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 |
Alphabet (Google) Class C
GOOG
|
+$54.6M |
| 2 |
Apple
AAPL
|
+$29.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$15.7M |
| 4 |
IBM
IBM
|
+$13.8M |
| 5 |
Baidu
BIDU
|
+$10.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$10.1M |
| 2 |
McDonald's
MCD
|
+$8.46M |
| 3 |
Ralph Lauren
RL
|
+$5.36M |
| 4 |
Intel
INTC
|
+$5.04M |
| 5 |
WBA
Walgreens Boots Alliance
WBA
|
+$4.76M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 14.27% |
| 2 | Technology | 10.3% |
| 3 | Healthcare | 7.76% |
| 4 | Consumer Discretionary | 6.32% |
| 5 | Financials | 5.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
CST
851
DELISTED
CST Brands, Inc.
CST
| $181K | 0.02% |
4,645
-338
| -7% | -$14.1K |
|
|
IMOS
852
ChipMOS TECHNOLOGIES
IMOS
$2.08B
| $180K | 0.02% |
7,480
+7,209
| +2,660% | +$185K |
|
|
ONDK
853
DELISTED
On Deck Capital, Inc.
ONDK
| $180K | 0.02% |
+15,548
| New | +$258K |
|
854
PUT
Golar LNG
GLNG
$5.07B
| $179K | 0.02% |
140
+20
| +17% | +$867 |
|
855
Gogo Inc
GOGO
$510M
| $179K | 0.02% |
8,363
+7,471
| +838% | +$160K |
|
856
Pembina Pipeline
PBA
$29.8B
| $179K | 0.02% |
5,550
+3,398
| +158% | +$114K |
|
857
PUT
Puma Biotechnology
PBYI
$408M
| $179K | 0.02% |
77
+62
| +413% | +$11.2K |
|
|
INVN
858
DELISTED
Invensense Inc
INVN
| $179K | 0.02% |
+11,883
| New | +$179K |
|
|
AM
859
DELISTED
ANTERO MIDSTREAM PARTNERS LP
AM
| $179K | 0.02% |
+6,271
| New | +$169K |
|
|
POM
860
DELISTED
PEPCO HOLDINGS, INC.
POM
| $179K | 0.02% |
6,648
-10,357
| -61% | -$275K |
|
861
Ameriprise Financial
AMP
$46.8B
| $177K | 0.01% |
1,422
+280
| +25% | +$35.7K |
|
|
MLNX
862
DELISTED
Mellanox Technologies, Ltd.
MLNX
| $177K | 0.01% |
+3,647
| New | +$177K |
|
863
Campbell Soup
CPB
$6.38B
| $176K | 0.01% |
+3,708
| New | +$173K |
|
864
Methode Electronics
MEI
$569M
| $176K | 0.01% |
+6,413
| New | +$287K |
|
865
Truist Financial
TFC
$62.5B
| $175K | 0.01% |
4,346
+3,690
| +563% | +$146K |
|
866
Harley-Davidson
HOG
$2.79B
| $174K | 0.01% |
3,104
+2,212
| +248% | +$127K |
|
867
PUT
Illumina
ILMN
$29.8B
| $174K | 0.01% |
452
+338
| +296% | +$66K |
|
868
CALL
Yelp
YELP
$1.35B
| $174K | 0.01% |
2,377
+1,769
| +291% | +$82.1K |
|
|
ICPT
869
CALL
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $174K | 0.01% |
106
-18
| -15% | -$4.79K |
|
|
ANDV
870
CALL
DELISTED
Andeavor
ANDV
| $174K | 0.01% |
403
-40
| -9% | -$3.47K |
|
871
Delek US
DK
$3.97B
| $173K | 0.01% |
4,699
+4,085
| +665% | +$153K |
|
872
PUT
lululemon athletica
LULU
$12.6B
| $173K | 0.01% |
595
+82
| +16% | +$5.33K |
|
873
PUT
Merck
MRK
$322B
| $173K | 0.01% |
735
-129
| -15% | -$7.24K |
|
874
iShares MSCI ACWI ETF
ACWI
$32.7B
| $172K | 0.01% |
+2,897
| New | +$179K |
|
|
BLUE
875
PUT
DELISTED
bluebird bio
BLUE
| $172K | 0.01% |
13
+1
| +8% | +$2.04K |
|
Similar funds
Simplex Trading's Q2 2015 Portfolio in Review
As of Q2 2015, Simplex Trading held 6,639 positions worth $1.19B, up 39% from $860M the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $279M of net new capital in Q2 2015, opening 1,607 new positions and adding to 1,829 existing holdings. Its largest new stake was IBM: 85,948 shares worth $13.4M.
By sector, the portfolio is most concentrated in Communication Services at 14% of assets, up from 7.8% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Intel, an estimated $5.04M trimmed.
- Simplex Trading's largest Q2 2015 buy was IBM: 85,948 shares worth $13.4M.
- Simplex Trading added most to Alphabet (Google) Class C in Q2 2015, an estimated $54.6M increase.
- Simplex Trading's biggest Q2 2015 reduction was Intel, cutting an estimated $5.04M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q2 2015, selling an estimated $10.1M.
- Simplex Trading's ten largest holdings make up 20% of its $1.19B portfolio in Q2 2015.
- Simplex Trading opened 1,607 new positions and closed 1,438 in Q2 2015.
- Simplex Trading's portfolio value rose 39% quarter-over-quarter to $1.19B.
Based on Simplex Trading's 13F filing for Q2 2015, filed 8 Jul 2015.