Ramaco Resources Inc. Class A press release

NexGen Intersects Continuous and Strong High-Grade Mineralization in all of the Initial A2 Sub-Zone Targets from Feasibility Stage Drilling

2019-03-28

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Canada NewsWire

VANCOUVER, March 28, 2019

VANCOUVER, March 28, 2019/CNW/ -NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE, NYSE MKT: NXE)is pleased to report radioactivity results for the first twenty holes comprising 8,216.5 mfrom the Company's first phase of Feasibility-stage drilling program at our 100% owned, Rook I property in the AthabascaBasin Saskatchewan.

Highlights:

Objective I: Conversion of Indicated to Measured in the A2 Sub-Zone

Nineteen targets have been successfully intersected within the A2 Sub-Zone. This current phase of the program focuses on targets intersected at a spacing between 9.0 mand 16.7 m(based on geostatistical data spacing report compiled by Clayton V. Deutschfrom Resource Modeling Solutions) for Indicated Mineral Resources to be elevated to a Measured Mineral Resource classification. All drill holes intersected the target between -55° and -60° utilizing the latest in directional drilling technology.

The highlights below include composite and off-scale radioactivity results from the A2 Shear only, for radioactivity results for the entire hole see Table 1: Arrow Deposit Drill Hole Data.

AR-19-225c1 intersected 38.0 mof total composite mineralizationincluding 10.15 mof total composite off-scale radioactivity(>10,000 to >61,000 cps) within a 91.0 msection (529.0 to 620.0 m) in the A2 Sub-Zone. Additionally, of the 10.15 mof off-scale mineralization intersected in the hole 7.0 mof massive-to-semi massive pitchblende with minimum-greater-than-61,000 cps. AR-19-224c1 intersected 37.5 mof total composite mineralizationincluding 10.8 mof total composite off-scale radioactivity(>10,000 to >61,000 cps) within a 97.0 msection (496.0 to 593.0 m) in the A2 Sub-Zone. Additionally, of the 10.8 mof off-scale mineralization intersected in the hole 4.0 mof massive-to-semi massive pitchblende with minimum-greater-than-61,000 cps. AR-19-224c2 intersected 47.0 mof total composite mineralizationincluding 12.55 mof total composite off-scale radioactivity(>10,000 to >61,000 cps) within a 98.0 msection (453.0 to 551.0 m) in the A2 Sub-Zone. Additionally, of the 12.55 mof off-scale mineralization intersected in the hole 3.0 mof massive-to-semi massive pitchblende with minimum-greater-than-61,000 cps. AR-19-225c2 intersected35.0 mof total composite mineralization including11.05 mof total composite off-scale radioactivity (>10,000 to >61,000 cps) within a 92.0 msection (540.0 to 632.0 m) in the A2 Sub-Zone. Additionally, of the 11.05 mof off-scale mineralization intersected in the hole1.5 mof massive-to-semi massive pitchblende with minimum-greater-than-61,000 cps. AR-19-223c2intersected 43.5 mof total composite mineralizationincluding 5.5 mof total composite off-scale radioactivity(>10,000 to >61,000 cps) within a 97.0 msection (486.0 to 583.0 m) in the A2 Sub-Zone. Additionally, of the 5.5 mof off-scale mineralization intersected in the hole 1.5 mof massive-to-semi massive pitchblende with minimum-greater-than-61,000 cps. AR-19-227c2 intersected 54.0 mof total composite mineralizationincluding 9.75 mof total composite off-scale radioactivity(>10,000 to >61,000 cps) within a 98.0 msection (419.0 to 517.0 m) in the A2 Sub-Zone. Additionally, of the 9.75 mof off-scale mineralization intersected in the hole 0.5 mof massive-to-semi massive pitchblende with minimum-greater-than-61,000 cps. AR-19-228c1 intersected 36.0 mof total composite mineralizationincluding 4.25 mof total composite off-scale radioactivity(>10,000 to >61,000 cps) within an 87.0 msection (569.0 to 656.0 m) in the A2 Sub-Zone. Additionally, of the 4.25 mof off-scale mineralization intersected in the hole 0.5 mof massive-to-semi massive pitchblende with minimum-greater-than-61,000 cps. AR-19-226c1 intersected 46.0 mof total composite mineralizationincluding 6.4 mof total composite off-scale radioactivity(>10,000 to >61,000 cps) within a 100.0 msection (447.0 to 547.0 m) in the A2 Sub-Zone. AR-19-233c2 intersected49.0 mof total composite mineralization including9.45 mof total composite off-scale radioactivity (>10,000 to >61,000 cps) within a 99.0 msection (414.0 to 513.0 m) in the A2 Sub-Zone.

