Penumbra (PEN)
Penumbra on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on NYSE, classified by the SEC as surgical & medical instruments & apparatus.
2.3M
Short interest
settlement 2026-10-15
6.8
Days to cover
+2.0 days vs prior
47.6%
Short share of volume
2026-11-02
966
Fails to deliver
settlement 2026-10-14
Thu 14 Jan
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 PEN is 2,262,502 shares, up 456,560 shares over the last month. Over the last 48 readings it ranged from 1,224,870 shares (14 March 2025) to 2,437,639 shares (31 March 2026). At the reported average volume of 335K shares a day that is 6.8 days to cover.
Embed this chart.The embed keeps its attribution line.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 2,262,502 | +0.8% | 334,511 | 6.76 |
| 2026-09-30 | 2,245,649 | +24.4% | 472,607 | 4.75 |
| 2026-09-15 | 1,805,942 | +4.3% | 251,678 | 7.18 |
| 2026-08-31 | 1,731,493 | -4.8% | 287,615 | 6.02 |
| 2026-08-14 | 1,818,794 | -0.9% | 260,263 | 6.99 |
| 2026-07-31 | 1,836,046 | -13.6% | 438,245 | 4.19 |
| 2026-07-15 | 2,123,757 | +4.2% | 337,187 | 6.30 |
| 2026-06-30 | 2,037,620 | +2.5% | 399,599 | 5.10 |
| 2026-06-15 | 1,986,919 | +3.7% | 431,134 | 4.61 |
| 2026-05-29 | 1,916,131 | -0.0% | 460,934 | 4.16 |
| 2026-05-15 | 1,916,276 | +1.0% | 411,914 | 4.65 |
| 2026-04-30 | 1,896,966 | -5.5% | 578,714 | 3.28 |
| 2026-04-15 | 2,007,168 | -17.7% | 473,304 | 4.24 |
| 2026-03-31 | 2,437,639 | +18.3% | 655,384 | 3.72 |
| 2026-03-13 | 2,061,336 | +10.4% | 662,106 | 3.11 |
| 2026-02-27 | 1,866,429 | +0.2% | 622,723 | 3.00 |
| 2026-02-13 | 1,863,136 | +16.3% | 973,747 | 1.91 |
| 2026-01-30 | 1,601,731 | -7.0% | 1,765,973 | 1.00 |
| 2026-01-15 | 1,722,051 | +0.7% | 1,609,684 | 1.07 |
| 2025-12-31 | 1,709,674 | +6.3% | 395,786 | 4.32 |
| 2025-12-15 | 1,607,603 | +6.1% | 509,315 | 3.16 |
| 2025-11-28 | 1,514,769 | -10.2% | 495,947 | 3.05 |
| 2025-11-14 | 1,687,371 | -7.3% | 572,612 | 2.95 |
| 2025-10-31 | 1,819,291 | +5.0% | 394,744 | 4.61 |
| 2025-10-15 | 1,733,518 | +7.5% | 325,549 | 5.32 |
| 2025-09-30 | 1,612,966 | -18.5% | 418,495 | 3.85 |
| 2025-09-15 | 1,978,313 | +10.6% | 481,756 | 4.11 |
| 2025-08-29 | 1,789,005 | +9.6% | 466,082 | 3.84 |
| 2025-08-15 | 1,631,808 | +7.7% | 400,980 | 4.07 |
| 2025-07-31 | 1,515,865 | -17.2% | 594,901 | 2.55 |
| 2025-07-15 | 1,830,104 | -3.5% | 394,746 | 4.64 |
| 2025-06-30 | 1,896,883 | +24.6% | 465,474 | 4.08 |
| 2025-06-13 | 1,521,978 | +17.7% | 443,607 | 3.43 |
| 2025-05-30 | 1,293,518 | -14.4% | 447,528 | 2.89 |
| 2025-05-15 | 1,510,993 | -1.9% | 662,489 | 2.28 |
| 2025-04-30 | 1,540,416 | -1.9% | 659,258 | 2.34 |
| 2025-04-15 | 1,570,778 | +5.8% | 468,275 | 3.35 |
| 2025-03-31 | 1,485,054 | +21.2% | 425,427 | 3.49 |
| 2025-03-14 | 1,224,870 | -9.6% | 413,670 | 2.96 |
| 2025-02-28 | 1,355,515 | -19.2% | 672,193 | 2.02 |
| 2025-02-14 | 1,678,058 | +17.0% | 453,234 | 3.70 |
| 2025-01-31 | 1,434,305 | -23.4% | 442,201 | 3.24 |
| 2025-01-15 | 1,872,148 | +1.9% | 533,179 | 3.51 |
| 2024-12-31 | 1,836,735 | +3.0% | 334,909 | 5.48 |
| 2024-12-13 | 1,783,912 | -3.6% | 287,728 | 6.20 |
| 2024-11-29 | 1,850,438 | -3.8% | 295,224 | 6.27 |
