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Natural Alternatives International (NAII)

Natural Alternatives International on one page: short interest, daily short volume, fails to deliver, large holders, 13F holders and insider trades. Listed on Nasdaq, classified by the SEC as medicinal chemicals & botanical products.

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7K

Short interest

settlement 2026-09-30

1.0

Days to cover

-0.1 days vs prior

1.6%

Short share of volume

2026-10-23

2,234

Fails to deliver

settlement 2026-09-24

$0

Insider flow, 90 days

0 buys, 0 sells

As of 2026-10-23.

Short interest

FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSON

As of 30 September 2026, short interest in NAII is 6,864 shares, down 453 shares over the last month. Over the last 48 readings it ranged from 1,228 shares (13 February 2026) to 27,814 shares (15 August 2025). At the reported average volume of 24K shares a day that is 1.0 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-09-306,864-47.8%24,1411.00
2026-09-1513,142+79.6%12,5391.05
2026-08-317,317-70.6%27,4211.00
2026-08-1424,895-3.5%133,0741.00
2026-07-3125,810+175.5%12,2162.11
2026-07-159,367+41.0%14,2631.00
2026-06-306,641+170.9%46,9511.00
2026-06-152,451-44.8%17,6511.00
2026-05-294,437+163.2%18,6921.00
2026-05-151,686-52.6%13,3261.00
2026-04-303,559-32.4%21,7651.00
2026-04-155,263-50.8%19,7081.00
2026-03-3110,701+169.1%42,0581.00
2026-03-133,977-28.1%16,0691.00
2026-02-275,535+350.7%27,6271.00
2026-02-131,228-39.7%22,3811.00
2026-01-302,036-83.0%9,0271.00
2026-01-1511,999+94.8%17,8991.00
2025-12-316,160-22.3%15,2121.00
2025-12-157,931+9.9%17,9821.00
2025-11-287,215+124.5%25,8521.00
2025-11-143,214+2.4%43,9941.00
2025-10-313,140-26.0%35,3301.00
2025-10-154,243+40.1%13,0441.00
2025-09-303,029-59.0%6,5031.00
2025-09-157,380-50.7%5,9091.25
2025-08-2914,958-46.2%5,7752.59
2025-08-1527,814+9.1%2,60610.67
2025-07-3125,488-5.2%3,6956.90
2025-07-1526,884+22.8%4,7565.65
2025-06-3021,899-2.6%6,1413.57
2025-06-1322,482+68.8%2,23810.05
2025-05-3013,323+76.0%4,8632.74
2025-05-157,569+10.7%12,9941.00
2025-04-306,838+64.7%29,8051.00
2025-04-154,151+13.7%11,8631.00
2025-03-313,652-18.7%10,8291.00
2025-03-144,492+70.1%10,8781.00
2025-02-282,641-24.4%2,4431.08
2025-02-143,495-5.5%6,5571.00
2025-01-313,699+6.1%4,4451.00
2025-01-153,486-23.6%5,2391.00
2024-12-314,563-7.0%8,7631.00
2024-12-134,904-50.4%7,5211.00
2024-11-299,880+1.6%12,4611.00
2024-11-159,724+18.4%7,9201.23
2024-10-318,215+76.9%9,0911.00
2024-10-154,644-70.6%23,6171.00

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 23 October 2026, the short share of NAII volume is 1.6%, down 5.3 points over the last five sessions. Over the last 30 readings it ranged from 0.7% (22 October 2026) to 78.3% (14 September 2026). The latest reading sits at the bottom of that range. The latest reading is 19.8 points below the 30-session average of 21.4%, on 2K shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-10-23392K1.6%0
2026-10-228812K0.7%0
2026-10-21151K1.2%0
2026-10-2011K22K49.6%0
2026-10-198335K16.4%0
2026-10-161K18K6.8%0
2026-10-151824K4.1%0
2026-10-142K21K9.8%0
2026-10-1346817K2.7%0
2026-10-125K35K15.2%0
2026-10-096K46K12.9%0
2026-10-085K32K16.7%0
2026-10-073K12K26.7%0
2026-10-0621815K1.5%0
2026-10-052277K3.5%0
2026-10-021K24K5.9%900
2026-10-0195510K9.8%0
2026-09-307K29K22.8%2,920
2026-09-2921K55K38.9%6,076
2026-09-281K3K46.9%0
2026-09-251183K3.6%0
2026-09-242615K4.8%0
2026-09-237K13K52.7%0
2026-09-221K3K54.2%0
2026-09-2170811K6.6%0
2026-09-184913K14.8%0
2026-09-172K12K13.0%0
2026-09-165K9K56.3%0
2026-09-1549677264.3%0
2026-09-1412K15K78.3%0

Fails to deliver

SEC, the last 30 settlement dates with a fail. JSON

As of 24 September 2026, the fails-to-deliver balance in NAII is 2,234 shares, up 1,605 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (5 March 2026) to 12,240 shares (14 November 2025).

