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 |
Apple
AAPL
|
+$34.5M |
| 2 |
Micron Technology
MU
|
+$33.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
+$30.8M |
| 4 |
NVIDIA
NVDA
|
+$23.5M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$22.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
TWX
Time Warner Inc
TWX
|
+$34.8M |
| 2 |
Amazon
AMZN
|
+$31.2M |
| 3 |
Tesla
TSLA
|
+$17.6M |
| 4 |
Netflix
NFLX
|
+$15.5M |
| 5 |
Advanced Micro Devices
AMD
|
+$12.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 1.23% |
| 2 | Consumer Discretionary | 0.92% |
| 3 | Communication Services | 0.73% |
| 4 | Financials | 0.62% |
| 5 | Industrials | 0.6% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2526
PUT
Nasdaq
NDAQ
$51.5B
| $465K | ﹤0.01% |
153
-354
| -70% | -$10.6K |
|
|
NETI
2527
CALL
DELISTED
Eneti Inc.
NETI
| $465K | ﹤0.01% |
+70
| New | +$4.82K |
|
2528
CALL
BGC Group
BGC
$5.58B
| $464K | ﹤0.01% |
638
+596
| +1,419% | +$4.76K |
|
|
VRN
2529
DELISTED
Veren
VRN
| $464K | ﹤0.01% |
63,222
+50,271
| +388% | +$396K |
|
|
CVG
2530
PUT
DELISTED
Convergys
CVG
| $464K | ﹤0.01% |
190
+161
| +555% | +$3.84K |
|
2531
PUT
Fluor
FLR
$7.29B
| $463K | ﹤0.01% |
95
-450
| -83% | -$23.6K |
|
2532
CALL
Geron
GERN
$911M
| $463K | ﹤0.01% |
1,352
+37
| +3% | +$141 |
|
2533
PUT
Rithm Capital
RITM
$5.09B
| $463K | ﹤0.01% |
265
+19
| +8% | +$333 |
|
2534
Sempra
SRE
$60.8B
| $463K | ﹤0.01% |
+7,976
| New | +$436K |
|
|
ONCE
2535
CALL
DELISTED
Spark Therapeutics, Inc. Common Stock
ONCE
| $463K | ﹤0.01% |
56
-111
| -66% | -$8.57K |
|
2536
PUT
Alnylam Pharmaceuticals
ALNY
$36.3B
| $462K | ﹤0.01% |
47
-46
| -49% | -$4.56K |
|
2537
CALL
Green Dot
GDOT
$753M
| $462K | ﹤0.01% |
+63
| New | +$4.34K |
|
2538
CALL
Tetra Tech
TTEK
$8.23B
| $462K | ﹤0.01% |
395
-100
| -20% | -$1.07K |
|
2539
CALL
Gaming and Leisure Properties
GLPI
$12.8B
| $461K | ﹤0.01% |
129
-12
| -9% | -$416 |
|
2540
CALL
Infosys
INFY
$45B
| $461K | ﹤0.01% |
476
+432
| +982% | +$3.86K |
|
2541
CALL
SS&C Technologies
SSNC
$17.8B
| $461K | ﹤0.01% |
89
+76
| +585% | +$3.85K |
|
|
VSI
2542
PUT
DELISTED
Vitamin Shoppe Inc.
VSI
| $461K | ﹤0.01% |
664
-69
| -9% | -$376 |
|
2543
PUT
LKQ Corp
LKQ
$6.58B
| $459K | ﹤0.01% |
144
+117
| +433% | +$3.9K |
|
2544
PUT
Noodles & Co
NDLS
$90.5M
| $458K | ﹤0.01% |
47
+45
| +2,250% | +$3.18K |
|
2545
PUT
Precigen
PGEN
$1.93B
| $458K | ﹤0.01% |
329
+49
| +18% | +$828 |
|
2546
W&T Offshore
WTI
$545M
| $458K | ﹤0.01% |
64,172
+54,843
| +588% | +$355K |
|
|
SYNT
2547
DELISTED
Syntel Inc
SYNT
| $458K | ﹤0.01% |
14,277
-5,049
| -26% | -$151K |
|
2548
PUT
WEX
WEX
$6.11B
| $457K | ﹤0.01% |
+24
| New | +$4.18K |
|
|
TSG
2549
DELISTED
The Stars Group Inc.
TSG
| $455K | ﹤0.01% |
12,550
+10,223
| +439% | +$341K |
|
2550
Barclays
BCS
$94.1B
| $454K | ﹤0.01% |
+47,366
| New | +$513K |
|
Similar funds
Simplex Trading's Q2 2018 Portfolio in Review
As of Q2 2018, Simplex Trading held 8,400 positions worth $25.5B, up 1,022% from $2.27B the previous quarter. Its ten largest holdings account for 29% of the portfolio.
Simplex Trading's Q2 2018 filing shows 2,282 new, 2,314 increased, 2,591 reduced and 1,035 closed positions. Its largest new stake was Alphabet (Google) Class C: 291,860 shares worth $16.3M. The largest sale was Time Warner Inc, an estimated $34.8M.
By sector, the portfolio is most concentrated in Technology at 1.2% of assets, down from 6.2% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q2 2018 buy was Alphabet (Google) Class C: 291,860 shares worth $16.3M.
- Simplex Trading added most to Apple in Q2 2018, an estimated $34.5M increase.
- Simplex Trading's biggest Q2 2018 reduction was Amazon, cutting an estimated $31.2M.
- Simplex Trading fully exited Time Warner Inc in Q2 2018, selling an estimated $34.8M.
- Simplex Trading's ten largest holdings make up 29% of its $25.5B portfolio in Q2 2018.
- Simplex Trading opened 2,282 new positions and closed 1,035 in Q2 2018.
- Simplex Trading's portfolio value rose 1,022% quarter-over-quarter to $25.5B.
Based on Simplex Trading's 13F filing for Q2 2018, filed 30 Jul 2018.