Vault-13

NPK INTERNATIONAL INC NPKI

COM SHS · Common Stock · CUSIP 651718504

128 institutional holders +8 vs Q1 2023
57,677,90657.7m shares reported held*
66.4% of all shares outstanding*
$301.7mreported value*
22 new 40 added 48 reduced 15 sold out net bought ≈ $3.6m (+718.4k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($2.7m this quarter). Holder counts are more reliable. Shares outstanding: 86.8m as of 2023-07-31, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $5.23. Options: 4 managers hold calls ($619.5k notional), 2 hold puts ($2.1k).

Trends to Q2 2023

Institutional holders

Managers reporting a position, each quarter

050100150Q3 22: 115Q4 22: 120Q1 23: 120Q2 23: 128128Q3 22Q4 22Q1 23Q2 23
Numbers
QuarterHolders
Q3 2022115
Q4 2022120
Q1 2023120
Q2 2023128

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
1000100Q4 22: 55 bought or addedQ4 22: 53 cut or sold outQ4 22Q1 23: 57 bought or addedQ1 23: 64 cut or sold outQ1 23Q2 23: 62 bought or addedQ2 23: 63 cut or sold outQ2 23
Numbers
QuarterBought or addedCut or sold out
Q4 20225553
Q1 20235764
Q2 20236263

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$200k$400k$600k$800kQ3 22 calls: $59.0kQ3 22 puts: $104.0kQ3 22P/C 1.76Q4 22 calls: $46.4kQ4 22 puts: $0Q4 22P/C 0.00Q1 23 calls: $152.5kQ1 23 puts: $0Q1 23P/C 0.00Q2 23 calls: $619.5kQ2 23 puts: $2.1kQ2 23P/C 0.00
Numbers
QuarterCallsPutsP/C
Q3 2022$59.0k$104.0k1.76
Q4 2022$46.4k$00.00
Q1 2023$152.5k$00.00
Q2 2023$619.5k$2.1k0.00

Biggest buyers

LOOMIS SAYLES & CO L P New +976,971+977.0k
Roubaix Capital, LLC New +514,817+514.8k
Informed Momentum Co LLC Added +456,856+456.9k
WELLINGTON MANAGEMENT GROUP LLP Added +447,900+447.9k
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP Added +382,611+382.6k
Tieton Capital Management, LLC Added +292,075+292.1k
Empowered Funds, LLC New +260,149+260.1k
MARSHALL WACE, LLP New +236,770+236.8k
ROYCE & ASSOCIATES LP Added +221,500+221.5k
DIMENSIONAL FUND ADVISORS LP Added +180,764+180.8k

Biggest sellers

CANNELL CAPITAL LLC Sold out -1,199,039-1.2m
MILLENNIUM MANAGEMENT LLC Reduced -600,129-600.1k
ADAGE CAPITAL PARTNERS GP, L.L.C. Reduced -493,505-493.5k
Oslo Asset Management AS Sold out -492,017-492.0k
ACADIAN ASSET MANAGEMENT LLC Reduced -279,183-279.2k
D. E. Shaw & Co., Inc. Reduced -250,016-250.0k
PANAGORA ASSET MANAGEMENT INC Reduced -180,381-180.4k
VANGUARD GROUP INC Reduced -171,484-171.5k
BlackRock Inc. Reduced -146,080-146.1k
STATE STREET CORP Reduced -105,092-105.1k

Biggest calls

CITADEL ADVISORS LLC Added $423.6k81.0k shares
GROUP ONE TRADING LLC Added $167.9k32.1k shares
SIMPLEX TRADING, LLC Reduced $28.0k5.4k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Biggest puts

CITADEL ADVISORS LLC New $2.1k400 shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
BlackRock, Inc. 13G · institution filed 2026-07-29 8.4% 7.1m≈ $113.1m 2026-07-29
AMERIPRISE FINANCIAL INC 13G · institution -1.5 pts · filed 2025-11-14 6.2% -1.5 pts 5.2m≈ $83.5m 2025-11-14
VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-07-31 5.0% new 4.2m≈ $67.4m 2026-07-31