Drill hole locations and schematics are shown in Figures 1 and 2. Drill hole descriptions can be found at www.nexgenenergy.ca

Development, Activities & Financial

Expediting Arrow to Feasibility by initiation of a 2-stage 125,000m(10 rig) high density drilling program that commenced in mid-December 2018to focus on mine optimization plans based on Measured and Indicated mineral resources. The Company has approximately $100 million in the treasurywhich fully funds NexGen for all drilling, feasibility and development programs planned this year.

Leigh Curyer, Chief Executive Officer, commented: "This development focused drilling continually highlights the incredible nature and strength of Arrow in terms of the continuity of high grade uranium. Intersecting the type of mineralization reported in today's release with such regularity is simply unique and continually increases the technical strength of Arrow. We look forward to delivering the results of the 10 rig program throughout 2019."

Troy Boisjoli, Vice-President, Operations and Project Development, commented: "These results demonstrate the confidence in the continuation of high-grade uranium mineralization within the A2 Sub-Zone. This initial release is just the beginning of what will surely be another highly successful 2019 program as the Company moves towards completing the Feasibility Study which will incorporate an updated mineral resource estimate based on the 2019 drill campaign which is the largest in the Company's history."

Table 1: Arrow Deposit Drill Hole Data

| Drill Hole | Athabasca Group - Basement Unconformity Depth (m) | Handheld Scintillometer Results (RS-120) | | | | | | | | Hole ID | Azimuth | Dip | Total Depth (m) | From (m) | To (m) | Width (m) | CPS Range | | | AR-19-221c1 | 327 | -65 | 576 | 129.5 | 432.5 | 433.5 | 1 | <500 - 990 | | | | | | | 442.5 | 446 | 3.5 | <500 - 1100 | | | | | | | 448.5 | 449 | 0.5 | <500 - 620 | | | | | | | 478.5 | 479.5 | 1 | <500 - 580 | | | | | | | 485 | 486 | 1 | <500 - 780 | | | | | | | 495.5 | 497.5 | 2 | <500 - 1340 | | | | | | | 506.5 | 507 | 0.5 | <500 - 670 | | | | | | | 511 | 517.5 | 6.5 | <500 - 2200 | | | | | | | 524.5 | 549 | 24.5 | <500 - 61000 | | | | | | | 554.5 | 555 | 0.5 | <500 - 1180 | | AR-19-221c2 | 327 | -65 | 597.5 | N/A | 426.5 | 430.5 | 4 | <500 - 2100 | | | | | | | 437.5 | 438 | 0.5 | <500 - 680 | | | | | | | 484 | 484.5 | 0.5 | <500 - 1100 | | | | | | | 495.5 | 501 | 5.5 | <500 - 1000 | | | | | | | 506 | 522.5 | 16.5 | <500 - 1500 | | | | | | | 540 | 559.5 | 19.5 | <500 - 61000 | | | | | | | 562 | 562.5 | 0.5 | <500 - 1200 | | | | | | | 