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 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
626
CALL
Microchip Technology
MCHP
$44.2B
| $5.94M | 0.02% |
1,278
+116
| +10% | +$5.26K |
|
627
PUT
National Health Investors
NHI
$3.88B
| $5.93M | 0.02% |
720
+35
| +5% | +$2.85K |
|
628
PUT
EOG Resources
EOG
$77.5B
| $5.93M | 0.02% |
799
-370
| -32% | -$30K |
|
|
ETFC
629
CALL
DELISTED
E*Trade Financial Corporation
ETFC
| $5.92M | 0.02% |
1,356
+1,069
| +372% | +$47.3K |
|
630
PUT
D.R. Horton
DHI
$39.9B
| $5.91M | 0.02% |
1,121
+257
| +30% | +$12.3K |
|
631
Kraft Heinz
KHC
$30.1B
| $5.9M | 0.02% |
211,366
+208,166
| +6,505% | +$5.99M |
|
632
PUT
Nucor
NUE
$54.9B
| $5.89M | 0.02% |
1,158
+964
| +497% | +$50.3K |
|
633
PUT
Herbalife
HLF
$1.22B
| $5.89M | 0.02% |
1,556
-1,048
| -40% | -$40.9K |
|
634
CALL
ResMed
RMD
$27.8B
| $5.89M | 0.02% |
436
+178
| +69% | +$23.3K |
|
635
PUT
Welltower
WELL
$174B
| $5.88M | 0.02% |
649
+551
| +562% | +$47.9K |
|
636
PUT
Ameriprise Financial
AMP
$46B
| $5.85M | 0.02% |
398
+309
| +347% | +$43.3K |
|
637
PUT
Oneok
OKE
$58.7B
| $5.83M | 0.02% |
791
+492
| +165% | +$34.8K |
|
638
CALL
iQIYI
IQ
$1.17B
| $5.81M | 0.02% |
3,601
-133
| -4% | -$2.44K |
|
639
PUT
W.W. Grainger
GWW
$64.6B
| $5.79M | 0.02% |
195
+61
| +46% | +$17K |
|
640
CALL
iShares Convertible Bond ETF
ICVT
$7.37B
| $5.78M | 0.02% |
1,707
+384
| +29% | +$22.9K |
|
641
CALL
Check Point Software Technologies
CHKP
$12.9B
| $5.78M | 0.02% |
528
-65
| -11% | -$7.25K |
|
|
IPFF
642
PUT
DELISTED
iShares International Preferred Stock ETF
IPFF
| $5.78M | 0.02% |
1,181
+888
| +303% | +$13.3K |
|
|
IRBT
643
PUT
DELISTED
iRobot
IRBT
| $5.78M | 0.02% |
937
+212
| +29% | +$15.2K |
|
644
CALL
Wheaton Precious Metals
WPM
$50B
| $5.76M | 0.02% |
2,194
+941
| +75% | +$25.3K |
|
645
PUT
Rockwell Automation
ROK
$51.3B
| $5.75M | 0.02% |
349
+322
| +1,193% | +$50.9K |
|
646
CALL
American Electric Power
AEP
$73.4B
| $5.72M | 0.02% |
611
-91
| -13% | -$8.26K |
|
647
CALL
Agnico Eagle Mines
AEM
$72.3B
| $5.72M | 0.02% |
1,067
-61
| -5% | -$3.46K |
|
|
FL
648
PUT
DELISTED
Foot Locker
FL
| $5.71M | 0.02% |
1,324
+405
| +44% | +$16.3K |
|
649
PUT
Teva Pharmaceuticals
TEVA
$36.3B
| $5.71M | 0.02% |
8,306
+2,873
| +53% | +$22K |
|
650
PUT
WEX
WEX
$5.94B
| $5.7M | 0.02% |
282
+175
| +164% | +$36.2K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.