| 2024-11-15 | 1,923,333 | -14.8% | 367,400 | 5.23 |
| 2024-10-31 | 2,255,992 | -15.0% | 405,238 | 5.57 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 2 November 2026, the short share of PEN volume is 47.6%, up 12.2 points over the last five sessions. Over the last 30 readings it ranged from 23.4% (22 October 2026) to 76.6% (7 October 2026). The latest reading is 2.3 points below the 30-session average of 49.9%, on 124K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-02 | 59K | 124K | 47.6% | 0 |
| 2026-10-30 | 72K | 141K | 50.7% | 83 |
| 2026-10-29 | 105K | 190K | 55.5% | 6 |
| 2026-10-28 | 150K | 329K | 45.6% | 0 |
| 2026-10-27 | 37K | 123K | 30.1% | 0 |
| 2026-10-26 | 58K | 164K | 35.4% | 10 |
| 2026-10-23 | 72K | 135K | 53.4% | 0 |
| 2026-10-22 | 36K | 155K | 23.4% | 4 |
| 2026-10-21 | 67K | 123K | 54.6% | 0 |
| 2026-10-20 | 70K | 140K | 49.8% | 367 |
| 2026-10-19 | 39K | 66K | 59.6% | 5 |
| 2026-10-16 | 57K | 100K | 57.7% | 28 |
| 2026-10-15 | 60K | 98K | 61.6% | 1 |
| 2026-10-14 | 59K | 102K | 58.0% | 25 |
| 2026-10-13 | 41K | 67K | 60.8% | 20 |
| 2026-10-12 | 58K | 120K | 48.3% | 0 |
| 2026-10-09 | 101K | 225K | 44.6% | 0 |
| 2026-10-08 | 86K | 128K | 66.8% | 0 |
| 2026-10-07 | 87K | 113K | 76.6% | 1 |
| 2026-10-06 | 66K | 129K | 51.2% | 1 |
| 2026-10-05 | 52K | 100K | 52.4% | 1 |
| 2026-10-02 | 54K | 106K | 50.7% | 0 |
| 2026-10-01 | 101K | 165K | 61.0% | 0 |
| 2026-09-30 | 71K | 141K | 50.0% | 0 |
| 2026-09-29 | 42K | 82K | 51.4% | 16 |
| 2026-09-28 | 28K | 108K | 25.8% | 0 |
| 2026-09-25 | 49K | 87K | 56.4% | 0 |
| 2026-09-24 | 66K | 171K | 38.8% | 0 |
| 2026-09-23 | 81K | 220K | 36.9% | 6 |
| 2026-09-22 | 167K | 385K | 43.5% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 14 October 2026, the fails-to-deliver balance in PEN is 966 shares, up 839 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (10 September 2026) to 16,654 shares (8 October 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-10-14 | 966 | $320.01 | $309K |
| 2026-10-13 | 127 | $320.96 | $41K |
| 2026-10-09 | 2 | $317.52 | $635 |
| 2026-10-08 | 16,654 | $316.35 | $5.3M |
| 2026-10-07 | 4,861 | $317.05 | $1.5M |
| 2026-10-02 | 203 | $318.00 | $65K |
| 2026-10-01 | 25 | $318.34 | $8K |
| 2026-09-30 | 1 | $318.86 | $319 |
| 2026-09-29 | 2 | $319.18 | $638 |
| 2026-09-28 | 4 | $318.89 | $1K |
| 2026-09-25 | 9 | $319.72 | $3K |
| 2026-09-24 | 557 | $319.44 | $178K |
| 2026-09-23 | 23 | $319.39 | $7K |
| 2026-09-10 | 1 | $319.57 | $320 |
| 2026-09-04 | 301 | $321.14 | $97K |
| 2026-09-02 | 2,134 | $322.58 | $688K |
| 2026-08-28 | 1,261 | $321.00 | $405K |
| 2026-08-24 | 17 | $325.18 | $6K |
| 2026-08-21 | 1,378 | $323.76 | $446K |
| 2026-08-20 | 17 | $326.84 | $6K |
| 2026-08-19 | 4 | $324.75 | $1K |
| 2026-08-18 | 20 | $327.17 | $7K |
| 2026-08-17 | 40 | $327.02 | $13K |
| 2026-08-13 | 9 | $326.58 | $3K |
| 2026-08-12 | 16,343 | $326.28 | $5.3M |
| 2026-08-11 | 1,602 | $325.98 | $522K |
| 2026-08-10 | 176 | $324.66 | $57K |
| 2026-08-06 | 9 | $323.21 | $3K |
| 2026-08-05 | 307 | $324.22 | $100K |
| 2026-08-03 | 478 | $321.19 | $154K |
Insider trades
