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 | |
|---|---|---|---|---|---|---|
|
ETP
601
DELISTED
Energy Transfer Partners L.p.
ETP
| $257K | 0.03% |
4,623
-4,634
| -50% | -$275K |
|
602
Global X Silver Miners ETF NEW
SIL
$4.19B
| $256K | 0.03% |
10,185
+6,242
| +158% | +$179K |
|
|
CONN
603
DELISTED
Conn's Inc.
CONN
| $256K | 0.03% |
+8,483
| New | +$194K |
|
|
WIRE
604
DELISTED
Encore Wire Corp
WIRE
| $256K | 0.03% |
+6,761
| New | +$233K |
|
|
AL
605
DELISTED
Air Lease Corp
AL
| $255K | 0.03% |
+6,772
| New | +$249K |
|
606
Black Hills Corp
BKH
$5.71B
| $255K | 0.03% |
+5,069
| New | +$256K |
|
607
CALL
TripAdvisor
TRIP
$1.61B
| $255K | 0.03% |
663
+393
| +146% | +$30.9K |
|
608
PUT
FedEx
FDX
$75.9B
| $254K | 0.03% |
666
+183
| +38% | +$31.8K |
|
609
CALL
Transocean
RIG
$5.87B
| $254K | 0.03% |
+2,545
| New | +$41.3K |
|
610
Steris
STE
$20.5B
| $252K | 0.03% |
3,600
+2,495
| +226% | +$165K |
|
611
ProShares Ultra Bloomberg Crude Oil
UCO
$431M
| $252K | 0.03% |
596
+65
| +12% | +$32.1K |
|
|
QEP
612
PUT
DELISTED
QEP RESOURCES, INC.
QEP
| $252K | 0.03% |
375
+124
| +49% | +$2.59K |
|
|
JOY
613
PUT
DELISTED
Joy Global Inc
JOY
| $252K | 0.03% |
508
+354
| +230% | +$15K |
|
614
Thor Industries
THO
$4.04B
| $251K | 0.03% |
3,978
+3,679
| +1,230% | +$219K |
|
615
PUT
Vodafone
VOD
$35.7B
| $251K | 0.03% |
282
-123
| -30% | -$4.23K |
|
|
UWC
616
PUT
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $251K | 0.03% |
708
+481
| +212% | +$47.4K |
|
617
Grupo Cibest SA
CIB
$20.1B
| $249K | 0.03% |
+6,346
| New | +$273K |
|
618
PUT
Golar LNG
GLNG
$5.06B
| $249K | 0.03% |
120
-298
| -71% | -$9.55K |
|
619
Constellation Brands
STZ
$22.6B
| $249K | 0.03% |
+2,146
| New | +$241K |
|
|
WPZ
620
DELISTED
Williams Partners L.P.
WPZ
| $249K | 0.03% |
5,063
+2,512
| +98% | +$123K |
|
621
PUT
Starbucks
SBUX
$119B
| $248K | 0.03% |
1,800
+1,254
| +230% | +$56.3K |
|
|
TUP
622
DELISTED
Tupperware Brands Corporation
TUP
| $247K | 0.03% |
+3,586
| New | +$242K |
|
|
TW
623
DELISTED
TOWERS WATSON & CO COM STK CL A (DE)
TW
| $247K | 0.03% |
+1,870
| New | +$234K |
|
624
PUT
Rio Tinto
RIO
$150B
| $246K | 0.03% |
449
+42
| +10% | +$1.9K |
|
625
Sarepta Therapeutics
SRPT
$1.67B
| $246K | 0.03% |
18,578
-10,453
| -36% | -$139K |
|
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.