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 | |
|---|---|---|---|---|---|---|
|
CBI
126
PUT
DELISTED
Chicago Bridge & Iron Nv
CBI
| $1.9M | 0.15% |
613
-590
| -49% | -$21.1K |
|
|
DD
127
DELISTED
Du Pont De Nemours E I
DD
| $1.9M | 0.15% |
29,950
+25,950
| +649% | +$1.55M |
|
128
PUT
Direxion Daily Technology Bull 3x ETF
TECL
$5.6B
| $1.88M | 0.15% |
45,670
+3,870
| +9% | +$12.4K |
|
|
LNKD
129
DELISTED
LinkedIn Corporation
LNKD
| $1.85M | 0.15% |
16,206
+7,531
| +87% | +$1.11M |
|
130
Expedia Group
EXPE
$31.8B
| $1.82M | 0.15% |
16,917
+1,606
| +10% | +$171K |
|
131
Las Vegas Sands
LVS
$30.4B
| $1.8M | 0.14% |
+34,884
| New | +$1.6M |
|
132
CVS Health
CVS
$137B
| $1.8M | 0.14% |
+17,329
| New | +$1.68M |
|
133
Direxion Daily Financial Bull 3x ETF
FAS
$2.38B
| $1.79M | 0.14% |
72,457
+65,768
| +983% | +$1.45M |
|
|
134
PUT
Booking.com
BKNG
$139B
| $1.75M | 0.14% |
35,450
-8,525
| -19% | -$408K |
|
135
PUT
Pfizer
PFE
$142B
| $1.73M | 0.14% |
9,342
+4,087
| +78% | +$117K |
|
136
CALL
Salesforce
CRM
$139B
| $1.71M | 0.14% |
1,508
+135
| +10% | +$9.3K |
|
137
Terex
TEX
$7.19B
| $1.71M | 0.14% |
68,622
+57,982
| +545% | +$1.21M |
|
|
AET
138
DELISTED
Aetna Inc
AET
| $1.68M | 0.13% |
+14,937
| New | +$1.6M |
|
|
ANAC
139
DELISTED
ANACOR PHARMACEUTICALS INC COM
ANAC
| $1.66M | 0.13% |
+31,131
| New | +$2.3M |
|
|
140
PUT
Walt Disney
DIS
$167B
| $1.66M | 0.13% |
5,378
-5,958
| -53% | -$575K |
|
141
GoPro
GPRO
$118M
| $1.65M | 0.13% |
138,107
+109,358
| +380% | +$1.36M |
|
142
State Street SPDR EURO STOXX 50 ETF
FEZ
$4.32B
| $1.65M | 0.13% |
+49,625
| New | +$1.59M |
|
143
HSBC
HSBC
$347B
| $1.64M | 0.13% |
59,009
+57,827
| +4,892% | +$1.71M |
|
144
Cognizant
CTSH
$21.1B
| $1.61M | 0.13% |
+25,760
| New | +$1.5M |
|
|
SPLK
145
PUT
DELISTED
Splunk Inc
SPLK
| $1.61M | 0.13% |
461
+306
| +197% | +$13.8K |
|
146
ProShares UltraPro QQQ
TQQQ
$34.7B
| $1.61M | 0.13% |
754,752
+129,552
| +21% | +$241K |
|
|
GOLD
147
DELISTED
Randgold Resources Ltd
GOLD
| $1.6M | 0.13% |
17,611
+3,520
| +25% | +$283K |
|
148
PUT
Boeing
BA
$161B
| $1.57M | 0.13% |
3,173
+648
| +26% | +$80.4K |
|
149
CALL
VanEck Gold Miners ETF
GDX
$22.7B
| $1.55M | 0.12% |
7,063
+5,805
| +461% | +$99.9K |
|
150
AutoZone
AZO
$48.9B
| $1.54M | 0.12% |
1,940
-2,008
| -51% | -$1.52M |
|
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.