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 | |
|---|---|---|---|---|---|---|
|
WBC
2326
CALL
DELISTED
WABCO HOLDINGS INC.
WBC
| $648K | ﹤0.01% |
48
+28
| +140% | +$3.77K |
|
2327
PUT
American Eagle Outfitters
AEO
$2.85B
| $647K | ﹤0.01% |
814
+511
| +169% | +$6.49K |
|
2328
CALL
Gartner
IT
$9.41B
| $647K | ﹤0.01% |
65
+40
| +160% | +$5.48K |
|
2329
CALL
Avnet
AVT
$7.33B
| $645K | ﹤0.01% |
257
+250
| +3,571% | +$8.52K |
|
2330
CALL
Bath & Body Works
BBWI
$4.01B
| $645K | ﹤0.01% |
690
-2,777
| -80% | -$44.1K |
|
2331
CALL
Encore Capital Group
ECPG
$1.93B
| $645K | ﹤0.01% |
276
+177
| +179% | +$5.96K |
|
2332
PUT
Marcus Corp
MCS
$732M
| $645K | ﹤0.01% |
524
+194
| +59% | +$4.88K |
|
|
ECHO
2333
PUT
EchoStar
ECHO
$25.5B
| $645K | ﹤0.01% |
202
+200
| +10,000% | +$7.48K |
|
2334
PUT
Eldorado Gold
EGO
$8.31B
| $643K | ﹤0.01% |
1,043
+651
| +166% | +$4.9K |
|
2335
BJ's Restaurants
BJRI
$1.41B
| $642K | ﹤0.01% |
+46,269
| New | +$1.49M |
|
2336
PUT
FIVE9
FIVN
$1.77B
| $642K | ﹤0.01% |
84
-65
| -44% | -$4.63K |
|
2337
CALL
Sturm, Ruger & Co
RGR
$610M
| $641K | ﹤0.01% |
126
+70
| +125% | +$3.44K |
|
|
RCM
2338
CALL
DELISTED
R1 RCM Inc. Common Stock
RCM
| $641K | ﹤0.01% |
706
+666
| +1,665% | +$8.01K |
|
2339
CALL
Cintas
CTAS
$82.4B
| $640K | ﹤0.01% |
148
-424
| -74% | -$27.7K |
|
2340
PUT
Globe Life
GL
$13.5B
| $640K | ﹤0.01% |
+89
| New | +$8.39K |
|
2341
PUT
Zions Bancorporation
ZION
$10.1B
| $639K | ﹤0.01% |
239
+115
| +93% | +$4.74K |
|
2342
Delek US
DK
$3.87B
| $638K | ﹤0.01% |
+40,545
| New | +$961K |
|
2343
CALL
Nutrien
NTR
$32.7B
| $638K | ﹤0.01% |
188
-126
| -40% | -$5.04K |
|
2344
CALL
Towne Bank
TOWN
$3.35B
| $638K | ﹤0.01% |
353
+320
| +970% | +$7.88K |
|
|
NEWR
2345
PUT
DELISTED
New Relic, Inc.
NEWR
| $638K | ﹤0.01% |
138
+72
| +109% | +$4.21K |
|
|
MRSH
2346
Marsh
MRSH
$86.3B
| $636K | ﹤0.01% |
7,365
+6,343
| +621% | +$676K |
|
2347
CALL
Magnachip Semiconductor
MX
$128M
| $636K | ﹤0.01% |
+576
| New | +$6.99K |
|
2348
CALL
Zimmer Biomet
ZBH
$17.7B
| $636K | ﹤0.01% |
65
-175
| -73% | -$22.9K |
|
2349
American Airlines Group
AAL
$9.58B
| $635K | ﹤0.01% |
52,152
+50,217
| +2,595% | +$1.14M |
|
|
PVG
2350
CALL
DELISTED
PRETIUM RESOURCES INC.
PVG
| $635K | ﹤0.01% |
1,121
-1,216
| -52% | -$10.4K |
|
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.