Fell to 5% or below in the last year: DIMENSIONAL FUND ADVISORS LP (4.7%, 2026-04-09), VANGUARD GROUP INC (0.0%, 2026-03-27; now reported by VANGUARD CAPITAL MANAGEMENT LLC)

Insider purchases and sales in Q2 2023

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
505Q3 21: 0 buyingQ3 21: 0 sellingQ4 21: 0 buyingQ4 21: 0 sellingQ4 21Q1 22: 0 buyingQ1 22: 0 sellingQ2 22: 1 buyingQ2 22: 0 sellingQ2 22Q3 22: 5 buyingQ3 22: 0 sellingQ4 22: 4 buyingQ4 22: 0 sellingQ4 22Q1 23: 1 buyingQ1 23: 0 sellingQ2 23: 0 buyingQ2 23: 0 sellingQ2 23
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q3 20210—0——
Q4 20210—0——
Q1 20220—0——
Q2 20221$311.2k0——
Q3 20225$390.0k0——
Q4 20224$196.8k0——
Q1 20231$40.2k0——
Q2 20230—0——

None reported in Q2 2023.

Holders, Q2 2023

#ManagerLocationShares Value% of their portfolioChangeShares change
1 AMERIPRISE FINANCIAL INC 0.01% of their portfolio MINNEAPOLIS, MN 7,430,0987.4m $38.9m $38.9m 0.01% Added +92.4k +92,417
2 BlackRock Inc. 0.00% of their portfolio New York, NY 5,913,6065.9m $30.9m $30.9m 0.00% Reduced -146.1k -146,080
3 ADAGE CAPITAL PARTNERS GP, L.L.C. 0.06% of their portfolio Boston, MA 5,484,9535.5m $28.7m $28.7m 0.06% Reduced -493.5k -493,505
4 DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio AUSTIN, TX 5,313,9295.3m $27.8m $27.8m 0.01% Added +180.8k +180,764
5 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 4,024,0964.0m $21.0m $21.0m 0.00% Reduced -171.5k -171,484
6 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 1,749,1241.7m $9.1m $9.1m 0.00% Reduced -105.1k -105,092
7 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 1,732,4561.7m $9.1m $9.1m 0.00% Added +169.2k +169,192
8 ACADIAN ASSET MANAGEMENT LLC 0.03% of their portfolio Boston, MA 1,610,4931.6m $8.4m $8.4m 0.03% Reduced -279.2k -279,183
9 HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC 0.03% of their portfolio Los Angeles, CA 1,610,1401.6m $8.4m $8.4m 0.03% Reduced -1.9k -1,910
10 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 1,503,4911.5m $7.9m $7.9m 0.00% Reduced -103.2k -103,233
11 ROYCE & ASSOCIATES LP 0.07% of their portfolio New York, NY 1,466,4001.5m $7.7m $7.7m 0.07% Added +221.5k +221,500
12 Nuveen Asset Management, LLC 0.00% of their portfolio CHICAGO, IL 1,168,1611.2m $6.1m $6.1m 0.00% Added +90.0k +89,970
13 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 1,130,3571.1m $5.9m $5.9m 0.00% Added +750 +750
14 LOOMIS SAYLES & CO L P 0.01% of their portfolio BOSTON, MA 976,971977.0k $5.1m $5.1m 0.01% New
15 Acacia Research Corp 44.33% of their portfolio New York, NY 902,210902.2k $4.7m $4.7m 44.33% Added +46.7k +46,715
16 Tieton Capital Management, LLC 2.98% of their portfolio YAKIMA, WA 886,795886.8k $4.6m $4.6m 2.98% Added +292.1k +292,075
17 TWO SIGMA ADVISERS, LP 0.01% of their portfolio NEW YORK, NY 865,791865.8k $4.5m $4.5m 0.01% Reduced -48.7k -48,700
18 PUTNAM INVESTMENTS LLC 0.01% of their portfolio BOSTON, MA 833,252833.3k $4.4m $4.4m 0.01% Reduced -35.3k -35,304
19 TWO SIGMA INVESTMENTS, LP 0.01% of their portfolio NEW YORK, NY 796,631796.6k $4.2m $4.2m 0.01% Added +35.0k +34,966
20 WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio Boston, MA 726,500726.5k $3.8m $3.8m 0.00% Added +447.9k +447,900