591.5 | 592 | 0.5 | <500 - 550 | | AR-19-222c1 | 327 | -65 | 597.5 | 133.45 | 401.5 | 404 | 2.5 | <500 - 1400 | | | | | | | 422 | 425.5 | 3.5 | <500 - 2600 | | | | | | | 437.5 | 439 | 1.5 | <500 - 10800 | | | | | | | 447 | 447.5 | 0.5 | <500 - 1000 | | | | | | | 450.5 | 482 | 31.5 | <500 - 7400 | | | | | | | 494.5 | 551 | 56.5 | <500 - 61000 | | | | | | | 557.5 | 559 | 1.5 | <500 - 3720 | | | | | | | 577 | 577.5 | 0.5 | <500 - 560 | | AR-19-222c2 | 327 | -65 | 594 | N/A | 412.5 | 413 | 0.5 | <500 - 1100 | | | | | | | 417.5 | 418 | 0.5 | <500 - 2800 | | | | | | | 433 | 437.5 | 4.5 | <500 - 1350 | | | | | | | 443.5 | 453.5 | 10 | <500 - 32000 | | | | | | | 456 | 457.5 | 1.5 | <500 - 2100 | | | | | | | 461.5 | 463 | 1.5 | <500 - 3000 | | | | | | | 466 | 471 | 5 | <500 - 6900 | | | | | | | 474.5 | 478 | 3.5 | <500 - 1600 | | | | | | | 480.5 | 490 | 9.5 | <500 - 1150 | | | | | | | 492.5 | 493 | 0.5 | <500 - 1250 | | | | | | | 497 | 523 | 26 | <500 - 61000 | | | | | | | 528.5 | 538.5 | 10 | <500 - 37000 | | | | | | | 543.5 | 546.5 | 3 | <500 - 18600 | | AR-19-223c1 | 327 | -65 | 588 | 133.6 | 435 | 438.5 | 3.5 | <500 - 1300 | | | | | | | 446 | 449.5 | 3.5 | <500 - 2700 | | | | | | | 453 | 460 | 7 | <500 - 6900 | | | | | | | 464.5 | 468 | 3.5 | <500 - 3800 | | | | | | | 474 | 476.5 | 2.5 | <500 - 1400 | | | | | | | 485.5 | 486 | 0.5 | 900 - 1280 | | | | | | | 490 | 495.5 | 5.5 | <500 - 5500 | | | | | | | 498.5 | 503.5 | 5 | <500 - 1380 | | | | | | | 509.5 | 519.5 | 10 | <500 - 3000 | | | | | | | 522.5 | 528.5 | 6 | <500 - 1300 | | | | | | | 532 | 549 | 17 | <500 - 61000 | | | | | | | 553 | 556.5 | 3.5 | <500 - 3800 | | | | | | | 559 | 560.5 | 1.5 | <500 - 4300 | | | | | | | 569 | 570.5 | 1.5 | <500 - 1600 | | AR-19-223c2 | 327 | -65 | 615.5 | N/A | 434.5 | 438 | 3.5 | <500 - 640 | | | | | | | 444.5 | 446 | 1.5 | <500 - 1000 | | | | | | | 451.5 | 453 | 1.5 | <500 - 1700 | | | | | | | 455.5 | 462 | 6.5 | <500 - 17000 | | | | | | | 466.5 | 467.5 | 1 | <500 - 2800 | | | | | | | 473 | 475 | 2 | <500 - 740 | | | | | | | 479 | 483.5 | 4.5 | <500 - 560 | | | | | | | 488 | 491 | 3 | <500 - 1500 | | | | | | | 499 | 502 | 3 | <500 - 1000 | | | | | | | 508.5 | 515 | 6.5 | <500 - 3300 | | | | | | | 539.5 | 552.5 | 13 | <500 - 61000 | | | | | | | 555 | 558 | 3 | <500 - 34200 | | | | | | | 565 | 572 | 7 | <500 - 31000 | | | | | | | 574.5 | 576 | 1.5 | <500 - 870 | | AR-19-223c3 | 327 | -65 | 586.5 | N/A | 417.5 | 418 | 0.5 | <500 - 700 | | | | | | | 425 | 426 | 1 | <500 - 920 | | | | | | | 435 | 444.5 | 9.5 | <500 - 6900 | | | | | | | 452 | 459.5 | 7.5 | <500 - 3300 | | | | | | | 462.5 | 