SEC Form 4, newest first. JSONNo open-market insider trades were reported for PEN in the last 90 days. The most recent filings are listed below. Latest filing: Narayan Shruthi (President) on 2026-10-15.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-10-15 | Narayan Shruthi | President | Tax withholding | 1K | $321.20 | $439K | 31K |
| 2026-09-15 | Narayan Shruthi | President | Tax withholding | 1K | $318.43 | $392K | 33K |
| 2026-08-17 | Narayan Shruthi | President | Grant | 3K | $0.00 | $0 | 34K |
| 2026-05-19 | Elsesser Adam | CEO | Gift | 77K | $0.00 | $0 | 683K |
| 2026-04-02 | Grewal Harpreet | Director | Sell | 100 | $328.22 | $33K | 9K |
| 2026-03-15 | Shiu Lambert | Chief Accounting Officer | Tax withholding | 150 | $336.18 | $50K | 39K |
| 2026-03-15 | Yuen Maggie | Chief Financial Officer | Tax withholding | 186 | $336.18 | $63K | 18K |
| 2026-03-15 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Tax withholding | 186 | $336.18 | $63K | 67K |
| 2026-03-15 | Narayan Shruthi | President | Tax withholding | 117 | $336.18 | $39K | 31K |
| 2026-03-02 | Yuen Maggie | Chief Financial Officer | Sell | 2K | $342.30 | $832K | 18K |
| 2026-02-17 | Shiu Lambert | Chief Accounting Officer | Grant | 2K | $0.00 | $0 | 39K |
| 2026-02-17 | Yuen Maggie | Chief Financial Officer | Grant | 3K | $0.00 | $0 | 21K |
| 2026-02-17 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Grant | 3K | $0.00 | $0 | 67K |
| 2026-02-17 | Narayan Shruthi | President | Grant | 3K | $0.00 | $0 | 31K |
| 2026-02-15 | Shiu Lambert | Chief Accounting Officer | Tax withholding | 412 | $339.30 | $140K | 37K |
| 2026-02-15 | Yuen Maggie | Chief Financial Officer | Tax withholding | 481 | $339.30 | $163K | 18K |
| 2026-02-15 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Tax withholding | 482 | $339.30 | $164K | 65K |
| 2026-02-15 | Narayan Shruthi | President | Tax withholding | 705 | $339.30 | $239K | 28K |
| 2026-02-13 | Shiu Lambert | Chief Accounting Officer | Grant | 2K | $0.00 | $0 | 38K |
| 2026-02-13 | Yuen Maggie | Chief Financial Officer | Grant | 3K | $0.00 | $0 | 19K |
| 2026-02-13 | Sarna Surbhi | Director | Grant | 589 | $0.00 | $0 | 4K |
| 2026-02-13 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Grant | 3K | $0.00 | $0 | 65K |
| 2026-02-13 | Wilder Thomas | Director | Grant | 589 | $0.00 | $0 | 589 |
| 2026-02-13 | O'Rourke Bridget | Director | Grant | 589 | $0.00 | $0 | 6K |
| 2026-02-13 | Narayan Shruthi | President | Grant | 3K | $0.00 | $0 | 29K |
| 2026-02-13 | Leeds Janet | Director | Grant | 589 | $0.00 | $0 | 7K |
| 2026-02-13 | Grewal Harpreet | Director | Grant | 589 | $0.00 | $0 | 9K |
| 2026-02-13 | Bose Arani | Director | Grant | 589 | $0.00 | $0 | 1K |
| 2026-01-15 | Narayan Shruthi | President | Tax withholding | 286 | $350.49 | $100K | 26K |
| 2026-01-06 | Grewal Harpreet | Director | Sell | 186 | $312.64 | $58K | 8K |
| 2026-01-02 | Wilder Thomas | Director | Sell | 186 | $310.72 | $58K | 0 |
| 2025-12-15 | Shiu Lambert | Chief Accounting Officer | Tax withholding | 300 | $309.15 | $93K | 35K |
| 2025-12-15 | Yuen Maggie | Chief Financial Officer | Tax withholding | 565 | $309.15 | $175K | 16K |
