Pioneer Power Solutions (PPSI)

Pioneer Power Solutions on one page: short interest, daily short volume, fails to deliver, 13F holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as miscellaneous electrical machinery, equipment & supplies.

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51K

Short interest

settlement 2026-10-15

1.0

Days to cover

unchanged vs prior

22.5%

Short share of volume

2026-11-02

102

Fails to deliver

settlement 2026-09-16

Thu 12 Nov

Next earnings

estimated date

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. JSON

As of 15 October 2026, short interest in PPSI is 51,494 shares, down 58,588 shares over the last month. Over the last 48 readings it ranged from 15,532 shares (31 July 2025) to 206,047 shares (29 August 2025). At the reported average volume of 75K shares a day that is 1.0 days to cover.

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Settlement	Shares short	Change	Avg daily volume	Days to cover
2026-10-15	51,494	+1.1%	75,428	1.00
2026-09-30	50,940	-53.7%	114,472	1.00
2026-09-15	110,082	+27.6%	101,771	1.08
2026-08-31	86,261	+102.7%	141,283	1.00
2026-08-14	42,563	-8.7%	76,155	1.00
2026-07-31	46,612	-2.3%	52,657	1.00
2026-07-15	47,687	-5.9%	76,582	1.00
2026-06-30	50,673	-11.7%	98,427	1.00
2026-06-15	57,381	-17.7%	207,578	1.00
2026-05-29	69,686	+29.8%	403,782	1.00
2026-05-15	53,674	-64.4%	288,989	1.00
2026-04-30	150,861	+79.8%	269,264	1.00
2026-04-15	83,890	+12.4%	161,915	1.00
2026-03-31	74,665	+75.1%	74,477	1.00
2026-03-13	42,648	-12.6%	72,635	1.00
2026-02-27	48,784	+43.8%	82,468	1.00
2026-02-13	33,928	+20.3%	113,589	1.00
2026-01-30	28,193	-35.6%	184,600	1.00
2026-01-15	43,757	-2.1%	166,888	1.00
2025-12-31	44,691	-0.9%	204,532	1.00
2025-12-15	45,084	-12.3%	61,443	1.00
2025-11-28	51,425	-6.3%	60,706	1.00
2025-11-14	54,892	-24.3%	102,983	1.00
2025-10-31	72,461	-12.4%	110,144	1.00
2025-10-15	82,724	-24.3%	140,438	1.00
2025-09-30	109,210	-39.9%	116,690	1.00
2025-09-15	181,671	-11.8%	235,262	1.00
2025-08-29	206,047	+26.9%	456,882	1.00
2025-08-15	162,417	+945.7%	8,946,708	1.00
2025-07-31	15,532	-27.1%	93,815	1.00
2025-07-15	21,304	-47.2%	33,563	1.00
2025-06-30	40,316	+9.1%	44,470	1.00
2025-06-13	36,942	-2.9%	29,672	1.25
2025-05-30	38,050	-33.5%	47,867	1.00
2025-05-15	57,187	+47.0%	62,359	1.00
2025-04-30	38,890	-28.6%	48,004	1.00
2025-04-15	54,429	-19.2%	81,184	1.00
2025-03-31	67,392	-31.9%	31,139	2.16
2025-03-14	98,977	+22.1%	61,945	1.60
2025-02-28	81,096	-9.9%	59,763	1.36
2025-02-14	90,051	-15.5%	63,658	1.41
2025-01-31	106,626	+37.6%	45,884	2.32
2025-01-15	77,487	-19.5%	77,675	1.00
2024-12-31	96,226	-12.3%	147,918	1.00
2024-12-13	109,739	+24.8%	134,373	1.00
2024-11-29	87,909	-34.1%	124,008	1.00
2024-11-15	133,375	-31.3%	182,358	1.00
2024-10-31	194,232	+27.1%	141,372	1.37

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 2 November 2026, the short share of PPSI volume is 22.5%, down 31.4 points over the last five sessions. Over the last 30 readings it ranged from 3.5% (20 October 2026) to 60.4% (8 October 2026). The latest reading is 8.3 points below the 30-session average of 30.9%, on 15K shares reported.

