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 | |
|---|---|---|---|---|---|---|
2901
Ethan Allen Interiors
ETD
$588M
| $12K | ﹤0.01% |
468
+321
| +218% | +$8.29K |
|
2902
Evercore
EVR
$13B
| $12K | ﹤0.01% |
+239
| New | +$12.2K |
|
2903
CALL
Factset
FDS
$9.56B
| $12K | ﹤0.01% |
+32
| New | +$5.2K |
|
2904
PUT
Hecla Mining
HL
$10.1B
| $12K | ﹤0.01% |
50
-10
| -17% | -$31 |
|
2905
CALL
Icahn Enterprises
IEP
$5.17B
| $12K | ﹤0.01% |
9
-8
| -47% | -$721 |
|
2906
Inogen
INGN
$172M
| $12K | ﹤0.01% |
+271
| New | +$10.4K |
|
2907
CALL
Inovio Pharmaceuticals
INO
$81.2M
| $12K | ﹤0.01% |
15
+8
| +114% | +$855 |
|
2908
PUT
Intuit
INTU
$84.2B
| $12K | ﹤0.01% |
27
-1
| -4% | -$102 |
|
2909
Jacobs Solutions
J
$15.9B
| $12K | ﹤0.01% |
+382
| New | +$14K |
|
|
K
2910
PUT
DELISTED
Kellanova
K
| $12K | ﹤0.01% |
24
-4
| -14% | -$239 |
|
2911
PUT
Lamar Advertising Co
LAMR
$16.4B
| $12K | ﹤0.01% |
+10
| New | +$595 |
|
2912
PUT
MGM Resorts International
MGM
$11.9B
| $12K | ﹤0.01% |
136
-224
| -62% | -$4.55K |
|
2913
PUT
Markel Group
MKL
$25.2B
| $12K | ﹤0.01% |
27
+22
| +440% | +$17.1K |
|
2914
CALL
Merit Medical Systems
MMSI
$4.54B
| $12K | ﹤0.01% |
+42
| New | +$853 |
|
2915
PUT
Matador Resources
MTDR
$6.11B
| $12K | ﹤0.01% |
65
+59
| +983% | +$1.58K |
|
2916
CALL
Nektar Therapeutics
NKTR
$2.4B
| $12K | ﹤0.01% |
13
+8
| +160% | +$1.38K |
|
|
NOAH
2917
CALL
Noah Holdings
NOAH
$597M
| $12K | ﹤0.01% |
21
-8
| -28% | -$259 |
|
2918
NETGEAR
NTGR
$666M
| $12K | ﹤0.01% |
+418
| New | +$13.1K |
|
2919
PUT
NVIDIA
NVDA
$4.78T
| $12K | ﹤0.01% |
2,040
+1,520
| +292% | +$824 |
|
2920
Ovintiv
OVV
$17B
| $12K | ﹤0.01% |
235
+24
| +11% | +$1.53K |
|
2921
Penske Automotive Group
PAG
$14.2B
| $12K | ﹤0.01% |
+240
| New | +$12.4K |
|
2922
CALL
Pfizer
PFE
$142B
| $12K | ﹤0.01% |
463
-488
| -51% | -$15.9K |
|
2923
PUT
Pilgrim's Pride
PPC
$6.98B
| $12K | ﹤0.01% |
54
-93
| -63% | -$2.3K |
|
2924
PUT
SunCoke Energy
SXC
$753M
| $12K | ﹤0.01% |
+63
| New | +$992 |
|
2925
PUT
Alaunos Therapeutics
TCRT
$4.71M
| $12K | ﹤0.01% |
3
+2
| +200% | +$3.1K |
|
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.