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 |
Tesla
TSLA
|
+$33.5M |
| 2 |
Netflix
NFLX
|
+$22.8M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$20.9M |
| 4 |
TWX
Time Warner Inc
TWX
|
+$18.3M |
| 5 |
Alibaba
BABA
|
+$15.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$71.1M |
| 2 |
Micron Technology
MU
|
+$43.8M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$26.3M |
| 4 |
Booking.com
BKNG
|
+$22.2M |
| 5 |
Boeing
BA
|
+$21.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 7.87% |
| 2 | Communication Services | 7.14% |
| 3 | Technology | 6.23% |
| 4 | Financials | 5.5% |
| 5 | Healthcare | 5.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2601
Columbia Sportswear
COLM
$3.31B
| $42K | ﹤0.01% |
+558
| New | +$42K |
|
2602
DHI Group
DHX
$171M
| $42K | ﹤0.01% |
26,381
+89
| +0.3% | +$157 |
|
2603
PUT
Hormel Foods
HRL
$14.4B
| $42K | ﹤0.01% |
195
-101
| -34% | -$3.42K |
|
2604
Liberty Broadband Class C
LBRDK
$4.55B
| $42K | ﹤0.01% |
500
+428
| +594% | +$38.5K |
|
2605
PUT
Perrigo
PRGO
$1.42B
| $42K | ﹤0.01% |
99
-216
| -69% | -$18.8K |
|
2606
CALL
Trane Technologies
TT
$103B
| $42K | ﹤0.01% |
170
+24
| +16% | +$2.15K |
|
2607
PUT
Vanguard Consumer Discretionary ETF
VCR
$5.97B
| $42K | ﹤0.01% |
330
+11
| +3% | +$1.8K |
|
2608
CALL
Vornado Realty Trust
VNO
$7.34B
| $42K | ﹤0.01% |
301
+235
| +356% | +$16.3K |
|
2609
Willis Towers Watson
WTW
$29.5B
| $42K | ﹤0.01% |
+281
| New | +$44.1K |
|
2610
PUT
Corpay
CPAY
$25.4B
| $42K | ﹤0.01% |
276
| – | – |
|
|
ECHO
2611
PUT
DELISTED
Echo Global Logistics, Inc.
ECHO
| $42K | ﹤0.01% |
254
+160
| +170% | +$4.49K |
|
|
VER
2612
DELISTED
VEREIT, Inc.
VER
| $42K | ﹤0.01% |
1,212
-4,607
| -79% | -$163K |
|
|
AYR
2613
DELISTED
Aircastle Ltd
AYR
| $42K | ﹤0.01% |
+2,162
| New | +$46.9K |
|
2614
Axcelis
ACLS
$3.51B
| $41K | ﹤0.01% |
+1,686
| New | +$44.3K |
|
2615
Apple Hospitality REIT
APLE
$3.93B
| $41K | ﹤0.01% |
+2,364
| New | +$43.3K |
|
2616
Banner Corp
BANR
$2.38B
| $41K | ﹤0.01% |
+741
| New | +$41.4K |
|
2617
B2Gold
BTG
$5.14B
| $41K | ﹤0.01% |
15,294
+9,236
| +152% | +$27.2K |
|
2618
CALL
Caleres
CAL
$434M
| $41K | ﹤0.01% |
+74
| New | +$2.27K |
|
2619
PUT
Dominion Energy
D
$63B
| $41K | ﹤0.01% |
90
+29
| +48% | +$2.14K |
|
2620
CALL
Darling Ingredients
DAR
$9.54B
| $41K | ﹤0.01% |
365
+96
| +36% | +$1.74K |
|
2621
CALL
Gen Digital
GEN
$16.4B
| $41K | ﹤0.01% |
446
-973
| -69% | -$26.5K |
|
2622
Intrepid Potash
IPI
$470M
| $41K | ﹤0.01% |
+1,137
| New | +$44K |
|
2623
Prestige Consumer Healthcare
PBH
$2.46B
| $41K | ﹤0.01% |
+1,216
| New | +$46.7K |
|
2624
PUT
Spok Holdings
SPOK
$230M
| $41K | ﹤0.01% |
316
+129
| +69% | +$1.95K |
|
2625
PUT
Telecom Argentina
TEO
$5.88B
| $41K | ﹤0.01% |
100
-129
| -56% | -$4.54K |
|
Similar funds
Simplex Trading's Q1 2018 Portfolio in Review
As of Q1 2018, Simplex Trading held 7,591 positions worth $2.27B, down 2.1% from $2.32B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading withdrew a net $210M in Q1 2018, closing 1,502 positions and reducing 2,267 holdings. Its most notable exit was Alphabet (Google) Class C, an estimated $26.3M position sold in full.
By sector, the portfolio is most concentrated in Consumer Discretionary at 7.9% of assets, down from 11% a quarter earlier, followed by Communication Services and Technology.
Against the trend, Simplex Trading opened a new position in Tesla worth $27.1M.
- Simplex Trading's largest Q1 2018 buy was Tesla: 1,525,035 shares worth $27.1M.
- Simplex Trading added most to Netflix in Q1 2018, an estimated $22.8M increase.
- Simplex Trading's biggest Q1 2018 reduction was Amazon, cutting an estimated $71.1M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2018, selling an estimated $26.3M.
- Simplex Trading's ten largest holdings make up 18% of its $2.27B portfolio in Q1 2018.
- Simplex Trading opened 1,643 new positions and closed 1,502 in Q1 2018.
- Simplex Trading's portfolio value fell 2.1% quarter-over-quarter to $2.27B.
Based on Simplex Trading's 13F filing for Q1 2018, filed 26 Apr 2018.