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 |
iShares Russell 2000 ETF
IWM
|
+$58.5M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$56.5M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$44.1M |
| 4 |
Apple
AAPL
|
+$20.3M |
| 5 |
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
|
+$12.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$109M |
| 2 |
Meta Platforms (Facebook)
META
|
+$62.3M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$36.2M |
| 4 |
Goldman Sachs
GS
|
+$27.1M |
| 5 |
Boeing
BA
|
+$24.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.49% |
| 2 | Consumer Discretionary | 0.48% |
| 3 | Technology | 0.4% |
| 4 | Financials | 0.25% |
| 5 | Industrials | 0.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
276
PUT
ConocoPhillips
COP
$145B
| $13.7M | 0.04% |
2,197
-377
| -15% | -$25.7K |
|
277
PUT
Align Technology
ALGN
$12.4B
| $13.7M | 0.04% |
654
-519
| -44% | -$131K |
|
|
SHNY
278
PUT
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $13.6M | 0.04% |
6,232
+4,154
| +200% | +$9.08M |
|
279
CALL
Occidental Petroleum
OXY
$57.2B
| $13.6M | 0.04% |
2,216
+107
| +5% | +$7.52K |
|
280
CALL
Northrop Grumman
NOC
$74.6B
| $13.5M | 0.04% |
553
+207
| +60% | +$57.2K |
|
281
CALL
Vertex Pharmaceuticals
VRTX
$120B
| $13.5M | 0.04% |
817
+549
| +205% | +$95.1K |
|
282
CALL
Halliburton
HAL
$27.6B
| $13.5M | 0.04% |
5,064
+2,978
| +143% | +$100K |
|
283
PUT
United Rentals
URI
$64.8B
| $13.4M | 0.04% |
1,306
-81
| -6% | -$9.76K |
|
284
PUT
Essex Property Trust
ESS
$18.8B
| $13.3M | 0.04% |
543
+378
| +229% | +$95.3K |
|
|
PPLI
285
PUT
People Inc
PPLI
$3.23B
| $13.2M | 0.04% |
4,045
-666
| -14% | -$22.4K |
|
286
PUT
Teva Pharmaceuticals
TEVA
$35.1B
| $12.9M | 0.04% |
8,334
+3,647
| +78% | +$74.8K |
|
287
PUT
Twilio
TWLO
$27.8B
| $12.8M | 0.04% |
1,435
+436
| +44% | +$35.4K |
|
288
PUT
Capital One
COF
$124B
| $12.8M | 0.04% |
1,695
-87
| -5% | -$7.54K |
|
289
PUT
JD.com
JD
$40.7B
| $12.8M | 0.04% |
6,107
-2,798
| -31% | -$62.6K |
|
|
AMRN
290
CALL
Amarin Corp
AMRN
$287M
| $12.7M | 0.04% |
468
-170
| -27% | -$62K |
|
291
PUT
Humana
HUM
$47.7B
| $12.7M | 0.04% |
443
-119
| -21% | -$37.7K |
|
292
PUT
McKesson
MCK
$95.3B
| $12.6M | 0.04% |
1,142
+269
| +31% | +$33.5K |
|
293
PUT
Marathon Petroleum
MPC
$92.2B
| $12.5M | 0.04% |
2,118
+62
| +3% | +$4.23K |
|
294
CALL
Accenture
ACN
$85.7B
| $12.5M | 0.04% |
885
-109
| -11% | -$17.2K |
|
|
X
295
CALL
DELISTED
US Steel
X
| $12.2M | 0.04% |
6,682
+4,346
| +186% | +$109K |
|
|
TFCF
296
CALL
DELISTED
Twenty-First Century Fox, Inc. Class B
TFCF
| $12.2M | 0.04% |
2,533
-3,210
| -56% | -$151K |
|
297
CALL
iShares MSCI Global Gold Miners ETF
RING
$2.36B
| $12.2M | 0.04% |
2,767
+2,098
| +314% | +$31.9K |
|
|
AMRN
298
PUT
Amarin Corp
AMRN
$287M
| $12.1M | 0.04% |
443
+159
| +56% | +$58K |
|
299
CALL
Kraft Heinz
KHC
$30.8B
| $12M | 0.04% |
2,798
-897
| -24% | -$46.5K |
|
300
Visa
V
$672B
| $12M | 0.04% |
+91,061
| New | +$12.6M |
|
Similar funds
Simplex Trading's Q4 2018 Portfolio in Review
As of Q4 2018, Simplex Trading held 8,576 positions worth $34.1B, up 9.5% from $31.1B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q4 2018 filing shows 1,199 new, 2,701 increased, 2,877 reduced and 1,573 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M. The largest sale was Amazon, an estimated $109M.
By sector, the portfolio is most concentrated in Communication Services at 0.49% of assets, down from 0.89% a quarter earlier, followed by Consumer Discretionary and Technology.
- Simplex Trading's largest Q4 2018 buy was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q4 2018, an estimated $58.5M increase.
- Simplex Trading's biggest Q4 2018 reduction was Amazon, cutting an estimated $109M.
- Simplex Trading fully exited Meta Platforms (Facebook) in Q4 2018, selling an estimated $62.3M.
- Simplex Trading's ten largest holdings make up 43% of its $34.1B portfolio in Q4 2018.
- Simplex Trading opened 1,199 new positions and closed 1,573 in Q4 2018.
- Simplex Trading's portfolio value rose 9.5% quarter-over-quarter to $34.1B.
Based on Simplex Trading's 13F filing for Q4 2018, filed 16 Jan 2019.