SettlementShares failedPriceValue
2026-09-242,234$1.85$4K
2026-09-22629$1.87$1K
2026-09-162$1.97$4
2026-09-0916$1.98$32
2026-08-28114$2.29$261
2026-08-24102$2.15$219
2026-08-138,123$2.10$17K
2026-08-128,192$2.18$18K
2026-08-044$2.27$9
2026-07-2056$2.22$124
2026-07-0939$2.28$89
2026-03-31112$2.62$293
2026-03-17150$2.65$398
2026-03-103,301$2.81$9K
2026-03-051$2.77$3
2026-02-19935$2.60$2K
2026-02-182,113$2.56$5K
2026-01-14100$4.61$461
2026-01-08233$3.93$916
2026-01-025,904$3.58$21K
2025-12-12281$3.24$910
2025-11-2136$3.10$112
2025-11-19339$3.06$1K
2025-11-1412,240$3.33$41K
2025-11-07453$2.88$1K
2025-10-301,039$2.81$3K
2025-10-292,670$2.84$8K
2025-09-29178$2.88$513
2025-08-212,885$4.00$12K
2025-08-1456$3.78$212

Insider trades

SEC Form 4, newest first. JSON

No open-market insider trades were reported for NAII in the last 90 days. The most recent filings are listed below. Latest filing: LEDOUX MARK A (CEO/Chairman) on 2026-03-06.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-03-06LEDOUX MARK ACEO/ChairmanBuy532$2.80$1K160K
2026-03-06WOLF KENNETHPresident, COO, & Sec.Grant15K$0.00$0142K
2026-03-06WOLF KENNETHPresident, COO, & Sec.Tax withholding5K$2.73$14K127K
2026-03-06Ramanathan GuruDirectorGrant8K$0.00$038K
2026-03-06Matherly Laura KayDirectorGrant8K$0.00$042K
2026-03-06LEDOUX MARK ACEO/ChairmanGrant20K$0.00$0177K
2026-03-06LEDOUX MARK ACEO/ChairmanTax withholding3K$2.73$10K157K
2026-03-06Fortin Michael EChief Financial OfficerGrant12K$0.00$059K
2026-03-06Fortin Michael EChief Financial OfficerTax withholding4K$2.73$12K47K
2026-03-06Dunn Alan GDirectorGrant8K$0.00$099K
2026-03-05LEDOUX MARK ACEO/ChairmanBuy218$2.75$600160K
2026-03-04LEDOUX MARK ACEO/ChairmanBuy500$2.77$1K159K
2026-03-02LEDOUX MARK ACEO/ChairmanBuy500$2.79$1K159K
2026-02-27LEDOUX MARK ACEO/ChairmanBuy250$2.80$700158K
2026-02-27LEDOUX MARK ACEO/ChairmanBuy500$2.85$1K158K
2026-02-26LEDOUX MARK ACEO/ChairmanBuy500$2.85$1K158K
2026-02-25LEDOUX MARK ACEO/ChairmanBuy500$2.81$1K157K
2026-02-24LEDOUX MARK ACEO/ChairmanBuy1K$2.71$3K157K
2026-02-23LEDOUX MARK ACEO/ChairmanBuy750$2.70$2K156K
2026-02-20LEDOUX MARK ACEO/ChairmanBuy250$2.65$664155K
2026-02-19LEDOUX MARK ACEO/ChairmanBuy2K$2.56$4K155K
2026-02-18LEDOUX MARK ACEO/ChairmanBuy500$2.56$1K153K
2026-02-17LEDOUX MARK ACEO/ChairmanBuy3K$2.60$6K153K
2025-12-23LEDOUX MARK ACEO/ChairmanGift10Kprice not stated in the filingnot stated150K
2025-03-07LEDOUX MARK ACEO/ChairmanTax withholding6K$3.84$23K160K
2025-03-07Fortin Michael EChief Financial OfficerTax withholding6K$3.84$24K51K
2025-03-07WOLF KENNETHPresident, COO, & Sec.Tax withholding8K$3.84$29K132K
2025-03-07Matherly Laura KayDirectorGrant8K$0.00$034K
2025-03-07Ramanathan GuruDirectorGrant8K$0.00$030K
2025-03-07Dunn Alan GDirectorGrant8K$0.00$091K
2024-03-08Fortin Michael EChief Financial OfficerGrant12K$0.00$057K
2024-03-08WOLF KENNETHPresident, COO, & Sec.Grant15K$0.00$0140K
2024-03-08LEDOUX MARK ACEO/ChairmanGrant17K$0.00$0166K
2024-03-08Ramanathan GuruDirectorGrant8K$0.00$022K
2024-03-08Matherly Laura KayDirectorGrant8K$0.00$026K
2024-03-08Dunn Alan GDirectorGrant8K$0.00$083K
2024-03-07Fortin Michael EChief Financial OfficerTax withholding5K$5.95$32K45K
2024-03-07WOLF KENNETHPresident, COO, & Sec.Tax withholding7K$5.95$39K125K
2024-03-07LEDOUX MARK ACEO/ChairmanTax withholding6K$5.95$34K149K
2023-12-15LEDOUX MARK ACEO/ChairmanGift8Kprice not stated in the filingnot stated155K
2023-03-07Ramanathan GuruDirectorGrant7K$0.00$014K
2023-03-07Dunn Alan GDirectorGrant7K$0.00$075K
