Vault-13

NATIONAL ENERGY SERVICES REU NESR

SHS · Common Stock · CUSIP G6375R107

189 institutional holders +44 vs Q4 2025
61,234,27261.2m shares reported held*
60.7% of all shares outstanding*
$1.3bnreported value*
58 new 69 added 49 reduced 16 sold out net bought ≈ $63.5m (+3.0m 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 ($15.5m this quarter). Holder counts are more reliable. Shares outstanding: 100.8m as of 2026-03-31, 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 ≈ $21.45. Options: 5 managers hold calls ($5.1m notional), 0 hold puts (—).

Trends to Q1 2026

Institutional holders

Managers reporting a position, each quarter

0100200Q3 22: 95Q4 22: 110Q1 23: 98Q2 23: 6Q3 23: 1Q4 23: 2Q1 24: 1Q2 24: 1Q3 24: 1Q4 24: 62Q1 25: 80Q2 25: 96Q3 25: 122Q4 25: 145Q1 26: 189189Q3 22Q3 23Q3 24Q3 25Q1 26
Numbers
QuarterHolders
Q3 202295
Q4 2022110
Q1 202398
Q2 20236
Q3 20231
Q4 20232
Q1 20241
Q2 20241
Q3 20241
Q4 202462
Q1 202580
Q2 202596
Q3 2025122
Q4 2025145
Q1 2026189

Buyers vs sellers

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

Bought or addedCut or sold out
2000200Q2 24: 1 bought or addedQ2 24: 0 cut or sold outQ3 24: 1 bought or addedQ3 24: 0 cut or sold outQ3 24Q4 24: 60 bought or addedQ4 24: 0 cut or sold outQ1 25: 45 bought or addedQ1 25: 26 cut or sold outQ1 25Q2 25: 65 bought or addedQ2 25: 45 cut or sold outQ3 25: 76 bought or addedQ3 25: 46 cut or sold outQ3 25Q4 25: 94 bought or addedQ4 25: 50 cut or sold outQ1 26: 127 bought or addedQ1 26: 65 cut or sold outQ1 26
Numbers
QuarterBought or addedCut or sold out
Q2 202410
Q3 202410
Q4 2024600
Q1 20254526
Q2 20256545
Q3 20257646
Q4 20259450
Q1 202612765

Calls vs puts

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

CallsPuts
$0$2m$4m$6mQ2 25 calls: $0Q2 25 puts: $0Q2 25P/C —Q3 25 calls: $0Q3 25 puts: $0Q3 25P/C —Q4 25 calls: $0Q4 25 puts: $0Q4 25P/C —Q1 26 calls: $5.1mQ1 26 puts: $0Q1 26P/C 0.00
Numbers
QuarterCallsPutsP/C
Q2 2025$0$0—
Q3 2025$0$0—
Q4 2025$0$0—
Q1 2026$5.1m$00.00

Biggest buyers

T. Rowe Price Investment Management, Inc. Added +2,581,043+2.6m
FMR LLC Added +1,760,951+1.8m
AMERIPRISE FINANCIAL INC Added +1,259,659+1.3m
DIMENSIONAL FUND ADVISORS LP Added +997,300+997.3k
Point72 Asset Management, L.P. New +964,985+965.0k
JPMORGAN CHASE & CO Added +950,127+950.1k
Walleye Capital LLC New +887,068+887.1k
HRT FINANCIAL LP New +822,652+822.7k
Qube Research & Technologies Ltd New +666,554+666.6k
Nuveen, LLC Added +627,626+627.6k

Biggest sellers

SCF Partners, Inc. Reduced -6,491,677-6.5m
Encompass Capital Advisors LLC Reduced -2,841,895-2.8m
CITADEL ADVISORS LLC Reduced -1,505,168-1.5m
Driehaus Capital Management LLC Sold out -1,492,513-1.5m
GeoSphere Capital Management, LLC Reduced -865,546-865.5k
Fort Baker Capital Management LP Sold out -783,649-783.6k
HITE Hedge Asset Management LLC Reduced -626,008-626.0k
Oceanic Investment Management LTD Reduced -533,143-533.1k
MILLENNIUM MANAGEMENT LLC Reduced -426,187-426.2k
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC Reduced -404,390-404.4k

