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 | |
|---|---|---|---|---|---|---|
|
YELL
501
DELISTED
Yellow Corporation Common Stock
YELL
| $319K | 0.04% |
17,777
-15,843
| -47% | -$294K |
|
502
Cirrus Logic
CRUS
$7.04B
| $318K | 0.04% |
9,562
-15,381
| -62% | -$446K |
|
503
Newmont
NEM
$102B
| $318K | 0.04% |
+14,693
| New | +$343K |
|
504
CALL
Nike
NKE
$62.6B
| $318K | 0.04% |
1,658
+1,036
| +167% | +$49.5K |
|
|
NUVA
505
DELISTED
NuVasive, Inc.
NUVA
| $317K | 0.04% |
+6,901
| New | +$321K |
|
|
LCI
506
DELISTED
Lannett Company, Inc.
LCI
| $316K | 0.04% |
1,169
+1,017
| +669% | +$231K |
|
507
MetLife
MET
$60B
| $315K | 0.04% |
+7,004
| New | +$315K |
|
508
PUT
ProShares Ultra S&P500
SSO
$8.02B
| $314K | 0.04% |
14,080
+13,104
| +1,343% | +$106K |
|
509
Cigna
CI
$75.4B
| $313K | 0.04% |
+2,420
| New | +$281K |
|
|
HES
510
DELISTED
Hess
HES
| $311K | 0.04% |
4,596
-7,201
| -61% | -$514K |
|
|
BGC
511
DELISTED
General Cable Corporation
BGC
| $311K | 0.04% |
18,092
+4,594
| +34% | +$65K |
|
|
POT
512
DELISTED
Potash Corp Of Saskatchewan
POT
| $311K | 0.04% |
9,662
+706
| +8% | +$24.8K |
|
513
CALL
AutoZone
AZO
$48.5B
| $310K | 0.04% |
+63
| New | +$39.6K |
|
514
CALL
AB InBev
BUD
$161B
| $310K | 0.04% |
277
+127
| +85% | +$15.3K |
|
515
Carlyle Group
CG
$15.9B
| $310K | 0.04% |
+11,446
| New | +$304K |
|
|
SHLD
516
CALL
DELISTED
Sears Holding Corporation
SHLD
| $310K | 0.04% |
324
-480
| -60% | -$17.4K |
|
|
BITA
517
PUT
DELISTED
Bitauto Holdings Limited
BITA
| $309K | 0.04% |
+178
| New | +$10.9K |
|
518
CALL
Bank of America
BAC
$432B
| $308K | 0.04% |
+2,134
| New | +$34.3K |
|
519
CALL
F5
FFIV
$22.6B
| $308K | 0.04% |
295
+149
| +102% | +$17.5K |
|
520
CALL
Walmart Inc
WMT
$870B
| $307K | 0.04% |
2,976
+363
| +14% | +$10.3K |
|
521
Zions Bancorporation
ZION
$10.3B
| $307K | 0.04% |
11,384
+9,322
| +452% | +$244K |
|
522
McCormick & Company Non-Voting
MKC
$14B
| $306K | 0.04% |
7,938
+746
| +10% | +$27.7K |
|
|
523
PUT
Intel
INTC
$516B
| $305K | 0.04% |
1,226
+194
| +19% | +$6.55K |
|
|
QEP
524
DELISTED
QEP RESOURCES, INC.
QEP
| $305K | 0.04% |
14,661
+11,317
| +338% | +$236K |
|
525
Golar LNG
GLNG
$5.06B
| $304K | 0.04% |
9,137
-14,337
| -61% | -$459K |
|
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.