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 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2101
PUT
Lamb Weston
LW
$6.82B
| $843K | ﹤0.01% |
116
-25
| -18% | -$1.72K |
|
2102
PUT
National Vision
EYE
$1.6B
| $842K | ﹤0.01% |
350
+325
| +1,300% | +$9.47K |
|
2103
CALL
Armstrong World Industries
AWI
$6.86B
| $841K | ﹤0.01% |
87
+58
| +200% | +$5.59K |
|
|
CUK
2104
CALL
DELISTED
Carnival PLC
CUK
| $841K | ﹤0.01% |
200
+180
| +900% | +$8.04K |
|
2105
CALL
Woodward
WWD
$25B
| $841K | ﹤0.01% |
78
+42
| +117% | +$4.62K |
|
|
ROCC
2106
CALL
DELISTED
Ranger Oil Corporation Class A Common Stock
ROCC
| $840K | ﹤0.01% |
289
+275
| +1,964% | +$8.53K |
|
2107
PUT
Phillips 66
PSX
$82.9B
| $839K | ﹤0.01% |
82
-286
| -78% | -$28.7K |
|
2108
Goldman Sachs
GS
$313B
| $838K | ﹤0.01% |
+4,045
| New | +$846K |
|
|
FOCS
2109
DELISTED
Focus Financial Partners Inc. Class A
FOCS
| $838K | ﹤0.01% |
35,232
+11,370
| +48% | +$280K |
|
2110
PUT
Bilibili
BILI
$7.18B
| $837K | ﹤0.01% |
593
-40
| -6% | -$601 |
|
|
KSU
2111
CALL
DELISTED
Kansas City Southern
KSU
| $837K | ﹤0.01% |
63
-376
| -86% | -$46.9K |
|
2112
Heron Therapeutics
HRTX
$86.3M
| $836K | ﹤0.01% |
45,215
+25,692
| +132% | +$473K |
|
2113
CALL
Kulicke & Soffa
KLIC
$5.3B
| $835K | ﹤0.01% |
356
+328
| +1,171% | +$7.21K |
|
|
TGR
2114
PUT
DELISTED
ISHARES TARGET DATE RETIREMENT INCOME ETF
TGR
| $835K | ﹤0.01% |
472
+156
| +49% | +$276K |
|
|
CARB
2115
PUT
DELISTED
Carbonite Inc
CARB
| $833K | ﹤0.01% |
538
+492
| +1,070% | +$8.77K |
|
|
TIVO
2116
DELISTED
Tivo Inc
TIVO
| $832K | ﹤0.01% |
109,303
-66,886
| -38% | -$511K |
|
|
QVCGA
2117
PUT
DELISTED
QVC Group Inc Series A
QVCGA
| $831K | ﹤0.01% |
17
-4
| -19% | -$2.35K |
|
|
CDK
2118
CALL
DELISTED
CDK Global, Inc.
CDK
| $831K | ﹤0.01% |
173
+77
| +80% | +$3.69K |
|
2119
PUT
Nokia
NOK
$50.8B
| $830K | ﹤0.01% |
1,642
-323
| -16% | -$1.67K |
|
2120
CALL
eHealth
EHTH
$42.5M
| $828K | ﹤0.01% |
124
+97
| +359% | +$8.75K |
|
2121
CALL
Eagle Materials
EXP
$6.6B
| $828K | ﹤0.01% |
92
+52
| +130% | +$4.46K |
|
|
TWOU
2122
PUT
DELISTED
2U Inc
TWOU
| $828K | ﹤0.01% |
17
+16
| +1,600% | +$11.5K |
|
2123
PUT
SSR Mining
SSRM
$5.57B
| $826K | ﹤0.01% |
569
+406
| +249% | +$6.25K |
|
2124
iShares MSCI ACWI ETF
ACWI
$32.6B
| $825K | ﹤0.01% |
11,197
-4,843
| -30% | -$355K |
|
2125
CALL
Public Service Enterprise Group
PEG
$39.8B
| $825K | ﹤0.01% |
133
+104
| +359% | +$6.21K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.