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
|
+$54.6M |
| 2 |
Apple
AAPL
|
+$29.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$15.7M |
| 4 |
IBM
IBM
|
+$13.8M |
| 5 |
Baidu
BIDU
|
+$10.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$10.1M |
| 2 |
McDonald's
MCD
|
+$8.46M |
| 3 |
Ralph Lauren
RL
|
+$5.36M |
| 4 |
Intel
INTC
|
+$5.04M |
| 5 |
WBA
Walgreens Boots Alliance
WBA
|
+$4.76M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 14.27% |
| 2 | Technology | 10.3% |
| 3 | Healthcare | 7.76% |
| 4 | Consumer Discretionary | 6.32% |
| 5 | Financials | 5.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1051
CALL
WisdomTree US Total Dividend Fund
DTD
$1.64B
| $130K | 0.01% |
810
-1,446
| -64% | -$54.2K |
|
1052
Hain Celestial
HAIN
$49.1M
| $130K | 0.01% |
1,989
+1,173
| +144% | +$74.1K |
|
1053
CALL
Kroger
KR
$34.2B
| $129K | 0.01% |
624
-1,036
| -62% | -$37.7K |
|
1054
CALL
Lowe's Companies
LOW
$113B
| $129K | 0.01% |
274
+83
| +43% | +$5.92K |
|
1055
iShares S&P 100 ETF
OEF
$19.8B
| $129K | 0.01% |
1,426
+1,300
| +1,032% | +$120K |
|
1056
PUT
World Acceptance Corp
WRLD
$840M
| $129K | 0.01% |
166
+144
| +655% | +$11.5K |
|
1057
CALL
Zoetis
ZTS
$31.3B
| $129K | 0.01% |
339
-626
| -65% | -$29.9K |
|
|
TSL
1058
DELISTED
Trina Solar Limited
TSL
| $129K | 0.01% |
11,096
-3,817
| -26% | -$47.2K |
|
1059
Credicorp
BAP
$30.8B
| $128K | 0.01% |
926
+299
| +48% | +$43.7K |
|
1060
Cadence Design Systems
CDNS
$91.1B
| $128K | 0.01% |
+6,526
| New | +$127K |
|
1061
PUT
Melco Resorts & Entertainment
MLCO
$2.16B
| $128K | 0.01% |
143
-249
| -64% | -$5.13K |
|
1062
PUT
TripAdvisor
TRIP
$1.57B
| $128K | 0.01% |
339
+45
| +15% | +$3.66K |
|
|
OKS
1063
DELISTED
Oneok Partners LP
OKS
| $128K | 0.01% |
3,791
+1,160
| +44% | +$45.9K |
|
1064
Kohl's
KSS
$2.06B
| $127K | 0.01% |
2,042
-11,516
| -85% | -$800K |
|
1065
Plains GP Holdings
PAGP
$5.25B
| $127K | 0.01% |
1,860
+1,846
| +13,186% | +$139K |
|
1066
Pitney Bowes
PBI
$2.42B
| $127K | 0.01% |
6,125
+4,579
| +296% | +$103K |
|
1067
State Street
STT
$50.6B
| $127K | 0.01% |
+1,651
| New | +$129K |
|
|
ARRS
1068
DELISTED
ARRIS International plc Ordinary Shares
ARRS
| $127K | 0.01% |
+4,151
| New | +$134K |
|
1069
PUT
Best Buy
BBY
$17.8B
| $126K | 0.01% |
268
-199
| -43% | -$7.05K |
|
1070
Popular Inc
BPOP
$11B
| $126K | 0.01% |
4,398
+3,195
| +266% | +$107K |
|
1071
Five Below
FIVE
$11.1B
| $126K | 0.01% |
3,190
-8,372
| -72% | -$304K |
|
1072
CALL
McKesson
MCK
$96.5B
| $126K | 0.01% |
203
+140
| +222% | +$32.4K |
|
1073
ProShares Ultra Real Estate
URE
$57.7M
| $126K | 0.01% |
2,720
+2,482
| +1,043% | +$129K |
|
|
QEP
1074
DELISTED
QEP RESOURCES, INC.
QEP
| $126K | 0.01% |
6,845
-7,816
| -53% | -$160K |
|
|
IOC
1075
CALL
DELISTED
Interoil Corporation
IOC
| $126K | 0.01% |
178
+109
| +158% | +$5.55K |
|
Similar funds
Simplex Trading's Q2 2015 Portfolio in Review
As of Q2 2015, Simplex Trading held 6,639 positions worth $1.19B, up 39% from $860M the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $279M of net new capital in Q2 2015, opening 1,607 new positions and adding to 1,829 existing holdings. Its largest new stake was IBM: 85,948 shares worth $13.4M.
By sector, the portfolio is most concentrated in Communication Services at 14% of assets, up from 7.8% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Intel, an estimated $5.04M trimmed.
- Simplex Trading's largest Q2 2015 buy was IBM: 85,948 shares worth $13.4M.
- Simplex Trading added most to Alphabet (Google) Class C in Q2 2015, an estimated $54.6M increase.
- Simplex Trading's biggest Q2 2015 reduction was Intel, cutting an estimated $5.04M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q2 2015, selling an estimated $10.1M.
- Simplex Trading's ten largest holdings make up 20% of its $1.19B portfolio in Q2 2015.
- Simplex Trading opened 1,607 new positions and closed 1,438 in Q2 2015.
- Simplex Trading's portfolio value rose 39% quarter-over-quarter to $1.19B.
Based on Simplex Trading's 13F filing for Q2 2015, filed 8 Jul 2015.