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 |
SPDR Gold Trust
GLD
|
+$31.6M |
| 2 |
iShares Silver Trust
SLV
|
+$28.1M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.1M |
| 4 |
JPMorgan Chase
JPM
|
+$24.5M |
| 5 |
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
|
+$24M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$51.6M |
| 2 |
Amazon
AMZN
|
+$47.4M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$44.7M |
| 4 |
Netflix
NFLX
|
+$38.3M |
| 5 |
NVIDIA
NVDA
|
+$31.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.49% |
| 2 | Healthcare | 0.33% |
| 3 | Consumer Discretionary | 0.32% |
| 4 | Financials | 0.16% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3076
PUT
NNN REIT
NNN
$9.38B
| $321K | ﹤0.01% |
100
+73
| +270% | +$3.67K |
|
|
CONE
3077
PUT
DELISTED
CyrusOne Inc Common Stock
CONE
| $321K | ﹤0.01% |
52
+16
| +44% | +$977 |
|
3078
Phillips 66
PSX
$83B
| $320K | ﹤0.01% |
+5,970
| New | +$486K |
|
3079
Cabot Corp
CBT
$4.6B
| $319K | ﹤0.01% |
+12,228
| New | +$465K |
|
3080
CALL
Cogent Communications
CCOI
$595M
| $319K | ﹤0.01% |
39
-45
| -54% | -$3.4K |
|
3081
CALL
Smith & Wesson
SWBI
$660M
| $319K | ﹤0.01% |
501
+394
| +368% | +$2.79K |
|
3082
PUT
Toll Brothers
TOL
$14.1B
| $319K | ﹤0.01% |
166
-27
| -14% | -$1.02K |
|
3083
PUT
American States Water
AWR
$3.38B
| $318K | ﹤0.01% |
39
+29
| +290% | +$2.49K |
|
3084
PUT
Dover
DOV
$27.4B
| $318K | ﹤0.01% |
38
+25
| +192% | +$2.65K |
|
3085
PUT
Silicon Motion
SIMO
$8.25B
| $318K | ﹤0.01% |
87
+78
| +867% | +$3.37K |
|
3086
CALL
Vericel Corp
VCEL
$2.34B
| $318K | ﹤0.01% |
347
+20
| +6% | +$300 |
|
|
BRSL
3087
PUT
Brightstar Lottery PLC
BRSL
$1.93B
| $316K | ﹤0.01% |
532
-110
| -17% | -$1.25K |
|
3088
PUT
Levi Strauss
LEVI
$9.74B
| $316K | ﹤0.01% |
255
-13
| -5% | -$230 |
|
3089
PUT
Ingevity
NGVT
$2.56B
| $316K | ﹤0.01% |
90
+19
| +27% | +$1.11K |
|
3090
CALL
Pultegroup
PHM
$24.7B
| $316K | ﹤0.01% |
142
-510
| -78% | -$19.7K |
|
3091
CALL
EPAM Systems
EPAM
$4.91B
| $315K | ﹤0.01% |
17
-5
| -23% | -$1.08K |
|
3092
iShares MSCI Singapore ETF
EWS
$1.03B
| $315K | ﹤0.01% |
18,179
+8,635
| +90% | +$187K |
|
3093
Webster Financial
WBS
$12.4B
| $315K | ﹤0.01% |
+13,763
| New | +$560K |
|
|
ARNA
3094
CALL
DELISTED
Arena Pharmaceuticals Inc
ARNA
| $315K | ﹤0.01% |
75
+2
| +3% | +$92 |
|
3095
Booking.com
BKNG
$144B
| $314K | ﹤0.01% |
5,850
-26,925
| -82% | -$1.89M |
|
3096
PUT
Equity Residential
EQR
$25.4B
| $314K | ﹤0.01% |
51
-25
| -33% | -$1.93K |
|
3097
CALL
Murphy Oil
MUR
$5.45B
| $314K | ﹤0.01% |
513
-495
| -49% | -$9.1K |
|
3098
Prudential
PUK
$36.3B
| $314K | ﹤0.01% |
+13,104
| New | +$417K |
|
3099
PUT
Sabesp
SBS
$19.8B
| $314K | ﹤0.01% |
2,197
+748
| +52% | +$1.83K |
|
3100
PUT
Stratasys
SSYS
$695M
| $314K | ﹤0.01% |
197
+172
| +688% | +$3.13K |
|
Similar funds
Simplex Trading's Q1 2020 Portfolio in Review
As of Q1 2020, Simplex Trading held 8,783 positions worth $56.7B, up 24% from $45.7B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q1 2020 filing shows 1,512 new, 3,249 increased, 2,705 reduced and 1,159 closed positions. Its largest new stake was SPDR Gold Trust: 212,230 shares worth $31.4M. The largest sale was Alphabet (Google) Class C, an estimated $51.6M.
By sector, the portfolio is most concentrated in Technology at 0.49% of assets, down from 0.75% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2020 buy was SPDR Gold Trust: 212,230 shares worth $31.4M.
- Simplex Trading added most to JPMorgan Chase in Q1 2020, an estimated $24.5M increase.
- Simplex Trading's biggest Q1 2020 reduction was Amazon, cutting an estimated $47.4M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2020, selling an estimated $51.6M.
- Simplex Trading's ten largest holdings make up 50% of its $56.7B portfolio in Q1 2020.
- Simplex Trading opened 1,512 new positions and closed 1,159 in Q1 2020.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $56.7B.
Based on Simplex Trading's 13F filing for Q1 2020, filed 29 Apr 2020.