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 | |
|---|---|---|---|---|---|---|
726
PUT
IPG Photonics
IPGP
$3.91B
| $4.96M | 0.01% |
366
+183
| +100% | +$24.2K |
|
|
CONE
727
PUT
DELISTED
CyrusOne Inc Common Stock
CONE
| $4.95M | 0.01% |
626
+77
| +14% | +$5.14K |
|
728
PUT
Sinclair Inc
SBGI
$985M
| $4.94M | 0.01% |
1,156
-75
| -6% | -$3.63K |
|
729
CALL
Dropbox
DBX
$6.82B
| $4.91M | 0.01% |
2,436
+727
| +43% | +$15.5K |
|
730
CALL
Archer Daniels Midland
ADM
$41.5B
| $4.91M | 0.01% |
1,196
+283
| +31% | +$11.3K |
|
|
LHCG
731
CALL
DELISTED
LHC Group LLC
LHCG
| $4.91M | 0.01% |
432
+301
| +230% | +$36.3K |
|
732
PUT
CarMax
KMX
$8.31B
| $4.9M | 0.01% |
557
-455
| -45% | -$39K |
|
733
CALL
Bank of Montreal
BMO
$125B
| $4.9M | 0.01% |
664
+426
| +179% | +$31K |
|
734
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $4.89M | 0.01% |
47,190
+32,358
| +218% | +$3.42M |
|
735
CALL
Roper Technologies
ROP
$36.3B
| $4.88M | 0.01% |
137
+119
| +661% | +$43.2K |
|
736
CALL
Toll Brothers
TOL
$14B
| $4.88M | 0.01% |
1,188
+1,017
| +595% | +$37.5K |
|
737
PUT
Halliburton
HAL
$27.9B
| $4.87M | 0.01% |
2,586
-2,175
| -46% | -$45K |
|
738
CALL
Dominion Energy
D
$62.4B
| $4.84M | 0.01% |
597
-421
| -41% | -$32.6K |
|
|
I
739
PUT
DELISTED
INTELSAT S. A.
I
| $4.83M | 0.01% |
2,120
+659
| +45% | +$13.9K |
|
|
BLD
740
PUT
DELISTED
TopBuild
BLD
| $4.83M | 0.01% |
501
+350
| +232% | +$30.9K |
|
741
PUT
Cognizant
CTSH
$21.3B
| $4.82M | 0.01% |
800
-73
| -8% | -$4.61K |
|
|
PLAN
742
CALL
DELISTED
Anaplan, Inc.
PLAN
| $4.79M | 0.01% |
1,019
+792
| +349% | +$43K |
|
743
PUT
Kohl's
KSS
$2.07B
| $4.79M | 0.01% |
964
-1,150
| -54% | -$56.4K |
|
744
CALL
Teva Pharmaceuticals
TEVA
$36B
| $4.77M | 0.01% |
6,938
+2,028
| +41% | +$15.5K |
|
745
PUT
Incyte
INCY
$23.5B
| $4.76M | 0.01% |
641
+231
| +56% | +$18.7K |
|
746
PUT
Travelers Companies
TRV
$80.6B
| $4.76M | 0.01% |
320
+45
| +16% | +$6.69K |
|
747
CALL
Gen Digital
GEN
$15.6B
| $4.75M | 0.01% |
2,009
+340
| +20% | +$7.93K |
|
|
NOAH
748
PUT
Noah Holdings
NOAH
$586M
| $4.75M | 0.01% |
1,625
+1,623
| +81,150% | +$51.7K |
|
749
CALL
WisdomTree US Total Dividend Fund
DTD
$1.65B
| $4.72M | 0.01% |
3,332
+1,476
| +80% | +$71.9K |
|
750
PUT
Colgate-Palmolive
CL
$72.4B
| $4.72M | 0.01% |
642
+419
| +188% | +$30.4K |
|
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.