Ticker · CUSIP 637215104

NPK

NATIONAL PRESTO INDS INC

Industrials·Aerospace & Defense

···Share

Holders (tracked)

Combined shares

358,708

Combined value

$38.30M

Last close

$143.72

Quarter

2025Q4

Price is +34.6% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$143.72+61.09 (+73.92%)H $144.44 · L $80.47 · Avg Vol 76K

Tracked holders · last 8 quarters

Flat over the last 8 quarters.

SEC event timeline

15 events

Izzy Englander (Millennium Mgmt) added2026-02-17
+3,405 shares · 2025Q4
Position
Two Sigma Investments trimmed2026-02-17
−17,418 shares · 2025Q4
Position
Ken Griffin (Citadel Advisors) added2026-02-17
+7,974 shares · 2025Q4
Position
T. Rowe Price added2026-02-17
+355 shares · 2025Q4
Position
AQR Capital Management added2026-02-17
+367 shares · 2025Q4
Position
Renaissance Technologies trimmed2026-02-12
−20,200 shares · 2025Q4
Position
Mario Gabelli (GAMCO) added2026-02-05
+520 shares · 2025Q4
Position
AQR Capital Management trimmed2025-11-14
−3,840 shares · 2025Q3
Position
Izzy Englander (Millennium Mgmt) opened position2025-11-14
+51,336 shares · 2025Q3
Position
Two Sigma Investments added2025-11-14
+14,831 shares · 2025Q3
Position
D.E. Shaw & Co. exited2025-11-14
−6,052 shares · 2025Q3
Position
T. Rowe Price added2025-11-14
+123 shares · 2025Q3
Position
Renaissance Technologies trimmed2025-11-13
−16,200 shares · 2025Q3
Position
Norges Bank (Norway SWF) exited2025-11-13
−9,600 shares · 2025Q3
Position
Mario Gabelli (GAMCO) trimmed2025-11-12
−5,053 shares · 2025Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for NPK →

Follow-the-investor returns

If you'd copied each holder of NPK…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
AQR Capital Management	2016Q1	$76.14	+88.8%	$704K
Mario Gabelli (GAMCO)	2016Q4	$76.49	+87.9%	$13.8M
T. Rowe Price	2016Q4	$87.63	+64.0%	$794K
Renaissance Technologies	2016Q1	$89.88	+59.9%	$23.4M
Ken Griffin (Citadel Advisors)	2016Q1	$95.60	+50.3%	$3.9M
Two Sigma Investments	2016Q3	$100.79	+42.6%	$1.1M
Izzy Englander (Millennium Mgmt)	2016Q1	$108.46	+32.5%	$7.9M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions0

—

Added to5

Ken Griffin (Citadel Advisors)
+7,974
$851K
Izzy Englander (Millennium Mgmt)
+3,405
$364K
Mario Gabelli (GAMCO)
+520
$56K
AQR Capital Management
+367
$39K
T. Rowe Price
+355
$38

Trimmed2

Renaissance Technologies
−20,200
$2.2M
Two Sigma Investments
−17,418
$1.9M

Exited0

—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	8	1,173,599	$1.69B	—
2022Q2	7	1,219,205	$1.21B	-1
2022Q3	7	1,193,548	$77.6M	—
2022Q4	8	1,212,158	$83.0M	+1
2023Q1	6	1,204,368	$86.8M	-2
2023Q2	8	1,233,314	$90.3M	+2
2023Q3	7	1,215,072	$88.0M	-1
2023Q4	8	1,235,899	$99.2M	+1
2024Q1	8	1,249,889	$104.7M	—
2024Q2	9	1,369,806	$102.9M	+1
2024Q3	9	498,349	$37.4M	—
2024Q4	9	421,898	$41.5M	—
2025Q1	8	380,690	$33.5M	-1
2025Q2	8	350,669	$34.4M	—
2025Q3	7	383,705	$43.0M	-1
2025Q4	7	358,708	$38.3M	—

Who owns NPK

7 super-investors · 2025Q4

Tracked stake

358.7K

Combined value

$38M

% of shares outstanding

—

shares-out unknown

Quarter action mix

Added5Trim2

#	Manager	Shares	Value	% of book	Last action
1	Renaissance Technologies	162.8K	$17M	0.0%	Trim−20.2K
2	Mario Gabelli GAMCO	95.8K	$10M	0.1%	Added+520
3	Izzy Englander Millennium Mgmt	54.7K	$6M	0.0%	Added+3.4K
4	Ken Griffin Citadel Advisors	27.0K	$3M	0.0%	Added+8.0K
5	Two Sigma Investments	7.9K	$843K	0.0%	Trim−17.4K
6	T. Rowe Price	5.5K	$590K	0.0%	Added+355
7	AQR Capital Management	4.9K	$523K	0.0%	Added+367

Recent moves

20 transactions

ADDKen Griffin (Citadel Advisors)
+7,974 · 2025Q4
TRIMTwo Sigma Investments
−17,418 · 2025Q4
ADDIzzy Englander (Millennium Mgmt)
+3,405 · 2025Q4
ADDT. Rowe Price
+355 · 2025Q4
ADDAQR Capital Management
+367 · 2025Q4
TRIMRenaissance Technologies
−20,200 · 2025Q4
ADDMario Gabelli (GAMCO)
+520 · 2025Q4
TRIMAQR Capital Management
−3,840 · 2025Q3
ADDT. Rowe Price
+123 · 2025Q3
ADDTwo Sigma Investments
+14,831 · 2025Q3
NEWIzzy Englander (Millennium Mgmt)
+51,336 · 2025Q3
SOLDD.E. Shaw & Co.
−6,052 · 2025Q3
SOLDNorges Bank (Norway SWF)
−9,600 · 2025Q3
TRIMRenaissance Technologies
−16,200 · 2025Q3
TRIMMario Gabelli (GAMCO)
−5,053 · 2025Q3
ADDT. Rowe Price
+429 · 2025Q2
SOLDIzzy Englander (Millennium Mgmt)
−5,072 · 2025Q2
TRIMTwo Sigma Investments
−14,254 · 2025Q2
TRIMD.E. Shaw & Co.
−4,905 · 2025Q2
TRIMAQR Capital Management
−10,982 · 2025Q2

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