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 | |
|---|---|---|---|---|---|---|
626
Scholastic
SCHL
$856M
| $281K | 0.02% |
6,369
+6,331
| +16,661% | +$272K |
|
627
PUT
Morgan Stanley
MS
$343B
| $280K | 0.02% |
516
-190
| -27% | -$7.23K |
|
628
Stanley Black & Decker
SWK
$13.9B
| $279K | 0.02% |
2,658
-5,070
| -66% | -$517K |
|
629
PUT
United Rentals
URI
$64.8B
| $279K | 0.02% |
304
+7
| +2% | +$670 |
|
630
CALL
Macy's
M
$6.4B
| $278K | 0.02% |
370
-10
| -3% | -$676 |
|
631
State Street Consumer Staples Select Sector SPDR ETF
XLP
$14.2B
| $278K | 0.02% |
5,842
+3,033
| +108% | +$148K |
|
632
CALL
ExxonMobil
XOM
$640B
| $278K | 0.02% |
2,418
-60
| -2% | -$5.16K |
|
|
SNR
633
DELISTED
NEW SENIOR INVESTMENT GROUP INC.
SNR
| $278K | 0.02% |
+20,802
| New | +$330K |
|
634
CALL
Costco
COST
$411B
| $277K | 0.02% |
884
+333
| +60% | +$47.9K |
|
635
Precigen
PGEN
$1.9B
| $277K | 0.02% |
+5,731
| New | +$242K |
|
|
CBM
636
DELISTED
Cambrex Corporation
CBM
| $277K | 0.02% |
6,324
-563
| -8% | -$23.3K |
|
|
RCPT
637
CALL
DELISTED
RECEPTOS INC COM STK (DE)
RCPT
| $277K | 0.02% |
87
+21
| +32% | +$3.47K |
|
638
Sprouts Farmers Market
SFM
$6.95B
| $276K | 0.02% |
10,258
-370
| -3% | -$11.4K |
|
639
Aflac
AFL
$62.9B
| $275K | 0.02% |
+8,852
| New | +$280K |
|
640
PUT
YPF
YPF
$20.6B
| $275K | 0.02% |
543
+419
| +338% | +$12.2K |
|
|
LUMO
641
CALL
DELISTED
Lumos Pharma, Inc. Common Stock
LUMO
| $275K | 0.02% |
39
+1
| +3% | +$425 |
|
|
LL
642
DELISTED
LL Flooring Holdings, Inc.
LL
| $275K | 0.02% |
+13,312
| New | +$350K |
|
643
Direxion Daily MSCI Emerging Markets Bull 3X ETF
EDC
$158M
| $274K | 0.02% |
3,011
+1,609
| +115% | +$172K |
|
644
Canadian National Railway
CNI
$77.6B
| $273K | 0.02% |
4,742
+4,238
| +841% | +$265K |
|
645
PUT
Kimberly-Clark
KMB
$36.1B
| $273K | 0.02% |
392
+280
| +250% | +$30.5K |
|
646
Sarepta Therapeutics
SRPT
$1.67B
| $273K | 0.02% |
8,998
-9,580
| -52% | -$196K |
|
647
CALL
JPMorgan Chase
JPM
$926B
| $272K | 0.02% |
929
-1,375
| -60% | -$89.8K |
|
648
El Pollo Loco
LOCO
$482M
| $272K | 0.02% |
13,161
+10,346
| +368% | +$251K |
|
649
PUT
Invesco CurrencyShares Euro Currency Trust
FXE
$332M
| $270K | 0.02% |
1,433
-912
| -39% | -$99.2K |
|
650
NiSource
NI
$22.3B
| $270K | 0.02% |
15,125
+1,461
| +11% | +$26K |
|
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.