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 |
Broadcom
AVGO
|
+$33.7M |
| 2 |
SPDR Gold Trust
GLD
|
+$17.8M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$14.3M |
| 4 |
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
|
+$11.9M |
| 5 |
Citigroup
C
|
+$8.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$34.2M |
| 2 |
GMCR
KEURIG GREEN MTN INC
GMCR
|
+$17.9M |
| 3 |
Chipotle Mexican Grill
CMG
|
+$14.7M |
| 4 |
Walt Disney
DIS
|
+$13.3M |
| 5 |
Booking.com
BKNG
|
+$12.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 7.64% |
| 2 | Communication Services | 6.85% |
| 3 | Consumer Discretionary | 4.92% |
| 4 | Healthcare | 4.57% |
| 5 | Financials | 4.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4101
Plains GP Holdings
PAGP
$5.28B
| $5K | ﹤0.01% |
244
-18,655
| -99% | -$383K |
|
4102
CALL
PG&E
PCG
$39B
| $5K | ﹤0.01% |
12
-55
| -82% | -$3.06K |
|
4103
PhenixFIN
PFX
$83.1M
| $5K | ﹤0.01% |
40
-103
| -72% | -$13.2K |
|
4104
CALL
Philips
PHG
$25.5B
| $5K | ﹤0.01% |
+70
| New | +$1.29K |
|
4105
CALL
Dave & Buster's
PLAY
$357M
| $5K | ﹤0.01% |
+57
| New | +$2.08K |
|
4106
CALL
Douglas Dynamics
PLOW
$992M
| $5K | ﹤0.01% |
+47
| New | +$945 |
|
4107
CALL
Qualys
QLYS
$4.76B
| $5K | ﹤0.01% |
87
+25
| +40% | +$648 |
|
4108
QuickLogic
QUIK
$211M
| $5K | ﹤0.01% |
360
-7
| -2% | -$126 |
|
4109
Reading International Class A
RDI
$32.5M
| $5K | ﹤0.01% |
441
-2,634
| -86% | -$29K |
|
4110
PUT
RingCentral
RNG
$4.83B
| $5K | ﹤0.01% |
+17
| New | +$318 |
|
|
SNBR
4111
PUT
DELISTED
Sleep Number
SNBR
| $5K | ﹤0.01% |
+32
| New | +$611 |
|
4112
StoneX
SNEX
$8.72B
| $5K | ﹤0.01% |
+1,002
| New | +$5.4K |
|
|
SNV
4113
CALL
DELISTED
Synovus
SNV
| $5K | ﹤0.01% |
25
-5
| -17% | -$143 |
|
4114
CALL
Suburban Propane Partners
SPH
$1.21B
| $5K | ﹤0.01% |
54
-82
| -60% | -$2.16K |
|
4115
PUT
Sasol
SSL
$7.4B
| $5K | ﹤0.01% |
50
+36
| +257% | +$978 |
|
4116
CALL
STAG Industrial
STAG
$7.44B
| $5K | ﹤0.01% |
102
-33
| -24% | -$583 |
|
4117
STMicroelectronics
STM
$43.1B
| $5K | ﹤0.01% |
900
+291
| +48% | +$1.71K |
|
4118
PUT
Strategic Education
STRA
$1.98B
| $5K | ﹤0.01% |
+28
| New | +$1.38K |
|
4119
PUT
Smith & Wesson
SWBI
$649M
| $5K | ﹤0.01% |
57
+11
| +24% | +$205 |
|
4120
CALL
Texas Capital Bancshares
TCBI
$4.28B
| $5K | ﹤0.01% |
49
+19
| +63% | +$703 |
|
4121
iShares TIPS Bond ETF
TIP
$14.5B
| $5K | ﹤0.01% |
48
-215
| -82% | -$24K |
|
4122
CALL
Trinity Industries
TRN
$2.92B
| $5K | ﹤0.01% |
122
-270
| -69% | -$3.79K |
|
4123
PUT
TSMC
TSM
$1.94T
| $5K | ﹤0.01% |
467
-439
| -48% | -$10.3K |
|
|
UNIT
4124
PUT
Uniti Group
UNIT
$2.52B
| $5K | ﹤0.01% |
57
+53
| +1,325% | +$1.02K |
|
4125
PUT
Unum
UNM
$13.4B
| $5K | ﹤0.01% |
+98
| New | +$2.88K |
|
Similar funds
Simplex Trading's Q1 2016 Portfolio in Review
As of Q1 2016, Simplex Trading held 7,084 positions worth $1.25B, down 1.8% from $1.28B the previous quarter. Its ten largest holdings account for 17% of the portfolio.
Simplex Trading's Q1 2016 filing shows 1,678 new, 2,214 increased, 1,528 reduced and 1,505 closed positions. Its largest new stake was Broadcom: 2,493,400 shares worth $38.5M. The largest sale was Apple, an estimated $34.2M.
By sector, the portfolio is most concentrated in Technology at 7.6% of assets, up from 7% a quarter earlier, followed by Communication Services and Consumer Discretionary.
- Simplex Trading's largest Q1 2016 buy was Broadcom: 2,493,400 shares worth $38.5M.
- Simplex Trading added most to Citigroup in Q1 2016, an estimated $8.7M increase.
- Simplex Trading's biggest Q1 2016 reduction was Booking.com, cutting an estimated $12.1M.
- Simplex Trading fully exited Apple in Q1 2016, selling an estimated $34.2M.
- Simplex Trading's ten largest holdings make up 17% of its $1.25B portfolio in Q1 2016.
- Simplex Trading opened 1,678 new positions and closed 1,505 in Q1 2016.
- Simplex Trading's portfolio value fell 1.8% quarter-over-quarter to $1.25B.
Based on Simplex Trading's 13F filing for Q1 2016, filed 14 Apr 2016.