465 | 2.5 | <500 - 1100 | | | | | | | 468.5 | 470.5 | 2 | <500 - 660 | | | | | | | 473 | 476 | 3 | <500 - 5300 | | | | | | | 485 | 490.5 | 5.5 | <500 - 2400 | | | | | | | 493 | 495 | 2 | <500 - 1450 | | | | | | | 498.5 | 517.5 | 19 | <500 - 7000 | | | | | | | 520 | 523.5 | 3.5 | <500 - 1000 | | | | | | | 527 | 551 | 24 | <500 - 61000 | | | | | | | 559.5 | 566 | 6.5 | <500 - 61000 | | | | | | | 570.5 | 573 | 2.5 | <500 - 670 | | AR-19-224c1 | 327 | -65 | 597.5 | 129.45 | 404 | 404.5 | 0.5 | <500 - 640 | | | | | | | 443.5 | 446.5 | 3 | <500 - 1100 | | | | | | | 449 | 449.5 | 0.5 | <500 - 1080 | | | | | | | 452 | 452.5 | 0.5 | <500 - 640 | | | | | | | 455 | 456 | 1 | <500 - 2050 | | | | | | | 465 | 465.5 | 0.5 | <500 - 1370 | | | | | | | 469.5 | 473.5 | 4 | <500 - 1650 | | | | | | | 497.5 | 500.5 | 3 | <500 - 820 | | | | | | | 503 | 506.5 | 3.5 | <500 - 1040 | | | | | | | 510 | 511 | 1 | <500 - 540 | | | | | | | 524.5 | 525 | 0.5 | <500 - 560 | | | | | | | 530 | 533 | 3 | <500 - 710 | | | | | | | 536.5 | 538 | 1.5 | <500 - 2340 | | | | | | | 543.5 | 544.5 | 1 | <500 - 1270 | | | | | | | 548 | 551 | 3 | <500 - 3610 | | | | | | | 554.5 | 575.5 | 21 | <500 - 61000 | | AR-19-224c2 | 327 | -65 | 612.5 | N/A | 441 | 442.5 | 1.5 | <500 - 1850 | | | | | | | 445 | 447.5 | 2.5 | <500 - 1220 | | | | | | | 450 | 453.5 | 3.5 | <500 - 2350 | | | | | | | 470 | 470.5 | 0.5 | <500 - 520 | | | | | | | 476 | 478.5 | 2.5 | <500 - 4100 | | | | | | | 494 | 503 | 9 | <500 - 2800 | | | | | | | 518 | 518.5 | 0.5 | <500 - 600 | | | | | | | 524 | 524.5 | 0.5 | <500 - 530 | | | | | | | 538 | 571.5 | 33.5 | <500 - 61000 | | | | | | | 582 | 585.5 | 3.5 | <500 - 13000 | | AR-19-225c1 | 327 | -65 | 627.5 | 128.7 | 474 | 474.5 | 0.5 | <500 - 630 | | | | | | | 494.5 | 495 | 0.5 | <500 - 520 | | | | | | | 501 | 505 | 4 | <500 - 4500 | | | | | | | 520.5 | 525 | 4.5 | <500 - 1280 | | | | | | | 531 | 531.5 | 0.5 | <500 - 980 | | | | | | | 545 | 546 | 1 | <500 - 1180 | | | | | | | 566.5 | 598.5 | 32 | <500 - 61000 | | AR-19-225c2 | 327 | -65 | 636.5 | N/A | 473.5 | 474.5 | 1 | <500 - 900 | | | | | | | 479.5 | 480.5 | 1 | <500 - 2000 | | | | | | | 563.5 | 593.5 | 30 | <500 - 61000 | | | | | | | 596 | 598 | 2 | <500 - 21000 | | | | | | | 602 | 605 | 3 | <500 - 650 | | AR-19-226c1 | 327 | -65 | 564.5 | 131.5 | 446.5 | 447 | 0.5 | <500 - 740 | | | | | | | 457 | 468.5 | 11.5 | <500 - 1350 | | | | | | | 472.5 | 473.5 | 1 | <500 - 2040 | | | | | | | 482.5 | 483 | 0.5 | <500 - 560 | | | | | | | 491.5 | 503.5 | 12 | <500 - 2240 | | | | | | | 506 | 508.5 | 2.5 | <500 - 3540 | | | | | | | 512.5 | 527.5 | 15 | <500 - 61000 | | | | | | | 536.5 | 539.5 | 3 | <500 - 9300 | | AR-19-226c1a | 327 | -65 | 177 | 144.15 | No Anomalous Radioactivity | | | | | AR-19-226c2 | 327 | -65 | 567 | N/A | 453.5 | 454 | 0.5 | <500 - 740 | | | | | | | 457.5 | 458 | 0.5 | <500 - 600 | | | | | | | 463 | 466.5 | 3.5 | <500 - 730 | | | | | | | 474.5 | 475 | 0.5 | <500 - 510 | | | | | | | 489.5 | 492 | 2.5 | <500 - 860 | | | | | | | 497.5 | 522.5 | 25 | <500 - 61000 | | | | | | | 527.5 | 528.5 | 1 | <500 - 1050 | | | | | | | 547 | 548 | 1 | <500 - 2200 | | AR-19-227c1 | 327 | -65 | 525.5 | 138.3 | 442 | 442.5 | 0.5 | <500 - 680 | | | | | | | 445 | 446.5 | 1.5 | <500 - 1200 | | | | | | | 463 | 502.5 | 39.5 | <500 - 61000 | | AR-19-227c2 | 327 | -65 | 540.5 | N/A | 439 | 439.5 | 0.5 | <500 - 720 | | | | | | | 454.5 | 455 | 0.5 | <500 - 860 | | | | | | | 460 | 508.5 | 48.5 | <500 - 61000 | | | | | | | 513 | 517.5 | 4.5 | <500 - 22000 | | AR-19-228c1 | 327 | -65 | 663.5 | 134 | 249 | 249.5 | 0.5 | <500 - 750 | | | | | | | 458 | 477.5 | 19.5 | <500 - 23000 | | | | | | | 480 | 483.5 | 3.5 | <500 - 3510 | | | | | | | 487 | 487.5 | 0.5 | <500 - 3300 | | | | | | | 492 | 492.5 | 0.5 | <500 - 1750 | | | | | | | 505 | 505.5 | 0.5 | <500 - 800 | | | | | | | 512 | 523.5 | 11.5 | <500 - 55300 | | | | | | | 551 | 551.5 | 0.5 | <500 - 650 | | | | | | | 575.5 | 581 | 5.5 | <500 - 1130 | | | | | | | 600.5 | 603 | 2.5 | <500 - 590 | | | | | | | 605.5 | 624.5 | 19 | <500 - 61000 | | | | | | | 629.5 | 632.5 | 3 | <500 - 61000 | | | | | | | 635 | 638 | 3 | <500 - 680 | | | | | | | 646.5 | 649 | 2.5 | <500 - 890 | | | | | | | 660 | 660.5 | 0.5 | <500 - 700 | | AR-19-228c2 | 327 | -65 | 672.5 | N/A | 459.5 | 469.5 | 10 | <500 - 40000 | | | | | | | 472 | 476 | 4 | <500 - 4400 | | | | | | | 478.5 | 481.5 | 3 | <500 - 1500 | | | | | | | 509.5 | 510.5 | 1 | <500 - 9600 | | | | | | | 515 | 534 | 19 | <500 - 50000 | | | | | | | 598 | 599 | 1 | <500 - 750 | | | | | | | 602 | 603 | 1 | <500 - 970 | | | | | | | 605.5 | 610 | 4.5 | <500 - 1300 | | | | | | | 616.5 | 627 | 10.5 | <500 - 61000 | | | | | | | 630 | 634 | 4 | <500 - 8500 | | | | | | | 638 | 639 | 1 | <500 - 1600 | | | | | | | 641.5 | 654.5 | 13 | <500 - 53000 | | | | | | | 658.5 | 659.5 | 1 | <500 - 700 | | AR-19-233c1 | 327 | -65 | 534.5 | 133.7 | 447.5 | 450.5 | 3 | <500 - 3300 | | | | | | | 453.5 | 491.5 | 38 | <500 - 61000 | | | | | | | 495.5 | 501.5 | 6 | <500 - 920 | | AR-19-233c2 | 327 | -65 | 537.5 | N/A | 457 | 465 | 8 | <500 - 2000 | | | | | | | 467.5 | 481.5 | 14 | <500 - 61000 | | | | | | | 484 | 510.5 | 26.5 | <500 - 61000 | | | | | | | 522.5 | 523 | 0.5 | <500 - 920 |

