.05 |
| 2023-01-13 | 19,625,249 | +15.6% | 12,125,350 | 1.62 |
| 2022-12-30 | 16,970,441 | +12.3% | 3,676,984 | 4.62 |
| 2022-12-15 | 15,112,815 | +36.0% | 5,133,526 | 2.94 |
| 2022-11-30 | 11,113,851 | +96.9% | 6,904,871 | 1.61 |
| 2022-11-15 | 5,643,210 | +76.7% | 4,471,147 | 1.26 |
| 2022-10-31 | 3,193,760 | +1.7% | 1,477,298 | 2.16 |
| 2022-10-14 | 3,139,763 | -3.0% | 712,304 | 4.41 |
| 2022-09-30 | 3,238,407 | +0.8% | 604,960 | 5.35 |
| 2022-09-15 | 3,214,437 | +6.0% | 608,716 | 5.28 |
| 2022-08-31 | 3,033,884 | -7.8% | 525,893 | 5.77 |
| 2022-08-15 | 3,291,012 | -8.9% | 773,376 | 4.26 |
| 2022-07-29 | 3,612,995 | -17.2% | 1,664,678 | 2.17 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 3 November 2026, the short share of SI volume is 62.3%, down 0.9 points over the last five sessions. Over the last 30 readings it ranged from 38.5% (14 October 2026) to 88.6% (29 September 2026). The latest reading is 7.8 points below the 30-session average of 70.1%, on 58K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-03 | 36K | 58K | 62.3% | 0 |
| 2026-11-02 | 21K | 28K | 76.6% | 0 |
| 2026-10-30 | 19K | 32K | 60.3% | 0 |
| 2026-10-29 | 27K | 34K | 80.8% | 0 |
| 2026-10-28 | 11K | 14K | 79.8% | 0 |
| 2026-10-27 | 27K | 42K | 63.2% | 0 |
| 2026-10-26 | 15K | 25K | 60.4% | 0 |
| 2026-10-23 | 13K | 30K | 45.1% | 0 |
| 2026-10-22 | 11K | 15K | 72.8% | 0 |
| 2026-10-21 | 35K | 67K | 52.3% | 0 |
| 2026-10-20 | 18K | 24K | 72.6% | 0 |
| 2026-10-19 | 21K | 33K | 64.2% | 0 |
| 2026-10-16 | 13K | 18K | 72.1% | 0 |
| 2026-10-15 | 23K | 32K | 71.0% | 0 |
| 2026-10-14 | 18K | 47K | 38.5% | 0 |
| 2026-10-13 | 12K | 22K | 55.5% | 0 |
| 2026-10-12 | 17K | 26K | 67.6% | 0 |
| 2026-10-09 | 15K | 21K | 72.9% | 0 |
| 2026-10-08 | 26K | 33K | 79.1% | 1 |
| 2026-10-07 | 23K | 29K | 78.2% | 0 |
| 2026-10-06 | 33K | 42K | 79.4% | 0 |
| 2026-10-05 | 31K | 42K | 73.8% | 0 |
| 2026-10-02 | 30K | 37K | 81.1% | 0 |
| 2026-10-01 | 51K | 68K | 74.8% | 0 |
| 2026-09-30 | 62K | 75K | 82.9% | 0 |
| 2026-09-29 | 61K | 69K | 88.6% | 0 |
| 2026-09-28 | 38K | 52K | 73.3% | 0 |
| 2026-09-25 | 20K | 25K | 81.9% | 0 |
| 2026-09-24 | 16K | 21K | 77.6% | 0 |
| 2026-09-23 | 21K | 32K | 65.2% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 9 October 2026, the fails-to-deliver balance in SI is 4,324 shares, up 3,736 shares over the last settlement date. Over the last 30 readings it ranged from 8 shares (13 May 2026) to 78,817 shares (5 August 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-10-09 | 4,324 | $17.89 | $77K |
| 2026-10-08 | 588 | $18.71 | $11K |
| 2026-09-29 | 4,339 | $17.95 | $78K |
| 2026-09-22 | 137 | $17.52 | $2K |
| 2026-09-16 | 499 | $17.95 | $9K |
| 2026-08-13 | 4,567 | $19.34 | $88K |
| 2026-08-10 | 300 | $20.59 | $6K |
| 2026-08-06 | 76,718 | $22.60 | $1.7M |
| 2026-08-05 | 78,817 | $22.69 | $1.8M |
| 2026-07-31 | 1,152 | $23.19 | $27K |
| 2026-07-30 | 1,000 | $23.72 | $24K |
| 2026-07-27 | 15 | $20.41 | $306 |
| 2026-07-17 | 32 | $22.53 | $721 |
| 2026-07-01 | 97 | $20.28 | $2K |
| 2026-06-30 | 77 | $21.09 | $2K |
| 2026-06-18 | 15 | $17.97 | $270 |
