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 |
Apple
AAPL
|
+$34.5M |
| 2 |
Micron Technology
MU
|
+$33.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
+$30.8M |
| 4 |
NVIDIA
NVDA
|
+$23.5M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$22.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
TWX
Time Warner Inc
TWX
|
+$34.8M |
| 2 |
Amazon
AMZN
|
+$31.2M |
| 3 |
Tesla
TSLA
|
+$17.6M |
| 4 |
Netflix
NFLX
|
+$15.5M |
| 5 |
Advanced Micro Devices
AMD
|
+$12.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 1.23% |
| 2 | Consumer Discretionary | 0.92% |
| 3 | Communication Services | 0.73% |
| 4 | Financials | 0.62% |
| 5 | Industrials | 0.6% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
ESRX
501
PUT
DELISTED
Express Scripts Holding Company
ESRX
| $5.93M | 0.02% |
768
-881
| -53% | -$66.1K |
|
502
PUT
TripAdvisor
TRIP
$1.61B
| $5.89M | 0.02% |
1,057
+340
| +47% | +$16.2K |
|
503
PUT
ServiceNow
NOW
$98.4B
| $5.88M | 0.02% |
1,705
+630
| +59% | +$21.8K |
|
504
Delta Air Lines
DAL
$54.9B
| $5.87M | 0.02% |
118,518
+38,818
| +49% | +$2.07M |
|
|
SCHW
505
PUT
Charles Schwab
SCHW
$175B
| $5.87M | 0.02% |
1,148
+555
| +94% | +$30.7K |
|
506
CALL
New Oriental
EDU
$7.75B
| $5.84M | 0.02% |
617
-88
| -12% | -$8.42K |
|
507
PUT
Oneok
OKE
$57.8B
| $5.78M | 0.02% |
828
+656
| +381% | +$42.2K |
|
|
JOYY
508
PUT
JOYY Inc
JOYY
$3.65B
| $5.77M | 0.02% |
574
+144
| +33% | +$15K |
|
509
CALL
Dell
DELL
$285B
| $5.76M | 0.02% |
2,427
+966
| +66% | +$21.3K |
|
|
TYNS
510
CALL
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $5.75M | 0.02% |
975
+291
| +43% | +$8.51K |
|
|
TYNS
511
PUT
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $5.74M | 0.02% |
930
-369
| -28% | -$10.8K |
|
512
CALL
Marriott International
MAR
$97.5B
| $5.73M | 0.02% |
453
-546
| -55% | -$74.2K |
|
513
PUT
Campbell Soup
CPB
$6.52B
| $5.7M | 0.02% |
1,406
+580
| +70% | +$22.6K |
|
514
Nutanix
NTNX
$14.4B
| $5.68M | 0.02% |
110,235
+109,935
| +36,645% | +$6.04M |
|
515
CALL
Snap
SNAP
$7.52B
| $5.67M | 0.02% |
4,333
+1,424
| +49% | +$18.4K |
|
516
Bristol-Myers Squibb
BMY
$124B
| $5.67M | 0.02% |
102,411
-14,867
| -13% | -$803K |
|
517
CALL
Hilton Worldwide
HLT
$73.8B
| $5.65M | 0.02% |
714
+440
| +161% | +$35.8K |
|
518
PUT
TAL Education Group
TAL
$5.73B
| $5.63M | 0.02% |
1,531
+522
| +52% | +$20.5K |
|
519
PUT
Teva Pharmaceuticals
TEVA
$35.1B
| $5.63M | 0.02% |
2,314
-480
| -17% | -$9.79K |
|
520
PUT
Essex Property Trust
ESS
$18.8B
| $5.62M | 0.02% |
235
-46
| -16% | -$11K |
|
521
PUT
Willis Towers Watson
WTW
$27.1B
| $5.59M | 0.02% |
369
+115
| +45% | +$17.5K |
|
|
RDS.A
522
CALL
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $5.59M | 0.02% |
797
-710
| -47% | -$49.2K |
|
523
CALL
Emerson Electric
EMR
$78.2B
| $5.58M | 0.02% |
807
+363
| +82% | +$25.5K |
|
524
CALL
S&P Global
SPGI
$127B
| $5.57M | 0.02% |
273
+91
| +50% | +$18K |
|
|
AET
525
PUT
DELISTED
Aetna Inc
AET
| $5.54M | 0.02% |
302
-364
| -55% | -$64.9K |
|
Similar funds
Simplex Trading's Q2 2018 Portfolio in Review
As of Q2 2018, Simplex Trading held 8,400 positions worth $25.5B, up 1,022% from $2.27B the previous quarter. Its ten largest holdings account for 29% of the portfolio.
Simplex Trading's Q2 2018 filing shows 2,282 new, 2,314 increased, 2,591 reduced and 1,035 closed positions. Its largest new stake was Alphabet (Google) Class C: 291,860 shares worth $16.3M. The largest sale was Time Warner Inc, an estimated $34.8M.
By sector, the portfolio is most concentrated in Technology at 1.2% of assets, down from 6.2% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q2 2018 buy was Alphabet (Google) Class C: 291,860 shares worth $16.3M.
- Simplex Trading added most to Apple in Q2 2018, an estimated $34.5M increase.
- Simplex Trading's biggest Q2 2018 reduction was Amazon, cutting an estimated $31.2M.
- Simplex Trading fully exited Time Warner Inc in Q2 2018, selling an estimated $34.8M.
- Simplex Trading's ten largest holdings make up 29% of its $25.5B portfolio in Q2 2018.
- Simplex Trading opened 2,282 new positions and closed 1,035 in Q2 2018.
- Simplex Trading's portfolio value rose 1,022% quarter-over-quarter to $25.5B.
Based on Simplex Trading's 13F filing for Q2 2018, filed 30 Jul 2018.