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 | Miscellaneous | 39.75% |
| 2 | Technology | 9.92% |
| 3 | Communication Services | 9.47% |
| 4 | Consumer Discretionary | 9.11% |
| 5 | Healthcare | 8.95% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1351
State Street SPDR S&P Retail ETF
XRT
$278M
| $167K | 0.01% |
+3,962
| New | +$170K |
|
1352
Boot Barn
BOOT
$4.61B
| $166K | 0.01% |
16,858
+15,845
| +1,564% | +$171K |
|
1353
Caesarstone
CSTE
$108M
| $166K | 0.01% |
4,601
+1,179
| +34% | +$38K |
|
1354
PUT
Edwards Lifesciences
EW
$50B
| $166K | 0.01% |
1,095
+480
| +78% | +$15K |
|
|
ESV
1355
PUT
DELISTED
Ensco Rowan plc
ESV
| $166K | 0.01% |
41
-83
| -67% | -$3.37K |
|
1356
PUT
Pan American Silver
PAAS
$21.4B
| $165K | 0.01% |
803
+8
| +1% | +$145 |
|
1357
PUT
Alcoa
AA
$13.7B
| $164K | 0.01% |
894
+798
| +831% | +$27.9K |
|
1358
CALL
Adient
ADNT
$1.46B
| $164K | 0.01% |
562
+551
| +5,009% | +$36.2K |
|
|
BPMC
1359
DELISTED
Blueprint Medicines
BPMC
| $164K | 0.01% |
+4,106
| New | +$147K |
|
1360
PUT
Comstock Resources
CRK
$4.5B
| $164K | 0.01% |
1,089
+784
| +257% | +$7.92K |
|
1361
iShares MSCI Singapore ETF
EWS
$1.29B
| $164K | 0.01% |
7,233
+6,536
| +938% | +$143K |
|
|
SA
1362
Seabridge Gold
SA
$3.45B
| $164K | 0.01% |
+14,979
| New | +$156K |
|
1363
CALL
Sprouts Farmers Market
SFM
$7.1B
| $164K | 0.01% |
575
+333
| +138% | +$6.53K |
|
1364
PUT
iShares Silver Trust
SLV
$32.1B
| $164K | 0.01% |
1,447
+140
| +11% | +$2.32K |
|
1365
ProShares Ultra Bloomberg Crude Oil
UCO
$445M
| $164K | 0.01% |
+1,380
| New | +$179K |
|
1366
CALL
Albemarle
ALB
$15.1B
| $163K | 0.01% |
140
-197
| -58% | -$19.2K |
|
1367
CALL
Builders FirstSource
BLDR
$6.82B
| $163K | 0.01% |
575
+127
| +28% | +$1.64K |
|
1368
PUT
3M
MMM
$85.7B
| $163K | 0.01% |
2,167
-774
| -26% | -$119K |
|
1369
Primerica
PRI
$8.99B
| $163K | 0.01% |
+1,989
| New | +$155K |
|
1370
PUT
Zoetis
ZTS
$30.7B
| $163K | 0.01% |
533
-8
| -1% | -$432 |
|
|
CCMP
1371
DELISTED
CMC Materials, Inc. Common Stock
CCMP
| $163K | 0.01% |
2,135
-4,137
| -66% | -$284K |
|
|
SODA
1372
DELISTED
SodaStream International Ltd
SODA
| $163K | 0.01% |
3,375
-6,599
| -66% | -$300K |
|
1373
Apollo Global Management
APO
$79.1B
| $162K | 0.01% |
6,663
-9,154
| -58% | -$204K |
|
1374
CALL
Baxter International
BAX
$12.9B
| $162K | 0.01% |
624
-168
| -21% | -$8.26K |
|
1375
CALL
BP
BP
$115B
| $162K | 0.01% |
2,214
-1,241
| -36% | -$37.7K |
|
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 $539M 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 Miscellaneous at 40% of assets, down from 51% a quarter earlier, followed by Technology and Communication Services.
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 1,368 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.