21 BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.09% of their portfolio HOUSTON, TX 692,249692.2k $3.6m $3.6m 0.09% Reduced -28.1k -28,086
22 ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.00% of their portfolio BOSTON, MA 687,804687.8k $3.6m $3.6m 0.00% Added +382.6k +382,611
23 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 665,366665.4k $3.5m $3.5m 0.00% Reduced -600.1k -600,129
24 FULLER & THALER ASSET MANAGEMENT, INC. 0.02% of their portfolio SAN MATEO, CA 657,010657.0k $3.4m $3.4m 0.02% Reduced -4.7k -4,705
25 D. E. Shaw & Co., Inc. 0.01% of their portfolio New York, NY 640,613640.6k $3.4m $3.4m 0.01% Reduced -250.0k -250,016
26 Informed Momentum Co LLC 0.53% of their portfolio SOLANA BEACH, CA 542,587542.6k $2.8m $2.8m 0.53% Added +456.9k +456,856
27 Roubaix Capital, LLC 1.98% of their portfolio DENVER, CO 514,817514.8k $2.7m $2.7m 1.98% New
28 AQR CAPITAL MANAGEMENT LLC 0.01% of their portfolio Greenwich, CT 504,469504.5k $2.6m $2.6m 0.01% Reduced -43.0k -43,039
29 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 475,376475.4k $2.5m $2.5m 0.00% Added +72.1k +72,083
30 AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio KANSAS CITY, MO 341,735341.7k $1.8m $1.8m 0.00% Added +87.2k +87,177
31 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 313,830313.8k $1.6m $1.6m 0.00% Reduced -23.3k -23,320
32 PRUDENTIAL FINANCIAL INC 0.00% of their portfolio NEWARK, NJ 303,624303.6k $1.6m $1.6m 0.00% Added +47.0k +47,000
33 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 282,559282.6k $1.5m $1.5m 0.00% Reduced -2.3k -2,289
34 Squarepoint Ops LLC 0.01% of their portfolio NEW YORK, NY 261,134261.1k $1.4m $1.4m 0.01% Added +177.4k +177,399
35 Empowered Funds, LLC 0.05% of their portfolio NEWTOWN SQUARE, PA 260,149260.1k $1.4m $1.4m 0.05% New
36 EA Series Trust 0.05% of their portfolio HAVERTOWN, PA 260,149260.1k $1.4m $1.4m 0.05% First filing
37 MARSHALL WACE, LLP 0.00% of their portfolio LONDON, X0 236,770236.8k $1.2m $1.2m 0.00% New
38 Assenagon Asset Management S.A. 0.00% of their portfolio SENNINGERBERG, N4 217,646217.6k $1.1m $1.1m 0.00% Reduced -20.0k -19,974
39 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 206,447206.4k $1.1m $1.1m 0.00% Reduced -22.4k -22,366
40 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 196,395196.4k $1.0m $1.0m 0.00% Added +34.5k +34,464
41 First Eagle Investment Management, LLC 0.00% of their portfolio NEW YORK, NY 181,883181.9k $951.2k $951.2k 0.00% Reduced -31.0k -31,000
42 ClariVest Asset Management LLC 0.04% of their portfolio SAN DIEGO, CA 157,360157.4k $822.0k $822.0k 0.04% Added +28.5k +28,475
43 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 153,105153.1k $800.7k $800.7k 0.00% Reduced -3.5k -3,506
44 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 149,316149.3k $780.9k $780.9k 0.00% Added +4.0k +4,029
45 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 146,011146.0k $763.6k $763.6k 0.00% Added +17.7k +17,745
46 Perritt Capital Management Inc 0.37% of their portfolio Chicago, IL 130,000130.0k $679.9k $679.9k 0.37% Added +5.0k +5,000
