Senator Investment Group LP: DANAHER (DHR): Quarterly 13F Position History
As of Q1 2026, Senator Investment Group LP reported 433,316 shares of DANAHER (DHR), worth $82.2M and representing 3.8% of its 13F equity book. Quarter-over-quarter share count change: + 263,900 (+155.8%) . The position first appeared in Q1 2019 and has been disclosed across 29 13F-HR filings in Pactolio's tracked window.
- 433,316Shares Held (Latest Filing)
- $82.2MReported Market Value (Latest Filing)
- 3.8%Portfolio Weight (% of 13F Equity Book)
- +263,900Quarter-over-Quarter Share Change
- +$43.4MQuarter-over-Quarter Value Change
- 1,200,000Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 29 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 433,316 | +263,900 | +155.8% | $82.2M | 3.8% | $189.6 |
| Q4 2025 | 169,416 | +169,416 | — | $38.8M | 1.6% | $228.9 |
| Q3 2025 | 0 | 0 | — | $0 | 0.0% | — |
| Q2 2025 | 0 | 200,000 | -100.0% | $0 | 0.0% | — |
| Q1 2025 | 200,000 | +200,000 | — | $41.0M | 2.2% | $205.0 |
| Q4 2024 | 0 | 0 | — | $0 | 0.0% | — |
| Q3 2024 | 0 | 0 | — | $0 | 0.0% | — |
| Q2 2024 | 0 | 0 | — | $0 | 0.0% | — |
| Q1 2024 | 0 | 0 | — | $0 | 0.0% | — |
| Q4 2023 | 0 | 0 | — | $0 | 0.0% | — |
| Q3 2023 | 0 | 0 | — | $0 | 0.0% | — |
| Q2 2023 | 0 | 0 | — | $0 | 0.0% | — |
| Q1 2023 | 0 | 250,000 | -100.0% | $0 | 0.0% | — |
| Q4 2022 | 250,000 | +125,000 | +100.0% | $66.4M | 6.0% | $265.4 |
| Q3 2022 | 125,000 | 175,000 | -58.3% | $32.3M | 2.9% | $258.3 |
| Q2 2022 | 300,000 | 300,000 | -50.0% | $76.1M | 5.4% | $253.5 |
| Q1 2022 | 600,000 | +75,000 | +14.3% | $176.0M | 5.5% | $293.3 |
| Q4 2021 | 525,000 | +25,000 | +5.0% | $172.7M | 3.3% | $329.0 |
| Q3 2021 | 500,000 | 0 | — | $152.2M | 2.6% | $304.4 |
| Q2 2021 | 500,000 | +250,000 | +100.0% | $134.2M | 2.5% | $268.4 |
| Q1 2021 | 250,000 | 0 | — | $56.3M | 1.2% | $225.1 |
| Q4 2020 | 250,000 | 150,000 | -37.5% | $55.5M | 1.0% | $222.1 |
| Q3 2020 | 400,000 | 50,000 | -11.1% | $86.1M | 2.5% | $215.3 |
| Q2 2020 | 450,000 | +450,000 | — | $79.6M | 2.8% | $176.8 |
| Q1 2020 | 0 | 0 | — | $0 | 0.0% | — |
| Q4 2019 | 0 | 600,000 | -100.0% | $0 | 0.0% | — |
| Q3 2019 | 600,000 | 225,000 | -27.3% | $86.7M | 2.2% | $144.4 |
| Q2 2019 | 825,000 | 375,000 | -31.3% | $117.9M | 2.2% | $142.9 |
| Q1 2019 | 1,200,000 | — | — | $158.4M | 3.6% | $132.0 |
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 Senator Investment Group LP first disclose a DHR position in 13F-HR filings?
Senator Investment Group LP first reported DANAHER (DHR) on its 13F-HR filing for the period ending 2019-03-31 (Q1 2019). The position has appeared on 29 reported quarters within Pactolio's tracked window.
What was Senator Investment Group LP's most recent quarter-over-quarter share-count change in DHR?
Between Q4 2025 and Q1 2026, Senator Investment Group LP added 263,900 shares of DHR (+155.8%), bringing the total reported position to 433,316 shares at a market value of $82.2M.
Does the implied price-per-share represent Senator Investment Group LP's cost basis in DHR?
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.