Biggest calls

Caption Management, LLC New $4.2m195.0k shares
JANE STREET GROUP, LLC New $659.1k30.7k shares
CITADEL ADVISORS LLC New $249.1k11.6k shares
SIMPLEX TRADING, LLC New $6.4k300 shares
GROUP ONE TRADING LLC New $2.1k100 shares

Biggest puts

None

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
FMR LLC 13G · institution +1.0 pts · filed 2026-05-07 10.1% +1.0 pts 10.2m≈ $305.4m 2026-05-07

Fell to 5% or below in the last year: Encompass Capital Advisors LLC (4.2%, 2026-05-15), Mubbadrah Investment LLC (4.2%, 2026-02-17)

Insider purchases and sales in Q1 2026

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.

None reported in Q1 2026.

Holders, Q1 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 FMR LLC 0.01% of their portfolio BOSTON, MA 9,177,0429.2m $197.0m $197.0m 0.01% Added +1.8m +1,760,951
2 Encompass Capital Advisors LLC 3.73% of their portfolio New York, NY 4,261,3894.3m $91.5m $91.5m 3.73% Reduced -2.8m -2,841,895
3 BlackRock, Inc. 0.00% of their portfolio New York, NY 3,696,0163.7m $79.4m $79.4m 0.00% Added +273.8k +273,763
4 T. Rowe Price Investment Management, Inc. 0.05% of their portfolio BALTIMORE, MD 3,260,5873.3m $70.0m $70.0m 0.05% Added +2.6m +2,581,043
5 Boston Partners 0.05% of their portfolio BOSTON, MA 2,213,3192.2m $47.7m $47.7m 0.05% Added +260.0k +259,991
6 DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio AUSTIN, TX 1,960,5872.0m $42.1m $42.1m 0.01% Added +997.3k +997,300
7 Dodge & Cox 0.02% of their portfolio San Francisco, CA 1,599,9941.6m $34.4m $34.4m 0.02% Reduced -329.1k -329,100
8 SCF Partners, Inc. 100.00% of their portfolio Houston, TX 1,500,0001.5m $32.2m $32.2m 100.00% Reduced -6.5m -6,491,677
9 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 1,334,8681.3m $27.8m $27.8m 0.00% Added +950.1k +950,127
10 AMERIPRISE FINANCIAL INC 0.01% of their portfolio MINNEAPOLIS, MN 1,333,6541.3m $28.6m $28.6m 0.01% Added +1.3m +1,259,659
11 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 1,037,9011.0m $22.3m $22.3m 0.00% Added +111.8k +111,772
12 CITADEL ADVISORS LLC 0.02% of their portfolio MIAMI, FL 992,540992.5k $21.3m $21.3m 0.02% Reduced -1.5m -1,505,168
13 Point72 Asset Management, L.P. 0.04% of their portfolio STAMFORD, CT 964,985965.0k $20.7m $20.7m 0.04% New
14 Holocene Advisors, LP 0.05% of their portfolio New York, NY 948,001948.0k $20.4m $20.4m 0.05% Added +130.8k +130,842
15 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 919,527919.5k $19.7m $19.7m 0.00% Added +78.2k +78,220
16 Walleye Capital LLC 0.12% of their portfolio NEW YORK, NY 887,068887.1k $19.0m $19.0m 0.12% New
17 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 859,740859.7k $18.5m $18.5m 0.00% Added +242.8k +242,768
18 ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.01% of their portfolio BOSTON, MA 846,597846.6k $18.2m $18.2m 0.01% Added +365.2k +365,217
19 JACOBS LEVY EQUITY MANAGEMENT, INC 0.08% of their portfolio FLORHAM PARK, NJ 839,962840.0k $18.0m $18.0m 0.08% Added +574.7k +574,673
20 HRT FINANCIAL LP 0.06% of their portfolio NEW YORK, NY 822,652822.7k $17.7m $17.7m 0.06% New
