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 |
Alphabet (Google) Class C
GOOG
|
+$40.1M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
+$12.5M |
| 3 |
Alibaba
BABA
|
+$10.5M |
| 4 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$9.89M |
| 5 |
Intel
INTC
|
+$9.83M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$35.7M |
| 2 |
Gilead Sciences
GILD
|
+$32.3M |
| 3 |
Amazon
AMZN
|
+$29M |
| 4 |
Booking.com
BKNG
|
+$28.4M |
| 5 |
Baidu
BIDU
|
+$13.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 7.76% |
| 2 | Consumer Discretionary | 7.62% |
| 3 | Healthcare | 7.24% |
| 4 | Technology | 6.95% |
| 5 | Financials | 4.83% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2676
PUT
ASML
ASML
$675B
| $13K | ﹤0.01% |
68
-87
| -56% | -$9.14K |
|
2677
CALL
Bunge Global
BG
$23.6B
| $13K | ﹤0.01% |
143
-52
| -27% | -$4.44K |
|
2678
PUT
Canadian National Railway
CNI
$78.3B
| $13K | ﹤0.01% |
51
+22
| +76% | +$1.5K |
|
2679
CALL
Corcept Therapeutics
CORT
$10.2B
| $13K | ﹤0.01% |
+48
| New | +$174 |
|
2680
PUT
Campbell Soup
CPB
$6.51B
| $13K | ﹤0.01% |
99
+85
| +607% | +$3.92K |
|
2681
PUT
Edison International
EIX
$30.7B
| $13K | ﹤0.01% |
10
+2
| +25% | +$130 |
|
2682
Equinor
EQNR
$95.9B
| $13K | ﹤0.01% |
+747
| New | +$13.3K |
|
2683
CALL
Entergy
ETR
$54.1B
| $13K | ﹤0.01% |
184
+36
| +24% | +$1.48K |
|
2684
CALL
Exelixis
EXEL
$13.9B
| $13K | ﹤0.01% |
+208
| New | +$483 |
|
2685
CALL
Eagle Materials
EXP
$6.6B
| $13K | ﹤0.01% |
11
-30
| -73% | -$2.34K |
|
2686
Frontline
FRO
$8.75B
| $13K | ﹤0.01% |
+1,221
| New | +$17K |
|
2687
Green Dot
GDOT
$753M
| $13K | ﹤0.01% |
858
-4,800
| -85% | -$82.1K |
|
2688
Geron
GERN
$911M
| $13K | ﹤0.01% |
3,519
-3,481
| -50% | -$11.8K |
|
2689
CALL
Golar LNG
GLNG
$4.95B
| $13K | ﹤0.01% |
196
-297
| -60% | -$9.52K |
|
2690
PUT
Hasbro
HAS
$12.6B
| $13K | ﹤0.01% |
120
+1
| +0.8% | +$59 |
|
2691
PUT
Humana
HUM
$46.7B
| $13K | ﹤0.01% |
61
-41
| -40% | -$6.49K |
|
2692
CALL
Huntsman Corp
HUN
$2.24B
| $13K | ﹤0.01% |
228
+32
| +16% | +$714 |
|
2693
CALL
Interactive Brokers
IBKR
$40.9B
| $13K | ﹤0.01% |
124
-72
| -37% | -$572 |
|
2694
Immersion
IMMR
$216M
| $13K | ﹤0.01% |
1,447
+801
| +124% | +$7.07K |
|
2695
LivePerson
LPSN
$18.9M
| $13K | ﹤0.01% |
+85
| New | +$14.4K |
|
2696
Live Nation Entertainment
LYV
$41.2B
| $13K | ﹤0.01% |
+543
| New | +$13.7K |
|
2697
PUT
Madison Square Garden
MSGS
$9.54B
| $13K | ﹤0.01% |
+184
| New | +$10.1K |
|
2698
OneSpan
OSPN
$562M
| $13K | ﹤0.01% |
640
-2,000
| -76% | -$47.4K |
|
2699
CALL
Paychex
PAYX
$40.4B
| $13K | ﹤0.01% |
134
+78
| +139% | +$3.79K |
|
2700
CALL
PBF Energy
PBF
$7.29B
| $13K | ﹤0.01% |
+32
| New | +$928 |
|
Similar funds
Simplex Trading's Q1 2015 Portfolio in Review
As of Q1 2015, Simplex Trading held 6,670 positions worth $860M, up 4.2% from $826M the previous quarter. Its ten largest holdings account for 15% of the portfolio.
Simplex Trading's Q1 2015 filing shows 1,973 new, 1,386 increased, 1,513 reduced and 1,643 closed positions. Its largest new stake was Alphabet (Google) Class C: 1,497,580 shares worth $41.4M. The largest sale was Apple, an estimated $35.7M.
By sector, the portfolio is most concentrated in Communication Services at 7.8% of assets, up from 4.8% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q1 2015 buy was Alphabet (Google) Class C: 1,497,580 shares worth $41.4M.
- Simplex Trading added most to Alibaba in Q1 2015, an estimated $10.5M increase.
- Simplex Trading's biggest Q1 2015 reduction was Apple, cutting an estimated $35.7M.
- Simplex Trading fully exited Amazon in Q1 2015, selling an estimated $29M.
- Simplex Trading's ten largest holdings make up 15% of its $860M portfolio in Q1 2015.
- Simplex Trading opened 1,973 new positions and closed 1,643 in Q1 2015.
- Simplex Trading's portfolio value rose 4.2% quarter-over-quarter to $860M.
Based on Simplex Trading's 13F filing for Q1 2015, filed 21 Apr 2015.