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 | |
|---|---|---|---|---|---|---|
|
GRMN
351
Garmin
GRMN
$46.4B
| $588K | 0.05% |
13,387
+2,927
| +28% | +$135K |
|
352
Bank of America
BAC
$432B
| $587K | 0.05% |
34,513
+8,652
| +33% | +$143K |
|
353
PUT
PepsiCo
PEP
$185B
| $582K | 0.05% |
2,075
+1,421
| +217% | +$136K |
|
354
Bath & Body Works
BBWI
$4.04B
| $581K | 0.05% |
+8,396
| New | +$603K |
|
355
Vanguard FTSE Europe ETF
VGK
$30.2B
| $581K | 0.05% |
10,778
-5,088
| -32% | -$288K |
|
|
SUNE
356
DELISTED
SUNEDISON, INC COM
SUNE
| $580K | 0.05% |
19,406
+41
| +0.2% | +$1.17K |
|
|
AGN
357
PUT
DELISTED
Allergan plc
AGN
| $575K | 0.05% |
719
-420
| -37% | -$125K |
|
358
Trinity Industries
TRN
$2.87B
| $571K | 0.05% |
30,039
+15,884
| +112% | +$356K |
|
|
WUBA
359
DELISTED
58.com Inc
WUBA
| $569K | 0.05% |
+8,887
| New | +$646K |
|
360
PUT
Goldman Sachs
GS
$324B
| $562K | 0.05% |
2,332
+384
| +20% | +$78.2K |
|
361
Puma Biotechnology
PBYI
$401M
| $562K | 0.05% |
4,814
+3,110
| +183% | +$563K |
|
|
ANAC
362
CALL
DELISTED
ANACOR PHARMACEUTICALS INC COM
ANAC
| $558K | 0.05% |
314
-66
| -17% | -$4.33K |
|
363
CALL
SPDR Gold Trust
GLD
$133B
| $557K | 0.05% |
1,334
-520
| -28% | -$59.5K |
|
364
Alaska Air
ALK
$4.94B
| $556K | 0.05% |
8,642
+2,782
| +47% | +$179K |
|
365
CALL
BioMarin Pharmaceuticals
BMRN
$11.3B
| $553K | 0.05% |
330
-37
| -10% | -$4.58K |
|
|
SNDK
366
PUT
DELISTED
SANDISK CORP
SNDK
| $552K | 0.05% |
497
-809
| -62% | -$54.1K |
|
|
367
PUT
Intel
INTC
$516B
| $550K | 0.05% |
1,430
+204
| +17% | +$6.59K |
|
368
iShare MSCI Eurozone ETF
EZU
$9.53B
| $549K | 0.05% |
+14,639
| New | +$578K |
|
|
DMND
369
DELISTED
DIAMOND FOODS, INC.
DMND
| $549K | 0.05% |
17,502
+16,195
| +1,239% | +$492K |
|
370
International Paper
IP
$20.2B
| $545K | 0.05% |
+12,094
| New | +$600K |
|
371
KLA
KLAC
$280B
| $545K | 0.05% |
97,000
-95,500
| -50% | -$558K |
|
372
CALL
NXP Semiconductors
NXPI
$70.4B
| $542K | 0.05% |
447
-121
| -21% | -$12.4K |
|
|
ALXN
373
DELISTED
Alexion Pharmaceuticals
ALXN
| $542K | 0.05% |
3,002
+133
| +5% | +$23K |
|
|
SHLD
374
PUT
DELISTED
Sears Holding Corporation
SHLD
| $540K | 0.05% |
896
-210
| -19% | -$8.1K |
|
375
PUT
Southwest Airlines
LUV
$23.3B
| $537K | 0.05% |
1,078
+889
| +470% | +$34.8K |
|
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.