Date	Short volume	Total volume	Short share	Exempt
2026-11-02	3K	15K	22.5%	0
2026-10-30	8K	21K	38.3%	5,158
2026-10-29	2K	13K	14.6%	0
2026-10-28	2K	9K	17.5%	0
2026-10-27	1K	8K	18.0%	0
2026-10-26	10K	19K	53.9%	0
2026-10-23	10K	25K	41.8%	1,566
2026-10-22	30K	94K	32.5%	637
2026-10-21	6K	46K	14.2%	0
2026-10-20	747	21K	3.5%	0
2026-10-19	720	7K	10.4%	0
2026-10-16	8K	18K	46.4%	0
2026-10-15	6K	25K	25.2%	0
2026-10-14	10K	28K	37.6%	0
2026-10-13	13K	25K	51.1%	0
2026-10-12	6K	21K	28.7%	0
2026-10-09	16K	56K	29.2%	0
2026-10-08	22K	36K	60.4%	0
2026-10-07	6K	37K	16.4%	0
2026-10-06	50K	103K	48.9%	0
2026-10-05	7K	19K	36.2%	0
2026-10-02	31K	110K	28.5%	0
2026-10-01	11K	27K	39.8%	0
2026-09-30	7K	24K	27.8%	0
2026-09-29	7K	18K	41.2%	0
2026-09-28	12K	58K	20.5%	0
2026-09-25	16K	50K	32.8%	0
2026-09-24	21K	76K	27.9%	0
2026-09-23	16K	52K	31.2%	1,000
2026-09-22	10K	34K	28.6%	0

Fails to deliver

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

As of 16 September 2026, the fails-to-deliver balance in PPSI is 102 shares, down 844 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (16 September 2025) to 23,176 shares (29 April 2026). The latest reading sits at the bottom of that range.

Settlement	Shares failed	Price	Value
2026-09-16	102	$3.02	$308
2026-09-10	946	$3.14	$3K
2026-07-20	263	$3.24	$852
2026-06-11	68	$4.12	$280
2026-05-06	515	$4.25	$2K
2026-04-29	23,176	$3.81	$88K
2026-04-02	124	$3.39	$420
2025-12-30	30	$4.57	$137
2025-12-29	3,150	$4.63	$15K
2025-11-13	393	$4.20	$2K
2025-11-05	84	$4.27	$359
2025-11-03	108	$4.60	$497
2025-10-31	729	$4.47	$3K
2025-10-30	4,319	$4.41	$19K
2025-10-29	372	$4.51	$2K
2025-10-23	3	$4.31	$13
2025-10-21	2,200	$4.57	$10K
2025-10-20	169	$4.38	$740
2025-10-17	14	$4.74	$66
2025-10-15	2,943	$4.96	$15K
2025-10-14	8,473	$4.79	$41K
2025-10-09	1,765	$4.46	$8K
2025-10-03	2,594	$4.31	$11K
2025-10-02	6,521	$4.38	$29K
2025-09-29	2,726	$4.33	$12K
2025-09-25	1,536	$4.39	$7K
2025-09-23	213	$4.46	$950
2025-09-22	447	$4.45	$2K
2025-09-18	2,460	$4.50	$11K
2025-09-16	1	$4.57	$5

Insider trades

SEC Form 4, newest first. JSON

No open-market insider trades were reported for PPSI in the last 90 days. The most recent filings are listed below. Latest filing: MAZUREK NATHAN (Chief Executive Officer) on 2026-03-02.

