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 | |
|---|---|---|---|---|---|---|
|
ONCE
1176
DELISTED
Spark Therapeutics, Inc. Common Stock
ONCE
| $212K | 0.01% |
3,986
+3,857
| +2,990% | +$229K |
|
|
APLP
1177
DELISTED
Archrock Partners, L.P. Common Units representing Limited Partner Interests
APLP
| $212K | 0.01% |
12,392
+10,582
| +585% | +$184K |
|
|
ABCO
1178
DELISTED
Advisory Board Co
ABCO
| $212K | 0.01% |
4,546
-1,597
| -26% | -$70.5K |
|
1179
PUT
Oracle
ORCL
$342B
| $211K | 0.01% |
1,760
-1,483
| -46% | -$61.7K |
|
1180
CALL
Howmet Aerospace
HWM
$116B
| $210K | 0.01% |
2,819
+1,312
| +87% | +$25.8K |
|
|
CAI
1181
CALL
DELISTED
CAI International, Inc.
CAI
| $210K | 0.01% |
+255
| New | +$3.71K |
|
1182
CALL
Incyte
INCY
$23.5B
| $208K | 0.01% |
304
+73
| +32% | +$9.29K |
|
1183
PUT
KB Home
KBH
$3.51B
| $208K | 0.01% |
1,778
+1,480
| +497% | +$25.9K |
|
|
1184
PUT
Eli Lilly
LLY
$1.07T
| $208K | 0.01% |
1,207
-3,084
| -72% | -$247K |
|
1185
Valmont Industries
VMI
$9.41B
| $208K | 0.01% |
1,344
-808
| -38% | -$119K |
|
|
TRTN
1186
DELISTED
Triton International Limited
TRTN
| $208K | 0.01% |
8,095
-6,604
| -45% | -$153K |
|
1187
Archrock
AROC
$6.59B
| $207K | 0.01% |
+16,723
| New | +$235K |
|
1188
Carpenter Technology
CRS
$30.1B
| $207K | 0.01% |
5,557
+5,391
| +3,248% | +$210K |
|
1189
CALL
HSBC
HSBC
$355B
| $207K | 0.01% |
1,926
+1,474
| +326% | +$55.4K |
|
1190
CALL
John B. Sanfilippo & Son
JBSS
$957M
| $207K | 0.01% |
218
+216
| +10,800% | +$14.2K |
|
1191
Puma Biotechnology
PBYI
$411M
| $207K | 0.01% |
+5,591
| New | +$204K |
|
|
NUVA
1192
DELISTED
NuVasive, Inc.
NUVA
| $207K | 0.01% |
2,777
+2,159
| +349% | +$157K |
|
1193
PUT
Kraft Heinz
KHC
$30.3B
| $206K | 0.01% |
2,708
+1,916
| +242% | +$173K |
|
1194
iShares MSCI Mexico ETF
EWW
$1.89B
| $205K | 0.01% |
4,018
-14,796
| -79% | -$687K |
|
1195
Pan American Silver
PAAS
$18.8B
| $205K | 0.01% |
11,716
-4,329
| -27% | -$78.7K |
|
1196
PUT
Tenet Healthcare
THC
$20.8B
| $204K | 0.01% |
1,945
+1,439
| +284% | +$26.7K |
|
1197
United States Natural Gas Fund
UNG
$478M
| $203K | 0.01% |
1,684
-1,232
| -42% | -$149K |
|
|
CBI
1198
PUT
DELISTED
Chicago Bridge & Iron Nv
CBI
| $203K | 0.01% |
992
+587
| +145% | +$18.9K |
|
|
WW
1199
DELISTED
WW International
WW
| $202K | 0.01% |
+12,997
| New | +$179K |
|
1200
PUT
CF Industries
CF
$19.1B
| $201K | 0.01% |
1,423
-367
| -21% | -$12K |
|
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.