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 | |
|---|---|---|---|---|---|---|
1326
Cadiz
CDZI
$266M
| $172K | 0.01% |
+11,470
| New | +$160K |
|
1327
PUT
PayPal
PYPL
$49.5B
| $172K | 0.01% |
1,831
+230
| +14% | +$9.62K |
|
1328
Ross Stores
ROST
$76.6B
| $172K | 0.01% |
+2,613
| New | +$175K |
|
|
VMW
1329
PUT
DELISTED
VMware, Inc
VMW
| $172K | 0.01% |
1,348
+443
| +49% | +$39K |
|
|
ALR
1330
CALL
DELISTED
Alere Inc
ALR
| $172K | 0.01% |
664
+37
| +6% | +$1.44K |
|
1331
PUT
Agnico Eagle Mines
AEM
$72.6B
| $171K | 0.01% |
722
+576
| +395% | +$25.9K |
|
|
EXAS
1332
DELISTED
Exact Sciences
EXAS
| $171K | 0.01% |
+7,253
| New | +$144K |
|
1333
Generac Holdings
GNRC
$11.9B
| $171K | 0.01% |
+4,603
| New | +$182K |
|
1334
Abercrombie & Fitch
ANF
$4.17B
| $170K | 0.01% |
+14,325
| New | +$170K |
|
1335
PUT
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$105M
| $170K | 0.01% |
1,257
+275
| +28% | +$5.58K |
|
1336
CALL
Five Below
FIVE
$11.2B
| $170K | 0.01% |
544
+388
| +249% | +$15.4K |
|
1337
Genesco
GCO
$396M
| $170K | 0.01% |
+3,072
| New | +$183K |
|
1338
PUT
Molson Coors Class B
TAP
$7.68B
| $170K | 0.01% |
512
-100
| -16% | -$9.76K |
|
1339
Atlassian
TEAM
$22B
| $170K | 0.01% |
5,680
+83
| +1% | +$2.34K |
|
|
LOGM
1340
DELISTED
LogMein, Inc.
LOGM
| $170K | 0.01% |
+1,751
| New | +$174K |
|
|
BGFV
1341
DELISTED
Big 5 Sporting Goods
BGFV
| $169K | 0.01% |
+11,212
| New | +$170K |
|
1342
CALL
Banco Macro
BMA
$5.7B
| $169K | 0.01% |
184
+125
| +212% | +$9.93K |
|
1343
Bruker
BRKR
$9.2B
| $169K | 0.01% |
+7,275
| New | +$171K |
|
1344
Century Communities
CCS
$2B
| $169K | 0.01% |
+6,678
| New | +$155K |
|
1345
PUT
eBay
EBAY
$48.6B
| $169K | 0.01% |
1,365
+2
| +0.1% | +$65 |
|
|
BCPC
1346
Balchem Corp
BCPC
$5.23B
| $169K | 0.01% |
+2,060
| New | +$173K |
|
|
NYMX
1347
DELISTED
Nymox Pharmaceutical Corp
NYMX
| $169K | 0.01% |
46,723
+41,861
| +861% | +$138K |
|
1348
Barclays
BCS
$94.1B
| $168K | 0.01% |
15,773
+10,169
| +181% | +$109K |
|
1349
PUT
United Rentals
URI
$71.1B
| $167K | 0.01% |
475
-140
| -23% | -$17K |
|
1350
CALL
United States Oil Fund
USO
$2.45B
| $167K | 0.01% |
791
+147
| +23% | +$13K |
|
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.