XOOMAR

IMPINJ INC (PI)

Every FINRA and SEC series the site collects for IMPINJ INC: short interest with days to cover, daily short sale volume, fails to deliver and Form 4 insider trades. Listed on Nasdaq, classified by the SEC as electronic components, nec.

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3.0M

Short interest

settlement 2026-08-14

5.8

Days to cover

-1.5% vs prior

44.7%

Short share of volume

2026-09-11

201

Fails to deliver

settlement 2026-08-10

-$264K

Insider flow, 90 days

0 buys, 1 sells

As of 2026-09-11.

Short interest

FINRA, twice a month; the last 12 months shown, all 48 settlements in the JSON

As of 14 August 2026, short interest in PI is 2,955,390 shares, down 395,300 shares over the last month. Over the last 48 readings it ranged from 2,543,075 shares (30 January 2026) to 4,492,402 shares (31 January 2025). At the reported average volume of 511K shares a day that is 5.8 days to cover, elevated.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-08-142,955,390-1.5%510,6845.79
2026-07-313,001,563-10.4%468,6036.41
2026-07-153,350,690+0.5%275,35512.17
2026-06-303,335,442-2.4%452,6517.37
2026-06-153,416,450+5.0%448,3487.62
2026-05-293,253,966+12.3%455,4847.14
2026-05-152,897,261-5.0%484,6285.98
2026-04-303,050,491-0.8%664,1884.59
2026-04-153,074,460-0.5%292,71510.50
2026-03-313,091,059+3.0%474,4596.51
2026-03-133,000,911+0.8%835,7333.59
2026-02-272,978,592+8.3%506,7985.88
2026-02-132,750,803+8.2%1,174,8942.34
2026-01-302,543,075-3.1%643,7443.95
2026-01-152,624,140-0.7%711,4803.69
2025-12-312,643,182-6.5%571,1854.63
2025-12-152,827,539-5.0%657,9414.30
2025-11-282,976,184+15.6%504,8645.90
2025-11-142,574,699+0.4%524,9084.91
2025-10-312,564,318-17.9%636,8774.03
2025-10-153,121,424-0.1%453,2956.89
2025-09-303,125,945-5.1%492,9816.34
2025-09-153,294,310-14.7%737,6794.47
2025-08-293,862,973+1.0%394,8969.78

Daily short volume

FINRA Reg SHO, last 60 sessions. JSON

As of 11 September 2026, the short share of PI volume is 44.7%, down 19.2 points over the last five sessions. Over the last 52 readings it ranged from 41.2% (7 July 2026) to 85.9% (25 August 2026). The latest reading sits at the bottom of that range. The latest reading is 19.4 points below the 30-session average of 64.1%, on 208K shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-09-1193K208K44.7%213
2026-09-1076K107K71.5%1,194
2026-09-0971K129K55.5%100
2026-09-0883K128K64.9%27
2026-09-0473K115K63.3%0
2026-09-0382K129K63.9%1,203
2026-09-02121K168K71.7%0
2026-09-0174K128K57.6%89
2026-08-3188K111K79.1%0
2026-08-2897K126K77.0%0
2026-08-2784K117K71.2%0
2026-08-2693K116K80.3%0
2026-08-25148K172K85.9%12
2026-08-2463K102K62.2%0
2026-08-2185K146K58.1%38
2026-08-2054K87K62.2%0
2026-08-1941K73K55.6%0
2026-08-1865K96K68.0%0
2026-08-1765K104K62.5%320
2026-08-1461K119K50.9%20
2026-08-1385K147K58.3%11
2026-08-12111K144K77.3%0
2026-08-1198K164K59.6%0
2026-08-10141K205K68.9%10
2026-08-07179K281K63.9%201
2026-08-06107K175K60.8%66
2026-08-0596K172K55.7%19
2026-08-04177K277K63.7%0
2026-08-03146K318K46.0%75
2026-07-31141K226K62.2%2

Fails to deliver

SEC, by settlement date. JSON

As of 10 August 2026, the fails-to-deliver balance in PI is 201 shares, down 75 shares over the last settlement date. Over the last 52 readings it ranged from 1 share (17 July 2026) to 50,463 shares (3 June 2026). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-08-10201$183.36$37K
2026-08-04276$161.44$45K
2026-08-0314,082$151.36$2.1M
2026-07-31133$147.49$20K
2026-07-271$127.55$128
2026-07-23475$138.02$66K
2026-07-20808$138.37$112K
2026-07-171$140.76$141
2026-07-068,688$141.58$1.2M
2026-07-014,055$143.23$581K
2026-06-3021,781$133.30$2.9M
2026-06-1891$123.62$11K
2026-06-0350,463$143.26$7.2M
2026-06-0247,379$142.67$6.8M
2026-04-246,204$120.93$750K
2026-04-226,820$118.32$807K
2026-04-21135$112.86$15K
2026-04-171,274$110.44$141K
2026-04-02902$101.94$92K
2026-03-3127$96.07$3K
2026-03-3020$98.75$2K
2026-03-2754$101.78$5K
2026-03-26962$104.08$100K
2026-03-2326,909$98.11$2.6M
2026-03-1941$98.64$4K
2026-03-17108$98.50$11K
2026-03-0619,447$99.61$1.9M
2026-02-27328$122.83$40K
2026-02-2410,725$118.98$1.3M
2026-02-181,396$126.13$176K