21 VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio MALVERN, PA 817,208817.2k $17.5m $17.5m 0.00% First filing
22 MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio NEW YORK, NY 811,398811.4k $17.4m $17.4m 0.01% Reduced -426.2k -426,187
23 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 801,716801.7k $17.2m $17.2m 0.00% Added +600.0k +599,967
24 Nuveen, LLC 0.00% of their portfolio CHARLOTTE, NC 776,390776.4k $16.7m $16.7m 0.00% Added +627.6k +627,626
25 BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.32% of their portfolio HOUSTON, TX 739,018739.0k $15.9m $15.9m 0.32% Added +22.6k +22,650
26 Occam Crest Management LP 8.99% of their portfolio DARIEN, CT 673,545673.5k $14.5m $14.5m 8.99% Reduced -386.1k -386,143
27 Qube Research & Technologies Ltd 0.02% of their portfolio LONDON, X0 666,554666.6k $14.3m $14.3m 0.02% New
28 Russell Investments Group, Ltd. 0.02% of their portfolio Seattle, WA 652,619652.6k $14.0m $14.0m 0.02% Reduced -28.3k -28,282
29 AQR CAPITAL MANAGEMENT LLC 0.01% of their portfolio Greenwich, CT 645,024645.0k $13.8m $13.8m 0.01% Added +140.5k +140,494
30 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 621,132621.1k $13.3m $13.3m 0.00% Added +526.1k +526,131
31 Trexquant Investment LP 0.09% of their portfolio STAMFORD, CT 611,140611.1k $13.1m $13.1m 0.09% New
32 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 597,400597.4k $12.8m $12.8m 0.00% Added +105.2k +105,205
33 GeoSphere Capital Management, LLC 7.10% of their portfolio MIAMI BEACH, FL 549,578549.6k $11.8m $11.8m 7.10% Reduced -865.5k -865,546
34 Alyeska Investment Group, L.P. 0.03% of their portfolio CHICAGO, IL 546,450546.5k $11.7m $11.7m 0.03% Reduced -233.1k -233,106
35 Empowered Funds, LLC 0.07% of their portfolio NEWTOWN SQUARE, PA 491,009491.0k $10.5m $10.5m 0.07% Added +41.7k +41,741
36 JANE STREET GROUP, LLC 0.01% of their portfolio NEW YORK, NY 467,512467.5k $10.0m $10.0m 0.01% Added +428.3k +428,290
37 UBS Group AG 0.00% of their portfolio ZURICH, V8 447,199447.2k $9.6m $9.6m 0.00% Added +116.0k +116,017
38 SummitTX Capital, L.P. 0.30% of their portfolio FORT WORTH, TX 441,589441.6k $9.5m $9.5m 0.30% Reduced -43.6k -43,565
39 VAN ECK ASSOCIATES CORP 0.01% of their portfolio NEW YORK, NY 426,842426.8k $9.2m $9.2m 0.01% New
40 Phocas Financial Corp. 1.40% of their portfolio ALAMEDA, CA 414,003414.0k $8.9m $8.9m 1.40% Reduced -116.7k -116,738
41 D. E. Shaw & Co., Inc. 0.01% of their portfolio New York, NY 394,921394.9k $8.5m $8.5m 0.01% Added +321.5k +321,513
42 TWO SIGMA INVESTMENTS, LP 0.01% of their portfolio NEW YORK, NY 391,232391.2k $8.4m $8.4m 0.01% Added +338.8k +338,793
43 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 352,569352.6k $7.6m $7.6m 0.00% Added +56.9k +56,920
44 Squarepoint Ops LLC 0.02% of their portfolio NEW YORK, NY 342,292342.3k $7.3m $7.3m 0.02% Added +309.1k +309,130
45 HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.01% of their portfolio TORONTO, A6 334,823334.8k $7.2m $7.2m 0.01% Added +179.5k +179,498
46 Man Group plc 0.01% of their portfolio LONDON, X0 328,422328.4k $7.1m $7.1m 0.01% Added +239.7k +239,700
