WESTFIELD CAPITAL MANAGEMENT CO LP
Position in ROK — Rockwell Automation, Inc
CIK 1177719
BOSTON, MA
Position in ROK
as of Jun 30, 2026
· filed Aug 12, 2026
Position Value
$117,401,290
+$43,372,601 QoQ
Shares Held
237,136
+15.0% QoQ
Ownership
0.214%
of shares outstanding
% of Portfolio
0.39%
of 13F equity value
Holder Rank
#67
of 1,527 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority
Sole 81%
Shared 0%
None 19%
Common Shares in ROK Over Time
Shares Held
Position Value (USD)
Position in Specialty Industrial Machinery
Industrials · as of Jun 30, 2026WESTFIELD CAPITAL MANAGEMENT CO LP holds $1,186,816,315 across 9 Specialty Industrial Machinery names. ROK ranks #5 (9.9% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | GEV |
GE Vernova Inc.
|
241,272 | $283,460,821 | |
| 2 | RRX |
Regal Rexnord Corp
|
856,976 | $204,123,113 | |
| 3 | AME |
Ametek Inc/
|
723,798 | $175,115,688 | |
| 4 | ITT |
Itt Inc.
|
830,382 | $164,216,344 | |
| 5 | ROK |
Rockwell Automation, Inc
This page
|
237,136 | $117,401,290 | |
| 6 | IEX |
Idex Corp /De/
|
513,564 | $116,553,349 | |
| 7 | NPO |
Enpro Inc.
|
286,554 | $108,010,799 | |
| 8 | CMI |
Cummins Inc
|
15,389 | $10,975,588 |
All Filings in ROK
Export CSV
26 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $117,401,290 | 237,136 | Shares | Sole | 2026-08-12 | |
| 2026-03-31 | $74,028,689 | 206,277 | Shares | Sole | 2026-05-11 | |
| 2025-12-31 | $90,962,620 | 233,795 | Shares | Sole | 2026-02-11 | |
| 2025-09-30 | $71,421,212 | 204,335 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $71,310,255 | 214,680 | Shares | Sole | 2025-08-12 | |
| 2025-03-31 | $56,807,426 | 219,860 | Shares | Sole | 2025-05-09 | |
| 2024-12-31 | $63,259,616 | 221,350 | Shares | Sole | 2025-02-11 | |
| 2024-09-30 | $61,493,179 | 229,059 | Shares | Sole | 2024-11-12 | |
| 2024-06-30 | $81,528,576 | 296,166 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $88,676,190 | 304,384 | Shares | Sole | 2024-05-10 | |
| 2023-12-31 | $96,700,237 | 311,454 | Shares | Sole | 2024-02-09 | |
| 2023-09-30 | $86,711,231 | 303,324 | Shares | Sole | 2023-11-13 | |
| 2023-06-30 | $103,537,239 | 314,273 | Shares | Sole | 2023-08-11 | |
| 2023-03-31 | $94,567,783 | 322,262 | Shares | Sole | 2023-05-12 | |
| 2022-12-31 | $83,785,202 | 325,291 | Shares | Sole | 2023-02-13 | |
| 2022-09-30 | $68,998,683 | 320,760 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $62,878,119 | 315,479 | Shares | Sole | 2022-08-12 | |
| 2022-03-31 | $77,698,243 | 277,464 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 | $82,914,668 | 237,680 | Shares | Sole | 2022-02-10 | |
| 2021-09-30 | $71,880,724 | 244,459 | Shares | Sole | 2021-11-12 | |
| 2021-06-30 | $75,789,579 | 264,980 | Shares | Sole | 2021-08-10 | |
| 2021-03-31 | $87,540,253 | 329,793 | Shares | Sole | 2021-05-14 | |
| 2020-12-31 | $120,516,462 | 480,509 | Shares | Sole | 2021-02-12 | |
| 2020-09-30 | $96,663,798 | 438,027 | Shares | Sole | 2020-11-13 | |
| 2020-06-30 | $86,611,338 | 406,626 | Shares | Sole | 2020-08-13 | |
| 2020-03-31 | $46,065,428 | 305,251 | Shares | Sole | 2020-05-14 | |
| No filing history on record for this holder in this stock. | ||||||