Insider trades

SEC Form 4, newest first, 50 of 100 shown. JSON

Insiders at PI reported 1 open-market sell worth $264K in the last 90 days and no open-market buys. Sells alone are a weak signal; insiders sell for tax, diversification and estate reasons all the time. Latest filing: DIORIO CHRIS PH.D. (CHIEF EXECUTIVE OFFICER) on 2026-08-20.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-08-20DIORIO CHRIS PH.D.CHIEF EXECUTIVE OFFICERTax withholding1K$159.73$236K364K
2026-08-20DIORIO CHRIS PH.D.CHIEF EXECUTIVE OFFICEROption exercise4K$0.00$0366K
2026-08-20Baker CaryCHIEF FINANCIAL OFFICERTax withholding685$159.73$109K89K
2026-08-20Baker CaryCHIEF FINANCIAL OFFICEROption exercise2K$0.00$090K
2026-08-17DIORIO CHRIS PH.D.CHIEF EXECUTIVE OFFICERGift10K$0.00$0362K
2026-08-10Baker CaryCHIEF FINANCIAL OFFICERSell1K$185.00$264K88K
2026-06-23Baker CaryCHIEF FINANCIAL OFFICERTax withholding424$125.22$53K90K
2026-06-23Baker CaryCHIEF FINANCIAL OFFICEROption exercise597$0.00$090K
2026-06-23Baker CaryCHIEF FINANCIAL OFFICEROption exercise479$0.00$089K
2026-06-09SYLEBRA CAPITAL LLCn/aSell12K$127.36$1.5M783K
2026-06-08SYLEBRA CAPITAL LLCn/aSell33K$130.07$4.3M795K
2026-06-08SYLEBRA CAPITAL LLCn/aSell13K$125.97$1.6M828K
2026-06-05SYLEBRA CAPITAL LLCn/aSell36K$122.50$4.4M841K
2026-06-05SYLEBRA CAPITAL LLCn/aSell12K$128.87$1.5M876K
2026-06-04SYLEBRA CAPITAL LLCn/aSell33K$136.84$4.6M888K
2026-06-03SYLEBRA CAPITAL LLCn/aSell6K$139.17$879K921K
2026-06-02SYLEBRA CAPITAL LLCn/aSell39K$142.31$5.5M928K
2026-06-01SYLEBRA CAPITAL LLCn/aSell7K$144.29$1.0M967K
2026-05-29SYLEBRA CAPITAL LLCn/aSell49K$150.78$7.3M974K
2026-05-28WASHINGTON MIRONn/aOption exercise3K$0.00$05K
2026-05-28Rao Meeran/aOption exercise3K$0.00$011K
2026-05-28PADVAL UMESHn/aOption exercise3K$0.00$07K
2026-05-28Sanghi Steven/aOption exercise3K$0.00$013K
2026-05-28Gibson Daniel Patrickn/aOption exercise3K$0.00$023K
2026-05-26DIORIO CHRIS PH.D.CHIEF EXECUTIVE OFFICERJ180K$156.68$28.2M570K
2026-05-11SYLEBRA CAPITAL LLCn/aSell13K$154.46$2.0M1.0M
2026-05-11SYLEBRA CAPITAL LLCn/aSell24K$154.46$3.7M1.0M
2026-05-08SYLEBRA CAPITAL LLCn/aSell10K$149.97$1.4M1.1M
2026-05-08SYLEBRA CAPITAL LLCn/aSell2K$151.32$236K1.1M
2026-05-08SYLEBRA CAPITAL LLCn/aSell26K$152.73$4.0M1.1M
2026-05-07SYLEBRA CAPITAL LLCn/aSell36K$152.73$5.5M1.1M
2026-03-23DIORIO CHRIS PH.D.CHIEF EXECUTIVE OFFICERTax withholding2K$101.17$224K390K
2026-03-23DIORIO CHRIS PH.D.CHIEF EXECUTIVE OFFICEROption exercise2K$0.00$0393K
2026-03-23DIORIO CHRIS PH.D.CHIEF EXECUTIVE OFFICEROption exercise1K$0.00$0391K
2026-03-23DIORIO CHRIS PH.D.CHIEF EXECUTIVE OFFICEROption exercise3K$0.00$0389K
2026-03-23Baker CaryCHIEF FINANCIAL OFFICERTax withholding732$101.17$74K89K
2026-03-23Baker CaryCHIEF FINANCIAL OFFICEROption exercise597$0.00$090K
2026-03-23Baker CaryCHIEF FINANCIAL OFFICEROption exercise479$0.00$089K
2026-03-23Baker CaryCHIEF FINANCIAL OFFICEROption exercise782$0.00$089K
2026-02-20DIORIO CHRIS PH.D.CHIEF EXECUTIVE OFFICERTax withholding7K$127.92$951K387K
2026-02-20DIORIO CHRIS PH.D.CHIEF EXECUTIVE OFFICERGrant22K$0.00$0394K
2026-02-20Baker CaryCHIEF FINANCIAL OFFICERTax withholding2K$127.92$286K88K
2026-02-20Baker CaryCHIEF FINANCIAL OFFICERGrant9K$0.00$090K
2026-02-17DIORIO CHRIS PH.D.CHIEF EXECUTIVE OFFICERGift2K$0.00$0373K
2025-12-23DIORIO CHRIS PH.D.CHIEF EXECUTIVE OFFICERTax withholding2K$171.99$381K374K
2025-12-23DIORIO CHRIS PH.D.CHIEF EXECUTIVE OFFICEROption exercise2K$0.00$0377K
2025-12-23DIORIO CHRIS PH.D.CHIEF EXECUTIVE OFFICEROption exercise1K$0.00$0375K
2025-12-23DIORIO CHRIS PH.D.CHIEF EXECUTIVE OFFICEROption exercise3K$0.00$0374K
2025-12-23Baker CaryCHIEF FINANCIAL OFFICERTax withholding732$171.99$126K82K
2025-12-23Baker CaryCHIEF FINANCIAL OFFICEROption exercise596$0.00$082K

