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 | |
|---|---|---|---|---|---|---|
|
LXK
1176
PUT
DELISTED
Lexmark Intl Inc
LXK
| $154K | 0.01% |
1,339
+1,004
| +300% | +$37.1K |
|
1177
CALL
Archer Daniels Midland
ADM
$41.6B
| $153K | 0.01% |
934
+569
| +156% | +$22.7K |
|
1178
PUT
Lloyds Banking Group
LYG
$87B
| $153K | 0.01% |
909
+305
| +50% | +$1.19K |
|
|
BHI
1179
DELISTED
Baker Hughes
BHI
| $153K | 0.01% |
3,400
+2,343
| +222% | +$106K |
|
1180
CALL
First Solar
FSLR
$22.1B
| $152K | 0.01% |
823
+372
| +82% | +$19.8K |
|
1181
PUT
Alaunos Therapeutics
TCRT
$4.69M
| $152K | 0.01% |
3
-1
| -25% | -$1.09K |
|
|
SPN
1182
DELISTED
Superior Energy Services, Inc.
SPN
| $152K | 0.01% |
+831
| New | +$136K |
|
1183
CALL
Alamos Gold
AGI
$12.3B
| $151K | 0.01% |
700
+41
| +6% | +$281 |
|
1184
CALL
Cirrus Logic
CRUS
$6.74B
| $151K | 0.01% |
371
-14
| -4% | -$502 |
|
1185
First Trust Natural Gas ETF
FCG
$636M
| $151K | 0.01% |
+6,205
| New | +$147K |
|
1186
Flex
FLEX
$46.9B
| $151K | 0.01% |
17,073
+11,884
| +229% | +$111K |
|
1187
PUT
PBF Energy
PBF
$7.33B
| $151K | 0.01% |
459
+35
| +8% | +$1.01K |
|
1188
PUT
Banco Santander
SAN
$189B
| $151K | 0.01% |
2,321
+2,275
| +4,946% | +$9.88K |
|
|
PAY
1189
DELISTED
Verifone Systems Inc
PAY
| $151K | 0.01% |
+8,168
| New | +$207K |
|
|
MKTO
1190
CALL
DELISTED
MARKETO INC COM STK (DE)
MKTO
| $151K | 0.01% |
1,219
+1,202
| +7,071% | +$33.3K |
|
|
CYBR
1191
CALL
DELISTED
CyberArk
CYBR
| $150K | 0.01% |
576
-7
| -1% | -$302 |
|
|
MOMO
1192
PUT
Hello Group
MOMO
$870M
| $150K | 0.01% |
448
-970
| -68% | -$13.1K |
|
1193
PUT
GameStop
GME
$9.58B
| $149K | 0.01% |
2,932
-2,540
| -46% | -$18.6K |
|
|
LVLT
1194
PUT
DELISTED
Level 3 Communications Inc
LVLT
| $149K | 0.01% |
314
+166
| +112% | +$8.68K |
|
1195
CRH
CRH
$65.5B
| $148K | 0.01% |
+5,016
| New | +$147K |
|
1196
PUT
Ralph Lauren
RL
$22.1B
| $148K | 0.01% |
197
+81
| +70% | +$7.52K |
|
|
N
1197
PUT
DELISTED
Netsuite Inc
N
| $148K | 0.01% |
347
+314
| +952% | +$24.1K |
|
1198
Banc of California
BANC
$3.3B
| $147K | 0.01% |
8,158
+7,540
| +1,220% | +$145K |
|
1199
Markel Group
MKL
$24.5B
| $147K | 0.01% |
155
-1,191
| -88% | -$1.11M |
|
1200
PUT
Acadia Healthcare
ACHC
$3.13B
| $146K | 0.01% |
232
+161
| +227% | +$9.42K |
|
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.