2023-03-07Matherly Laura KayDirectorGrant7K$0.00$018K
2023-03-07LEDOUX MARK ACEO/ChairmanGrant15K$0.00$0166K
2023-03-07LEDOUX MARK ACEO/ChairmanTax withholding3K$8.86$28K162K
2023-03-07Fortin Michael EChief Financial OfficerTax withholding3K$8.86$29K51K
2023-03-07Fortin Michael EChief Financial OfficerGrant11K$0.00$054K
2023-03-07WOLF KENNETHPresident, COO, & Sec.Grant13K$0.00$0135K
2023-03-07WOLF KENNETHPresident, COO, & Sec.Tax withholding3K$8.86$27K132K
2022-11-01LEDOUX MARK ACEO/ChairmanGift8Kprice not stated in the filingnot stated151K
2022-08-16LEDOUX MARK ACEO/ChairmanGift8Kprice not stated in the filingnot stated158K
2022-03-07LEDOUX MARK ACEO/ChairmanTax withholding3K$11.00$34K166K
2022-03-07WOLF KENNETHPresident, COO, & Sec.Tax withholding5K$11.00$56K122K
2022-03-07Fortin Michael EChief Financial OfficerTax withholding4K$11.00$43K43K
2022-03-04Ramanathan GuruDirectorGrant7K$0.00$07K
2022-03-04LEDOUX MARK ACEO/ChairmanGrant15Kprice not stated in the filingnot stated169K
2022-03-04Matherly Laura KayDirectorGrant7K$0.00$011K
2022-03-04WOLF KENNETHPresident, COO, & Sec.Grant13K$0.00$0127K
2022-03-04Dunn Alan GDirectorGrant7K$0.00$068K
2021-12-23LEDOUX MARK ACEO/ChairmanGift5Kprice not stated in the filingnot stated154K
2021-09-01LEDOUX MARK ACEO/ChairmanSell3K$16.22$41K159K
2021-09-01LEDOUX MARK ACEO/ChairmanSell3K$16.21$41K482K
2021-08-30LEDOUX MARK ACEO/ChairmanSell3K$15.65$39K484K
2021-08-30LEDOUX MARK ACEO/ChairmanSell3K$15.68$39K161K
2021-08-03LEDOUX MARK ACEO/ChairmanSell5K$17.44$84K487K
2021-08-03LEDOUX MARK ACEO/ChairmanSell5K$17.44$82K164K
2021-08-02LEDOUX MARK ACEO/ChairmanSell5K$17.37$90K492K
2021-08-02LEDOUX MARK ACEO/ChairmanSell5K$17.36$92K168K
2021-07-14LEDOUX MARK ACEO/ChairmanSell5K$17.44$87K501K
2021-07-14LEDOUX MARK ACEO/ChairmanSell5K$17.43$87K16K
2021-07-12LEDOUX MARK ACEO/ChairmanSell5K$17.46$87K506K
2021-07-12LEDOUX MARK ACEO/ChairmanSell5K$17.50$88K21K
2021-07-02LEDOUX MARK ACEO/ChairmanSell3K$17.40$52K26K
2021-07-02LEDOUX MARK ACEO/ChairmanSell3K$17.41$54K511K
2021-06-30LEDOUX MARK ACEO/ChairmanSell5K$16.01$80K514K
2021-06-30LEDOUX MARK ACEO/ChairmanSell5K$15.94$80K29K
2021-05-18WELDON LEE GDirectorExercise or conversion10K$3.52$35K98K
2021-05-18DAVIS JOE EDirectorExercise or conversion10K$3.52$35K119K
2021-05-18DAVIS JOE EDirectorSell2K$14.61$35K117K
2021-04-20WELDON LEE GDirectorSell10K$16.22$162K10K
2021-04-19LEDOUX MARK ACEO/ChairmanSell5K$17.58$88K34K
2021-04-19LEDOUX MARK ACEO/ChairmanSell5K$17.58$88K519K
2021-04-05LEDOUX MARK ACEO/ChairmanSell3K$16.20$41K520K
2021-04-05LEDOUX MARK ACEO/ChairmanSell3K$16.20$41K35K
2021-04-01LEDOUX MARK ACEO/ChairmanSell2K$15.50$25K38K
2021-04-01LEDOUX MARK ACEO/ChairmanSell2K$15.50$23K523K
2021-03-31LEDOUX MARK ACEO/ChairmanSell898$15.50$14K39K
2021-03-31LEDOUX MARK ACEO/ChairmanSell1K$15.50$16K524K
2021-03-16Dunn Alan GDirectorExercise or conversion10K$3.52$35K63K
2021-03-16Dunn Alan GDirectorSell2K$16.63$35K61K
2021-03-15Matherly Laura KayDirectorGrant4K$0.00$04K
2021-03-15Dunn Alan GDirectorGrant4K$0.00$053K
2021-03-15WOLF KENNETHPresident, COO, & Sec.Grant9K$0.00$0114K
2021-03-15WELDON LEE GDirectorGrant4K$0.00$088K
2021-03-15Fortin Michael EChief Financial OfficerGrant7K$0.00$036K
2021-03-15DAVIS JOE EDirectorGrant4K$0.00$0109K
2021-03-15LANE ALAN JDirectorGrant4K$0.00$038K
2021-03-15LEDOUX MARK ACEO/ChairmanGrant11K$0.00$040K
2021-03-12Fortin Michael EChief Financial OfficerSell5K$16.45$83K29K
2021-03-11Fortin Michael EChief Financial OfficerSell9K$16.26$150K34K

