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 | |
|---|---|---|---|---|---|---|
2651
PUT
Cerus
CERS
$587M
| $16K | ﹤0.01% |
+420
| New | +$1.99K |
|
2652
CenterPoint Energy
CNP
$29.1B
| $16K | ﹤0.01% |
+852
| New | +$17.2K |
|
2653
PUT
Invesco DB Base Metals Fund
DBB
$306M
| $16K | ﹤0.01% |
150
-22
| -13% | -$339 |
|
2654
CALL
DexCom
DXCM
$27.6B
| $16K | ﹤0.01% |
+164
| New | +$2.88K |
|
2655
Entegris
ENTG
$19.7B
| $16K | ﹤0.01% |
+1,166
| New | +$16.4K |
|
2656
PUT
Edwards Lifesciences
EW
$47.6B
| $16K | ﹤0.01% |
348
-18
| -5% | -$406 |
|
2657
PUT
FuelCell Energy
FCEL
$1.7B
| – | – |
0
| – | – |
|
2658
Fortuna Silver Mines
FSM
$2.59B
| $16K | ﹤0.01% |
4,557
+4,024
| +755% | +$15.1K |
|
2659
PUT
HCI Group
HCI
$2.28B
| $16K | ﹤0.01% |
60
-258
| -81% | -$11.6K |
|
2660
PUT
Intercontinental Exchange
ICE
$82.4B
| $16K | ﹤0.01% |
180
+40
| +29% | +$1.85K |
|
2661
PUT
Invesco
IVZ
$13.3B
| $16K | ﹤0.01% |
82
+40
| +95% | +$1.6K |
|
2662
CALL
Manulife Financial
MFC
$72.6B
| $16K | ﹤0.01% |
+164
| New | +$3.05K |
|
2663
PUT
Novavax
NVAX
$1.23B
| $16K | ﹤0.01% |
17
-14
| -45% | -$2.46K |
|
2664
PUT
Oceaneering
OII
$5.25B
| $16K | ﹤0.01% |
46
-31
| -40% | -$1.63K |
|
2665
OSI Systems
OSIS
$3.57B
| $16K | ﹤0.01% |
+228
| New | +$16.5K |
|
2666
PUT
Qualys
QLYS
$4.84B
| $16K | ﹤0.01% |
+47
| New | +$2.11K |
|
2667
Ross Stores
ROST
$76.6B
| $16K | ﹤0.01% |
+346
| New | +$17.4K |
|
2668
PUT
SiriusXM
SIRI
$10B
| $16K | ﹤0.01% |
13
+6
| +86% | +$233 |
|
2669
CALL
Teucrium Soybean Fund
SOYB
$57.2M
| $16K | ﹤0.01% |
+114
| New | +$2.2K |
|
2670
PUT
Scully Royalty
SRL
$76.7M
| $16K | ﹤0.01% |
10
+1
| +11% | +$22 |
|
2671
Stewart Information Services
STC
$2.05B
| $16K | ﹤0.01% |
+416
| New | +$15.9K |
|
2672
CALL
T. Rowe Price
TROW
$25B
| $16K | ﹤0.01% |
216
+118
| +120% | +$9.52K |
|
2673
CALL
Texas Roadhouse
TXRH
$12.7B
| $16K | ﹤0.01% |
171
+8
| +5% | +$286 |
|
2674
PUT
Vince Holding Corp
VNCE
$76.2M
| $16K | ﹤0.01% |
3
-3
| -50% | -$502 |
|
2675
CALL
Vanguard S&P 500 ETF
VOO
$968B
| $16K | ﹤0.01% |
314
-68
| -18% | -$13.1K |
|
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.