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 |
NVIDIA
NVDA
|
+$29.6M |
| 2 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$22.6M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$17.9M |
| 4 |
Netflix
NFLX
|
+$17.1M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$13.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 2 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$40.6M |
| 3 |
Walt Disney
DIS
|
+$25.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.5M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.5% |
| 2 | Communication Services | 0.5% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.3% |
| 5 | Consumer Discretionary | 0.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
851
CALL
Clorox
CLX
$11.6B
| $3.8M | 0.01% |
248
+37
| +18% | +$5.65K |
|
852
PUT
Ford
F
$57.3B
| $3.77M | 0.01% |
3,688
+2,072
| +128% | +$20.4K |
|
853
PUT
Regions Financial
RF
$26.3B
| $3.76M | 0.01% |
2,518
+59
| +2% | +$871 |
|
854
Alibaba
BABA
$269B
| $3.75M | 0.01% |
+22,131
| New | +$3.82M |
|
855
CALL
Synchrony
SYF
$23.7B
| $3.74M | 0.01% |
1,080
-1,079
| -50% | -$36.6K |
|
856
Align Technology
ALGN
$12B
| $3.74M | 0.01% |
+13,679
| New | +$4.13M |
|
857
PUT
PTC
PTC
$13.7B
| $3.74M | 0.01% |
417
+87
| +26% | +$7.8K |
|
858
CALL
Southern Company
SO
$110B
| $3.74M | 0.01% |
676
-215
| -24% | -$11.5K |
|
859
PUT
Green Dot
GDOT
$753M
| $3.73M | 0.01% |
764
+685
| +867% | +$37.3K |
|
860
Western Digital
WDC
$179B
| $3.73M | 0.01% |
103,751
+57,487
| +124% | +$1.97M |
|
861
PUT
D.R. Horton
DHI
$41.2B
| $3.73M | 0.01% |
864
-1,044
| -55% | -$46.2K |
|
862
CALL
Archer Daniels Midland
ADM
$41.4B
| $3.73M | 0.01% |
913
-904
| -50% | -$37.4K |
|
863
CALL
Under Armour Class C
UA
$2.92B
| $3.72M | 0.01% |
1,535
-183
| -11% | -$3.81K |
|
864
ConocoPhillips
COP
$147B
| $3.72M | 0.01% |
61,007
-32,697
| -35% | -$2.03M |
|
|
IRBT
865
CALL
DELISTED
iRobot
IRBT
| $3.72M | 0.01% |
406
-51
| -11% | -$5.17K |
|
866
PUT
Fox Class B
FOX
$20.7B
| $3.72M | 0.01% |
+1,015
| New | +$36.8K |
|
867
PUT
Snap-on
SNA
$20.9B
| $3.71M | 0.01% |
224
+91
| +68% | +$14.8K |
|
|
GBT
868
PUT
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $3.71M | 0.01% |
705
+460
| +188% | +$26.4K |
|
869
CALL
Campbell Soup
CPB
$6.51B
| $3.71M | 0.01% |
925
-827
| -47% | -$32.5K |
|
870
PUT
Southwest Airlines
LUV
$22B
| $3.69M | 0.01% |
727
-727
| -50% | -$37.7K |
|
871
PUT
YPF
YPF
$20.2B
| $3.68M | 0.01% |
2,023
+728
| +56% | +$11.2K |
|
872
PUT
Howard Hughes
HHH
$3.93B
| $3.68M | 0.01% |
312
+300
| +2,500% | +$30.7K |
|
873
PUT
Bread Financial
BFH
$4.21B
| $3.67M | 0.01% |
328
-201
| -38% | -$24.3K |
|
874
Lumen
LUMN
$6.53B
| $3.66M | 0.01% |
311,190
-177,447
| -36% | -$2M |
|
875
CALL
Williams Companies
WMB
$90.5B
| $3.66M | 0.01% |
1,305
+47
| +4% | +$1.31K |
|
Similar funds
Simplex Trading's Q2 2019 Portfolio in Review
As of Q2 2019, Simplex Trading held 8,406 positions worth $36.6B, up 1.9% from $36B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q2 2019 filing shows 1,261 new, 2,604 increased, 3,015 reduced and 1,301 closed positions. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M. The largest sale was Invesco QQQ Trust, an estimated $123M.
By sector, the portfolio is most concentrated in Technology at 0.5% of assets, up from 0.42% a quarter earlier, followed by Communication Services and Healthcare.
- Simplex Trading's largest Q2 2019 buy was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M.
- Simplex Trading added most to NVIDIA in Q2 2019, an estimated $29.6M increase.
- Simplex Trading's biggest Q2 2019 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $40.6M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2019, selling an estimated $123M.
- Simplex Trading's ten largest holdings make up 35% of its $36.6B portfolio in Q2 2019.
- Simplex Trading opened 1,261 new positions and closed 1,301 in Q2 2019.
- Simplex Trading's portfolio value rose 1.9% quarter-over-quarter to $36.6B.
Based on Simplex Trading's 13F filing for Q2 2019, filed 26 Jul 2019.