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 | |
|---|---|---|---|---|---|---|
2276
CALL
Canadian National Railway
CNI
$78.3B
| $54K | ﹤0.01% |
140
+16
| +13% | +$1.14K |
|
2277
Commault Systems
CVLT
$5.89B
| $54K | ﹤0.01% |
1,073
+770
| +254% | +$39.3K |
|
2278
PUT
Enterprise Products Partners
EPD
$83.8B
| $54K | ﹤0.01% |
509
-400
| -44% | -$11.2K |
|
2279
PUT
Halozyme
HALO
$9.72B
| $54K | ﹤0.01% |
242
-101
| -29% | -$1.28K |
|
2280
Harmony Gold Mining
HMY
$9.92B
| $54K | ﹤0.01% |
22,323
+22,136
| +11,837% | +$55.3K |
|
|
2281
iShares Biotechnology ETF
IBB
$9.31B
| $54K | ﹤0.01% |
561
-84,222
| -99% | -$8.06M |
|
2282
PUT
IDT Corp
IDT
$1.6B
| $54K | ﹤0.01% |
117
+102
| +680% | +$1.5K |
|
2283
PUT
International Paper
IP
$22.3B
| $54K | ﹤0.01% |
787
-836
| -52% | -$41.9K |
|
|
MAG
2284
DELISTED
MAG Silver
MAG
| $54K | ﹤0.01% |
4,126
-5,327
| -56% | -$75.5K |
|
|
MRSH
2285
CALL
Marsh
MRSH
$86.3B
| $54K | ﹤0.01% |
+165
| New | +$11.8K |
|
2286
Nokia
NOK
$50.8B
| $54K | ﹤0.01% |
9,968
-23,667
| -70% | -$119K |
|
2287
NetSol Technologies
NTWK
$51.7M
| $54K | ﹤0.01% |
+10,693
| New | +$54.5K |
|
2288
CALL
Molson Coors Class B
TAP
$7.68B
| $54K | ﹤0.01% |
488
-177
| -27% | -$17.3K |
|
|
TGI
2289
DELISTED
Triumph Group
TGI
| $54K | ﹤0.01% |
2,119
-1,900
| -47% | -$49.8K |
|
2290
Waterstone Financial
WSBF
$362M
| $54K | ﹤0.01% |
2,980
+2,785
| +1,428% | +$50.9K |
|
2291
CALL
Ziff Davis
ZD
$1.9B
| $54K | ﹤0.01% |
170
+129
| +315% | +$9.43K |
|
|
XYZ
2292
CALL
Block Inc
XYZ
$45.9B
| $54K | ﹤0.01% |
250
+6
| +2% | +$94 |
|
|
TELL
2293
CALL
DELISTED
Tellurian Inc.
TELL
| $54K | ﹤0.01% |
+288
| New | +$3.71K |
|
|
CPLA
2294
CALL
DELISTED
Capella Education Company
CPLA
| $54K | ﹤0.01% |
56
+37
| +195% | +$3.03K |
|
|
WLB
2295
DELISTED
Westmoreland Coal Company
WLB
| $54K | ﹤0.01% |
+3,786
| New | +$60.3K |
|
|
CAA
2296
CALL
DELISTED
CalAtlantic Group, Inc.
CAA
| $54K | ﹤0.01% |
441
+251
| +132% | +$8.88K |
|
|
HYGS
2297
DELISTED
Hydrogenics Corp
HYGS
| $54K | ﹤0.01% |
8,206
+6,636
| +423% | +$39.1K |
|
|
RHT
2298
PUT
DELISTED
Red Hat Inc
RHT
| $54K | ﹤0.01% |
284
+138
| +95% | +$11K |
|
|
WES
2299
CALL
DELISTED
Western Gas Partners Lp
WES
| $54K | ﹤0.01% |
529
+365
| +223% | +$22.6K |
|
2300
CALL
Ashland
ASH
$3.04B
| $53K | ﹤0.01% |
+413
| New | +$23.9K |
|
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.