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 | |
|---|---|---|---|---|---|---|
|
JUNO
826
CALL
DELISTED
Juno Therapeutics, Inc.
JUNO
| $188K | 0.02% |
382
+265
| +226% | +$14.1K |
|
|
K
827
DELISTED
Kellanova
K
| $187K | 0.02% |
3,181
+2,671
| +524% | +$160K |
|
828
PUT
Microsoft
MSFT
$2.83T
| $187K | 0.02% |
920
-177
| -16% | -$8.08K |
|
829
CALL
Royal Caribbean
RCL
$76B
| $187K | 0.02% |
149
-8
| -5% | -$610 |
|
830
Edwards Lifesciences
EW
$48.3B
| $186K | 0.02% |
7,866
-14,874
| -65% | -$336K |
|
831
Huntsman Corp
HUN
$2.25B
| $186K | 0.02% |
+8,473
| New | +$192K |
|
832
CALL
Ionis Pharmaceuticals
IONS
$9.23B
| $186K | 0.02% |
559
+162
| +41% | +$10.3K |
|
833
Stryker
SYK
$122B
| $186K | 0.02% |
1,954
-691
| -26% | -$65.5K |
|
|
AXLL
834
DELISTED
AXIALL CORP COM STK (DE)
AXLL
| $186K | 0.02% |
+5,169
| New | +$206K |
|
|
NKY
835
DELISTED
PRECIDIAN INVESTMENTS MAXIS NIKKEI 225 INDEX
NKY
| $186K | 0.02% |
+9,561
| New | +$188K |
|
|
CHIX
836
DELISTED
Global X MSCI China Financials ETF
CHIX
| $186K | 0.02% |
10,370
+7,378
| +247% | +$138K |
|
837
PUT
Palo Alto Networks
PANW
$265B
| $185K | 0.02% |
3,372
+744
| +28% | +$19.9K |
|
838
Wolverine World Wide
WWW
$1.51B
| $185K | 0.02% |
+6,526
| New | +$200K |
|
839
ProShares UltraShort NASDAQ Biotechnology
BIS
$2.27M
| $184K | 0.02% |
804
+477
| +146% | +$118K |
|
840
Silicon Laboratories
SLAB
$7.15B
| $184K | 0.02% |
3,424
+2,943
| +612% | +$157K |
|
841
CALL
Equinix
EQIX
$102B
| $183K | 0.02% |
46
-66
| -59% | -$16.8K |
|
842
CALL
Incyte
INCY
$23.3B
| $183K | 0.02% |
97
+7
| +8% | +$725 |
|
843
PUT
Occidental Petroleum
OXY
$57.3B
| $183K | 0.02% |
522
+130
| +33% | +$10.2K |
|
|
ETP
844
DELISTED
Energy Transfer Partners, L.P.
ETP
| $183K | 0.02% |
4,823
+3,521
| +270% | +$144K |
|
845
Global Payments
GPN
$21.3B
| $182K | 0.02% |
3,524
+3,364
| +2,103% | +$173K |
|
846
PUT
iShares Morningstar Value ETF
ILCV
$1.29B
| $182K | 0.02% |
1,778
+502
| +39% | +$21.6K |
|
847
CALL
TripAdvisor
TRIP
$1.57B
| $182K | 0.02% |
203
-460
| -69% | -$37.4K |
|
848
FMC
FMC
$1.46B
| $181K | 0.02% |
+3,977
| New | +$198K |
|
849
PUT
Herc Holdings
HRI
$5.45B
| $181K | 0.02% |
99
-101
| -51% | -$6.24K |
|
850
iShares International Select Dividend ETF
IDV
$8.23B
| $181K | 0.02% |
5,618
+5,513
| +5,250% | +$190K |
|
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.