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 | |
|---|---|---|---|---|---|---|
3176
CALL
Ball Corp
BALL
$17.2B
| $21K | ﹤0.01% |
550
-250
| -31% | -$9.33K |
|
3177
PUT
Banc of California
BANC
$3.21B
| $21K | ﹤0.01% |
502
-1,400
| -74% | -$26K |
|
3178
CACI
CACI
$11B
| $21K | ﹤0.01% |
180
-2,143
| -92% | -$267K |
|
3179
Chegg
CHGG
$110M
| $21K | ﹤0.01% |
+2,509
| New | +$19.3K |
|
3180
Coherent
COHR
$53.1B
| $21K | ﹤0.01% |
610
-3,505
| -85% | -$124K |
|
3181
CALL
Danaher
DHR
$138B
| $21K | ﹤0.01% |
131
-140
| -52% | -$10.4K |
|
3182
PUT
Diana Shipping
DSX
$274M
| $21K | ﹤0.01% |
+305
| New | +$859 |
|
3183
PUT
DexCom
DXCM
$28.3B
| $21K | ﹤0.01% |
552
+472
| +590% | +$9.21K |
|
3184
CALL
Eldorado Gold
EGO
$8.48B
| $21K | ﹤0.01% |
280
+131
| +88% | +$2.2K |
|
3185
CALL
FIVE9
FIVN
$1.96B
| $21K | ﹤0.01% |
545
+532
| +4,092% | +$8.73K |
|
3186
CALL
Fomento Económico Mexicano
FMX
$45B
| $21K | ﹤0.01% |
+150
| New | +$12.2K |
|
3187
PUT
Fortuna Silver Mines
FSM
$2.59B
| $21K | ﹤0.01% |
196
+148
| +308% | +$874 |
|
3188
PUT
Geron
GERN
$949M
| $21K | ﹤0.01% |
698
+433
| +163% | +$923 |
|
|
HEES
3189
CALL
DELISTED
H&E Equipment Services
HEES
| $21K | ﹤0.01% |
141
-236
| -63% | -$5.78K |
|
3190
CALL
Heritage Insurance Holdings
HRTG
$864M
| $21K | ﹤0.01% |
753
-159
| -17% | -$2.29K |
|
3191
PUT
Insmed
INSM
$22.7B
| $21K | ﹤0.01% |
735
+545
| +287% | +$8.4K |
|
|
IRBT
3192
PUT
DELISTED
iRobot
IRBT
| $21K | ﹤0.01% |
359
+329
| +1,097% | +$19.5K |
|
3193
PUT
Jack in the Box
JACK
$299M
| $21K | ﹤0.01% |
91
+51
| +128% | +$5.28K |
|
3194
Kimco Realty
KIM
$17.8B
| $21K | ﹤0.01% |
+992
| New | +$23.8K |
|
|
HAPN
3195
PUT
Happen Inc
HAPN
$2.16B
| $21K | ﹤0.01% |
16
-100
| -86% | -$2.84K |
|
3196
PUT
Marriott International
MAR
$101B
| $21K | ﹤0.01% |
588
-119
| -17% | -$10.3K |
|
3197
CALL
MSCI
MSCI
$41.5B
| $21K | ﹤0.01% |
87
+52
| +149% | +$4.71K |
|
3198
PUT
NextEra Energy
NEE
$185B
| $21K | ﹤0.01% |
588
+60
| +11% | +$1.89K |
|
|
ODP
3199
PUT
DELISTED
ODP
ODP
| $21K | ﹤0.01% |
69
+48
| +229% | +$2.17K |
|
3200
Omeros
OMER
$821M
| $21K | ﹤0.01% |
+1,400
| New | +$15.3K |
|
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.