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 the rarer, stronger signal.

Planned sales (Form 144)

Newest first. JSON

1 Form 144 notice on file for PI worth $1.9M at the prices reported; 1 in the last 90 days worth $1.9M. Latest: Baker Cary filed on 2026-08-10 to sell 10,321 shares ($1.9M) from 2026-08-10.

FiledSellerSharesMarket valueOf outstandingSale fromBroker
2026-08-10Baker CaryOfficer10K$1.9M0.034%2026-08-10Charles Schwab & Co., Inc.

Large holders (13D and 13G)

One row per reporting person, newest filing first. JSON

1 holder above 5% has filed on PI, all on Schedule 13G (passive). The largest reported stake is STATE STREET CORPORATION at 5.6% of the class (1,700,585 shares), filed 2026-08-07 for an event on 2026-06-30.

FiledFormHolderSharesOf classEvent
2026-08-0713GSTATE STREET CORPORATIONparent holding company1.7M5.6%2026-06-30

13F holders

Tracked managers holding PI at their latest 13F. JSON

7 of the 30 tracked managers held PI at their latest 13F, $212.6M in total at quarter-end prices. Millennium Management is the largest at $119.5M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 4 cut.

FundQuarterSharesValueOf portfolioChange in shares
Millennium Management2026-06-30834K$119.5M0.04%+732K
Point72 Asset Management2026-06-30419K$59.9M0.07%+116K
Citadel Advisors2026-06-30191K$27.4M0.00%-952K
D. E. Shaw & Co.2026-06-3019K$2.7M0.00%-949
Citadel Advisors2026-06-301.1M$1.6M0.00%+1000K
AQR Capital Management2026-06-309K$1.2M0.00%-2K
Soros Fund Management2026-06-302K$305K0.00%-2K

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. JSON

In Q2 2026 (quarter ended 2026-06-30) IMPINJ INC reported revenue of $108.4M, up 10.7% from the same quarter a year earlier, and net income of $12.2M (0.39 diluted EPS). In FY 2025 it generated $58.7M of operating cash flow. As of 2026-06-30, cash was $38.6M against $241.9M of debt.

Cash
$38.6M
Debt
$241.9M
Equity
$231.6M
Total assets
$534.7M
Shares outstanding
30,554,413

Quarterly, last 8 quarters

QuarterPeriod endRevenueNet incomeMarginDiluted EPS
Q2 20262026-06-30$108.4M$12.2M11.3%0.39
Q1 20262026-03-31$74.3M-$25.3M-34.0%-0.83
Q4 2025derived2025-12-31$92.8Mn/an/an/a
Q3 20252025-09-30$96.1M-$12.8M-13.3%-0.44
Q2 20252025-06-30$97.9M$11.6M11.8%0.39
Q1 20252025-03-31$74.3M-$8.5M-11.4%-0.30
Q4 2024derived2024-12-31$91.6Mn/an/an/a
Q3 20242024-09-30$95.2M$221K0.2%0.01

