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 |
iShares Russell 2000 ETF
IWM
|
+$58.5M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$56.5M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$44.1M |
| 4 |
Apple
AAPL
|
+$20.3M |
| 5 |
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
|
+$12.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$109M |
| 2 |
Meta Platforms (Facebook)
META
|
+$62.3M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$36.2M |
| 4 |
Goldman Sachs
GS
|
+$27.1M |
| 5 |
Boeing
BA
|
+$24.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 97.5% |
| 2 | Communication Services | 0.5% |
| 3 | Consumer Discretionary | 0.49% |
| 4 | Technology | 0.41% |
| 5 | Financials | 0.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
326
PUT
American Airlines Group
AAL
$8.69B
| $10.5M | 0.03% |
3,262
+1,278
| +64% | +$44.5K |
|
327
PUT
Expedia Group
EXPE
$35.8B
| $10.4M | 0.03% |
927
+339
| +58% | +$40.6K |
|
328
CALL
Royal Caribbean
RCL
$70.9B
| $10.4M | 0.03% |
1,065
-125
| -11% | -$13.7K |
|
329
PUT
American International
AIG
$39.8B
| $10.4M | 0.03% |
2,640
+978
| +59% | +$42.7K |
|
330
CALL
Best Buy
BBY
$19B
| $10.4M | 0.03% |
1,960
+663
| +51% | +$43.3K |
|
331
PUT
NetEase
NTES
$76.4B
| $10.4M | 0.03% |
2,200
-795
| -27% | -$35.9K |
|
332
CALL
ServiceNow
NOW
$146B
| $10.3M | 0.03% |
2,900
-845
| -23% | -$30K |
|
333
PUT
Kraft Heinz
KHC
$29.5B
| $10.3M | 0.03% |
2,392
-336
| -12% | -$17.4K |
|
334
CALL
RH
RH
$2.8B
| $10.3M | 0.03% |
858
+129
| +18% | +$15.5K |
|
335
CALL
Invesco CurrencyShares Euro Currency Trust
FXE
$370M
| $10.3M | 0.03% |
938
-418
| -31% | -$45.6K |
|
336
PUT
AB InBev
BUD
$158B
| $10.2M | 0.03% |
1,555
+316
| +26% | +$24.2K |
|
337
CALL
lululemon athletica
LULU
$11.1B
| $10.2M | 0.03% |
841
-5
| -0.6% | -$670 |
|
338
CALL
Vanguard FTSE Europe ETF
VGK
$31.1B
| $10.2M | 0.03% |
2,313
+546
| +31% | +$28.1K |
|
339
PUT
Cboe Global Markets
CBOE
$31.2B
| $10.2M | 0.03% |
1,042
+517
| +98% | +$53.8K |
|
340
PUT
Microchip Technology
MCHP
$40.3B
| $10.2M | 0.03% |
2,826
+2,132
| +307% | +$75.3K |
|
|
TSRO
341
PUT
DELISTED
TESARO, Inc.
TSRO
| $10.1M | 0.03% |
1,367
+927
| +211% | +$44.5K |
|
342
CALL
Duke Energy
DUK
$93.7B
| $10M | 0.03% |
1,162
-18
| -2% | -$1.53K |
|
343
CALL
Southwest Airlines
LUV
$19.4B
| $10M | 0.03% |
2,155
-807
| -27% | -$42.9K |
|
344
PUT
EOG Resources
EOG
$76.2B
| $10M | 0.03% |
1,148
-180
| -14% | -$19.3K |
|
345
PUT
Herbalife
HLF
$1.3B
| $9.92M | 0.03% |
1,683
+167
| +11% | +$9.22K |
|
346
PUT
Las Vegas Sands
LVS
$28.7B
| $9.83M | 0.03% |
1,888
-1,180
| -38% | -$64K |
|
347
CALL
Workday
WDAY
$47.2B
| $9.82M | 0.03% |
615
+59
| +11% | +$8.36K |
|
348
PUT
Vertex Pharmaceuticals
VRTX
$138B
| $9.81M | 0.03% |
592
+164
| +38% | +$28.4K |
|
|
RTN
349
PUT
DELISTED
Raytheon Company
RTN
| $9.69M | 0.03% |
632
+80
| +14% | +$14.3K |
|
350
CALL
Mercado Libre
MELI
$100B
| $9.61M | 0.03% |
328
+105
| +47% | +$34K |
|
Similar funds
Simplex Trading's Q4 2018 Portfolio in Review
As of Q4 2018, Simplex Trading held 8,576 positions worth $34.1B, up 9.5% from $31.1B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q4 2018 filing shows 1,199 new, 2,701 increased, 2,877 reduced and 1,572 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M. The largest sale was Amazon, an estimated $109M.
By sector, the portfolio is most concentrated in Miscellaneous at 97% of assets, up from 95% a quarter earlier, followed by Communication Services and Consumer Discretionary.
- Simplex Trading's largest Q4 2018 buy was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q4 2018, an estimated $58.5M increase.
- Simplex Trading's biggest Q4 2018 reduction was Amazon, cutting an estimated $109M.
- Simplex Trading fully exited Meta Platforms (Facebook) in Q4 2018, selling an estimated $62.3M.
- Simplex Trading's ten largest holdings make up 43% of its $34.1B portfolio in Q4 2018.
- Simplex Trading opened 1,199 new positions and closed 1,572 in Q4 2018.
- Simplex Trading's portfolio value rose 9.5% quarter-over-quarter to $34.1B.
Based on Simplex Trading's 13F filing for Q4 2018, filed 16 Jan 2019.