47 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 328,040328.0k $7.0m $7.0m 0.00% Reduced -3.1k -3,082
48 CenterBook Partners LP 0.35% of their portfolio GREENWICH, CT 307,103307.1k $6.6m $6.6m 0.35% Added +142.0k +142,037
49 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 305,978306.0k $6.6m $6.6m 0.00% Added +292.2k +292,183
50 HITE Hedge Asset Management LLC 0.36% of their portfolio BRAINTREE, MA 293,373293.4k $6.3m $6.3m 0.36% Reduced -626.0k -626,008
51 Informed Momentum Co LLC 0.69% of their portfolio SOLANA BEACH, CA 280,139280.1k $6.0m $6.0m 0.69% Reduced -28.7k -28,689
52 ACADIAN ASSET MANAGEMENT LLC 0.01% of their portfolio Boston, MA 267,185267.2k $5.7m $5.7m 0.01% Added +251.5k +251,497
53 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 254,636254.6k $5.5m $5.5m 0.00% Added +80.1k +80,054
54 IRIDIAN ASSET MANAGEMENT LLC/CT 2.04% of their portfolio WESTPORT, CT 234,476234.5k $5.0m $5.0m 2.04% Reduced -5.9k -5,907
55 Aventail Capital Group, LP 0.23% of their portfolio NEW YORK, NY 225,734225.7k $4.8m $4.8m 0.23% Added +81.1k +81,121
56 Turas Capital Management LP 1.21% of their portfolio BOSTON, MA 220,800220.8k $4.7m $4.7m 1.21% New
57 LMR Partners LLP 0.04% of their portfolio LONDON, X0 192,788192.8k $4.1m $4.1m 0.04% New
58 XTX Topco Ltd 0.07% of their portfolio LONDON, X0 191,808191.8k $4.1m $4.1m 0.07% New
59 Oxbow Advisors, LLC 0.32% of their portfolio Austin, TX 175,127175.1k $3.8m $3.8m 0.32% Reduced -86.8k -86,783
60 Oceanic Investment Management LTD 2.97% of their portfolio DOUGLAS, Y8 162,400162.4k $3.5m $3.5m 2.97% Reduced -533.1k -533,143
61 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 159,622159.6k $3.4m $3.4m 0.00% Added +22.2k +22,234
62 Engineers Gate Manager LP 0.04% of their portfolio NEW YORK, NY 156,316156.3k $3.4m $3.4m 0.04% New
63 LOS ANGELES CAPITAL MANAGEMENT LLC 0.01% of their portfolio LOS ANGELES, CA 150,239150.2k $3.2m $3.2m 0.01% Added +109.3k +109,298
64 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 147,965148.0k $3.2m $3.2m 0.00% Reduced -4.5k -4,514
65 HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC 0.01% of their portfolio Los Angeles, CA 139,220139.2k $3.0m $3.0m 0.01% Reduced -404.4k -404,390
66 VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio San Antonio, TX 137,625137.6k $3.0m $3.0m 0.00% Added +59.3k +59,265
67 AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio KANSAS CITY, MO 136,844136.8k $2.9m $2.9m 0.00% Reduced -271.7k -271,666
68 TUDOR INVESTMENT CORP ET AL 0.02% of their portfolio STAMFORD, CT 132,476132.5k $2.8m $2.8m 0.02% New
69 ExodusPoint Capital Management, LP 0.03% of their portfolio NEW YORK, NY 129,650129.7k $2.8m $2.8m 0.03% New
70 PRUDENTIAL FINANCIAL INC 0.00% of their portfolio NEWARK, NJ 126,780126.8k $2.7m $2.7m 0.00% New
71 SEI INVESTMENTS CO 0.00% of their portfolio OAKS, PA 124,472124.5k $2.7m $2.7m 0.00% Added +42.0k +42,006
72 LAZARD ASSET MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 120,408120.4k $2.6m $2.6m 0.00% Added +2.6k +2,630
73 CREDIT AGRICOLE S A 0.01% of their portfolio Montrouge Cedex, I0 120,000120.0k $2.6m $2.6m 0.01% New