47 Connor, Clark & Lunn Investment Management Ltd. 0.00% of their portfolio VANCOUVER, A1 118,679118.7k $620.7k $620.7k 0.00% Reduced -6.7k -6,747
48 STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio MADISON, WI 110,000110.0k $575.3k $575.3k 0.00% Reduced -50.0k -50,000
49 STRS OHIO 0.00% of their portfolio COLUMBUS, OH 105,000105.0k $549.0k $549.0k 0.00% Added +96.3k +96,300
50 SG Americas Securities, LLC 0.00% of their portfolio NEW YORK, NY 104,178104.2k $545.0k $545.0k 0.00% Reduced -37.2k -37,166
51 HRT FINANCIAL LP 0.00% of their portfolio NEW YORK, NY 85,52785.5k $447.0k $447.0k 0.00% Added +61.1k +61,105
52 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 85,01885.0k $444.6k $444.6k 0.00% Added +13.5k +13,459
53 EARNEST PARTNERS LLC 0.00% of their portfolio ATLANTA, GA 84,28084.3k $440.8k $440.8k 0.00% Unchanged
54 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 83,49583.5k $436.7k $436.7k 0.00% Added +27.5k +27,543
55 Pacific Ridge Capital Partners, LLC 0.10% of their portfolio LAKE OSWEGO, OR 83,06183.1k $434.4k $434.4k 0.10% Added +151 +151
56 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 82,68382.7k $432.4k $432.4k 0.00% Added +46.3k +46,301
57 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 82,52482.5k $431.6k $431.6k 0.00% Added +6.3k +6,320
58 ALGERT GLOBAL LLC 0.02% of their portfolio SAN FRANCISCO, CA 82,15082.2k $429.6k $429.6k 0.02% Reduced -1.9k -1,930
59 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 81,51081.5k $426.3k $426.3k 0.00% Reduced -5.7k -5,725
60 Virtu Financial LLC 0.03% of their portfolio New York, NY 74,54774.5k $390.0k $390.0k 0.03% New
61 PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio BALTIMORE, MD 74,18674.2k $388.0k $388.0k 0.00% Added +23.0k +23,000
62 SEI INVESTMENTS CO 0.00% of their portfolio OAKS, PA 70,37770.4k $368.1k $368.1k 0.00% Unchanged
63 HSBC HOLDINGS PLC 0.00% of their portfolio LONDON, X0 62,94062.9k $333.0k $333.0k 0.00% Added +7.1k +7,062
64 PANAGORA ASSET MANAGEMENT INC 0.00% of their portfolio BOSTON, MA 58,92058.9k $308.2k $308.2k 0.00% Reduced -180.4k -180,381
65 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 56,32856.3k $294.6k $294.6k 0.00% Reduced -28.7k -28,724
66 Campbell & CO Investment Adviser LLC 0.05% of their portfolio BALTIMORE, MD 54,98755.0k $287.6k $287.6k 0.05% New
67 IRONWOOD INVESTMENT MANAGEMENT LLC 0.16% of their portfolio BOSTON, MA 53,47153.5k $279.7k $279.7k 0.16% Reduced -662 -662
68 Walleye Capital LLC 0.00% of their portfolio NEW YORK, NY 49,41249.4k $258.4k $258.4k 0.00% Reduced -55.4k -55,368
69 STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.00% of their portfolio TALLAHASSEE, FL 48,52248.5k $253.8k $253.8k 0.00% Unchanged
70 MetLife Investment Management, LLC 0.00% of their portfolio Whippany, NJ 46,29646.3k $242.1k $242.1k 0.00% Unchanged
71 UBS Group AG 0.00% of their portfolio ZURICH, V8 43,73643.7k $228.7k $228.7k 0.00% Added +10.8k +10,835
72 Brandywine Global Investment Management, LLC 0.00% of their portfolio PHILADELPHIA, PA 40,24040.2k $210.5k $210.5k 0.00% Reduced -40.2k -40,240
73 FEDERATED HERMES, INC. 0.00% of their portfolio PITTSBURGH, PA 39,74939.7k $207.9k $207.9k 0.00% Reduced -3.1k -3,104
