73% of the top 30 NM$ bulls. One breeding program. The December 2025 Holstein evaluations just rewrote the genetic playbook.

Executive Summary: The December 2025 US Holstein genetic evaluations expose a seismic shift: Genosource now owns 22 of the top 30 Net Merit bulls—73% of the industry’s elite profit genetics under one roof. GENOSOURCE RETROSPECT-ET defends the #1 NM$ position at $1296, while BEYOND HI-LEVEL-ET commands GTPI at 3612, a 73-point jump that widens the gap at the top. Newcomer SAN-DAN ON CALL-ET exploded onto the scene at #3 GTPI (3574) with production numbers that demand attention: 1845 Milk, 151 Fat, 70 Protein. Type leadership remains locked between SHG LEGO and REDCARPET STORY ARC-ET at 3.85 PTAT, while Red & White genetics surge forward with SIEMERS RLE PAPAYA-RED-ET topping at 3221 GTPI. The consolidation of profitable genetics into a single program isn’t a trend—it’s the new reality, and breeders who adapt their sire selection now will compound this advantage for generations.

Dairy breeders and industry professionals, welcome to our analysis of the December 2025 US Holstein Genetic Evaluations. This round of evaluations saw numerous high-ranking newcomers and shifts among the established leaders across the major indices, underscoring the continued rapid turnover in elite genomic performance.

GTPI (Genomic Total Performance Index) Highlights

The December 2025 evaluations present a highly competitive Top 100 GTPI list for bulls over 12 months with NAAB codes, with significant consolidation among the leading bull providers.

Top Movers and Shakers

BEYOND HI-LEVEL-ET maintains its position as the #1 GTPI bull overall, posting a GTPI of 3612. The bull demonstrates strong production credentials with 1121 PTA Milk, 145 PTA Fat, and 59 PTA Protein, combined with a solid Health Index of 6.5.

The top of the list saw considerable shifting:

• BEYOND SHPSTR GOLLEY-ET made a major move to the #2 position in December, reaching 3605 GTPI. This sire excels with high PTA Fat (147) and strong PTA Type (1.51).
• SAN-DAN ON CALL-ET (3574 GTPI) enters the top rankings directly at #3. This sire is exceptional for production, yielding 1845 PTA Milk, 151 PTA Fat, and 70 PTA Protein, while also ranking #9 for Net Merit at $1222.
• OCD TROOPER SHEEPSTER-ET (3572 GTPI) now stands at #4 in the general Top 100 GTPI ranking.
• PROGENESIS WATCHMAN rounds out the top five at 3568 GTPI.
• BEYOND HI-PACE-ET secures #6 with 3566 GTPI, adding depth to the Beyond program’s GTPI dominance.

New Sires in the GTPI Top 100

The December 2025 GTPI ranking features numerous exciting new entrants that cracked the Top 100. Key new sires debuting near the top include:

• S-S-I OLD RICHARD-ET ranks high at #7 with 3553 GTPI
• S-S-I SIEMERS N MCLAURIN-ET follows closely at #8 with 3549 GTPI, showing impressive PTA Type (1.81) and Udder Composite (1.16)
• STGEN MAZOR-ET (3539 GTPI) and GENOSOURCE LANDMAN-ET (3537 GTPI) secured the #11 and #12 spots, respectively
• BEYOND HOORAY-ET also debuts strongly at #13 (3537 GTPI)
• GENOSOURCE YAGERMEISTER-ET at #16 (3533 GTPI) and OCD SHEEPSTER ROCK-ET at #17 (3528 GTPI)

Net Merit ($NM) Evaluation Overview

The December 2025 Net Merit rankings reveal a seismic shift in genetic leadership that dairy breeders cannot ignore: Genosource bulls now hold an astounding 22 of the top 30 NM$ positions—representing 73% of the elite profitability tier. Even more remarkably, Genosource claims 5 of the top 7 spots, including the #1 position.

This level of concentration is unprecedented in modern Holstein genetics and signals a fundamental change in how profitable genetics are being developed and marketed. The Genosource breeding program has clearly cracked the code on balancing high production with health, fertility, and longevity traits that drive lifetime profitability.

NM$ Leaders

GENOSOURCE RETROSPECT-ET successfully defends its title as the #1 NM$ bull, achieving $1296 NM. This bull also appears at #87 on the GTPI list with a GTPI of 3477, demonstrating balanced genetic merit across multiple selection indices.

The Genosource dominance continues throughout the rankings:

• 551HO06566 is the #2 NM$ sire at $1274 NM, featuring 2089 PTA Milk and 77 PTA Protein
• STGEN STUART-ET ranks #3 NM$ at $1250 NM, providing 1666 PTA Milk, 145 PTA Fat, and 71 PTA Protein
• GENOSOURCE MIKAIL-ET holds the #4 NM$ position with $1246 NM
• GENOSOURCE ELVIS-ET at #5 with $1245 NM
• GENOSOURCE VAMOOSE-ET at #6 with $1231 NM
• GENOSOURCE ENDURANCE-ET at #7 with $1227 NM

Production Powerhouses in the NM$ Rankings

Many of the top NM$ bulls exhibit high combined Fat and Protein (CFP) figures, which are vital for milk component revenue. Notable examples include:

• GENOSOURCE BENCHMARK-ET (NM $1207, #11) boasts the highest CFP among the top NM sires at 228
• SAN-DAN ON CALL-ET, ranking #9 NM$ with $1222, delivers 221 CFP from 1845 PTA Milk
• GENOSOURCE YUPPIE-ET (#27 NM$) showcases extreme production at 2662 PTA Milk, ranking high despite challenging functional traits, including Productive Life of -0.3 and Daughter Pregnancy Rate of -3.0

PTAT (Prediction of Transmitting Ability for Type) Focus

The December 2025 PTAT list features sires that transmit superior conformation and functional type.

