Vault-13

NINE ENERGY SERVICE INC NINE

COMMON STOCK · Common Stock · CUSIP 65441V200

17 institutional holders
11,648,23411.6m shares reported held*
83.5% of all shares outstanding*
$95.1mreported value*

* 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. Holder counts are more reliable. Shares outstanding: 13.9m as of 2026-04-27, 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 ≈ $8.16.

Biggest buyers

MacKay Shields LLC New +3,066,434+3.1m
Philosophy Capital Management LLC New +2,551,128+2.6m
ADAGE CAPITAL PARTNERS GP, L.L.C. New +1,355,149+1.4m
CastleKnight Management LP New +1,157,943+1.2m
ALGEBRIS (UK) LTD New +789,895+789.9k
GENDELL JEFFREY L New +784,501+784.5k
NOMURA HOLDINGS INC New +502,053+502.1k
Cygnus Capital Advisors, LLC New +455,058+455.1k
MACKENZIE FINANCIAL CORP New +361,301+361.3k
Liberty Mutual Group Asset Management Inc. New +281,184+281.2k

Biggest sellers

None

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
Philosophy Capital Management LLC 13G · institution -1.3 pts · filed 2026-08-14 17.0% -1.3 pts 2.4m≈ $30.9m 2026-08-14
MACKAY SHIELDS LLC 13G · institution no change · filed 2026-03-31 11.9% no change 1.7m≈ $21.6m 2026-03-31
Adage Capital Management, L.P. 13G · exempt (held before listing) new · filed 2026-07-09 9.7% new 1.4m≈ $17.6m 2026-07-09
CastleKnight Master Fund LP 13G · passive investor new · filed 2026-04-09 8.3% new 1.2m≈ $15.1m 2026-04-09
Algebris Investments (US) Inc. 13G · institution new · filed 2026-07-02 6.0% new 832.9k≈ $10.8m 2026-07-02

Fell to 5% or below in the last year: GENDELL JEFFREY L (4.4%, 2026-08-14)

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.

Officers and directors buying vs selling

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

BuyingSelling
10010Q2 24: 0 buyingQ2 24: 6 sellingQ3 24: 0 buyingQ3 24: 5 sellingQ3 24Q4 24: 0 buyingQ4 24: 4 sellingQ1 25: 0 buyingQ1 25: 0 sellingQ1 25Q2 25: 0 buyingQ2 25: 5 sellingQ3 25: 0 buyingQ3 25: 2 sellingQ3 25Q4 25: 0 buyingQ4 25: 0 sellingQ1 26: 0 buyingQ1 26: 0 sellingQ1 26
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q2 20240—6$472.6k—
Q3 20240—5$136.2k—
Q4 20240—4$348.7k—
Q1 20250—0——
Q2 20250—5$169.3k—
Q3 20250—2——
Q4 20250—0——
Q1 20260—0——

None reported in Q1 2026.

Holders, Q1 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 MacKay Shields LLC 0.92% of their portfolio New York, NY 3,066,4343.1m $25.1m $25.1m 0.92% New
2 Philosophy Capital Management LLC 2.44% of their portfolio Alamo, CA 2,551,1282.6m $20.9m $20.9m 2.44% New
3 ADAGE CAPITAL PARTNERS GP, L.L.C. 0.02% of their portfolio Boston, MA 1,355,1491.4m $11.1m $11.1m 0.02% New
4 CastleKnight Management LP 0.44% of their portfolio New York, NY 1,157,9431.2m $9.5m $9.5m 0.44% New
5 ALGEBRIS (UK) LTD 0.47% of their portfolio London, X0 789,895789.9k $6.5m $6.5m 0.47% New
6 GENDELL JEFFREY L 0.09% of their portfolio Greenwich, CT 784,501784.5k $6.4m $6.4m 0.09% New
7 NOMURA HOLDINGS INC 0.03% of their portfolio TOKYO, M0 502,053502.1k $4.1m $4.1m 0.03% New
8 Cygnus Capital Advisors, LLC 2.55% of their portfolio ATLANTA, GA 455,058455.1k $3.7m $3.7m 2.55% New
9 MACKENZIE FINANCIAL CORP 0.00% of their portfolio TORONTO ONTARIO, A6 361,301361.3k $2.6m $2.6m 0.00% New
10 Liberty Mutual Group Asset Management Inc. 0.18% of their portfolio Boston, MA 281,184281.2k $2.3m $2.3m 0.18% New
11 NOMURA ASSET MANAGEMENT CO LTD 0.00% of their portfolio TOKYO, M0 166,237166.2k $1.4m $1.4m 0.00% New
12 SEI INVESTMENTS CO 0.00% of their portfolio OAKS, PA 79,51579.5k $652.0k $652.0k 0.00% New
13 ACR Alpine Capital Research, LLC 0.00% of their portfolio ST. LOUIS, MO 46,50046.5k $279.0k $279.0k 0.00% New
14 PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.00% of their portfolio COLUMBUS, OH 34,87534.9k $286.0k $286.0k 0.00% New
15 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 15,53115.5k $127.4k $127.4k 0.00% New
16 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 465465 $3.8k $3.8k 0.00% New
17 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 465465 $3.8k $3.8k 0.00% New