74 RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio ST. PETERSBURG, FL 108,406108.4k $2.3m $2.3m 0.00% Added +95.7k +95,653
75 Jump Financial, LLC 0.03% of their portfolio Chicago, IL 105,626105.6k $2.3m $2.3m 0.03% New
76 Inspire Investing, LLC 0.13% of their portfolio MERIDIAN, ID 102,664102.7k $2.2m $2.2m 0.13% Reduced -14.0k -13,992
77 PRINCIPAL FINANCIAL GROUP INC 0.00% of their portfolio DES MOINES, IA 100,301100.3k $2.2m $2.2m 0.00% Added +15.0k +14,968
78 TD Asset Management Inc 0.00% of their portfolio Toronto, A6 92,40892.4k $2.0m $2.0m 0.00% Added +78.7k +78,688
79 NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio ALBANY, NY 92,02092.0k $2.0m $2.0m 0.00% Unchanged
80 EdgePoint Investment Group Inc. 0.02% of their portfolio TORONTO, A6 89,99990.0k $1.9m $1.9m 0.02% Unchanged
81 GSA CAPITAL PARTNERS LLP 0.12% of their portfolio LONDON, X0 88,16688.2k $1.9m $1.9m 0.12% New
82 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 83,72083.7k $1.8m $1.8m 0.00% Added +12.6k +12,584
83 PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.01% of their portfolio COLUMBUS, OH 80,81780.8k $1.7m $1.7m 0.01% New
84 IEQ CAPITAL, LLC 0.01% of their portfolio Foster City, CA 80,38280.4k $1.7m $1.7m 0.01% Reduced -5.0k -4,955
85 SCHRODER INVESTMENT MANAGEMENT GROUP 0.00% of their portfolio London, X0 80,13780.1k $1.7m $1.7m 0.00% New
86 Calamos Advisors LLC 0.01% of their portfolio NAPERVILLE, IL 77,80777.8k $1.7m $1.7m 0.01% New
87 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 75,28875.3k $1.6m $1.6m 0.00% Added +40.2k +40,182
88 FRANKLIN RESOURCES INC 0.00% of their portfolio San Mateo, CA 72,84172.8k $1.6m $1.6m 0.00% Added +8.0k +8,020
89 Penn Capital Management Company, LLC 0.12% of their portfolio PHILADELPHIA, PA 72,32972.3k $1.6m $1.6m 0.12% Reduced -29.0k -28,993
90 HSBC HOLDINGS PLC 0.00% of their portfolio LONDON, X0 71,03371.0k $1.5m $1.5m 0.00% Reduced -25.4k -25,363
91 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 62,60762.6k $1.3m $1.3m 0.00% Reduced -136.5k -136,497
92 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 60,80060.8k $952.1k $952.1k 0.00% Unchanged
93 ATLANTIC INVESTMENT MANAGEMENT, INC. 0.75% of their portfolio New York, NY 60,00060.0k $1.3m $1.3m 0.75% New
94 BOOTHBAY FUND MANAGEMENT, LLC 0.03% of their portfolio NEW YORK, NY 55,69055.7k $1.2m $1.2m 0.03% Reduced -168.1k -168,056
95 Creative Planning 0.00% of their portfolio OVERLAND PARK, KS 49,06649.1k $1.1m $1.1m 0.00% Added +16.0k +15,979
96 O'SHAUGHNESSY ASSET MANAGEMENT, LLC 0.01% of their portfolio Stamford, CT 48,52148.5k $1.0m $1.0m 0.01% New
97 PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio BALTIMORE, MD 47,86247.9k $1.0m $1.0m 0.00% Added +13.1k +13,055
98 CIBC Bancorp USA Inc. 0.00% of their portfolio CHICAGO, IL 46,30246.3k $994.1k $994.1k 0.00% First filing
99 Atom Investors LP 0.07% of their portfolio AUSTIN, TX 43,68943.7k $938.0k $938.0k 0.07% Reduced -10.3k -10,339
100 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 40,71940.7k $874.2k $874.2k 0.00% Reduced -27.5k -27,496