Date	Insider	Title	Type	Shares	Price	Value	Owned after
2026-03-02	MAZUREK NATHAN	Chief Executive Officer	Exercise or conversion	1K	$2.18	$2K	2.0M
2025-11-18	MAZUREK NATHAN	Chief Executive Officer	Buy	10K	$3.39	$34K	2.0M
2025-05-02	Michalec Wojciech	Chief Financial Officer	Tax withholding	25K	$5.92	$148K	275K
2024-12-20	Michalec Wojciech	Chief Financial Officer	Sell	13K	$4.09	$53K	300K
2024-12-19	Michalec Wojciech	Chief Financial Officer	Sell	2K	$4.12	$8K	313K
2024-12-05	Cohn Yossi	Director	Exercise or conversion	10K	$1.68	$17K	12K
2024-12-05	Michalec Wojciech	Chief Financial Officer	Grant	50K	price not stated in the filing	not stated	315K
2024-12-05	Cohn Yossi	Director	Exercise or conversion	2K	$3.17	$5K	24K
2024-12-05	Cohn Yossi	Director	Exercise or conversion	1K	$3.68	$4K	2K
2024-12-05	Cohn Yossi	Director	Exercise or conversion	10K	$3.31	$33K	22K
2024-12-04	Ross Ian	Director	Sell	1K	$6.01	$6K	23K
2024-11-15	Ross Ian	Director	Exercise or conversion	10K	$3.31	$33K	22K
2024-11-15	Ross Ian	Director	Exercise or conversion	2K	$3.17	$5K	24K
2024-11-15	Ross Ian	Director	Exercise or conversion	10K	$1.68	$17K	12K
2024-11-15	Ross Ian	Director	Exercise or conversion	1K	$3.68	$4K	2K
2024-10-22	Tulkoff Jonathan	Director	Exercise or conversion	10K	$3.31	$33K	33K
2024-10-22	Tulkoff Jonathan	Director	Exercise or conversion	10K	$1.68	$17K	23K
2024-10-22	Tulkoff Jonathan	Director	Exercise or conversion	1K	$3.68	$4K	12K
2024-10-22	Tulkoff Jonathan	Director	Exercise or conversion	1K	$5.60	$6K	13K
2024-10-22	Tulkoff Jonathan	Director	Exercise or conversion	2K	$3.17	$5K	35K
2024-10-22	Tulkoff Jonathan	Director	Exercise or conversion	10K	$5.25	$53K	45K
2024-10-22	Michalec Wojciech	Chief Financial Officer	Tax withholding	483	$6.15	$3K	265K
2024-10-22	Michalec Wojciech	Chief Financial Officer	Exercise or conversion	3K	$3.17	$10K	265K
2024-10-22	Michalec Wojciech	Chief Financial Officer	Tax withholding	2K	$6.15	$11K	262K
2024-10-22	Michalec Wojciech	Chief Financial Officer	Exercise or conversion	12K	$3.31	$40K	264K
2024-10-22	Michalec Wojciech	Chief Financial Officer	Exercise or conversion	10K	$1.68	$17K	255K
2024-10-22	Michalec Wojciech	Chief Financial Officer	Tax withholding	2K	$6.15	$15K	252K
2024-10-18	Klink Thomas	Director	Exercise or conversion	10K	$3.31	$33K	126K
2024-10-18	Klink Thomas	Director	Exercise or conversion	1K	$5.60	$6K	116K
2024-10-18	Klink Thomas	Director	Exercise or conversion	1K	$3.68	$4K	115K
2024-10-18	Klink Thomas	Director	Exercise or conversion	2K	$3.17	$5K	128K
2024-10-18	Klink Thomas	Director	Exercise or conversion	10K	$5.25	$53K	138K
2024-06-07	Michalec Wojciech	Chief Financial Officer	Tax withholding	58K	$3.88	$223K	245K
2023-09-20	Michalec Wojciech	Chief Financial Officer	Tax withholding	73K	$6.15	$447K	177K
2023-09-20	MAZUREK NATHAN	Chief Executive Officer	Tax withholding	44K	$6.15	$273K	2.0M
2023-09-12	MAZUREK NATHAN	Chief Executive Officer	Buy	10K	$6.09	$61K	2.0M
2023-05-16	MAZUREK NATHAN	Chief Executive Officer	Grant	100K	price not stated in the filing	not stated	2.0M
2022-12-13	MAZUREK NATHAN	Chief Executive Officer	Buy	10K	$2.73	$27K	1.9M
2022-06-13	MAZUREK NATHAN	Chief Executive Officer	Buy	3K	$3.34	$8K	1.9M
2022-04-25	Michalec Wojciech	Chief Financial Officer	Grant	375K	price not stated in the filing	not stated	375K
2022-04-11	MAZUREK NATHAN	Chief Executive Officer	Other transaction	1.9M	$0.00	$0	1.9M
2022-03-18	Tulkoff Jonathan	Director	Exercise or conversion	1K	$4.11	$4K	11K
2022-03-16	MAZUREK NATHAN	Chief Executive Officer	Exercise or conversion	1K	$4.11	$4K	38K
2022-03-15	Cohn Yossi	Director	Exercise or conversion	1K	$4.11	$4K	1K
2022-02-24	Ross Ian	Director	Exercise or conversion	1K	$4.11	$4K	1K
2021-12-01	Tesler David	Director	Exercise or conversion	1K	$3.68	$4K	5K
2021-12-01	Tesler David	Director	Exercise or conversion	10K	$1.68	$17K	15K
2021-12-01	Tesler David	Director	Exercise or conversion	1K	$4.11	$4K	16K
2021-11-21	Klink Thomas	Director	Exercise or conversion	3K	$4.11	$12K	104K
2021-11-21	Klink Thomas	Director	Exercise or conversion	1K	$4.11	$4K	101K
2021-11-21	Klink Thomas	Director	Exercise or conversion	10K	$1.68	$17K	114K
2021-08-18	MAZUREK NATHAN	Chief Executive Officer	Buy	5K	$3.56	$18K	37K
2021-06-02	MAZUREK NATHAN	Chief Executive Officer	Buy	1K	$4.24	$4K	32K
2020-08-24	MAZUREK NATHAN	Chief Executive Officer	Buy	1K	$1.40	$1K	31K
2020-08-20	MAZUREK NATHAN	Chief Executive Officer	Buy	1K	$1.47	$1K	30K
2020-06-18	MAZUREK NATHAN	Chief Executive Officer	Buy	4K	$1.35	$5K	29K
2020-06-09	MAZUREK NATHAN	Chief Executive Officer	Buy	1K	$1.25	$1K	25K
2020-06-02	MAZUREK NATHAN	Chief Executive Officer	Buy	4K	$1.00	$4K	24K
2020-06-01	MAZUREK NATHAN	Chief Executive Officer	Buy	807	$0.99	$799	20K
2020-05-22	MAZUREK NATHAN	Chief Executive Officer	Buy	241	$1.04	$251	18K
2020-05-22	MAZUREK NATHAN	Chief Executive Officer	Buy	359	$1.03	$370	19K
2020-05-22	MAZUREK NATHAN	Chief Executive Officer	Buy	400	$1.04	$416	19K
2020-05-19	MAZUREK NATHAN	Chief Executive Officer	Buy	5K	$1.09	$5K	18K
2020-05-19	MAZUREK NATHAN	Chief Executive Officer	Buy	80	$1.05	$84	13K

