Ticker · CUSIP 258278100
Holders (tracked)
11
Combined shares
1,705,283
Combined value
$147.18M
Last close
$106.21
Quarter
2025Q4
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
Price is +23.1% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
21 events
- T. Rowe Price trimmed2026-02-17−152,541 shares · 2025Q413F
- Ken Griffin (Citadel Advisors) exited2026-02-17−55,972 shares · 2025Q413F
- D.E. Shaw & Co. added2026-02-17+18,687 shares · 2025Q413F
- AQR Capital Management trimmed2026-02-17−232 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−48,485 shares · 2025Q413F
- Wellington Management added2026-02-17+40,928 shares · 2025Q413F
- Ray Dalio (Bridgewater Associates) added2026-02-13+11,190 shares · 2025Q413F
- Renaissance Technologies added2026-02-12+4,500 shares · 2025Q413F
- Norges Bank (Norway SWF) opened position2026-02-10+336,784 shares · 2025Q413F
- +73,342 shares · 2025Q413F
- −22,398 shares · 2025Q313F
- Izzy Englander (Millennium Mgmt) added2025-11-14+84,465 shares · 2025Q313F
- Steve Cohen (Point72) exited2025-11-14−1,735 shares · 2025Q313F
- D.E. Shaw & Co. trimmed2025-11-14−16,295 shares · 2025Q313F
- T. Rowe Price added2025-11-14+393,886 shares · 2025Q313F
- Wellington Management trimmed2025-11-14−81,799 shares · 2025Q313F
- AQR Capital Management added2025-11-14+1,814 shares · 2025Q313F
- Renaissance Technologies trimmed2025-11-13−18,700 shares · 2025Q313F
- Norges Bank (Norway SWF) exited2025-11-13−329,738 shares · 2025Q313F
- +4,116 shares · 2025Q313F
- Norges Bank (Norway SWF) added2025-11-12+10,363 shares · 2024Q313F
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of DORM…
Cost basis inferred from 13F share-delta history. Sorted by % return on the position they're still holding.
| Investor | First in | Cost basis | Return | Position value today |
|---|---|---|---|---|
| T. Rowe Price | 2016Q1 | $1.84 | +5663.6% | $54.3M |
| Norges Bank (Norway SWF) | 2016Q1 | $80.89 | +31.3% | $35.8M |
| Renaissance Technologies | 2017Q4 | $106.80 | -0.6% | $9.8M |
| AQR Capital Management | 2016Q2 | $115.91 | -8.4% | $605K |
| Wellington Management | 2017Q3 | $120.16 | -11.6% | $53.9M |
| D.E. Shaw & Co. | 2017Q1 | $120.50 | -11.9% | $10.8M |
| First Eagle Investment Management | 2025Q4 | $123.19 | -13.8% | $7.8M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $129.51 | -18.0% | $935K |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $129.51 | -18.0% | $935K |
| Ray Dalio (Bridgewater Associates) | 2025Q3 | $131.98 | -19.5% | $1.6M |
| Izzy Englander (Millennium Mgmt) | 2016Q2 | $149.13 | -28.8% | $5.4M |
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions2
- Norges Bank (Norway SWF)+336,784$41.5M
- First Eagle Investment Management+73,342$9.0M
Added to4
- Wellington Management+40,928$5.0M
- D.E. Shaw & Co.+18,687$2.3M
- Ray Dalio (Bridgewater Associates)+11,190$1.4M
- Renaissance Technologies+4,500$554K
Trimmed3
- Izzy Englander (Millennium Mgmt)−48,485$6.0M
- AQR Capital Management−232$29K
- T. Rowe Price−152,541$19K
Exited1
- Ken Griffin (Citadel Advisors)−55,972$8.7M
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 11 | $22.52B |
| 2022Q2 | 10 | $25.96B |
| 2022Q3 | 9 | $22.6M |
| 2022Q4 | 10 | $374.8M |
| 2023Q1 | 11 | $396.5M |
| 2023Q2 | 9 | $363.9M |
| 2023Q3 | 10 | $355.9M |
| 2023Q4 | 8 | $388.5M |
| 2024Q1 | 10 | $446.3M |
| 2024Q2 | 10 | $414.9M |
| 2024Q3 | 9 | $51.5M |
| 2024Q4 | 9 | $57.8M |
| 2025Q1 | 11 | $90.6M |
| 2025Q2 | 12 | $144.0M |
| 2025Q3 | 10 | $125.6M |
| 2025Q4 | 11 | $147.2M |
Who owns DORM
11 super-investors · 2025Q4
Tracked stake
1.71M
shares
Combined value
$147M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New2Added4Trim3Sold2
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Wellington Management | 507.7K | $63M |
| 2 | Norges Bank Norway SWF | 336.8K | $41M |
| 3 | D.E. Shaw & Co. | 101.5K | $13M |
| 4 | Renaissance Technologies | 91.9K | $11M |
| 5 | First Eagle Investment Management | 73.3K | $9M |
| 6 | Izzy Englander Millennium Mgmt | 50.4K | $6M |
| 7 | Ray Dalio Bridgewater Associates | 15.3K | $2M |
| 8 | Ken Griffin Citadel Advisors | 8.8K | $1M |
| 9 | AQR Capital Management | 5.7K | $702K |
| 10 | Ken Griffin Citadel Advisors | 2.8K | $345K |
| 11 | T. Rowe Price | 511.1K | $63K |
Recent moves
20 transactions
- +40,928 · 2025Q4
- TRIMT. Rowe Price−152,541 · 2025Q4
- −55,972 · 2025Q4
- −232 · 2025Q4
- +18,687 · 2025Q4
- −48,485 · 2025Q4
- +11,190 · 2025Q4
- +4,500 · 2025Q4
- +336,784 · 2025Q4
- +73,342 · 2025Q4
- −22,398 · 2025Q3
- −1,735 · 2025Q3
- −81,799 · 2025Q3
- +1,814 · 2025Q3
- TRIMD.E. Shaw & Co.−16,295 · 2025Q3
- +393,886 · 2025Q3
- +84,465 · 2025Q3
- −329,738 · 2025Q3
- +4,116 · 2025Q3
- −18,700 · 2025Q3
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