Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$148M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$67.3M |
| 3 |
Meta Platforms (Facebook)
META
|
+$63.2M |
| 4 |
Goldman Sachs
GS
|
+$23.9M |
| 5 |
Citigroup
C
|
+$23.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Berkshire Hathaway Class B
BRK.B
|
+$47.5M |
| 2 |
Apple
AAPL
|
+$46M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$44.5M |
| 4 |
Micron Technology
MU
|
+$29.1M |
| 5 |
Adobe
ADBE
|
+$22.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 1.13% |
| 2 | Communication Services | 0.89% |
| 3 | Technology | 0.68% |
| 4 | Industrials | 0.51% |
| 5 | Healthcare | 0.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2326
PUT
Ligand Pharmaceuticals
LGND
$6.02B
| $658K | ﹤0.01% |
38
-69
| -64% | -$10.4K |
|
2327
PUT
Smith & Wesson
SWBI
$655M
| $658K | ﹤0.01% |
552
+255
| +86% | +$2.31K |
|
2328
PUT
Zumiez
ZUMZ
$320M
| $658K | ﹤0.01% |
250
+200
| +400% | +$5.24K |
|
|
BPMC
2329
CALL
DELISTED
Blueprint Medicines
BPMC
| $655K | ﹤0.01% |
84
-76
| -48% | -$5.28K |
|
2330
CenterPoint Energy
CNP
$29.1B
| $655K | ﹤0.01% |
23,706
+23,608
| +24,090% | +$661K |
|
2331
PUT
Exelixis
EXEL
$13.9B
| $655K | ﹤0.01% |
370
+34
| +10% | +$663 |
|
|
CIT
2332
CALL
DELISTED
CIT Group Inc.
CIT
| $655K | ﹤0.01% |
127
-8
| -6% | -$426 |
|
2333
CALL
Generac Holdings
GNRC
$11.9B
| $654K | ﹤0.01% |
116
+98
| +544% | +$5.37K |
|
2334
CALL
Grand Canyon Education
LOPE
$3.71B
| $654K | ﹤0.01% |
58
+34
| +142% | +$3.97K |
|
2335
CALL
Molina Healthcare
MOH
$10.3B
| $654K | ﹤0.01% |
44
-10
| -19% | -$1.28K |
|
2336
PUT
Cleveland-Cliffs
CLF
$6.81B
| $653K | ﹤0.01% |
516
+265
| +106% | +$2.73K |
|
2337
PUT
Hasbro
HAS
$12.6B
| $651K | ﹤0.01% |
62
-113
| -65% | -$11.3K |
|
2338
Axalta
AXTA
$7.01B
| $650K | ﹤0.01% |
22,309
-3,346
| -13% | -$100K |
|
2339
CALL
Brookfield
BN
$102B
| $650K | ﹤0.01% |
409
+395
| +2,821% | +$6K |
|
2340
Canadian Pacific Kansas City
CP
$82B
| $650K | ﹤0.01% |
15,350
+12,385
| +418% | +$496K |
|
|
KSU
2341
DELISTED
Kansas City Southern
KSU
| $650K | ﹤0.01% |
+5,743
| New | +$654K |
|
2342
CALL
Ironwood Pharmaceuticals
IRWD
$611M
| $649K | ﹤0.01% |
420
-829
| -66% | -$13.1K |
|
2343
PUT
MasterCraft Boat Holdings
MCFT
$588M
| $649K | ﹤0.01% |
181
-70
| -28% | -$2.05K |
|
2344
Amphenol
APH
$188B
| $648K | ﹤0.01% |
+27,588
| New | +$641K |
|
2345
CALL
Enphase Energy
ENPH
$4.84B
| $648K | ﹤0.01% |
1,337
+377
| +39% | +$2.07K |
|
2346
CALL
Liberty Media Series A
FWONA
$22.3B
| $648K | ﹤0.01% |
166
+128
| +337% | +$4.25K |
|
2347
PUT
Itron
ITRI
$3.73B
| $648K | ﹤0.01% |
101
+99
| +4,950% | +$6.25K |
|
2348
PUT
Globus Medical
GMED
$10.4B
| $647K | ﹤0.01% |
114
+34
| +43% | +$1.79K |
|
2349
CALL
KB Home
KBH
$3.48B
| $647K | ﹤0.01% |
271
+92
| +51% | +$2.31K |
|
2350
Palo Alto Networks
PANW
$264B
| $646K | ﹤0.01% |
17,214
-118,194
| -87% | -$4.3M |
|
Similar funds
Simplex Trading's Q3 2018 Portfolio in Review
As of Q3 2018, Simplex Trading held 8,699 positions worth $31.1B, up 22% from $25.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q3 2018 filing shows 1,336 new, 3,066 increased, 2,755 reduced and 1,315 closed positions. Its largest new stake was Invesco QQQ Trust: 371,806 shares worth $69.1M. The largest sale was Berkshire Hathaway Class B, an estimated $47.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 1.1% of assets, up from 0.92% a quarter earlier, followed by Communication Services and Technology.
- Simplex Trading's largest Q3 2018 buy was Invesco QQQ Trust: 371,806 shares worth $69.1M.
- Simplex Trading added most to Amazon in Q3 2018, an estimated $148M increase.
- Simplex Trading's biggest Q3 2018 reduction was Apple, cutting an estimated $46M.
- Simplex Trading fully exited Berkshire Hathaway Class B in Q3 2018, selling an estimated $47.5M.
- Simplex Trading's ten largest holdings make up 34% of its $31.1B portfolio in Q3 2018.
- Simplex Trading opened 1,336 new positions and closed 1,315 in Q3 2018.
- Simplex Trading's portfolio value rose 22% quarter-over-quarter to $31.1B.
Based on Simplex Trading's 13F filing for Q3 2018, filed 23 Oct 2018.