Parameters:

Maximum internal dilution 2.00 mdownhole All depths and intervals are metres downhole, true thicknesses are yet to be determined "Anomalous" means >500 cps (counts per second) total count gamma readings by gamma scintillometer type RS-120 "Off-scale" means >10,000 cps (counts per second) total count gamma readings by gamma scintillometer type RS-120 Where "Min cps" is <500 cps, this refers to local low radiometric zones within the overall radioactive interval Directional drilling has often resulted in mineralization intersected at a more favourable and shallower dip Hole AR-19-226c1a was terminated due to deviation in the overburden

About NexGen

NexGen is a British Columbia corporation with a focus on the acquisition, exploration and development of Canadian uranium projects. NexGen has a highly experienced team of uranium industry professionals with a successful track record in the discovery of uranium deposits and in developing projects through discovery to production. NexGen owns a 100% interest in Rook I, location of the Arrow Deposit in the AthabascaBasin, Saskatchewan, Canadaand a portfolio of prospective uranium exploration projects throughout northwest Saskatchewan. NexGen is the recipient of the PDAC's 2018 Bill Dennis Award and the 2019 Environmental and Social Responsibility Award.

Technical Disclosure

The technical information in this news release with respect to the PFS has been reviewed and approved by Paul O'Hara, P.Eng. of Wood., David Robson, P.Eng., M.B.A., and Jason Cox, P.Eng. of RPA, each of whom is a "qualified person" under National Instrument 43-101 – _Standards of Disclosure for Mineral Projects_("NI-43-101").

The Mineral Resource Estimate was completed by Mr. Mark Mathisen, C.P.G., Senior Geologist at RPA and Mr. David Ross, P.Geo., Director of Resource Estimation and Principal Geologist at RPA. Both are independent Qualified Persons in accordance with the requirements of National Instrument (NI) 43-101 and they have approved the disclosure herein. All other technical information in this news release has been approved by Mr. Troy Boisjoli, Geoscientist Licensee, Vice President – Operations & Project Development for NexGen. Mr. Boisjoli is a qualified person for the purposes of NI 43-101 and has verified the sampling, analytical, and test data underlying the information or opinions contained herein by reviewing original data certificates and monitoring all of the data collection protocols. All other technical information in this news release has been approved by Mr. James Hatley, a Professional Engineer, Senior Vice-President – Project Development for NexGen. Mr. Hatley is a qualified person for the purposes of NI 43-101 and has reviewed the underlying the information or opinions contained herein on mine design.

A technical report in respect to the PFS is filed on SEDAR (www.sedar.com) and EDGAR (www.sec.gov/edgar.shtml) and is available for review on NexGen Energy's website (www.nexgenenergy.ca).

SEC Standards

Estimates of mineralization and other technical information included or referenced in this news release have been prepared in accordance with NI 43-101. The definitions of proven and probable mineral reserves used in NI 43-101 differ from the definitions in SEC Industry Guide 7. Under SEC Industry Guide 7 standards, a "final" or "bankable" feasibility study is required to report reserves, the three-year historical average price is used in any reserve or cash flow analysis to designate reserves and the primary environmental analysis or report must be filed with the appropriate governmental authority. As a result, the reserves reported by the Company in accordance with NI 43-101 may not qualify as "reserves" under SEC standards. In addition, the terms "mineral resource", "measured mineral resource", "indicated mineral resource" and "inferred mineral resource" are defined in and required to be disclosed by NI 43-101; however, these terms are not defined terms under SEC Industry Guide 7 and normally are not permitted to be used in reports and registration statements filed with the SEC. Mineral resources that are not mineral reserves do not have demonstrated economic viability. Investors are cautioned not to assume that any part or all of the mineral deposits in these categories will ever be converted into reserves. "Inferred mineral resources" have a great amount of uncertainty as to their existence, and great uncertainty as to their economic and legal feasibility. It cannot be assumed that all or any part of an inferred mineral resource will ever be upgraded to a higher category. Under Canadian securities laws, estimates of inferred mineral resources may not form the basis of feasibility or pre-feasibility studies, except in rare cases. Additionally, disclosure of "contained pounds" in a resource is permitted disclosure under Canadian securities laws; however, the SEC normally only permits issuers to report mineralization that does not constitute "reserves" by SEC standards as in place tonnage and grade without reference to unit measurements. Accordingly, information contained or referenced in this news release containing descriptions of the Company's mineral deposits may not be comparable to similar information made public by U.S. companies subject to the reporting and disclosure requirements of United Statesfederal securities laws and the rules and regulations thereunder.