| 2026-05-22 | 13 | $15.10 | $196 |
| 2026-05-21 | 52 | $14.88 | $774 |
| 2026-05-20 | 40 | $14.93 | $597 |
| 2026-05-18 | 510 | $15.63 | $8K |
| 2026-05-13 | 8 | $13.37 | $107 |
| 2026-05-11 | 12 | $13.20 | $158 |
| 2026-05-06 | 132 | $12.92 | $2K |
| 2026-04-30 | 2,604 | $12.28 | $32K |
| 2026-04-24 | 102 | $13.07 | $1K |
| 2026-04-21 | 1,064 | $14.90 | $16K |
| 2026-03-26 | 10,834 | $14.40 | $156K |
| 2026-03-25 | 18,101 | $14.60 | $264K |
| 2026-03-24 | 19,828 | $14.41 | $286K |
| 2026-03-23 | 21,467 | $14.30 | $307K |
Insider trades
SEC Form 4, newest first. JSONInsiders at SI reported 9 open-market sells worth $1.3M in the last 90 days and no open-market buys. Latest filing: Ball Robert Joseph (CEO & Executive Chairman) on 2026-10-30.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-10-30 | Ball Robert Joseph | CEO & Executive Chairman | Tax withholding | 30K | $20.44 | $606K | 418K |
| 2026-10-30 | Ball Robert Joseph | CEO & Executive Chairman | Exercise or conversion | 67K | $2.48 | $166K | 448K |
| 2026-10-05 | Hykes Andrew | Director | Grant | 669 | $19.60 | $13K | 7K |
| 2026-10-05 | BUCKMAN PAUL | Director | Grant | 1K | $19.60 | $25K | 65K |
| 2026-10-05 | Tansey Casey M | Director, 10% owner | Grant | 733 | $19.60 | $14K | 53K |
| 2026-10-05 | Sidow Kevin K. | Director | Grant | 892 | $19.60 | $17K | 26K |
| 2026-09-14 | Ball Robert Joseph | CEO & Executive Chairman | Sell | 10K | $18.45 | $188K | 381K |
| 2026-09-14 | Ball Robert Joseph | CEO & Executive Chairman | Exercise or conversion | 89K | $2.10 | $187K | 391K |
| 2026-08-26 | Gilde Healthcare Holding B.V. | 10% owner | Sell | 1K | $22.60 | $27K | 2.2M |
| 2026-08-24 | Gilde Healthcare Holding B.V. | 10% owner | Sell | 681 | $22.62 | $15K | 2.2M |
| 2026-08-21 | Gilde Healthcare Holding B.V. | 10% owner | Sell | 21K | $22.61 | $464K | 2.2M |
| 2026-08-20 | Gilde Healthcare Holding B.V. | 10% owner | Sell | 4K | $22.60 | $88K | 2.2M |
| 2026-08-18 | Ahearn Matthew Fraser | Chief Operating Officer | Sell | 2K | $21.38 | $34K | 244K |
| 2026-08-18 | Ahearn Matthew Fraser | Chief Operating Officer | Sell | 13K | $20.94 | $263K | 246K |
| 2026-08-17 | Ahearn Matthew Fraser | Chief Operating Officer | Sell | 8K | $20.10 | $167K | 258K |
| 2026-08-14 | Ahearn Matthew Fraser | Chief Operating Officer | Gift | 3K | $0.00 | $0 | 267K |
| 2026-08-06 | Gilde Healthcare Holding B.V. | 10% owner | Sell | 2K | $22.60 | $47K | 2.2M |
| 2026-08-05 | Gilde Healthcare Holding B.V. | 10% owner | Sell | 7K | $22.64 | $166K | 2.2M |
| 2026-08-04 | Gilde Healthcare Holding B.V. | 10% owner | Sell | 100K | $22.77 | $2.3M | 2.2M |
| 2026-08-03 | Gilde Healthcare Holding B.V. | 10% owner | Sell | 11K | $22.71 | $244K | 2.3M |
| 2026-07-31 | Gilde Healthcare Holding B.V. | 10% owner | Sell | 20K | $22.73 | $455K | 2.3M |
| 2026-07-30 | Gilde Healthcare Holding B.V. | 10% owner | Sell | 28K | $23.36 | $660K | 2.4M |
| 2026-06-26 | Hykes Andrew | Director | Grant | 5K | $0.00 | $0 | 7K |
| 2026-06-26 | Sidow Kevin K. | Director | Grant | 5K | $0.00 | $0 | 25K |