PTAT Top Performers

The top two sires continue their dominance:

• SHG LEGO remains #1 with 3.85 PTAT
• REDCARPET STORY ARC-ET holds #2 with 3.85 PTAT

For breeders prioritizing show ring success or building maternal lines with exceptional udder quality, the stability at the top provides confidence—these proven type transmitters aren’t going anywhere. No emerging challenger has broken 3.75 PTAT, meaning the path to elite conformation genetics remains clearly defined.

Key Shifts and New Additions in the PTAT Top 50

• STONE-FRONT EYECANDY APOLLO holds steady at #3 with 3.73 PTAT
• GENOSOURCE SEENOFEAR-ET is a new, high-ranking entrant at #4 with 3.70 PTAT
• ESKDALE HULU SHOUTOUT-ET (3.59 PTAT) secured the #8 spot
• LAND-PRIDE UNBEATABULL-ET debuts at #19 with 3.38 PTAT
• DG SANTINUS RC is a high-ranking newcomer at #20 (3.37 PTAT)
• LE-O-LA CHISEL-ET secured #27 (3.30 PTAT)
• COLDSPRINGS LAURENT 9901-ET debuted at #47 (3.14 PTAT)

Red Carrier and Red & White Genetic Leaders

Red Carrier (RC) GTPI

The Red Carrier list shows strong genetic progress at the elite level:

• S-S-I SIEMERS FALCIFORM-ET maintains the #1 RC GTPI position at 3353, demonstrating a strong Health Index (5.8) and high Daughter Pregnancy Rate (DPR 2.1)
• OCD DOMINANCE SUNDAY-ET holds steady at #2 with 3315 GTPI
• The newcomer 551HO06476 enters at #3 (3302 GTPI)
• New sires penetrating the Top 50 include 582891323034-ET (#5, 3276 GTPI) and STGEN GUDO P-ET (#7, 3264 GTPI)

Red & White (R&W) GTPI

The R&W GTPI rankings remain dynamic with multiple new entrants:

• SIEMERS RLE PAPAYA-RED-ET is the #1 R&W GTPI bull at 3221 GTPI
• DENOVO 21873 OKAFOR-RED-ET debuts strongly at #2 (3220 GTPI)
• STGEN OCEAN-RED-ET is the #3 R&W GTPI bull at 3198 GTPI
• GENOSOURCE MORRIS-RED-ET holds the #9 position at 3164 GTPI
• New sires APRILDAY ORPH LYON-RED-ET (#5, 3182 GTPI) and STGEN RED LION-ET (#7, 3166 GTPI) mark strong debuts

The 391-point gap between SIEMERS RLE PAPAYA-RED-ET (3221) and BEYOND HI-LEVEL-ET (3612) represents the closest Red & White genetics have come to elite black & white performance in recent memory—a milestone that validates years of focused colored cattle breeding.

Red Carrier and R&W PTAT

In the Type rankings for colored cattle, REDCARPET STORY ARC-ET remains the dominant sire, leading the combined R&W and Red Carrier PTAT list at 3.85 PTAT. Other notable performers include:

• ESKDALE HULU SHOUTOUT-ET makes a powerful entrance at #2 with 3.59 PTAT
• DG SANTINUS RC debuts at #3 with 3.37 PTAT
• LE-O-LA CHISEL-ET debuts at #5 with 3.30 PTAT
• SKI-BRITE JOEL-RED-ET debuts in the Top 50 at #43 (2.66 PTAT)

The Bottom Line

This consolidation of profitable genetics demands a strategic response. Review your current sire lineup against these rankings and ask: Does your genetic strategy align with where profitability is actually being generated? Whether you prioritize NM$, GTPI, type, or colored genetics, the December 2025 evaluations provide clear direction—and clear leaders—in every category.

Key Takeaways

• Profit genetics monopolized: Genosource captures 22 of 30 top Net Merit positions—73% of the industry’s most profitable sires now come from one program, led by RETROSPECT-ET at $1296
• GTPI leadership extends: BEYOND HI-LEVEL-ET dominates at 3612; newcomer SAN-DAN ON CALL-ET explodes to #3 (3574) with 1845 Milk, 151 Fat, and dual ranking at #9 NM$
• Type titans hold firm: SHG LEGO and REDCARPET STORY ARC-ET lock the PTAT summit at 3.85—no emerging challenger breaks 3.75
• Red & White within striking distance: SIEMERS RLE PAPAYA-RED-ET reaches 3221 GTPI, closing the gap to just 391 points behind the #1 overall bull

Complete Lists:

• USA – GTPI – >12 months & NAAB-code – 12/25
• USA – Net Merit – >12 months & NAAB-code – 12/25
• USA – PTAT Bulls = >12 Months – 12/25
• USA | Top *RC GTPI >12 months & NAAB-code 12/25
• USA | Top R&W GTPI >12 months & NAAB-code 12/25
• USA | Top R&W & *RC PTAT Bulls >12 Mths – 12/25

Data source: Council on Dairy Cattle Breeding (CDCB), December 2025 genetic evaluations. All rankings reflect bulls with NAAB codes over 12 months.

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