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 | |
|---|---|---|---|---|---|---|
3301
PUT
Azenta
AZTA
$1.27B
| $256K | ﹤0.01% |
84
+59
| +236% | +$2.15K |
|
3302
Kohl's
KSS
$2.1B
| $256K | ﹤0.01% |
17,597
-22,987
| -57% | -$862K |
|
3303
PUT
Medpace
MEDP
$16.7B
| $256K | ﹤0.01% |
35
+21
| +150% | +$1.82K |
|
3304
CALL
Urban Outfitters
URBN
$6.23B
| $256K | ﹤0.01% |
180
-606
| -77% | -$14.1K |
|
|
WIFI
3305
PUT
DELISTED
Boingo Wireless, Inc.
WIFI
| $256K | ﹤0.01% |
242
+58
| +32% | +$673 |
|
3306
PUT
Akebia Therapeutics
AKBA
$341M
| $255K | ﹤0.01% |
337
+1
| +0.3% | +$8 |
|
3307
PUT
Amphenol
APH
$182B
| $255K | ﹤0.01% |
140
+48
| +52% | +$1.14K |
|
3308
PUT
Coeur Mining
CDE
$15.6B
| $255K | ﹤0.01% |
795
+457
| +135% | +$2.38K |
|
3309
Leggett & Platt
LEG
$1.51B
| $255K | ﹤0.01% |
+9,588
| New | +$399K |
|
3310
PUT
VirnetX Holding Corp
VHC
$49.7M
| $255K | ﹤0.01% |
23
+12
| +109% | +$1.14K |
|
3311
CALL
Builders FirstSource
BLDR
$7.83B
| $254K | ﹤0.01% |
208
-50
| -19% | -$1.13K |
|
3312
CALL
Pediatrix Medical
MD
$2.16B
| $254K | ﹤0.01% |
219
+217
| +10,850% | +$4.47K |
|
|
SCS
3313
PUT
DELISTED
Steelcase
SCS
| $254K | ﹤0.01% |
258
-149
| -37% | -$2.46K |
|
3314
PUT
Xylem
XYL
$28.6B
| $254K | ﹤0.01% |
39
+22
| +129% | +$1.73K |
|
|
TVRD
3315
CALL
Tvardi Therapeutics
TVRD
$23.7M
| $254K | ﹤0.01% |
5
-2
| -29% | -$1.09K |
|
|
LM
3316
CALL
DELISTED
Legg Mason, Inc.
LM
| $254K | ﹤0.01% |
52
-6
| -10% | -$262 |
|
|
ARR
3317
Armour Residential REIT
ARR
$2.02B
| $253K | ﹤0.01% |
+5,763
| New | +$493K |
|
3318
CALL
Bloomin' Brands
BLMN
$730M
| $253K | ﹤0.01% |
355
+261
| +278% | +$4.54K |
|
3319
Nordic American Tanker
NAT
$1.36B
| $253K | ﹤0.01% |
55,858
+29,550
| +112% | +$107K |
|
3320
CALL
Solid Biosciences
SLDB
$786M
| $253K | ﹤0.01% |
71
-9
| -11% | -$445 |
|
|
SDC
3321
DELISTED
SmileDirectClub, Inc. Class A Common Stock
SDC
| $253K | ﹤0.01% |
+54,387
| New | +$536K |
|
3322
CALL
Group 1 Automotive
GPI
$4B
| $252K | ﹤0.01% |
57
+53
| +1,325% | +$4.47K |
|
3323
CALL
Impinj
PI
$3.87B
| $252K | ﹤0.01% |
151
-83
| -35% | -$2.24K |
|
3324
PUT
Children's Place
PLCE
$52.9M
| $252K | ﹤0.01% |
129
-107
| -45% | -$5.67K |
|
3325
Simulations Plus
SLP
$371M
| $252K | ﹤0.01% |
+7,229
| New | +$241K |
|
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.