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 | |
|---|---|---|---|---|---|---|
701
PUT
Trinity Industries
TRN
$2.94B
| $247K | 0.02% |
476
-121
| -20% | -$2.71K |
|
|
GG
702
DELISTED
Goldcorp Inc
GG
| $247K | 0.02% |
15,306
+238
| +2% | +$4.34K |
|
703
PUT
VanEck International High Yield Bond ETF
IHY
$42.7M
| $246K | 0.02% |
138
-2,031
| -94% | -$50.3K |
|
704
Vanguard Total World Stock ETF
VT
$76.3B
| $246K | 0.02% |
+4,011
| New | +$254K |
|
705
InterDigital
IDCC
$6.6B
| $245K | 0.02% |
4,318
+2,595
| +151% | +$145K |
|
706
iShares 7-10 Year Treasury Bond ETF
IEF
$47B
| $245K | 0.02% |
+2,342
| New | +$249K |
|
|
BWLD
707
PUT
DELISTED
Buffalo Wild Wings, Inc.
BWLD
| $245K | 0.02% |
147
+112
| +320% | +$18.3K |
|
|
BEAV
708
DELISTED
B/E Aerospace Inc
BEAV
| $245K | 0.02% |
4,464
+3,964
| +793% | +$236K |
|
709
CALL
Phillips 66
PSX
$84.7B
| $244K | 0.02% |
470
-20
| -4% | -$1.59K |
|
|
BMS
710
DELISTED
Bemis
BMS
| $243K | 0.02% |
5,407
+4,322
| +398% | +$198K |
|
|
RLYP
711
DELISTED
RELYPSA INC COM
RLYP
| $242K | 0.02% |
7,332
+5,147
| +236% | +$177K |
|
712
Shutterstock
SSTK
$205M
| $241K | 0.02% |
4,118
+2,975
| +260% | +$194K |
|
|
CPHD
713
DELISTED
Cepheid Inc
CPHD
| $241K | 0.02% |
+3,949
| New | +$225K |
|
714
PUT
General Motors
GM
$72B
| $240K | 0.02% |
760
-82
| -10% | -$2.92K |
|
|
IOC
715
DELISTED
Interoil Corporation
IOC
| $240K | 0.02% |
3,994
+1,317
| +49% | +$67.1K |
|
716
PUT
Workday
WDAY
$32B
| $239K | 0.02% |
338
+186
| +122% | +$15.8K |
|
717
CALL
lululemon athletica
LULU
$12.6B
| $238K | 0.02% |
185
-292
| -61% | -$19K |
|
|
LKM
718
DELISTED
Link Motion Inc.
LKM
| $237K | 0.02% |
+45,069
| New | +$201K |
|
719
CALL
Bristol-Myers Squibb
BMY
$126B
| $235K | 0.02% |
1,034
-127
| -11% | -$8.37K |
|
|
TWC
720
PUT
DELISTED
TIME WARNER CABLE INC NEW COM STK
TWC
| $235K | 0.02% |
1,676
+483
| +40% | +$80K |
|
|
BNY
721
Bank of New York Mellon
BNY
$109B
| $234K | 0.02% |
5,596
-8,730
| -61% | -$372K |
|
722
Darling Ingredients
DAR
$10.2B
| $234K | 0.02% |
+15,970
| New | +$236K |
|
|
ESPR
723
PUT
DELISTED
Esperion Therapeutics
ESPR
| $234K | 0.02% |
221
+58
| +36% | +$5.68K |
|
724
PUT
F5
FFIV
$22.2B
| $234K | 0.02% |
358
+198
| +124% | +$24.3K |
|
725
PUT
Verizon
VZ
$184B
| $233K | 0.02% |
553
+253
| +84% | +$12.4K |
|
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.