| 2026-06-26 | Tansey Casey M | Director,TenPercentOwner | Grant | 5K | $0.00 | $0 | 53K |
| 2026-06-26 | Buchholz Richard | Director | Grant | 5K | $0.00 | $0 | 19K |
| 2026-06-26 | BUCKMAN PAUL | Director | Grant | 5K | $0.00 | $0 | 64K |
| 2026-06-15 | Ahearn Matthew Fraser | Chief Operating Officer | Sell | 3K | $19.26 | $48K | 269K |
| 2026-06-15 | Ahearn Matthew Fraser | Chief Operating Officer | Sell | 2K | $18.20 | $30K | 272K |
| 2026-06-12 | Ahearn Matthew Fraser | Chief Operating Officer | Sell | 16K | $18.68 | $296K | 273K |
| 2026-04-30 | Ball Robert Joseph | CEO & Executive Chairman | Exercise or conversion | 10K | $2.48 | $25K | 300K |
| 2026-04-20 | Ahearn Matthew Fraser | Chief Operating Officer | Exercise or conversion | 14K | $2.86 | $41K | 287K |
| 2026-04-20 | Ahearn Matthew Fraser | Chief Operating Officer | Exercise or conversion | 7K | $2.48 | $18K | 273K |
| 2026-03-13 | Points Jeffrey S. | Chief Financial Officer | Buy | 2K | $15.00 | $30K | 71K |
| 2026-03-13 | Points Jeffrey S. | Chief Financial Officer | Exercise or conversion | 13K | $2.48 | $33K | 69K |
| 2026-03-13 | Buchholz Richard | Director | Buy | 1K | $14.84 | $15K | 14K |
| 2026-03-13 | Ball Robert Joseph | CEO & Executive Chairman | Buy | 2K | $15.18 | $33K | 279K |
| 2026-03-13 | BUCKMAN PAUL | Director | Tax withholding | 4K | $14.82 | $55K | 59K |
| 2026-03-13 | BUCKMAN PAUL | Director | Tax withholding | 3K | $14.62 | $48K | 62K |
| 2026-03-13 | BUCKMAN PAUL | Director | Exercise or conversion | 26K | $2.10 | $55K | 66K |
| 2026-03-13 | BUCKMAN PAUL | Director | Exercise or conversion | 19K | $2.48 | $48K | 40K |
| 2026-02-06 | Ball Robert Joseph | CEO & Executive Chairman | Exercise or conversion | 2K | $2.10 | $4K | 277K |
| 2026-02-06 | Ball Robert Joseph | CEO & Executive Chairman | Exercise or conversion | 10K | $2.48 | $25K | 275K |
| 2025-12-31 | Points Jeffrey S. | Chief Financial Officer | Grant | 1K | $12.16 | $13K | 56K |
| 2025-12-31 | Blue David Lawrence | See Remarks | Grant | 1K | $12.16 | $13K | 139K |
| 2025-12-31 | Ball Robert Joseph | CEO & Executive Chairman | Grant | 2K | $12.16 | $20K | 120K |
| 2025-12-31 | Ahearn Matthew Fraser | Chief Operating Officer | Grant | 477 | $12.16 | $6K | 216K |
| 2025-12-12 | Points Jeffrey S. | Chief Financial Officer | Buy | 1K | $14.98 | $15K | 54K |
| 2025-12-12 | Ball Robert Joseph | CEO & Executive Chairman | Buy | 4K | $14.89 | $58K | 118K |
| 2025-12-11 | Points Jeffrey S. | Chief Financial Officer | Buy | 995 | $14.65 | $15K | 53K |
| 2025-12-11 | Ball Robert Joseph | CEO & Executive Chairman | Buy | 3K | $14.83 | $49K | 115K |
| 2025-09-12 | Points Jeffrey S. | CHIEF FINANCIAL OFFICER | Buy | 2K | $15.67 | $25K | 52K |
| 2025-09-12 | Blue David Lawrence | SEE REMARKS | Exercise or conversion | 16K | $2.48 | $39K | 138K |
| 2025-09-12 | Blue David Lawrence | SEE REMARKS | Exercise or conversion | 79K | $2.10 | $165K | 123K |
| 2025-09-12 | Ball Robert Joseph | CEO & EXECUTIVE CHAIRMAN | Buy | 6K | $15.49 | $93K | 111K |
