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 |
LNKD
LinkedIn Corporation
LNKD
|
+$21.4M |
| 2 |
SPDR Gold Trust
GLD
|
+$17.3M |
| 3 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$15M |
| 4 |
Biogen
BIIB
|
+$14.9M |
| 5 |
Visa
V
|
+$14.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$36.7M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$20.1M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$15.8M |
| 4 |
Citigroup
C
|
+$14.7M |
| 5 |
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
|
+$13.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 6.61% |
| 2 | Healthcare | 6.55% |
| 3 | Technology | 6.45% |
| 4 | Consumer Discretionary | 4.54% |
| 5 | Financials | 4.51% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
DRII
151
DELISTED
DIAMOND RESORTS INTL, INC
DRII
| $1.88M | 0.13% |
62,834
+50,122
| +394% | +$1.13M |
|
|
ALXN
152
DELISTED
Alexion Pharmaceuticals
ALXN
| $1.88M | 0.13% |
+16,097
| New | +$2.28M |
|
153
United Natural Foods
UNFI
$2.94B
| $1.87M | 0.12% |
39,929
+35,819
| +872% | +$1.38M |
|
154
Bank of America
BAC
$430B
| $1.83M | 0.12% |
138,274
-425,530
| -75% | -$5.98M |
|
155
ProShares UltraShort S&P500
SDS
$396M
| $1.81M | 0.12% |
1,018
-359
| -26% | -$664K |
|
156
Ametek
AME
$53.9B
| $1.8M | 0.12% |
+38,916
| New | +$1.87M |
|
157
Cummins
CMI
$91.1B
| $1.79M | 0.12% |
15,972
+2,276
| +17% | +$258K |
|
|
SNP
158
DELISTED
CHINA PETROLEUM & CHEMICAL CORPORATION ADS (REP 100 ORDINARY H SHARES)
SNP
| $1.78M | 0.12% |
24,778
+8,871
| +56% | +$606K |
|
|
DWA
159
DELISTED
DREAMWORKS ANIMATION SKG INC CL-A
DWA
| $1.77M | 0.12% |
43,342
+36,860
| +569% | +$1.33M |
|
160
Alaska Air
ALK
$5.07B
| $1.77M | 0.12% |
30,321
+25,965
| +596% | +$1.79M |
|
|
AMJ
161
DELISTED
JP Morgan Alerian MLP Index ETN 5/24/24
AMJ
| $1.73M | 0.12% |
+54,431
| New | +$1.62M |
|
162
Boston Scientific
BSX
$64.2B
| $1.73M | 0.12% |
73,834
+66,642
| +927% | +$1.44M |
|
163
ProShares Ultra QQQ
QLD
$13.5B
| $1.72M | 0.11% |
386,160
+282,944
| +274% | +$1.27M |
|
164
ProShares Ultra Real Estate
URE
$58.4M
| $1.71M | 0.11% |
26,674
+722
| +3% | +$41.5K |
|
165
Regeneron Pharmaceuticals
REGN
$70.5B
| $1.7M | 0.11% |
+4,864
| New | +$1.87M |
|
166
Applied Materials
AMAT
$448B
| $1.68M | 0.11% |
70,187
+37,255
| +113% | +$822K |
|
167
Halliburton
HAL
$27.7B
| $1.68M | 0.11% |
+37,142
| New | +$1.53M |
|
168
Wynn Resorts
WYNN
$9.93B
| $1.67M | 0.11% |
18,439
-31,164
| -63% | -$2.96M |
|
169
Mondelez International
MDLZ
$76.8B
| $1.67M | 0.11% |
36,629
-33,586
| -48% | -$1.46M |
|
170
CALL
iShares MSCI Australia ETF
EWA
$1.34B
| $1.66M | 0.11% |
6,702
-3,458
| -34% | -$67.5K |
|
|
QIHU
171
PUT
DELISTED
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
| $1.65M | 0.11% |
6,357
+2,907
| +84% | +$215K |
|
|
IM
172
DELISTED
Ingram Micro
IM
| $1.64M | 0.11% |
47,109
+22,371
| +90% | +$780K |
|
173
DexCom
DXCM
$29.2B
| $1.64M | 0.11% |
82,556
+80,160
| +3,346% | +$1.36M |
|
174
Vodafone
VOD
$35.2B
| $1.64M | 0.11% |
+52,992
| New | +$1.72M |
|
175
CALL
United Parcel Service
UPS
$96.2B
| $1.61M | 0.11% |
4,087
+46
| +1% | +$4.79K |
|
Similar funds
Simplex Trading's Q2 2016 Portfolio in Review
As of Q2 2016, Simplex Trading held 7,153 positions worth $1.5B, up 19% from $1.25B the previous quarter. Its ten largest holdings account for 19% of the portfolio.
Simplex Trading deployed $178M of net new capital in Q2 2016, opening 1,586 new positions and adding to 2,321 existing holdings. Its largest new stake was Biogen: 56,467 shares worth $13.7M.
By sector, the portfolio is most concentrated in Communication Services at 6.6% of assets, down from 6.9% a quarter earlier, followed by Healthcare and Technology.
On the sell side, the largest reduction was Broadcom, an estimated $36.7M trimmed.
- Simplex Trading's largest Q2 2016 buy was Biogen: 56,467 shares worth $13.7M.
- Simplex Trading added most to LinkedIn Corporation in Q2 2016, an estimated $21.4M increase.
- Simplex Trading's biggest Q2 2016 reduction was Broadcom, cutting an estimated $36.7M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q2 2016, selling an estimated $20.1M.
- Simplex Trading's ten largest holdings make up 19% of its $1.5B portfolio in Q2 2016.
- Simplex Trading opened 1,586 new positions and closed 1,363 in Q2 2016.
- Simplex Trading's portfolio value rose 19% quarter-over-quarter to $1.5B.
Based on Simplex Trading's 13F filing for Q2 2016, filed 18 Jul 2016.