Fiscal years, with buybacks and dividends

Fiscal yearEndsRevenueNet incomeOperating cash flowCapexBuybacksDividends
FY 20252025-12-31$361.1Mn/a$58.7M$12.9Mn/an/a
FY 20242024-12-31$366.1Mn/a$128.3M$17.1Mn/an/a
FY 20232023-12-31$307.5Mn/a-$49.4M$18.6Mn/an/a
FY 20222022-12-31$257.8Mn/a$641K$12.1Mn/an/a
FY 20212021-12-31$190.3Mn/a$6.5M$16.2Mn/an/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 cash paid to repurchase common stock in the year (XBRL PaymentsForRepurchaseOfCommonStock), not authorizations. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-07-17 from the cover page.

What this page is

IMPINJ INC 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 pulls every series the site collects for one ticker onto one URL, keyed by the SEC's own ticker list, 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 summary sentence built from the rows (last value, change, range with dates) and its own JSON and CSV links. Nothing on the page is written by a model; the sentences change only when the data does. A page exists only for companies with data in at least two series, and every section says when its source last updated.

This page follows IMPINJ INC (PI), SEC CIK 1114995, listed on Nasdaq, classified by the SEC as electronic components, nec. The cross-market tables live on the short interest and insider transactions hubs.

Source and method

Short interest
FINRA consolidated short interestTwice a month, about eight business days after settlement. Latest 2026-08-14.JSON and CSV
Daily short volume
FINRA Reg SHO daily filesEvery trading day, loaded the following morning. Latest 2026-09-11.JSON and CSV
Fails to deliver
SEC fails-to-deliver dataTwice a month, a few weeks after the half month ends. Latest 2026-08-10.JSON and CSV
Planned sales
SEC EDGAR Form 144EDGAR read every 30 minutes; a notice is filed on or before the sell order. Latest 2026-08-10.JSON and CSV
Large holders
SEC EDGAR Schedule 13D and 13GEDGAR read every 30 minutes; 13D within five business days of crossing 5%, 13G on the passive schedule. Latest 2026-08-07.JSON and CSV
13F holders
SEC EDGAR Form 13F-HRQuarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Financials
SEC XBRL company factsRefreshed weekly from the SEC's structured data; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
Insider trades
SEC EDGAR Form 4EDGAR read every 30 minutes; filings are due two business days after the trade. Latest 2026-08-20.JSON and CSV
Company record
EDGAR filing index for CIK 1114995Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits
30 requests a minute without a key, 120 a minute with a key from a free account.

Data checks. Every dataset is checked against its source once a day. This dataset passed the last run, 13 Sep 05:40 UTC.

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 crowded short are the combination that has historically preceded squeezes; insider sells next to a crowded short 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.

Datasets

Frequently Asked Questions

How much of PI is sold short?
2,955,390 shares were held short at the 2026-08-14 settlement, 5.8 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 PI's daily short volume?
On 2026-09-11, 93,145 of the 208,221 PI shares reported to FINRA were sold short, 44.7% of the day's reported volume. Short volume is a flow for one day, not a position.
Does PI have fails to deliver?
The SEC's latest file shows 201 PI shares failed to deliver at settlement 2026-08-10. Fails are reported per settlement date and published twice a month with a lag.
Are PI insiders buying or selling?
Insiders at PI reported 1 open-market sell worth $264K in the last 90 days and no open-market buys. Sells alone are a weak signal; insiders sell for tax, diversification and estate reasons all the time. Latest filing: DIORIO CHRIS PH.D. (CHIEF EXECUTIVE OFFICER) on 2026-08-20.
Have PI insiders filed to sell?
1 Form 144 notice on file for PI worth $1.9M at the prices reported; 1 in the last 90 days worth $1.9M. Latest: Baker Cary filed on 2026-08-10 to sell 10,321 shares ($1.9M) from 2026-08-10.
Who owns more than 5% of PI?
1 holder above 5% has filed on PI, all on Schedule 13G (passive). The largest reported stake is STATE STREET CORPORATION at 5.6% of the class (1,700,585 shares), filed 2026-08-07 for an event on 2026-06-30.
What did PI report last quarter?
In Q2 2026 (quarter ended 2026-06-30) IMPINJ INC reported revenue of $108.4M, up 10.7% from the same quarter a year earlier, and net income of $12.2M (0.39 diluted EPS). In FY 2025 it generated $58.7M of operating cash flow. As of 2026-06-30, cash was $38.6M against $241.9M of debt.
Which funds hold PI?
7 of the 30 tracked managers held PI at their latest 13F, $212.6M in total at quarter-end prices. Millennium Management is the largest at $119.5M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 4 cut.

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.