| 2025-12-15 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Tax withholding | 1K | $309.15 | $349K | 63K |
| 2025-12-11 | Bose Arani | Director | Sell | 2K | $312.20 | $592K | 258K |
| 2025-12-11 | Bose Arani | Director | Sell | 4K | $311.47 | $1.1M | 260K |
| 2025-12-11 | Bose Arani | Director | Sell | 2K | $310.50 | $646K | 264K |
| 2025-12-11 | Bose Arani | Director | Sell | 4 | $308.00 | $1K | 266K |
| 2025-12-11 | Bose Arani | Director | Sell | 520 | $307.10 | $160K | 266K |
| 2025-12-11 | Bose Arani | Director | Sell | 5K | $306.60 | $1.5M | 266K |
| 2025-12-11 | Bose Arani | Director | Sell | 2K | $305.19 | $620K | 271K |
| 2025-12-05 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 300 | $300.13 | $90K | 64K |
| 2025-12-02 | Grewal Harpreet | Director | Sell | 100 | $292.98 | $29K | 8K |
| 2025-12-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 10 | $298.02 | $3K | 64K |
| 2025-12-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 78 | $297.50 | $23K | 64K |
| 2025-12-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 80 | $296.27 | $24K | 64K |
| 2025-12-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 144 | $295.38 | $43K | 64K |
| 2025-12-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 155 | $294.52 | $46K | 64K |
| 2025-12-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 39 | $293.27 | $11K | 65K |
| 2025-12-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 94 | $292.09 | $27K | 65K |
| 2025-11-26 | Bose Arani | Director | Gift | 2K | $0.00 | $0 | 273K |
| 2025-11-25 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 2K | $300.06 | $540K | 65K |
| 2025-11-25 | Bose Arani | Director | Sell | 8K | $300.19 | $2.3M | 275K |
| 2025-11-21 | Bose Arani | Director | Sell | 162 | $291.09 | $47K | 283K |
| 2025-11-21 | Bose Arani | Director | Sell | 7K | $290.55 | $2.1M | 283K |
| 2025-11-17 | Shiu Lambert | Chief Accounting Officer | Grant | 4K | $0.00 | $0 | 36K |
| 2025-11-17 | Yuen Maggie | Chief Financial Officer | Grant | 4K | $0.00 | $0 | 17K |
| 2025-11-17 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Grant | 4K | $0.00 | $0 | 67K |
| 2025-11-15 | Shiu Lambert | Chief Accounting Officer | Tax withholding | 506 | $280.07 | $142K | 32K |
| 2025-11-15 | Shiu Lambert | Chief Accounting Officer | Tax withholding | 346 | $280.07 | $97K | 32K |
| 2025-11-15 | Yuen Maggie | Chief Financial Officer | Tax withholding | 327 | $280.07 | $92K | 13K |
| 2025-11-15 | Yuen Maggie | Chief Financial Officer | Tax withholding | 364 | $280.07 | $102K | 13K |
| 2025-11-15 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Tax withholding | 545 | $280.07 | $153K | 63K |
| 2025-11-15 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Tax withholding | 156 | $280.07 | $44K | 64K |
| 2025-11-15 | Narayan Shruthi | President | Tax withholding | 358 | $280.07 | $100K | 27K |
| 2025-11-10 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 36 | $269.56 | $10K | 64K |
| 2025-11-10 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 76 | $269.01 | $20K | 64K |
| 2025-11-10 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 85 | $267.56 | $23K | 64K |