| 2025-09-11 | Points Jeffrey S. | CHIEF FINANCIAL OFFICER | Exercise or conversion | 13K | $2.48 | $33K | 51K |
| 2025-09-11 | Ball Robert Joseph | CEO & EXECUTIVE CHAIRMAN | Buy | 2K | $14.90 | $30K | 105K |
| 2025-09-11 | Ahearn Matthew Fraser | CHIEF OPERATING OFFICER | Exercise or conversion | 16K | $2.48 | $41K | 215K |
| 2025-09-11 | Ahearn Matthew Fraser | CHIEF OPERATING OFFICER | Exercise or conversion | 79K | $2.10 | $165K | 199K |
| 2025-09-11 | Ahearn Matthew Fraser | CHIEF OPERATING OFFICER | Exercise or conversion | 12K | $0.93 | $11K | 120K |
| 2025-08-01 | Ball Robert Joseph | CEO & EXECUTIVE CHAIRMAN | Conversion | 86K | price not stated in the filing | not stated | 103K |
| 2025-08-01 | Carusi Michael A | Director | Conversion | 1.6M | price not stated in the filing | not stated | 1.6M |
| 2025-08-01 | Carusi Michael A | Director | Buy | 267K | $15.00 | $4.0M | 1.9M |
| 2025-08-01 | Carusi Michael A | Director | Grant | 8K | $0.00 | $0 | 8K |
| 2025-08-01 | BUCKMAN PAUL | Director | Conversion | 6K | price not stated in the filing | not stated | 6K |
| 2025-08-01 | BUCKMAN PAUL | Director | Grant | 8K | $0.00 | $0 | 14K |
| 2025-08-01 | Pardo Geoffrey B | Director,TenPercentOwner | Conversion | 2.3M | price not stated in the filing | not stated | 2.3M |
| 2025-08-01 | Pardo Geoffrey B | Director,TenPercentOwner | Buy | 100K | $15.00 | $1.5M | 2.4M |
| 2025-08-01 | Pardo Geoffrey B | Director,TenPercentOwner | Grant | 8K | $0.00 | $0 | 8K |
| 2025-08-01 | Blue David Lawrence | SEE REMARKS | Conversion | 44K | price not stated in the filing | not stated | 44K |
| 2025-08-01 | Tansey Casey M | Director,TenPercentOwner | Conversion | 1.7M | price not stated in the filing | not stated | 1.7M |
| 2025-08-01 | Tansey Casey M | Director,TenPercentOwner | Conversion | 86K | price not stated in the filing | not stated | 86K |
| 2025-08-01 | Ahearn Matthew Fraser | CHIEF OPERATING OFFICER | Conversion | 67K | price not stated in the filing | not stated | 108K |
| 2025-08-01 | Sidow Kevin K. | Director | Grant | 8K | $0.00 | $0 | 20K |
| 2025-08-01 | Sidow Kevin K. | Director | Conversion | 12K | price not stated in the filing | not stated | 12K |
| 2025-08-01 | Lightstone Ventures II (A), L.P. | Other | Buy | 267K | $15.00 | $4.0M | 1.9M |
| 2025-08-01 | Lightstone Ventures II (A), L.P. | Other | Conversion | 1.6M | price not stated in the filing | not stated | 1.6M |
| 2025-08-01 | Tansey Casey M | Director,TenPercentOwner | Buy | 40K | $15.00 | $600K | 48K |
| 2025-08-01 | Tansey Casey M | Director,TenPercentOwner | Grant | 8K | $0.00 | $0 | 8K |
| 2025-08-01 | Tansey Casey M | Director,TenPercentOwner | Conversion | 921K | price not stated in the filing | not stated | 921K |
| 2025-08-01 | Gilde Healthcare Holding B.V. | TenPercentOwner | Conversion | 537K | price not stated in the filing | not stated | 2.3M |
| 2025-08-01 | Gilde Healthcare Holding B.V. | TenPercentOwner | Conversion | 1.7M | price not stated in the filing | not stated | 1.7M |
| 2025-08-01 | Gilde Healthcare Holding B.V. | TenPercentOwner | Buy | 100K | $15.00 | $1.5M | 2.4M |
