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 | |
|---|---|---|---|---|---|---|
3601
PUT
Goldgroup Mining Inc.
GORO
$151M
| $10K | ﹤0.01% |
215
+115
| +115% | +$363 |
|
3602
CALL
Ingredion
INGR
$6.5B
| $10K | ﹤0.01% |
34
-23
| -40% | -$2.68K |
|
3603
PUT
Inovio Pharmaceuticals
INO
$79.8M
| $10K | ﹤0.01% |
16
+1
| +7% | +$121 |
|
3604
CALL
Korea Electric Power
KEP
$15B
| $10K | ﹤0.01% |
65
-4
| -6% | -$103 |
|
3605
CALL
Kayne Anderson Energy Infrastructure Fund
KYN
$2.44B
| $10K | ﹤0.01% |
20
-10
| -33% | -$181 |
|
3606
PUT
Lipocine
LPCN
$17.7M
| $10K | ﹤0.01% |
4
+2
| +100% | +$310 |
|
3607
PUT
Mattel
MAT
$4.47B
| $10K | ﹤0.01% |
143
+57
| +66% | +$1.81K |
|
3608
CALL
Manitowoc
MTW
$524M
| $10K | ﹤0.01% |
+54
| New | +$1.17K |
|
3609
PUT
Nordic American Tanker
NAT
$1.36B
| $10K | ﹤0.01% |
117
-91
| -44% | -$1.32K |
|
3610
PUT
NewMarket
NEU
$7.24B
| $10K | ﹤0.01% |
81
+67
| +479% | +$27K |
|
3611
PUT
Olin
OLN
$2.48B
| $10K | ﹤0.01% |
71
-159
| -69% | -$3.43K |
|
3612
CALL
Douglas Dynamics
PLOW
$1.03B
| $10K | ﹤0.01% |
64
+17
| +36% | +$382 |
|
3613
Plus Therapeutics
PSTV
$25.1M
| – | – |
0
| – | – |
|
3614
PUT
Patterson-UTI
PTEN
$3.5B
| $10K | ﹤0.01% |
214
+143
| +201% | +$2.69K |
|
3615
QCR Holdings
QCRH
$1.68B
| $10K | ﹤0.01% |
+398
| New | +$10.3K |
|
3616
PUT
Rambus
RMBS
$9.76B
| $10K | ﹤0.01% |
+173
| New | +$2.11K |
|
3617
PUT
Boston Beer
SAM
$1.96B
| $10K | ﹤0.01% |
63
-17
| -21% | -$2.75K |
|
3618
PUT
SAP
SAP
$212B
| $10K | ﹤0.01% |
+47
| New | +$3.69K |
|
3619
CALL
Sabra Healthcare REIT
SBRA
$5.62B
| $10K | ﹤0.01% |
+106
| New | +$2.21K |
|
3620
CALL
Comscore
SCOR
$107M
| $10K | ﹤0.01% |
68
+66
| +3,300% | +$39.5K |
|
3621
PUT
Sherwin-Williams
SHW
$87.3B
| $10K | ﹤0.01% |
81
-387
| -83% | -$37.7K |
|
3622
PUT
Tower Semiconductor
TSEM
$23.1B
| $10K | ﹤0.01% |
143
+41
| +40% | +$494 |
|
3623
PUT
Ubiquiti
UI
$32B
| $10K | ﹤0.01% |
137
+129
| +1,613% | +$4.79K |
|
3624
PUT
United Natural Foods
UNFI
$3.1B
| $10K | ﹤0.01% |
172
+159
| +1,223% | +$6.11K |
|
3625
CALL
Waters Corp
WAT
$37.4B
| $10K | ﹤0.01% |
53
+51
| +2,550% | +$6.9K |
|
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.