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.

13F holders

Tracked managers holding PPSI at their latest 13F. JSON

2 of the 30 tracked managers held PPSI at their latest 13F, $777K in total at quarter-end prices. Renaissance Technologies is the largest at $498K (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 0 cut.

Fund	Quarter	Shares	Value	Of portfolio	Change in shares
Renaissance Technologies	2026-06-30	126K	$498K	0.00%	+62K
Citadel Advisors	2026-06-30	71K	$279K	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

Pioneer Power Solutions 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 Pioneer Power Solutions (PPSI), SEC CIK 1449792, listed on Nasdaq, classified by the SEC as miscellaneous electrical machinery, equipment & supplies. 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 2026-09-16.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 2026-08-17.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 2026-03-02.JSON and CSV
Company record: EDGAR filing index for CIK 1449792Ticker, 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 miscellaneous electrical machinery, equipment & supplies

Other company pages

Datasets

Frequently Asked Questions

How much of PPSI is sold short?

51,494 shares were held short at the 2026-10-15 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 PPSI's daily short volume?

On 2026-11-02, 3,397 of the 15,090 PPSI shares reported to FINRA were sold short, 22.5% of the day's reported volume. Short volume is a flow for one day, not a position.

Does PPSI have fails to deliver?

The SEC's latest file shows 102 PPSI shares failed to deliver at settlement 2026-09-16. Fails are reported per settlement date and published twice a month with a lag.

Are PPSI insiders buying or selling?

No open-market insider trades were reported for PPSI in the last 90 days. The most recent filings are listed below. Latest filing: MAZUREK NATHAN (Chief Executive Officer) on 2026-03-02.

Which tracked 13F managers own PPSI?

2 of the 30 tracked 13F managers held PPSI shares at their latest filing, $777K in all. The largest: Renaissance Technologies (126K shares, $498K), Ken Griffin's Citadel Advisors (71K shares, $279K).

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