| 2025-08-01 | Points Jeffrey S. | CHIEF FINANCIAL OFFICER | Buy | 50 | $15.00 | $750 | 50 |
| 2025-08-01 | Buchholz Richard | Director | Buy | 5K | $15.00 | $75K | 13K |
| 2025-08-01 | Buchholz Richard | Director | Grant | 8K | $0.00 | $0 | 8K |
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.
Planned sales (Form 144)
Newest first. JSON4 Form 144 notices on file for SI worth $5.9M at the prices reported; 2 in the last 90 days worth $654K. Latest: ROBERT BALL filed on 2026-09-14 to sell 10,175 shares ($188K) from 2026-09-14.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-09-14 | ROBERT BALLOfficer, Director | 10K | $188K | 0.049% | 2026-09-14 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-17 | MATTHEW AHEARNDirector, Officer | 23K | $466K | 0.108% | 2026-08-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-29 | Gilde Healthcare Holding B.V.; Cooperatieve Gilde Healthcare V U.A.10% Stockholder | 200K | $4.8M | 0.964% | 2026-07-29 | Van Lanschot Kempen N.V. |
| 2026-06-12 | MATTHEW AHEARNDirector, Officer | 20K | $375K | 0.096% | 2026-06-12 | Morgan Stanley Smith Barney LLC Executive Financial Services |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON15 holders report 5% or more of SI in their latest filing, 5 on Schedule 13D (active intent). The largest reported stake is Abigail P. Johnson at 17.7% of the class (3,673,960 shares), filed 2026-08-06 for an event on 2026-06-30.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-08-07 | 13D/Ano. 1 | Gilde Healthcare V Management B.V.other entity | 2.2M | 10.7% | 2026-08-05 |
| 2026-08-07 | 13D/Ano. 1 | Gilde Healthcare Holding B.V.other entity | 2.2M | 10.7% | 2026-08-05 |
| 2026-08-07 | 13D/Ano. 1 | Cooperatieve Gilde Healthcare V U.A.other entity | 2.2M | 10.7% | 2026-08-05 |
| 2026-08-07 | 13D/Ano. 1 | Manapouri B.V.other entity | 2.2M | 10.7% | 2026-08-05 |
| 2026-08-07 | 13D/Ano. 1 | Martemanshurk B.V.other entity | 2.2M | 10.7% | 2026-08-05 |
| 2026-08-06 | 13G/Ano. 1 | Abigail P. Johnsonindividual | 3.7M | 17.7% | 2026-06-30 |
| 2026-08-06 | 13G/Ano. 1 | FMR LLCparent holding company | 3.7M | 17.7% | 2026-06-30 |
| 2026-05-07 | 13G/Ano. 1 | Ball Robert Josephindividual | 768K | 3.6% | 2026-03-31 |
| 2026-05-07 | 13G/Ano. 1 | Ahearn Matthew Fraserindividual | 317K | 1.5% | 2026-03-31 |
| 2026-05-07 | 13G/Ano. 1 | Blue David Lawrenceindividual | 301K | 1.5% | 2026-03-31 |
| 2026-05-07 | 13G/Ano. 1 | Churchill R. Seanindividual | 155K | 0.8% | 2026-03-31 |
| 2026-05-07 | 13G/Ano. 1 | cultivate(MD) Holdings, LLCother entity | 16K | 0.1% | 2026-03-31 |
| 2025-11-14 | 13G | LSV Associates II, LLCother entity | 1.9M | 9.3% | 2025-09-30 |
| 2025-11-14 | 13G | Michael A Carusiindividual | 1.9M | 9.3% | 2025-09-30 |
| 2025-11-14 | 13G | Jean Georgeindividual | 1.9M | 9.3% | 2025-09-30 |
| 2025-11-14 | 13G | Henry A. Plain Jr.individual | 1.9M | 9.3% | 2025-09-30 |
| 2025-11-14 | 13G | Lightstone Ventures II, L.P.partnership | 1.8M | 8.7% | 2025-09-30 |
| 2025-11-14 | 13G | Lightstone Ventures II (A), L.P.partnership | 104K | 0.5% | 2025-09-30 |
