William Harnisch Peconic Partners
William Harnisch is the founder of Peconic Partners, a concentrated investment firm known for high-conviction equity positions. The firm’s portfolio often differs sharply from broad market benchmarks, reflecting a willingness to concentrate capital. Harnisch’s disclosures are tracked by investors interested in bold, research-driven concentration.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
WPX
WPX Energy, Inc.
WPX
|
+$24.1M |
| 2 |
EOG Resources
EOG
|
+$19.8M |
| 3 |
United Rentals
URI
|
+$18.9M |
| 4 |
FLXN
Flexion Therapeutics, Inc.
FLXN
|
+$13.4M |
| 5 |
Walmart Inc
WMT
|
+$9.05M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Quanta Services
PWR
|
+$178M |
| 2 |
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
|
+$27.6M |
| 3 |
Costco
COST
|
+$24.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$10.7M |
| 5 |
WCC
WESCO International
WCC
|
+$10.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Industrials | 39.2% |
| 2 | Energy | 13.46% |
| 3 | Healthcare | 5.24% |
| 4 | Real Estate | 3.32% |
| 5 | Consumer Discretionary | 2.97% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
51
Alphabet (Google) Class A
GOOGL
$4.22T
| – | – |
-220,000
| Closed | -$10.7M |
|
52
Primoris Services
PRIM
$4.15B
| – | – |
-25,000
| Closed | -$736K |
|
|
53
Quanta Services
PWR
$96.1B
| – | – |
-4,754,856
| Closed | -$178M |
|
54
Teck Resources
TECK
$33.9B
| – | – |
-180,000
| Closed | -$3.8M |
|
55
PUT
T-Mobile US
TMUS
$196B
| – | – |
-10,000
| Closed | -$617K |
|
|
XYZ
56
Block Inc
XYZ
$49.4B
| – | – |
-10,000
| Closed | -$288K |
|
|
AUY
57
DELISTED
Yamana Gold, Inc.
AUY
| – | – |
-1,100,000
| Closed | -$2.92M |
|
|
RSPP
58
DELISTED
RSP Permian, Inc.
RSPP
| – | – |
-20,000
| Closed | -$692K |
|
|
BEAT
59
DELISTED
BioTelemetry, Inc.
BEAT
| – | – |
-10,000
| Closed | -$330K |
|
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William Harnisch's Q4 2017 Portfolio in Review
As of Q4 2017, William Harnisch held 61 positions worth $696M, up 12% from $620M the previous quarter. Its ten largest holdings account for 84% of the portfolio.
William Harnisch deployed $42.6M of net new capital in Q4 2017, opening 17 new positions and adding to 6 existing holdings. Its largest new stake was WPX Energy, Inc.: 1,994,845 shares worth $28.1M.
By sector, the portfolio is most concentrated in Industrials at 39% of assets, down from 68% a quarter earlier, followed by Energy and Healthcare.
On the sell side, the largest reduction was State Street SPDR S&P Oil & Gas Exploration & Production ETF, an estimated $27.6M trimmed.
- William Harnisch's largest Q4 2017 buy was WPX Energy, Inc.: 1,994,845 shares worth $28.1M.
- William Harnisch added most to United Rentals in Q4 2017, an estimated $18.9M increase.
- William Harnisch's biggest Q4 2017 reduction was State Street SPDR S&P Oil & Gas Exploration & Production ETF, cutting an estimated $27.6M.
- William Harnisch fully exited Quanta Services in Q4 2017, selling an estimated $178M.
- William Harnisch's ten largest holdings make up 84% of its $696M portfolio in Q4 2017.
- William Harnisch opened 17 new positions and closed 11 in Q4 2017.
- William Harnisch's portfolio value rose 12% quarter-over-quarter to $696M.
Based on Peconic Partners's 13F filing for Q4 2017, filed 14 Feb 2018.