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. JSON

1 holder reports 5% or more of NAII in its latest filing, on Schedule 13G (passive). The holder is Dimensional Fund Advisors LP at 6.2% of the class (384,497 shares), filed 2026-01-21 for an event on 2025-12-31.

FiledFormHolderSharesOf classEvent
2026-01-2113G/Ano. 12Dimensional Fund Advisors LPinvestment adviser384K6.2%2025-12-31

13F holders

Tracked managers holding NAII at their latest 13F. JSON

2 of the 30 tracked managers held NAII at their latest 13F, $844K in total at quarter-end prices. Renaissance Technologies is the largest at $663K (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 1 added shares and 1 cut.

FundQuarterSharesValueOf portfolioChange in shares
Renaissance Technologies2026-06-30277K$663K0.00%-14K
Citadel Advisors2026-06-3076K$181K0.00%+32K

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

Natural Alternatives International 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 Natural Alternatives International (NAII), SEC CIK 787253, listed on Nasdaq, classified by the SEC as medicinal chemicals & botanical products. 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 2026-09-30.JSON and CSV
Daily short volume
FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-23.JSON and CSV
Fails to deliver
SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-24.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 2026-01-21.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
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 2026-03-06.JSON and CSV
Company record
EDGAR filing index for CIK 787253Ticker, 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 medicinal chemicals & botanical products

Other company pages

Datasets

Frequently Asked Questions

How much of NAII is sold short?
6,864 shares were held short at the 2026-09-30 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 NAII's daily short volume?
On 2026-10-23, 39 of the 2,477 NAII shares reported to FINRA were sold short, 1.6% of the day's reported volume. Short volume is a flow for one day, not a position.
Does NAII have fails to deliver?
The SEC's latest file shows 2,234 NAII shares failed to deliver at settlement 2026-09-24. Fails are reported per settlement date and published twice a month with a lag.
Are NAII insiders buying or selling?
No open-market insider trades were reported for NAII in the last 90 days. The most recent filings are listed below. Latest filing: LEDOUX MARK A (CEO/Chairman) on 2026-03-06.
Who owns 5% or more of NAII?
1 holder reports 5% or more of NAII in its latest filing, on Schedule 13G (passive). The holder is Dimensional Fund Advisors LP at 6.2% of the class (384,497 shares), filed 2026-01-21 for an event on 2025-12-31.
Which tracked 13F managers own NAII?
2 of the 30 tracked 13F managers held NAII shares at their latest filing, $844K in all. The largest: Renaissance Technologies (277K shares, $663K), Ken Griffin's Citadel Advisors (76K shares, $181K).

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