| 2025-11-10 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 211 | $266.72 | $56K | 64K |
| 2025-11-10 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 168 | $265.93 | $45K | 64K |
| 2025-11-10 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 13 | $264.89 | $3K | 64K |
| 2025-11-10 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 11 | $263.58 | $3K | 64K |
| 2025-11-04 | Grewal Harpreet | Director | Sell | 186 | $227.58 | $42K | 9K |
| 2025-10-15 | Narayan Shruthi | President | Tax withholding | 1K | $252.61 | $327K | 27K |
| 2025-10-02 | Grewal Harpreet | Director | Sell | 186 | $248.61 | $46K | 9K |
| 2025-10-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 35 | $246.93 | $9K | 65K |
| 2025-10-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 5 | $256.63 | $1K | 64K |
| 2025-10-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 36 | $254.96 | $9K | 64K |
| 2025-10-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 20 | $254.05 | $5K | 64K |
| 2025-10-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 41 | $252.36 | $10K | 64K |
| 2025-10-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 144 | $251.81 | $36K | 64K |
| 2025-10-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 66 | $250.84 | $17K | 65K |
| 2025-10-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 14 | $249.71 | $3K | 65K |
| 2025-10-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 23 | $248.67 | $6K | 65K |
| 2025-10-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 125 | $247.79 | $31K | 65K |
| 2025-10-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 35 | $245.68 | $9K | 65K |
| 2025-10-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 32 | $244.93 | $8K | 65K |
| 2025-10-01 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 24 | $243.61 | $6K | 65K |
| 2025-10-01 | Wilder Thomas | Director | Sell | 186 | $253.93 | $47K | 186 |
| 2025-09-15 | Narayan Shruthi | President | Grant | 9K | $0.00 | $0 | 28K |
| 2025-09-03 | Elsesser Adam | CEO | Sell | 1K | $270.81 | $325K | 182K |
| 2025-09-03 | Elsesser Adam | CEO | Sell | 8K | $270.09 | $2.0M | 184K |
| 2025-09-03 | Elsesser Adam | CEO | Sell | 5K | $269.26 | $1.3M | 191K |
| 2025-09-03 | Elsesser Adam | CEO | Sell | 2K | $268.41 | $631K | 196K |
| 2025-09-03 | Elsesser Adam | CEO | Exercise or conversion | 28K | $30.00 | $839K | 198K |
| 2025-09-02 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 60 | $273.12 | $16K | 65K |
| 2025-09-02 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 105 | $272.23 | $29K | 65K |
| 2025-09-02 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 61 | $271.22 | $17K | 65K |
| 2025-09-02 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 152 | $270.19 | $41K | 65K |
| 2025-09-02 | Roberts Johanna | EVP, Gen. Counsel & Secretary | Sell | 222 | $269.20 | $60K | 65K |
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. JSON11 Form 144 notices on file for PEN worth $10.6M at the prices reported; 0 in the last 90 days worth $0. Latest: Grewal Harpreet filed on 2026-04-02 to sell 100 shares ($33K) from 2026-04-02.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-04-02 | Grewal HarpreetDirector | 100 | $33K | 0.000% | 2026-04-02 | Fidelity Brokerage Services LLC |
