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 | |
|---|---|---|---|---|---|---|
801
PUT
ResMed
RMD
$27.7B
| $198K | 0.02% |
229
+215
| +1,536% | +$13.6K |
|
|
WPRT
802
PUT
Westport Fuel Systems
WPRT
$35.7M
| $198K | 0.02% |
22
-3
| -12% | -$151 |
|
803
Dollar General
DG
$25.4B
| $197K | 0.02% |
+2,537
| New | +$191K |
|
804
Magna International
MGA
$17.9B
| $197K | 0.02% |
+3,525
| New | +$196K |
|
805
PUT
Nu Skin
NUS
$247M
| $197K | 0.02% |
264
-62
| -19% | -$3.35K |
|
|
POZN
806
DELISTED
POZEN INC
POZN
| $197K | 0.02% |
19,110
+12,439
| +186% | +$102K |
|
807
Chord Energy
CHRD
$7.81B
| $196K | 0.02% |
12,386
+6,530
| +112% | +$110K |
|
808
PUT
Diageo
DEO
$45.7B
| $196K | 0.02% |
261
+108
| +71% | +$12.3K |
|
809
PUT
Vodafone
VOD
$35.1B
| $196K | 0.02% |
131
-151
| -54% | -$5.44K |
|
|
ESPR
810
CALL
DELISTED
Esperion Therapeutics
ESPR
| $195K | 0.02% |
102
-118
| -54% | -$11.6K |
|
811
H&R Block
HRB
$5.05B
| $194K | 0.02% |
6,576
-2,843
| -30% | -$89.2K |
|
|
RRMS
812
DELISTED
ROSE ROCK MIDSTREAM L P COM UNIT REPSTG LTD (DE)
RRMS
| $194K | 0.02% |
4,171
+162
| +4% | +$8.06K |
|
813
CALL
Caterpillar
CAT
$412B
| $193K | 0.02% |
599
-688
| -53% | -$59.2K |
|
|
HOUS
814
DELISTED
Anywhere Real Estate
HOUS
| $193K | 0.02% |
4,148
-3,730
| -47% | -$173K |
|
|
MNK
815
CALL
DELISTED
MALLINCKRODT PUBLIC LIMITED COMPANY
MNK
| $193K | 0.02% |
92
-46
| -33% | -$5.67K |
|
816
PUT
Consolidated Edison
ED
$41.5B
| $192K | 0.02% |
270
-109
| -29% | -$6.58K |
|
817
PUT
Valero Energy
VLO
$90.6B
| $192K | 0.02% |
277
-145
| -34% | -$8.56K |
|
|
BHI
818
CALL
DELISTED
Baker Hughes
BHI
| $192K | 0.02% |
414
-135
| -25% | -$8.83K |
|
819
PUT
American Tower
AMT
$76.5B
| $190K | 0.02% |
364
+191
| +110% | +$18.1K |
|
820
PUT
Broadcom
AVGO
$1.86T
| $190K | 0.02% |
3,260
-1,090
| -25% | -$14.3K |
|
821
CALL
FedEx
FDX
$74.6B
| $190K | 0.02% |
321
+149
| +87% | +$25.9K |
|
|
SAGE
822
DELISTED
Sage Therapeutics
SAGE
| $190K | 0.02% |
+2,606
| New | +$168K |
|
|
VMW
823
PUT
DELISTED
VMware, Inc
VMW
| $190K | 0.02% |
502
+239
| +91% | +$20.8K |
|
|
ALTR
824
CALL
DELISTED
Altera Corp
ALTR
| $190K | 0.02% |
2,495
+1,746
| +233% | +$81.4K |
|
825
CALL
VanEck Gold Miners ETF
GDX
$22.9B
| $188K | 0.02% |
1,071
-556
| -34% | -$10.8K |
|
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.