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 | |
|---|---|---|---|---|---|---|
2626
CALL
Armstrong World Industries
AWI
$6.86B
| $484K | ﹤0.01% |
61
+31
| +103% | +$2.99K |
|
2627
PUT
Icahn Enterprises
IEP
$5.17B
| $484K | ﹤0.01% |
100
+38
| +61% | +$2.3K |
|
|
CS
2628
DELISTED
Credit Suisse Group
CS
| $484K | ﹤0.01% |
59,852
-17,146
| -22% | -$199K |
|
2629
CALL
Regenxbio
RGNX
$623M
| $482K | ﹤0.01% |
149
-186
| -56% | -$7.75K |
|
|
X
2630
DELISTED
US Steel
X
| $482K | ﹤0.01% |
+76,394
| New | +$640K |
|
|
CONN
2631
PUT
DELISTED
Conn's Inc.
CONN
| $482K | ﹤0.01% |
1,154
+972
| +534% | +$7.93K |
|
2632
CALL
TransDigm Group
TDG
$69.2B
| $480K | ﹤0.01% |
15
-191
| -93% | -$104K |
|
2633
PUT
Cirrus Logic
CRUS
$6.74B
| $479K | ﹤0.01% |
73
-88
| -55% | -$6.5K |
|
2634
HF Sinclair
DINO
$15.9B
| $479K | ﹤0.01% |
+19,577
| New | +$731K |
|
|
EXAS
2635
DELISTED
Exact Sciences
EXAS
| $478K | ﹤0.01% |
8,253
-16,902
| -67% | -$1.37M |
|
2636
PUT
Meritage Homes
MTH
$4.87B
| $478K | ﹤0.01% |
262
+250
| +2,083% | +$7.58K |
|
2637
Direxion Daily FTSE China Bull 3X ETF
YINN
$660M
| $478K | ﹤0.01% |
+2,062
| New | +$721K |
|
2638
Marcus Corp
MCS
$732M
| $477K | ﹤0.01% |
38,754
+18,436
| +91% | +$464K |
|
|
CTLT
2639
PUT
DELISTED
CATALENT, INC.
CTLT
| $477K | ﹤0.01% |
92
-70
| -43% | -$3.82K |
|
2640
PUT
DXC Technology
DXC
$1.63B
| $476K | ﹤0.01% |
365
-320
| -47% | -$8.46K |
|
|
AYR
2641
CALL
DELISTED
Aircastle Ltd
AYR
| $476K | ﹤0.01% |
149
+146
| +4,867% | +$4.63K |
|
2642
CALL
LKQ Corp
LKQ
$6.58B
| $475K | ﹤0.01% |
232
-895
| -79% | -$26.5K |
|
2643
Sociedad Química y Minera de Chile
SQM
$19.6B
| $475K | ﹤0.01% |
21,075
+12,166
| +137% | +$328K |
|
2644
PUT
America Movil
AMX
$78.1B
| $474K | ﹤0.01% |
403
+386
| +2,271% | +$6.03K |
|
2645
CALL
Globant
GLOB
$1.35B
| $474K | ﹤0.01% |
54
+15
| +38% | +$1.68K |
|
2646
CALL
United Therapeutics
UTHR
$26.3B
| $474K | ﹤0.01% |
50
-52
| -51% | -$4.94K |
|
|
RADA
2647
DELISTED
Rada Electronic Industries Ltd
RADA
| $474K | ﹤0.01% |
135,594
+126,691
| +1,423% | +$655K |
|
|
AMWD
2648
CALL
DELISTED
American Woodmark
AMWD
| $473K | ﹤0.01% |
104
+61
| +142% | +$5.64K |
|
2649
PUT
LivePerson
LPSN
$18.9M
| $473K | ﹤0.01% |
14
+6
| +75% | +$2.91K |
|
2650
Mid-America Apartment Communities
MAA
$15.6B
| $473K | ﹤0.01% |
4,597
+3,856
| +520% | +$501K |
|
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.