| 2026-03-02 | MAGGIE YUENOfficer | 2K | $832K | 0.006% | 2026-03-02 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-01-06 | Grewal HarpreetDirector | 186 | $58K | 0.000% | 2026-01-06 | Fidelity Brokerage Services LLC |
| 2026-01-02 | THOMAS WILDERDirector | 186 | $58K | 0.000% | 2026-01-02 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-02 | Grewal HarpreetDirector | 100 | $29K | 0.000% | 2025-12-02 | Fidelity Brokerage Services LLC |
| 2025-11-25 | Johanna RobertsOfficer | 2K | $626K | 0.005% | 2025-11-25 | J.P. Morgan Securities LLC |
| 2025-11-21 | Arani BoseAffiliate | 30K | $8.4M | 0.077% | 2025-11-21 | J.P. Morgan Securities LLC |
| 2025-11-04 | Grewal HarpreetDirector | 186 | $42K | 0.000% | 2025-11-04 | Fidelity Brokerage Services LLC |
| 2025-10-02 | Grewal HarpreetDirector | 186 | $46K | 0.000% | 2025-10-02 | Fidelity Brokerage Services LLC |
| 2025-10-01 | Johanna RobertsOfficer | 2K | $456K | 0.005% | 2025-10-01 | J.P. Morgan Securities LLC |
| 2025-10-01 | THOMAS WILDERDirector | 186 | $47K | 0.000% | 2025-10-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON2 holders report 5% or more of PEN in their latest filing, all on Schedule 13G (passive). The largest reported stake is Barclays PLC at 6.0% of the class (2,342,118 shares), filed 2026-08-13 for an event on 2026-06-30.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-08-13 | 13G | Barclays PLCparent holding company | 2.3M | 6.0% | 2026-06-30 |
| 2026-04-30 | 13G | Vanguard Capital Managementinvestment adviser | 2.0M | 5.1% | 2026-03-31 |
| 2026-03-27 | 13G/Ano. 8 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
| 2026-02-06 | 13G/Ano. 11 | FMR LLCparent holding company | 1.8M | 4.7% | 2026-01-30 |
| 2026-02-06 | 13G/Ano. 11 | Abigail P. Johnsonindividual | 1.8M | 4.7% | 2026-01-30 |
13F holders
Tracked managers holding PEN at their latest 13F. JSON8 of the 30 tracked managers held PEN at their latest 13F, $598.1M in total at quarter-end prices. Millennium Management is the largest at $221.2M (0.1% of its portfolio) as of 2026-06-30. Over the prior quarter 4 added shares and 4 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Millennium Management | 2026-06-30 | 701K | $221.2M | 0.08% | -398K |
| Citadel Advisors | 2026-06-30 | 449K | $141.7M | 0.02% | +246K |
| Two Sigma Investments | 2026-06-30 | 428K | $135.2M | 0.10% | +370K |
| D. E. Shaw & Co. | 2026-06-30 | 197K | $62.3M | 0.03% | -5K |
| Renaissance Technologies | 2026-06-30 | 80K | $25.1M | 0.03% | +77K |
| AQR Capital Management | 2026-06-30 | 32K | $10.0M | 0.00% | -46K |
| Point72 Asset Management | 2026-06-30 | 7K | $2.1M | 0.00% | new |
| Bridgewater Associates | 2026-06-30 | 2K | $499K | 0.00% | -8K |
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.
Financials
SEC XBRL, as filed. JSONIn Q3 FY 2026 (quarter ended 2026-09-30) Penumbra reported revenue of $410.1M, up 15.6% from the same quarter a year earlier, and net income of $42.3M (1.07 diluted EPS). In FY 2025 it generated $238.7M of operating cash flow.
