Nine Energy Service, Inc. (NINE) ownership: William Monroe 47% · institutions 83% · index and ETF funds 0% (13F 2026-03-31). Insider activity, 90 days: 0 sales, 0 open-market buys. SEC EDGAR first-party data.
| Holder | Shares | Market Value | % Outstanding | Reported |
|---|---|---|---|---|
| Mackay Shields LLC | 3066434.00 | $25.14M | 22.0% | 2026-03-31 |
| Philosophy Capital Management LLC | 2551128.00 | $20.92M | 18.3% | 2026-03-31 |
| Adage Capital Partners Gp, L.l.c. | 1355149.00 | $11.11M | 9.7% | 2026-03-31 |
| CastleKnight Management LP | 1157943.00 | $9.50M | 8.3% | 2026-03-31 |
| Algebris (uk) Ltd | 789895.00 | $6.47M | 5.7% | 2026-03-31 |
| Gendell Jeffrey L | 784501.00 | $6.43M | 5.6% | 2026-03-31 |
| Nomura | 668290.00 | $5.48M | 4.8% | 2026-03-31 |
| Cygnus Capital Advisors, LLC | 455058.00 | $3.73M | 3.3% | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-23 | |
| Sell | null | 2026-05-20 | |
| Sell | null | 2026-05-20 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.