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 | |
|---|---|---|---|---|---|---|
|
ESRX
426
CALL
DELISTED
Express Scripts Holding Company
ESRX
| $8.28M | 0.03% |
872
+359
| +70% | +$30.6K |
|
427
CALL
Vanguard S&P 500 ETF
VOO
$979B
| $8.28M | 0.03% |
707
-608
| -46% | -$159K |
|
428
PUT
Herbalife
HLF
$1.26B
| $8.27M | 0.03% |
1,516
+47
| +3% | +$2.6K |
|
429
PUT
RH
RH
$3.31B
| $8.25M | 0.03% |
630
-141
| -18% | -$19.8K |
|
430
PUT
Vertex Pharmaceuticals
VRTX
$120B
| $8.25M | 0.03% |
428
-81
| -16% | -$14.4K |
|
431
CALL
iQIYI
IQ
$1.2B
| $8.24M | 0.03% |
3,044
-1,081
| -26% | -$32.2K |
|
432
CALL
XPO
XPO
$25.1B
| $8.23M | 0.03% |
2,085
-393
| -16% | -$14.3K |
|
433
PUT
American Airlines Group
AAL
$9.78B
| $8.2M | 0.03% |
1,984
-103
| -5% | -$4.03K |
|
434
Booking.com
BKNG
$138B
| $8.18M | 0.03% |
+103,025
| New | +$8.11M |
|
435
ProShares UltraPro QQQ
TQQQ
$34.1B
| $8.17M | 0.03% |
919,304
+492,936
| +116% | +$4.08M |
|
|
SODA
436
CALL
DELISTED
SodaStream International Ltd
SODA
| $8.17M | 0.03% |
571
+246
| +76% | +$29.6K |
|
437
CALL
T-Mobile US
TMUS
$207B
| $8.17M | 0.03% |
1,164
+920
| +377% | +$59.1K |
|
438
Home Depot
HD
$330B
| $8.16M | 0.03% |
+39,379
| New | +$7.93M |
|
439
PUT
Equinix
EQIX
$101B
| $8.14M | 0.03% |
188
-73
| -28% | -$32K |
|
440
CALL
Workday
WDAY
$32.7B
| $8.12M | 0.03% |
556
-15
| -3% | -$2.08K |
|
441
CALL
Paychex
PAYX
$39.4B
| $8.06M | 0.03% |
1,095
+468
| +75% | +$33.6K |
|
442
PUT
ProShares Ultra S&P500
SSO
$8.02B
| $8.04M | 0.03% |
5,960
-2,664
| -31% | -$40.7K |
|
443
PUT
Macy's
M
$6.4B
| $7.85M | 0.03% |
2,261
-714
| -24% | -$26.6K |
|
|
APC
444
PUT
DELISTED
Anadarko Petroleum
APC
| $7.8M | 0.03% |
1,157
+705
| +156% | +$47.6K |
|
445
PUT
Old Dominion Freight Line
ODFL
$48.4B
| $7.79M | 0.03% |
1,449
+1,161
| +403% | +$58.8K |
|
446
CALL
Estee Lauder
EL
$29.9B
| $7.76M | 0.02% |
534
+229
| +75% | +$31.8K |
|
447
PUT
Pfizer
PFE
$141B
| $7.76M | 0.02% |
1,856
-39
| -2% | -$1.5K |
|
448
PUT
Viatris
VTRS
$19.8B
| $7.72M | 0.02% |
2,109
+783
| +59% | +$29.4K |
|
|
GRUB
449
CALL
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
| $7.69M | 0.02% |
278
+186
| +202% | +$48K |
|
450
PUT
Norfolk Southern
NSC
$74.3B
| $7.69M | 0.02% |
426
+188
| +79% | +$32.1K |
|
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.