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 | Communication Services | 0.49% |
| 2 | Consumer Discretionary | 0.48% |
| 3 | Technology | 0.4% |
| 4 | Financials | 0.25% |
| 5 | Industrials | 0.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
301
CALL
SLB Ltd
SLB
$71.3B
| $11.8M | 0.03% |
3,258
+1,371
| +73% | +$67.6K |
|
302
PUT
Marriott International
MAR
$97.5B
| $11.7M | 0.03% |
1,081
+289
| +36% | +$33.2K |
|
303
PUT
eBay
EBAY
$49.3B
| $11.7M | 0.03% |
4,178
+2,331
| +126% | +$68.5K |
|
304
PUT
General Motors
GM
$74.1B
| $11.7M | 0.03% |
3,492
+482
| +16% | +$16.6K |
|
305
CALL
Western Digital
WDC
$192B
| $11.7M | 0.03% |
4,174
+1,461
| +54% | +$51.8K |
|
306
CALL
Medtronic
MDT
$105B
| $11.6M | 0.03% |
1,272
+80
| +7% | +$7.48K |
|
307
PUT
Accenture
ACN
$85.7B
| $11.5M | 0.03% |
816
+20
| +3% | +$3.16K |
|
308
PUT
Ferrari
RACE
$65.4B
| $11.5M | 0.03% |
1,157
+721
| +165% | +$81K |
|
309
CALL
GE Aerospace
GE
$354B
| $11.5M | 0.03% |
3,170
+2,438
| +333% | +$110K |
|
310
PUT
Vanguard S&P 500 ETF
VOO
$979B
| $11.5M | 0.03% |
1,242
+320
| +35% | +$79.3K |
|
311
CALL
ConocoPhillips
COP
$145B
| $11.2M | 0.03% |
1,790
-134
| -7% | -$9.12K |
|
312
PUT
Macy's
M
$6.4B
| $11.1M | 0.03% |
3,713
+1,452
| +64% | +$47.8K |
|
313
CALL
PNC Financial Services
PNC
$101B
| $11M | 0.03% |
945
+414
| +78% | +$52.8K |
|
314
PUT
Norfolk Southern
NSC
$74.3B
| $11M | 0.03% |
738
+312
| +73% | +$51.3K |
|
315
CALL
Altria Group
MO
$121B
| $11M | 0.03% |
2,225
-123
| -5% | -$7.13K |
|
316
PUT
Kohl's
KSS
$2.16B
| $10.9M | 0.03% |
1,649
-622
| -27% | -$43.7K |
|
317
CALL
Teva Pharmaceuticals
TEVA
$35.1B
| $10.9M | 0.03% |
7,060
+3,027
| +75% | +$62.1K |
|
318
CALL
S&P Global
SPGI
$127B
| $10.8M | 0.03% |
637
+87
| +16% | +$15.6K |
|
|
SPLK
319
PUT
DELISTED
Splunk Inc
SPLK
| $10.8M | 0.03% |
1,030
+123
| +14% | +$12.4K |
|
320
PUT
Charter Communications
CHTR
$15.9B
| $10.7M | 0.03% |
375
-133
| -26% | -$41.7K |
|
321
CALL
Universal Display
OLED
$3.81B
| $10.7M | 0.03% |
1,140
+232
| +26% | +$23.4K |
|
322
CALL
XPO
XPO
$25.1B
| $10.6M | 0.03% |
5,358
+3,273
| +157% | +$90.7K |
|
|
XLNX
323
CALL
DELISTED
Xilinx Inc
XLNX
| $10.5M | 0.03% |
1,234
+676
| +121% | +$56.5K |
|
|
324
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
$3.47B
| $10.5M | 0.03% |
98,989
+91,217
| +1,174% | +$12.7M |
|
|
DNB
325
PUT
DELISTED
Dun & Bradstreet
DNB
| $10.5M | 0.03% |
735
+316
| +75% | +$45.1K |
|
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 1,573 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 Communication Services at 0.49% of assets, down from 0.89% a quarter earlier, followed by Consumer Discretionary and Technology.
- 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 1,573 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.