| 2025-11-14 | 13G | Casey M. Tanseyindividual | 2.7M | 13.3% | 2025-09-30 |
| 2025-11-14 | 13G | Presidio Management Group XII, L.L.C.other entity | 2.7M | 13.1% | 2025-09-30 |
| 2025-11-14 | 13G | U.S. Venture Partners XII, L.P.partnership | 1.7M | 8.2% | 2025-09-30 |
13F holders
Tracked managers holding SI at their latest 13F. JSON3 of the 30 tracked managers held SI at their latest 13F, $1.6M in total at quarter-end prices. Citadel Advisors is the largest at $746K (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 0 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Citadel Advisors | 2026-06-30 | 37K | $746K | 0.00% | +23K |
| Point72 Asset Management | 2026-06-30 | 23K | $465K | 0.00% | new |
| AQR Capital Management | 2026-06-30 | 20K | $401K | 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
Shoulder Innovations 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 Shoulder Innovations (SI), SEC CIK 1699350, listed on NYSE, classified by the SEC as surgical & medical instruments & apparatus. 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 2026-10-09.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-09-14.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 2026-08-07.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 2026-10-30.JSON and CSV
- Company record
- EDGAR filing index for CIK 1699350Ticker, 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 surgical & medical instruments & apparatus
Other company pages
Datasets
Frequently Asked Questions
How much of SI is sold short?
710,108 shares were held short at the 2026-10-15 settlement, 6.3 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 SI's daily short volume?
On 2026-11-03, 36,308 of the 58,280 SI shares reported to FINRA were sold short, 62.3% of the day's reported volume. Short volume is a flow for one day, not a position.
Does SI have fails to deliver?
The SEC's latest file shows 4,324 SI shares failed to deliver at settlement 2026-10-09. Fails are reported per settlement date and published twice a month with a lag.
Are SI insiders buying or selling?
Insiders at SI reported 9 open-market sells worth $1.3M in the last 90 days and no open-market buys. Latest filing: Ball Robert Joseph (CEO & Executive Chairman) on 2026-10-30.
Have SI insiders filed to sell?
4 Form 144 notices on file for SI worth $5.9M at the prices reported; 2 in the last 90 days worth $654K. Latest: ROBERT BALL filed on 2026-09-14 to sell 10,175 shares ($188K) from 2026-09-14.
Who owns 5% or more of SI?
15 holders report 5% or more of SI in their latest filing, 5 on Schedule 13D (active intent). The largest reported stake is Abigail P. Johnson at 17.7% of the class (3,673,960 shares), filed 2026-08-06 for an event on 2026-06-30.
Which tracked 13F managers own SI?
3 of the 30 tracked 13F managers held SI shares at their latest filing, $1.6M in all. The largest: Ken Griffin's Citadel Advisors (37K shares, $746K), Steve Cohen's Point72 Asset Management (23K shares, $465K), Cliff Asness's AQR Capital Management (20K shares, $401K).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.