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 | |
|---|---|---|---|---|---|---|
3701
Direxion Daily MSCI India Bull 2X ETF
INDL
$56M
| $175K | ﹤0.01% |
2,861
+265
| +10% | +$16.1K |
|
3702
CALL
Riot Platforms
RIOT
$8.03B
| $175K | ﹤0.01% |
987
-43
| -4% | -$90 |
|
3703
CALL
Viavi Solutions
VIAV
$8.66B
| $175K | ﹤0.01% |
125
+106
| +558% | +$1.51K |
|
3704
PUT
Adtran
ADTN
$730M
| $174K | ﹤0.01% |
154
+103
| +202% | +$1.22K |
|
3705
CALL
Alliance Resource Partners
ARLP
$3.33B
| $174K | ﹤0.01% |
109
-103
| -49% | -$1.68K |
|
3706
PUT
DHT Holdings
DHT
$2.99B
| $174K | ﹤0.01% |
284
-1
| -0.4% | -$6 |
|
|
STML
3707
PUT
DELISTED
Stemline Therapeutics, Inc.
STML
| $174K | ﹤0.01% |
168
+23
| +16% | +$301 |
|
3708
CALL
Ameris Bancorp
ABCB
$5.9B
| $173K | ﹤0.01% |
43
-14
| -25% | -$528 |
|
3709
CALL
Aegon
AEG
$13.6B
| $173K | ﹤0.01% |
455
+160
| +54% | +$637 |
|
3710
3D Systems Corp
DDD
$412M
| $173K | ﹤0.01% |
21,235
-19,721
| -48% | -$159K |
|
3711
Direxion Daily Real Estate Bull 3X ETF
DRN
$48.6M
| $173K | ﹤0.01% |
5,774
-2,085
| -27% | -$57.9K |
|
3712
CALL
Equity Lifestyle Properties
ELS
$12.8B
| $173K | ﹤0.01% |
26
-778
| -97% | -$50.7K |
|
3713
CALL
Lexicon Pharmaceuticals
LXRX
$1.04B
| $173K | ﹤0.01% |
576
+573
| +19,100% | +$1.77K |
|
3714
Marcus Corp
MCS
$766M
| $173K | ﹤0.01% |
+4,698
| New | +$162K |
|
3715
PUT
Navigator Holdings
NVGS
$1.34B
| $173K | ﹤0.01% |
162
-23
| -12% | -$229 |
|
|
EMWP
3716
PUT
DELISTED
Eros Media World PLC
EMWP
| $173K | ﹤0.01% |
46
-49
| -52% | -$1.74K |
|
3717
Alkermes
ALKS
$8.47B
| $172K | ﹤0.01% |
8,852
+4,416
| +100% | +$96.1K |
|
3718
PUT
AMC Global Media
AMCX
$451M
| $172K | ﹤0.01% |
35
-236
| -87% | -$12.2K |
|
3719
PUT
Sally Beauty Holdings
SBH
$1.48B
| $172K | ﹤0.01% |
116
+54
| +87% | +$706 |
|
3720
World Acceptance Corp
WRLD
$880M
| $172K | ﹤0.01% |
1,354
+1,266
| +1,439% | +$179K |
|
3721
PUT
DMC Global
BOOM
$112M
| $171K | ﹤0.01% |
39
-360
| -90% | -$18.1K |
|
|
EB
3722
PUT
DELISTED
Eventbrite
EB
| $171K | ﹤0.01% |
97
-7
| -7% | -$123 |
|
3723
PUT
EnerSys
ENS
$6.69B
| $171K | ﹤0.01% |
26
-5
| -16% | -$314 |
|
3724
Forestar Group
FOR
$1.5B
| $171K | ﹤0.01% |
+9,390
| New | +$184K |
|
3725
CALL
Malibu Boats
MBUU
$559M
| $171K | ﹤0.01% |
56
+6
| +12% | +$185 |
|
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.