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 | Miscellaneous | 41.66% |
| 2 | Communication Services | 14.46% |
| 3 | Technology | 10.46% |
| 4 | Healthcare | 8.18% |
| 5 | Consumer Discretionary | 6.37% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
676
CALL
Microsoft
MSFT
$3.71T
| $258K | 0.02% |
1,034
+292
| +39% | +$13.3K |
|
677
CALL
ProShares UltraShort Industrials
SIJ
$6.24M
| $258K | 0.02% |
36
-25
| -41% | -$15.9K |
|
678
CALL
Advance Auto Parts
AAP
$2.67B
| $257K | 0.02% |
114
+43
| +61% | +$6.57K |
|
679
AerCap
AER
$22.9B
| $257K | 0.02% |
+5,630
| New | +$267K |
|
680
Ambarella
AMBA
$2.78B
| $257K | 0.02% |
2,512
-3,528
| -58% | -$308K |
|
681
Dollar Tree
DLTR
$24.7B
| $257K | 0.02% |
+3,256
| New | +$257K |
|
682
PUT
Molson Coors Class B
TAP
$7.55B
| $257K | 0.02% |
424
+125
| +42% | +$9.29K |
|
683
Direxion Daily Real Estate Bull 3X ETF
DRN
$40.6M
| $256K | 0.02% |
+16,620
| New | +$309K |
|
|
X
684
DELISTED
US Steel
X
| $255K | 0.02% |
+12,394
| New | +$304K |
|
685
Kimberly-Clark
KMB
$34.9B
| $254K | 0.02% |
2,400
-797
| -25% | -$86.8K |
|
686
Travelers Companies
TRV
$77B
| $254K | 0.02% |
2,632
-6,266
| -70% | -$642K |
|
|
EMC
687
DELISTED
EMC CORPORATION
EMC
| $254K | 0.02% |
9,637
-34,187
| -78% | -$912K |
|
688
Freeport-McMoran
FCX
$104B
| $251K | 0.02% |
13,512
-31,466
| -70% | -$650K |
|
689
CALL
United Parcel Service
UPS
$87B
| $251K | 0.02% |
644
+413
| +179% | +$41K |
|
|
NE
690
PUT
DELISTED
Noble Corporation
NE
| $251K | 0.02% |
599
+188
| +46% | +$3.1K |
|
691
Oneok
OKE
$60.2B
| $250K | 0.02% |
6,338
-6,000
| -49% | -$266K |
|
692
AGNC Investment
AGNC
$12.6B
| $249K | 0.02% |
13,590
+7,847
| +137% | +$162K |
|
|
ADXS
693
DELISTED
Advaxis Inc
ADXS
| $249K | 0.02% |
+819
| New | +$259K |
|
694
Core Laboratories
CLB
$575M
| $248K | 0.02% |
2,176
+224
| +11% | +$27.2K |
|
695
HP
HPQ
$29.4B
| $248K | 0.02% |
18,244
-33,899
| -65% | -$503K |
|
696
Wheaton Precious Metals
WPM
$70.4B
| $248K | 0.02% |
14,308
-15,769
| -52% | -$303K |
|
|
TCO
697
DELISTED
Taubman Centers Inc.
TCO
| $248K | 0.02% |
+3,579
| New | +$265K |
|
|
LINE
698
PUT
DELISTED
LINN ENERGY LLC COM UTS REP LTD LIABILITY CO INTS
LINE
| $248K | 0.02% |
176
+26
| +17% | +$304 |
|
|
HES
699
PUT
DELISTED
Hess
HES
| $247K | 0.02% |
171
-201
| -54% | -$14.3K |
|
700
PUT
PTC Therapeutics
PTCT
$5.78B
| $247K | 0.02% |
167
+114
| +215% | +$6.65K |
|
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 $285M of net new capital in Q2 2015, opening 1,607 new positions and adding to 1,827 existing holdings. Its largest new stake was IBM: 85,948 shares worth $13.4M.
By sector, the portfolio is most concentrated in Miscellaneous at 42% of assets, down from 50% a quarter earlier, followed by Communication Services and Technology.
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.