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 | |
|---|---|---|---|---|---|---|
|
VLP
951
DELISTED
Valero Energy Partners LP
VLP
| $128K | 0.01% |
+2,652
| New | +$129K |
|
952
PUT
Advanced Micro Devices
AMD
$880B
| $127K | 0.01% |
+1,491
| New | +$4.19K |
|
953
PUT
American Tower
AMT
$76.7B
| $127K | 0.01% |
173
+53
| +44% | +$5.15K |
|
954
CALL
Altria Group
MO
$120B
| $127K | 0.01% |
343
-36
| -9% | -$1.91K |
|
955
PUT
Nu Skin
NUS
$247M
| $127K | 0.01% |
326
-197
| -38% | -$10K |
|
956
Suburban Propane Partners
SPH
$1.22B
| $127K | 0.01% |
2,965
-766
| -21% | -$33.9K |
|
|
LOCK
957
DELISTED
LifeLock, Inc.
LOCK
| $127K | 0.01% |
9,058
+8,986
| +12,481% | +$128K |
|
|
LO
958
PUT
DELISTED
LORILLARD INC COM STK
LO
| $127K | 0.01% |
768
+474
| +161% | +$31.6K |
|
|
BBBY
959
Bed Bath & Beyond
BBBY
$471M
| $126K | 0.01% |
6,932
+719
| +12% | +$12.5K |
|
960
PUT
Diageo
DEO
$45.7B
| $126K | 0.01% |
153
+52
| +51% | +$5.99K |
|
961
iShares MSCI Spain ETF
EWP
$1.96B
| $126K | 0.01% |
3,646
+2,059
| +130% | +$69.5K |
|
|
KNDI
962
Kandi Technologies Group
KNDI
$65.9M
| $126K | 0.01% |
10,187
+10,126
| +16,600% | +$132K |
|
963
M&T Bank
MTB
$35.6B
| $126K | 0.01% |
+993
| New | +$120K |
|
964
PUT
Oneok
OKE
$58.7B
| $126K | 0.01% |
168
+83
| +98% | +$3.79K |
|
965
CALL
SM Energy
SM
$8.03B
| $126K | 0.01% |
180
-209
| -54% | -$9.07K |
|
|
AFSI
966
CALL
DELISTED
AmTrust Financial Services, Inc.
AFSI
| $126K | 0.01% |
+218
| New | +$5.9K |
|
|
FSL
967
CALL
DELISTED
FREESCALE SEMICONDUCTOR LTD
FSL
| $126K | 0.01% |
135
+129
| +2,150% | +$4.44K |
|
|
MEMP
968
DELISTED
Memorial Production Partners LP Common Units
MEMP
| $126K | 0.01% |
+7,801
| New | +$131K |
|
969
Deere & Co
DE
$165B
| $125K | 0.01% |
1,428
-10,982
| -88% | -$974K |
|
970
CALL
LyondellBasell Industries
LYB
$19.9B
| $125K | 0.01% |
+539
| New | +$45.3K |
|
|
LITS
971
Lite Strategy Inc
LITS
$33.7M
| $125K | 0.01% |
+3,512
| New | +$314K |
|
|
NSR
972
DELISTED
Neustar Inc
NSR
| $125K | 0.01% |
5,100
+4,097
| +408% | +$103K |
|
973
Autohome
ATHM
$2.45B
| $124K | 0.01% |
2,842
+614
| +28% | +$24K |
|
|
GTLS
974
DELISTED
Chart Industries
GTLS
| $124K | 0.01% |
+3,552
| New | +$114K |
|
975
PUT
Johnson & Johnson
JNJ
$624B
| $124K | 0.01% |
564
-624
| -53% | -$63.5K |
|
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.