The number of registered Thoroughbreds for the 4th generation sires on the top sire line pedigree for the registered foals of 2017.
| Sire Name | Registered Thoroughbreds |
|---|---|
| Mr. Prospector | 2697 |
| Northern Dancer | 2644 |
| Storm Bird | 1624 |
| Raise a Native | 1596 |
| Fappiano | 1534 |
| Seattle Slew | 1478 |
| Bold Reasoning | 1231 |
| A.P. Indy | 968 |
| Storm Cat | 923 |
| Vice Regent | 623 |
| Sadler's Wells | 601 |
| Hail to Reason | 552 |
| Siberian Express | 493 |
| Relaunch | 492 |
| Nearctic | 451 |
| Unbridled | 316 |
| Halo | 304 |
| Cryptoclearance | 247 |
| Harlan | 217 |
| Danzig | 210 |
| Roberto | 203 |
| Blushing Groom (FR) | 179 |
| Majestic Light | 179 |
| In Reality | 172 |
| Wavering Monarch | 155 |
| Machiavellian | 146 |
| Caro (IRE) | 129 |
| Hennessy | 126 |
| Icecapade | 121 |
| Raja Baba | 120 |
| Deputy Minister | 113 |
| Minnesota Mac | 109 |
| Buckpasser | 92 |
| Quiet American | 90 |
| Red God | 82 |
| Runaway Groom | 75 |
| Native Dancer | 67 |
| Great Above | 60 |
| Battle Joined | 53 |
| Forty Niner | 50 |
| Fortino II (FR) | 48 |
| Gone West | 48 |
| Damascus | 47 |
| Intentionally | 41 |
| Cormorant | 38 |
| Gulch | 37 |
| Boldnesian | 31 |
| Ack Ack | 28 |
| Skywalker | 23 |
| Literat (GER) | 22 |
| Bailjumper | 21 |
| Dixieland Band | 21 |
| Sword Dancer | 20 |
| Mill Reef | 19 |
| Private Account | 19 |
| Afleet | 16 |
| Buckaroo | 16 |
| Valid Appeal | 15 |
| Never Bend | 11 |
| Niniski | 11 |
| Best Turn | 10 |
| Cee's Tizzy | 8 |
| Nureyev | 8 |
| Ribot | 8 |
| Gold Apollo | 7 |
| His Majesty | 7 |
| Bold Ruler | 6 |
| Speak John | 6 |
| Super Concorde | 6 |
| Conquistador Cielo | 5 |
| Issue of Gold | 5 |
| Riverman | 5 |
| Shirley Heights (GB) | 5 |
| Sovereign Dancer | 5 |
| Clever Trick | 4 |
| Graustark | 4 |
| Jack Sprat | 4 |
| Milkie | 4 |
| Sonny's Solo Halo | 4 |
| Timeless Moment | 4 |
| Turn-to | 4 |
| Birkhahn (GER) | 3 |
| Briartic | 3 |
| Deer Lodge | 3 |
| Gallant Romeo | 3 |
| Good Manners | 3 |
| Hold Your Peace | 3 |
| Is It True | 3 |
| Jester | 3 |
| Majestic Prince | 3 |
| Norcliffe | 3 |
| Princequillo | 3 |
| Round Table | 3 |
| Dance in Time | 2 |
| El Prado (IRE) | 2 |
| Hill Prince | 2 |
| Mansingh | 2 |
| Never Tabled | 2 |
| Nijinsky II | 2 |
| Private Terms | 2 |
| Seeking the Gold | 2 |
| Sharpen Up (GB) | 2 |
| Sunny's Halo | 2 |
| Tom Fool | 2 |
| Tom Rolfe | 2 |
| Alydar | 1 |
| Atan | 1 |
| Az Igazi | 1 |
| Chilly Twist | 1 |
| Dewan | 1 |
| Dschingis Khan (GER) | 1 |
| El Gran Senor | 1 |
| Foolish Pleasure | 1 |
| General (FR) | 1 |
| Guaranteed Gold | 1 |
| Irish Castle | 1 |
| Lorenzaccio | 1 |
| Milkie's Desire | 1 |
| Native Royalty | 1 |
| Pulpit | 1 |
| Secretariat | 1 |
| Sky Classic | 1 |
| Star de Naskra | 1 |
| Stop the Music | 1 |
| Summer Squall | 1 |
| Whiskey Road | 1 |
| Wild Again | 1 |
Source: The Jockey Club
Current through 4/29/2024