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
|
+$45.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$30.1M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$25.8M |
| 4 |
Booking.com
BKNG
|
+$22.5M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$17.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$43.6M |
| 2 |
Amgen
AMGN
|
+$33.2M |
| 3 |
Baidu
BIDU
|
+$19.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$17.3M |
| 5 |
Micron Technology
MU
|
+$17.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 14.31% |
| 2 | Technology | 13.17% |
| 3 | Communication Services | 11.81% |
| 4 | Healthcare | 4.06% |
| 5 | Financials | 3.84% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
MVO
4251
CALL
DELISTED
MV Oil Trust
MVO
| $6K | ﹤0.01% |
84
+1
| +1% | +$5 |
|
4252
CALL
NeoGenomics
NEO
$1.96B
| $6K | ﹤0.01% |
+18
| New | +$175 |
|
4253
PUT
NovoCure
NVCR
$1.77B
| $6K | ﹤0.01% |
31
-91
| -75% | -$1.79K |
|
4254
Northwest Natural Holdings
NWN
$2.15B
| $6K | ﹤0.01% |
+108
| New | +$6.93K |
|
|
ODP
4255
CALL
DELISTED
ODP
ODP
| $6K | ﹤0.01% |
17
-27
| -61% | -$1.33K |
|
4256
PUT
Okta
OKTA
$23.8B
| $6K | ﹤0.01% |
60
-31
| -34% | -$786 |
|
4257
PUT
Bank OZK
OZK
$5.63B
| $6K | ﹤0.01% |
463
+249
| +116% | +$11.1K |
|
|
PINC
4258
DELISTED
Premier
PINC
| $6K | ﹤0.01% |
191
+91
| +91% | +$3.09K |
|
4259
PUT
Restaurant Brands International
QSR
$26.2B
| $6K | ﹤0.01% |
309
+81
| +36% | +$5.01K |
|
4260
PUT
Quad
QUAD
$479M
| $6K | ﹤0.01% |
+96
| New | +$1.99K |
|
4261
PUT
Rocket Pharmaceuticals
RCKT
$343M
| $6K | ﹤0.01% |
20
+7
| +54% | +$32 |
|
4262
PUT
Rockwell Medical
RMTI
$27.2M
| $6K | ﹤0.01% |
3
+1
| +50% | +$765 |
|
4263
Republic Services
RSG
$67.4B
| $6K | ﹤0.01% |
100
-2,155
| -96% | -$140K |
|
4264
CALL
Rayonier Advanced Materials
RYAM
$562M
| $6K | ﹤0.01% |
225
-21
| -9% | -$299 |
|
|
SAFE
4265
Safehold
SAFE
$1.17B
| $6K | ﹤0.01% |
112
-990
| -90% | -$56.9K |
|
4266
CALL
SK Telecom
SKM
$11.4B
| $6K | ﹤0.01% |
83
-61
| -42% | -$2.58K |
|
4267
StoneX
SNEX
$8.72B
| $6K | ﹤0.01% |
+916
| New | +$6.7K |
|
4268
PUT
TD Synnex
SNX
$19.9B
| $6K | ﹤0.01% |
162
+88
| +119% | +$5.19K |
|
4269
SiriusPoint
SPNT
$3.03B
| $6K | ﹤0.01% |
+445
| New | +$6.4K |
|
4270
CALL
Supernus Pharmaceuticals
SUPN
$2.7B
| $6K | ﹤0.01% |
80
+66
| +471% | +$2.86K |
|
4271
CALL
Tucows
TCX
$104M
| $6K | ﹤0.01% |
45
+2
| +5% | +$109 |
|
|
TEF
4272
PUT
DELISTED
Telefonica
TEF
| $6K | ﹤0.01% |
203
+115
| +131% | +$1.01K |
|
4273
CALL
TC Energy
TRP
$70.1B
| $6K | ﹤0.01% |
133
-351
| -73% | -$17.6K |
|
4274
PUT
Tower Semiconductor
TSEM
$21.2B
| $6K | ﹤0.01% |
152
+121
| +390% | +$3.3K |
|
4275
CALL
UFP Industries
UFPI
$4.95B
| $6K | ﹤0.01% |
75
+24
| +47% | +$693 |
|
Similar funds
Simplex Trading's Q3 2017 Portfolio in Review
As of Q3 2017, Simplex Trading held 7,357 positions worth $2.45B, up 6.4% from $2.3B the previous quarter. Its ten largest holdings account for 24% of the portfolio.
Simplex Trading's Q3 2017 filing shows 1,313 new, 2,078 increased, 2,339 reduced and 1,500 closed positions. Its largest new stake was iShares Russell 2000 ETF: 214,170 shares worth $31.7M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $43.6M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 14% of assets, up from 9.7% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q3 2017 buy was iShares Russell 2000 ETF: 214,170 shares worth $31.7M.
- Simplex Trading added most to Amazon in Q3 2017, an estimated $45.9M increase.
- Simplex Trading's biggest Q3 2017 reduction was Baidu, cutting an estimated $19.3M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q3 2017, selling an estimated $43.6M.
- Simplex Trading's ten largest holdings make up 24% of its $2.45B portfolio in Q3 2017.
- Simplex Trading opened 1,313 new positions and closed 1,500 in Q3 2017.
- Simplex Trading's portfolio value rose 6.4% quarter-over-quarter to $2.45B.
Based on Simplex Trading's 13F filing for Q3 2017, filed 25 Oct 2017.