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 |
Amazon
AMZN
|
+$148M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$67.3M |
| 3 |
Meta Platforms (Facebook)
META
|
+$63.2M |
| 4 |
Goldman Sachs
GS
|
+$23.9M |
| 5 |
Citigroup
C
|
+$23.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Berkshire Hathaway Class B
BRK.B
|
+$47.5M |
| 2 |
Apple
AAPL
|
+$46M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$44.5M |
| 4 |
Micron Technology
MU
|
+$29.1M |
| 5 |
Adobe
ADBE
|
+$22.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 1.13% |
| 2 | Communication Services | 0.89% |
| 3 | Technology | 0.68% |
| 4 | Industrials | 0.51% |
| 5 | Healthcare | 0.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
301
CALL
Regeneron Pharmaceuticals
REGN
$68.2B
| $12.4M | 0.04% |
308
-79
| -20% | -$30.1K |
|
|
UWC
302
CALL
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $12.4M | 0.04% |
1,978
-606
| -23% | -$3.8M |
|
303
CALL
American Express
AXP
$233B
| $12.2M | 0.04% |
1,150
-737
| -39% | -$76.7K |
|
|
IRBT
304
PUT
DELISTED
iRobot
IRBT
| $12.1M | 0.04% |
1,103
+580
| +111% | +$54.6K |
|
|
X
305
PUT
DELISTED
US Steel
X
| $12.1M | 0.04% |
3,960
-2,522
| -39% | -$81.4K |
|
306
PUT
Intel
INTC
$504B
| $12.1M | 0.04% |
2,552
-33
| -1% | -$1.61K |
|
307
CALL
Western Digital
WDC
$195B
| $12M | 0.04% |
2,713
+18
| +0.7% | +$912 |
|
308
CALL
Expedia Group
EXPE
$30.6B
| $11.9M | 0.04% |
913
+539
| +144% | +$70K |
|
309
JD.com
JD
$40.6B
| $11.9M | 0.04% |
454,620
+203,373
| +81% | +$6.66M |
|
310
PUT
Thermo Fisher Scientific
TMO
$213B
| $11.8M | 0.04% |
485
-19
| -4% | -$4.37K |
|
|
GRUB
311
PUT
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
| $11.8M | 0.04% |
425
+328
| +338% | +$84.6K |
|
312
CALL
Medtronic
MDT
$105B
| $11.7M | 0.04% |
1,192
-195
| -14% | -$18K |
|
313
PUT
American Tower
AMT
$77.2B
| $11.7M | 0.04% |
806
-560
| -41% | -$82.1K |
|
314
CALL
Abbott
ABT
$175B
| $11.7M | 0.04% |
1,590
-257
| -14% | -$16.9K |
|
315
PUT
McKesson
MCK
$95.5B
| $11.6M | 0.04% |
873
+505
| +137% | +$65.9K |
|
316
PUT
Carnival Corporation Ltd
CCL
$34.9B
| $11.5M | 0.04% |
1,810
+80
| +5% | +$4.85K |
|
317
PUT
Eli Lilly
LLY
$1.06T
| $11.5M | 0.04% |
1,073
+668
| +165% | +$66.8K |
|
318
PUT
Mercado Libre
MELI
$90.9B
| $11.5M | 0.04% |
338
+72
| +27% | +$24.4K |
|
319
CALL
SLB Ltd
SLB
$70.8B
| $11.5M | 0.04% |
1,887
-593
| -24% | -$38.2K |
|
320
CALL
Twilio
TWLO
$27.5B
| $11.5M | 0.04% |
1,330
+410
| +45% | +$30K |
|
|
CTXS
321
PUT
DELISTED
Citrix Systems Inc
CTXS
| $11.5M | 0.04% |
1,031
+408
| +65% | +$45.1K |
|
322
CALL
Valero Energy
VLO
$91.8B
| $11.4M | 0.04% |
1,004
-788
| -44% | -$89.5K |
|
|
RTN
323
PUT
DELISTED
Raytheon Company
RTN
| $11.4M | 0.04% |
552
-40
| -7% | -$7.96K |
|
324
CALL
TJX Companies
TJX
$169B
| $11.4M | 0.04% |
2,036
+534
| +36% | +$27.4K |
|
325
Caterpillar
CAT
$414B
| $11.4M | 0.04% |
74,592
-70,608
| -49% | -$9.99M |
|
Similar funds
Simplex Trading's Q3 2018 Portfolio in Review
As of Q3 2018, Simplex Trading held 8,699 positions worth $31.1B, up 22% from $25.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q3 2018 filing shows 1,336 new, 3,066 increased, 2,755 reduced and 1,315 closed positions. Its largest new stake was Invesco QQQ Trust: 371,806 shares worth $69.1M. The largest sale was Berkshire Hathaway Class B, an estimated $47.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 1.1% of assets, up from 0.92% a quarter earlier, followed by Communication Services and Technology.
- Simplex Trading's largest Q3 2018 buy was Invesco QQQ Trust: 371,806 shares worth $69.1M.
- Simplex Trading added most to Amazon in Q3 2018, an estimated $148M increase.
- Simplex Trading's biggest Q3 2018 reduction was Apple, cutting an estimated $46M.
- Simplex Trading fully exited Berkshire Hathaway Class B in Q3 2018, selling an estimated $47.5M.
- Simplex Trading's ten largest holdings make up 34% of its $31.1B portfolio in Q3 2018.
- Simplex Trading opened 1,336 new positions and closed 1,315 in Q3 2018.
- Simplex Trading's portfolio value rose 22% quarter-over-quarter to $31.1B.
Based on Simplex Trading's 13F filing for Q3 2018, filed 23 Oct 2018.