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 |
Goldman Sachs
GS
|
+$40.4M |
| 2 |
NVIDIA
NVDA
|
+$23.1M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.5M |
| 4 |
Wells Fargo
WFC
|
+$20.8M |
| 5 |
Micron Technology
MU
|
+$20M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Citigroup
C
|
+$21.4M |
| 2 |
Apple
AAPL
|
+$15.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$14.4M |
| 4 |
Eli Lilly
LLY
|
+$10.5M |
| 5 |
iShares Biotechnology ETF
IBB
|
+$8.06M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 9.73% |
| 2 | Communication Services | 9.25% |
| 3 | Consumer Discretionary | 8.76% |
| 4 | Healthcare | 8.53% |
| 5 | Financials | 7.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1076
The GEO Group
GEO
$4.15B
| $250K | 0.01% |
+8,100
| New | +$233K |
|
|
IRBT
1077
DELISTED
iRobot
IRBT
| $250K | 0.01% |
+3,781
| New | +$224K |
|
1078
CALL
Hain Celestial
HAIN
$49.1M
| $249K | 0.01% |
1,541
+942
| +157% | +$35.4K |
|
1079
PUT
Honeywell
HON
$78B
| $249K | 0.01% |
2,072
-937
| -31% | -$103K |
|
|
ACOR
1080
PUT
DELISTED
Acorda Therapeutics
ACOR
| $249K | 0.01% |
20
+11
| +122% | +$31.7K |
|
1081
Churchill Downs
CHDN
$5.84B
| $248K | 0.01% |
9,372
-4,482
| -32% | -$112K |
|
1082
Comfort Systems
FIX
$64.5B
| $248K | 0.01% |
+6,775
| New | +$235K |
|
|
TFCF
1083
DELISTED
Twenty-First Century Fox, Inc. Class B
TFCF
| $248K | 0.01% |
7,808
+5,789
| +287% | +$174K |
|
1084
Henry Schein
HSIC
$9.63B
| $247K | 0.01% |
3,720
-2,744
| -42% | -$178K |
|
|
NE
1085
PUT
DELISTED
Noble Corporation
NE
| $247K | 0.01% |
983
+365
| +59% | +$2.46K |
|
|
FMI
1086
CALL
DELISTED
Foundation Medicine, Inc.
FMI
| $247K | 0.01% |
499
-38
| -7% | -$948 |
|
1087
CALL
Applied Optoelectronics
AAOI
$8.99B
| $246K | 0.01% |
158
-131
| -45% | -$5.17K |
|
1088
CALL
Aptiv
APTV
$11.9B
| $246K | 0.01% |
1,162
+1,002
| +626% | +$75.2K |
|
1089
CALL
Galicia Financial Group
GGAL
$8.06B
| $246K | 0.01% |
610
+567
| +1,319% | +$19K |
|
1090
PUT
PepsiCo
PEP
$184B
| $245K | 0.01% |
2,990
-184
| -6% | -$19.7K |
|
|
MDCO
1091
PUT
DELISTED
Medicines Co
MDCO
| $245K | 0.01% |
701
+505
| +258% | +$23K |
|
|
TSRO
1092
CALL
DELISTED
TESARO, Inc.
TSRO
| $245K | 0.01% |
434
+34
| +9% | +$5.54K |
|
1093
PUT
EOG Resources
EOG
$77.5B
| $244K | 0.01% |
712
-343
| -33% | -$34.2K |
|
1094
CALL
CME Group
CME
$91.9B
| $243K | 0.01% |
576
+295
| +105% | +$35.5K |
|
|
ESPR
1095
CALL
DELISTED
Esperion Therapeutics
ESPR
| $243K | 0.01% |
391
+335
| +598% | +$7.67K |
|
1096
PUT
Williams Companies
WMB
$92B
| $243K | 0.01% |
1,960
+1,453
| +287% | +$42K |
|
1097
CALL
Teva Pharmaceuticals
TEVA
$36.3B
| $242K | 0.01% |
2,679
-1,412
| -35% | -$48.2K |
|
|
SVU
1098
DELISTED
SUPERVALU Inc.
SVU
| $242K | 0.01% |
8,968
+8,162
| +1,013% | +$223K |
|
1099
PUT
CSX Corp
CSX
$98.1B
| $241K | 0.01% |
6,750
+4,365
| +183% | +$66.5K |
|
1100
HF Sinclair
DINO
$16.1B
| $241K | 0.01% |
+8,525
| New | +$249K |
|
Similar funds
Simplex Trading's Q1 2017 Portfolio in Review
As of Q1 2017, Simplex Trading held 7,485 positions worth $2.31B, up 38% from $1.67B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading deployed $551M of net new capital in Q1 2017, opening 1,662 new positions and adding to 2,374 existing holdings. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
By sector, the portfolio is most concentrated in Technology at 9.7% of assets, up from 7.2% a quarter earlier, followed by Communication Services and Consumer Discretionary.
On the sell side, the largest reduction was Citigroup, an estimated $21.4M trimmed.
- Simplex Trading's largest Q1 2017 buy was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
- Simplex Trading added most to Goldman Sachs in Q1 2017, an estimated $40.4M increase.
- Simplex Trading's biggest Q1 2017 reduction was Citigroup, cutting an estimated $21.4M.
- Simplex Trading fully exited Invesco QQQ Trust in Q1 2017, selling an estimated $14.4M.
- Simplex Trading's ten largest holdings make up 18% of its $2.31B portfolio in Q1 2017.
- Simplex Trading opened 1,662 new positions and closed 1,369 in Q1 2017.
- Simplex Trading's portfolio value rose 38% quarter-over-quarter to $2.31B.
Based on Simplex Trading's 13F filing for Q1 2017, filed 21 Apr 2017.