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 | |
|---|---|---|---|---|---|---|
3451
Harley-Davidson
HOG
$2.61B
| $227K | ﹤0.01% |
12,027
-12,149
| -50% | -$368K |
|
3452
Host Hotels & Resorts
HST
$17.1B
| $227K | ﹤0.01% |
20,614
+18,736
| +998% | +$283K |
|
3453
CALL
Lincoln Electric
LECO
$14.1B
| $227K | ﹤0.01% |
33
+32
| +3,200% | +$2.74K |
|
3454
PUT
Dorman Products
DORM
$4.08B
| $226K | ﹤0.01% |
41
+26
| +173% | +$1.77K |
|
3455
PUT
Tenet Healthcare
THC
$21B
| $226K | ﹤0.01% |
157
-396
| -72% | -$11.4K |
|
3456
PUT
Western Midstream Partners
WES
$19.3B
| $226K | ﹤0.01% |
+698
| New | +$9.61K |
|
3457
PUT
Camtek
CAMT
$7.07B
| $225K | ﹤0.01% |
268
-400
| -60% | -$4.27K |
|
3458
PUT
Entergy
ETR
$53.1B
| $225K | ﹤0.01% |
48
-100
| -68% | -$5.93K |
|
3459
CALL
Olin
OLN
$2.49B
| $225K | ﹤0.01% |
193
-99
| -34% | -$1.5K |
|
|
EMKR
3460
PUT
DELISTED
Emcore Corp
EMKR
| $225K | ﹤0.01% |
+101
| New | +$2.98K |
|
3461
CALL
Manhattan Associates
MANH
$9.42B
| $224K | ﹤0.01% |
45
-115
| -72% | -$8.29K |
|
|
HTT
3462
CALL
High Templar Tech Ltd
HTT
$376M
| $224K | ﹤0.01% |
1,249
-628
| -33% | -$1.76K |
|
3463
CALL
10x Genomics
TXG
$5.83B
| $224K | ﹤0.01% |
36
+19
| +112% | +$1.48K |
|
3464
CALL
Lands' End
LE
$375M
| $223K | ﹤0.01% |
419
-232
| -36% | -$2.48K |
|
3465
Takeda Pharmaceutical
TAK
$55.7B
| $223K | ﹤0.01% |
+14,748
| New | +$267K |
|
3466
PUT
Alaunos Therapeutics
TCRT
$4.71M
| $223K | ﹤0.01% |
6
-6
| -50% | -$3.1K |
|
3467
PUT
Trinity Industries
TRN
$2.95B
| $223K | ﹤0.01% |
140
+98
| +233% | +$1.96K |
|
3468
iShares MSCI USA Value Factor ETF
VLUE
$9.38B
| $223K | ﹤0.01% |
3,545
+3,388
| +2,158% | +$274K |
|
|
BECN
3469
CALL
DELISTED
Beacon Roofing Supply, Inc.
BECN
| $223K | ﹤0.01% |
135
+48
| +55% | +$1.4K |
|
|
MAXR
3470
PUT
DELISTED
Maxar Technologies Inc. Common Stock
MAXR
| $223K | ﹤0.01% |
209
-67
| -24% | -$1.05K |
|
3471
PUT
Arbor Realty Trust
ABR
$977M
| $222K | ﹤0.01% |
454
+319
| +236% | +$3.9K |
|
|
HIMX
3472
CALL
Himax Technologies
HIMX
$2.22B
| $222K | ﹤0.01% |
812
+561
| +224% | +$2.11K |
|
3473
CALL
MasTec
MTZ
$26.6B
| $222K | ﹤0.01% |
68
-46
| -40% | -$2.34K |
|
3474
CALL
Core Laboratories
CLB
$518M
| $221K | ﹤0.01% |
214
-44
| -17% | -$1.23K |
|
3475
CALL
Stratasys
SSYS
$700M
| $221K | ﹤0.01% |
139
+94
| +209% | +$1.71K |
|
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.