- Cash
- $254.3M
- Equity
- $1.58B
- Total assets
- $2.03B
- Shares outstanding
- 39,414,385
Quarterly, last 8 quarters
| Quarter | Period end | Revenue | Net income | Margin | Diluted EPS |
|---|---|---|---|---|---|
| Q3 FY 2026 | 2026-09-30 | $410.1M | $42.3M | 10.3% | 1.07 |
| Q2 FY 2026 | 2026-06-30 | $390.0M | $34.8M | 8.9% | 0.88 |
| Q1 FY 2026 | 2026-03-31 | $374.8M | $32.6M | 8.7% | 0.82 |
| Q4 FY 2025derived | 2025-12-31 | $385.4M | $47.3M | 12.3% | n/a |
| Q3 FY 2025 | 2025-09-30 | $354.7M | $45.9M | 12.9% | 1.17 |
| Q2 FY 2025 | 2025-06-30 | $339.5M | $45.3M | 13.3% | 1.15 |
| Q1 FY 2025 | 2025-03-31 | $324.1M | $39.2M | 12.1% | 1.00 |
| Q4 FY 2024derived | 2024-12-31 | $315.5M | $33.7M | 10.7% | n/a |
Fiscal years, with buybacks and dividends
| Fiscal year | Ends | Revenue | Net income | Operating cash flow | Capex | Buybacks | Dividends |
|---|---|---|---|---|---|---|---|
| FY 2025 | 2025-12-31 | $1.40B | $177.7M | $238.7M | $63.7M | $0 | n/a |
| FY 2024 | 2024-12-31 | $1.19B | $14.0M | $168.5M | $21.2M | $100.4M | n/a |
| FY 2023 | 2023-12-31 | $1.06B | $91.0M | $97.3M | $15.2M | $0 | n/a |
| FY 2022 | 2022-12-31 | $847.1M | -$2.0M | -$55.7M | $19.3M | $0 | n/a |
| FY 2021 | 2021-12-31 | $747.6M | $5.3M | $9.5M | $21.2M | n/a | n/a |
Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-09-30; shares outstanding as of 2026-10-14 from the cover page.
What this page is
Penumbra 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 Penumbra (PEN), SEC CIK 1321732, 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 2026-11-02.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
- 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 2026-04-02.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
- Financials
- SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. Latest 2026-09-30.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 2026-10-29.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 2026-10-15.JSON and CSV
- Company record
- EDGAR filing index for CIK 1321732Ticker, 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 PEN is sold short?
2,262,502 shares were held short at the 2026-10-15 settlement, 6.8 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 PEN's daily short volume?
On 2026-11-02, 59,108 of the 124,161 PEN shares reported to FINRA were sold short, 47.6% of the day's reported volume. Short volume is a flow for one day, not a position.
Does PEN have fails to deliver?
The SEC's latest file shows 966 PEN shares failed to deliver at settlement 2026-10-14. Fails are reported per settlement date and published twice a month with a lag.
Are PEN insiders buying or selling?
No open-market insider trades were reported for PEN in the last 90 days. The most recent filings are listed below. Latest filing: Narayan Shruthi (President) on 2026-10-15.
Have PEN insiders filed to sell?
11 Form 144 notices on file for PEN worth $10.6M at the prices reported; 0 in the last 90 days worth $0. Latest: Grewal Harpreet filed on 2026-04-02 to sell 100 shares ($33K) from 2026-04-02.
Who owns 5% or more of PEN?
2 holders report 5% or more of PEN in their latest filing, all on Schedule 13G (passive). The largest reported stake is Barclays PLC at 6.0% of the class (2,342,118 shares), filed 2026-08-13 for an event on 2026-06-30.
What did PEN report last quarter?
In Q3 FY 2026 (quarter ended 2026-09-30) Penumbra reported revenue of $410.1M, up 15.6% from the same quarter a year earlier, and net income of $42.3M (1.07 diluted EPS). In FY 2025 it generated $238.7M of operating cash flow.
Which tracked 13F managers own PEN?
8 of the 30 tracked 13F managers held PEN shares at their latest filing, $598.1M in all. The largest: Izzy Englander's Millennium Management (701K shares, $221.2M), Ken Griffin's Citadel Advisors (449K shares, $141.7M), Two Sigma Investments (428K shares, $135.2M), D. E. Shaw & Co. (197K shares, $62.3M), Renaissance Technologies (80K shares, $25.1M), Cliff Asness's AQR Capital Management (32K shares, $10.0M). The table above lists all 8.
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.