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 | |
|---|---|---|---|---|---|---|
51
Amgen
AMGN
$198B
| $3.54M | 0.3% |
23,076
+14,654
| +174% | +$2.35M |
|
52
GoPro
GPRO
$125M
| $3.32M | 0.28% |
63,029
+14,522
| +30% | +$746K |
|
53
AutoZone
AZO
$49.2B
| $3.31M | 0.28% |
4,957
+4,292
| +645% | +$2.94M |
|
|
CTRX
54
DELISTED
CATAMARAN CORP COM STK (CDA)
CTRX
| $3.27M | 0.27% |
53,534
-38,757
| -42% | -$2.33M |
|
|
55
CALL
Alphabet (Google) Class C
GOOG
$4.22T
| $3.21M | 0.27% |
64,920
-7,037
| -10% | -$189K |
|
56
CF Industries
CF
$18.9B
| $3.16M | 0.27% |
49,199
+41,559
| +544% | +$2.53M |
|
57
CALL
Biogen
BIIB
$30B
| $3.15M | 0.26% |
762
+120
| +19% | +$48.2K |
|
58
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
$3.42B
| $3.11M | 0.26% |
16,669
+15,607
| +1,470% | +$3.19M |
|
59
VanEck Gold Miners ETF
GDX
$22.7B
| $3.04M | 0.25% |
171,192
+95,326
| +126% | +$1.85M |
|
60
WisdomTree Japan Hedged Equity Fund
DXJ
$7.21B
| $3.01M | 0.25% |
52,707
-468
| -0.9% | -$27.1K |
|
61
PUT
Amazon
AMZN
$2.66T
| $2.97M | 0.25% |
81,920
-3,060
| -4% | -$64K |
|
|
MNDT
62
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $2.97M | 0.25% |
60,725
+2,633
| +5% | +$119K |
|
63
iShares China Large-Cap ETF
FXI
$4.31B
| $2.97M | 0.25% |
64,397
+52,173
| +427% | +$2.58M |
|
64
Ionis Pharmaceuticals
IONS
$8.82B
| $2.91M | 0.24% |
50,499
+10,251
| +25% | +$652K |
|
65
Southwest Airlines
LUV
$23.8B
| $2.89M | 0.24% |
87,310
+73,538
| +534% | +$2.88M |
|
66
Vanguard Real Estate ETF
VNQ
$39.4B
| $2.89M | 0.24% |
38,692
+28,503
| +280% | +$2.28M |
|
67
FedEx
FDX
$75.2B
| $2.87M | 0.24% |
16,851
+9,777
| +138% | +$1.7M |
|
68
American International
AIG
$42.5B
| $2.86M | 0.24% |
+46,319
| New | +$2.74M |
|
|
SIAL
69
DELISTED
SIGMA - ALDRICH CORP
SIAL
| $2.84M | 0.24% |
20,380
+15,055
| +283% | +$2.09M |
|
|
CAVM
70
DELISTED
Cavium, Inc.
CAVM
| $2.83M | 0.24% |
+41,116
| New | +$2.88M |
|
71
PUT
Booking.com
BKNG
$139B
| $2.73M | 0.23% |
34,750
+3,550
| +11% | +$169K |
|
72
ProShares Ultra Bloomberg Crude Oil
UCO
$425M
| $2.71M | 0.23% |
4,802
+4,206
| +706% | +$2.41M |
|
73
Union Pacific
UNP
$174B
| $2.7M | 0.23% |
28,292
+19,899
| +237% | +$2.07M |
|
|
AGN
74
CALL
DELISTED
Allergan plc
AGN
| $2.67M | 0.22% |
1,295
-150
| -10% | -$44.7K |
|
|
CELG
75
CALL
DELISTED
Celgene Corp
CELG
| $2.65M | 0.22% |
2,966
-928
| -24% | -$106K |
|
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.