ACK Asset Management LLC: ROG (ROG): Quarterly 13F Position History
As of Q1 2026, ACK Asset Management LLC reported 475,000 shares of ROG (ROG), worth $51.0M and representing 6.4% of its 13F equity book. Quarter-over-quarter share count change: + 38,293 (+8.8%) . The position first appeared in Q2 2016 and has been disclosed across 40 13F-HR filings in Pactolio's tracked window.
- 475,000Shares Held (Latest Filing)
- $51.0MReported Market Value (Latest Filing)
- 6.4%Portfolio Weight (% of 13F Equity Book)
- +38,293Quarter-over-Quarter Share Change
- +$11.0MQuarter-over-Quarter Value Change
- 5,905,000Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 40 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 475,000 | +38,293 | +8.8% | $51.0M | 6.4% | $107.3 |
| Q4 2025 | 436,707 | +436,707 | — | $40.0M | 5.0% | $91.6 |
| Q3 2025 | 0 | 0 | — | $0 | 0.0% | — |
| Q2 2025 | 0 | 517,500 | -100.0% | $0 | 0.0% | — |
| Q1 2025 | 517,500 | 62,500 | -10.8% | $34.9M | 5.7% | $67.5 |
| Q4 2024 | 580,000 | 10,000 | -1.7% | $58.9M | 7.9% | $101.6 |
| Q3 2024 | 590,000 | 0 | — | $66.7M | 8.2% | $113.0 |
| Q2 2024 | 590,000 | +70,000 | +13.5% | $71.2M | 8.8% | $120.6 |
| Q1 2024 | 520,000 | +109,800 | +26.8% | $61.7M | 7.2% | $118.7 |
| Q4 2023 | 410,200 | +40,200 | +10.9% | $54.2M | 6.5% | $132.1 |
| Q3 2023 | 370,000 | 5,535,000 | -93.7% | $48.6M | 7.1% | $131.5 |
| Q2 2023 | 5,905,000 | +5,535,000 | +1495.9% | $22.6M | 2.8% | $3.8 |
| Q1 2023 | 370,000 | 0 | — | $60.5M | 9.2% | $163.4 |
| Q4 2022 | 370,000 | +370,000 | — | $44.2M | 8.1% | $119.3 |
| Q3 2022 | 0 | 0 | — | $0 | 0.0% | — |
| Q2 2022 | 0 | 0 | — | $0 | 0.0% | — |
| Q1 2022 | 0 | 0 | — | $0 | 0.0% | — |
| Q4 2021 | 0 | 189,700 | -100.0% | $0 | 0.0% | — |
| Q3 2021 | 189,700 | 1,300 | -0.7% | $24.6M | 7.2% | $129.6 |
| Q2 2021 | 191,000 | 0 | — | $21.0M | 7.7% | $109.9 |
| Q1 2021 | 191,000 | 10,000 | -5.0% | $20.5M | 8.1% | $107.2 |
| Q4 2020 | 201,000 | +42,212 | +26.6% | $21.6M | 8.9% | $107.5 |
| Q3 2020 | 158,788 | 13,600 | -7.9% | $17.1M | 8.8% | $108.0 |
| Q2 2020 | 172,388 | 17,612 | -9.3% | $18.7M | 8.5% | $108.6 |
| Q1 2020 | 190,000 | +190,000 | — | $21.9M | 10.9% | $115.1 |
| Q4 2019 | 0 | 0 | — | $0 | 0.0% | — |
| Q3 2019 | 0 | 0 | — | $0 | 0.0% | — |
| Q2 2019 | 0 | 203,500 | -100.0% | $0 | 0.0% | — |
| Q1 2019 | 203,500 | +98,500 | +93.8% | $27.1M | 7.5% | $133.2 |
| Q4 2018 | 105,000 | 125,000 | -54.3% | $11.8M | 4.0% | $112.6 |
| Q3 2018 | 230,000 | +20,000 | +9.5% | $33.9M | 9.3% | $147.3 |
| Q2 2018 | 210,000 | +210,000 | — | $24.2M | 6.5% | $115.1 |
| Q1 2018 | 0 | 55,685 | -100.0% | $0 | 0.0% | — |
| Q4 2017 | 55,685 | 84,315 | -60.2% | $9.0M | 2.0% | $161.9 |
| Q3 2017 | 140,000 | 134,200 | -48.9% | $18.7M | 5.2% | $133.3 |
| Q2 2017 | 274,200 | 110,800 | -28.8% | $29.8M | 6.7% | $108.6 |
| Q1 2017 | 385,000 | +140,000 | +57.1% | $28.3M | 8.4% | $73.5 |
| Q4 2016 | 245,000 | 75,000 | -23.4% | $18.8M | 5.5% | $76.8 |
| Q3 2016 | 320,000 | +40,000 | +14.3% | $19.5M | 5.9% | $61.1 |
| Q2 2016 | 280,000 | — | — | $17.1M | 5.1% | $61.1 |
Methodology & FAQ
How This Position History Is Sourced
Each row is one SEC Form 13F-HR filing disclosing this position. Share count, market value, and reported quarter are taken verbatim from the filing; portfolio weight is recomputed against the same filing's total reported equity book. Implied price-per-share is market value divided by shares — a quarter-end mark, not the manager's cost basis. See the full methodology document for the normalization rules.
When did ACK Asset Management LLC first disclose a ROG position in 13F-HR filings?
ACK Asset Management LLC first reported ROG (ROG) on its 13F-HR filing for the period ending 2016-06-30 (Q2 2016). The position has appeared on 40 reported quarters within Pactolio's tracked window.
What was ACK Asset Management LLC's most recent quarter-over-quarter share-count change in ROG?
Between Q4 2025 and Q1 2026, ACK Asset Management LLC added 38,293 shares of ROG (+8.8%), bringing the total reported position to 475,000 shares at a market value of $51.0M.
Does the implied price-per-share represent ACK Asset Management LLC's cost basis in ROG?
No. The implied price-per-share column is the 13F-HR reported market value divided by reported share count on the filing date (end of quarter). It is a quarter-end mark, not a cost basis or transaction price. Use it as a sanity check on the value column, not as an indicator of the manager's entry or exit price.