74 Aristides Capital LLC 0.12% of their portfolio LOUISVILLE, KY 38,99239.0k $203.9k $203.9k 0.12% New
75 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 37,87137.9k $198.1k $198.1k 0.00% New
76 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 37,34037.3k $195.3k $195.3k 0.00% Added +13.6k +13,619
77 VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio ATLANTA, GA 37,13237.1k $194.2k $194.2k 0.00% Added +779 +779
78 AMERICAN INTERNATIONAL GROUP, INC. 0.00% of their portfolio New York, NY 36,56236.6k $191.2k $191.2k 0.00% Reduced -5.1k -5,071
79 Quadrature Capital Ltd 0.00% of their portfolio LONDON, X0 36,43936.4k $190.4k $190.4k 0.00% Added +13.9k +13,869
80 FRANKLIN RESOURCES INC 0.00% of their portfolio San Mateo, CA 35,49335.5k $185.6k $185.6k 0.00% New
81 Baader Bank Aktiengesellschaft 0.02% of their portfolio Unterschleissheim, 2M 35,00035.0k $183.1k $183.1k 0.02% New
82 OCCUDO QUANTITATIVE STRATEGIES LP 0.02% of their portfolio FORT LAUDERDALE, FL 34,28534.3k $179.3k $179.3k 0.02% Added +12.6k +12,566
83 Jump Financial, LLC 0.01% of their portfolio Chicago, IL 33,21133.2k $173.7k $173.7k 0.01% Reduced -1.5k -1,457
84 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio Toronto, A6 33,08833.1k $173.1k $173.1k 0.00% Reduced -2.3k -2,335
85 Kathmere Capital Management, LLC 0.03% of their portfolio WAYNE, PA 32,84432.8k $171.8k $171.8k 0.03% New
86 CAXTON ASSOCIATES LP 0.02% of their portfolio NEW YORK, NY 31,41231.4k $164.3k $164.3k 0.02% Unchanged
87 Terril Brothers, Inc. 0.07% of their portfolio St. Louis, MO 31,00031.0k $162.1k $162.1k 0.07% Added +12.0k +12,000
88 State of Wyoming 0.04% of their portfolio CHEYENNE, WY 29,25229.3k $153.0k $153.0k 0.04% Reduced -25.3k -25,321
89 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 28,88728.9k $151.1k $151.1k 0.00% Reduced -24.7k -24,682
90 PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO 0.00% of their portfolio DENVER, CO 26,32826.3k $138.0k $138.0k 0.00% Unchanged
91 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio WEST SACRAMENTO, CA 25,26825.3k $132.2k $132.2k 0.00% Reduced -6.8k -6,804
92 Simplicity Solutions, LLC 0.00% of their portfolio MINNEAPOLIS, MN 23,77223.8k $124.3k $124.3k 0.00% Reduced -77 -77
93 Bleakley Financial Group, LLC 0.00% of their portfolio PARSIPPANY, NJ 23,77223.8k $124.3k $124.3k 0.00% Reduced -77 -77
94 Cetera Advisors LLC 0.00% of their portfolio DENVER, CO 23,15023.1k $121.1k $121.1k 0.00% Unchanged
95 Quantbot Technologies LP 0.01% of their portfolio NEW YORK, NY 22,39022.4k $117.1k $117.1k 0.01% Reduced -35.3k -35,279
96 MERCER GLOBAL ADVISORS INC /ADV 0.00% of their portfolio DENVER, CO 20,56420.6k $108.0k $108.0k 0.00% Added +1.2k +1,154
97 Nebula Research & Development LLC 0.07% of their portfolio New York, NY 17,59417.6k $92.0k $92.0k 0.07% Reduced -4.9k -4,859
98 Schonfeld Strategic Advisors LLC 0.00% of their portfolio NEW YORK, NY 14,96415.0k $78.3k $78.3k 0.00% New
99 TWO SIGMA SECURITIES, LLC 0.01% of their portfolio NEW YORK, NY 14,95715.0k $78.2k $78.2k 0.01% New
100 XTX Topco Ltd 0.01% of their portfolio LONDON, X0 14,90614.9k $78.0k $78.0k 0.01% New