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 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2526
PUT
Chemours
CC
$2.59B
| $1.45M | ﹤0.01% |
64,200
-74,000
| -54% | -$1.94M |
|
2527
CALL
ATI
ATI
$27B
| $1.45M | ﹤0.01% |
26,100
-12,100
| -32% | -$678K |
|
2528
PUT
Opko Health
OPK
$921M
| $1.45M | ﹤0.01% |
1,156,100
+715,200
| +162% | +$927K |
|
2529
PUT
Sempra
SRE
$60.8B
| $1.45M | ﹤0.01% |
19,000
-55,800
| -75% | -$4.12M |
|
2530
CALL
Transmedics
TMDX
$2.5B
| $1.45M | ﹤0.01% |
9,600
-12,500
| -57% | -$1.5M |
|
2531
CALL
Costamare
CMRE
$1.9B
| $1.44M | ﹤0.01% |
87,900
+16,000
| +22% | +$219K |
|
2532
PUT
Leidos
LDOS
$14.1B
| $1.44M | ﹤0.01% |
9,900
+3,900
| +65% | +$545K |
|
2533
SM Energy
SM
$7.96B
| $1.44M | ﹤0.01% |
33,411
-15,059
| -31% | -$739K |
|
2534
WisdomTree Japan Hedged Equity Fund
DXJ
$7.23B
| $1.44M | ﹤0.01% |
12,796
+788
| +7% | +$85.6K |
|
2535
PUT
Repligen
RGEN
$7.44B
| $1.44M | ﹤0.01% |
11,400
+9,400
| +470% | +$1.47M |
|
2536
RingCentral
RNG
$4.05B
| $1.44M | ﹤0.01% |
50,963
+23,128
| +83% | +$744K |
|
2537
CALL
Baxter International
BAX
$11.6B
| $1.44M | ﹤0.01% |
42,900
-69,200
| -62% | -$2.55M |
|
2538
PUT
Crown Holdings
CCK
$12.8B
| $1.44M | ﹤0.01% |
19,300
-21,600
| -53% | -$1.74M |
|
2539
CALL
Children's Place
PLCE
$53.6M
| $1.44M | ﹤0.01% |
176,400
+138,000
| +359% | +$1.31M |
|
2540
CALL
Cullen/Frost Bankers
CFR
$10.3B
| $1.43M | ﹤0.01% |
14,100
+1,400
| +11% | +$147K |
|
2541
CALL
Liquidia Corp
LQDA
$7.67B
| $1.43M | ﹤0.01% |
119,300
-14,600
| -11% | -$194K |
|
2542
CALL
LKQ Corp
LKQ
$6.58B
| $1.43M | ﹤0.01% |
34,400
+10,400
| +43% | +$465K |
|
2543
VanEck Agribusiness ETF
MOO
$989M
| $1.43M | ﹤0.01% |
20,343
+17,694
| +668% | +$1.28M |
|
2544
PUT
MannKind Corp
MNKD
$1.28B
| $1.42M | ﹤0.01% |
272,900
-19,500
| -7% | -$88.5K |
|
2545
CALL
United Natural Foods
UNFI
$3.01B
| $1.42M | ﹤0.01% |
108,400
-25,600
| -19% | -$288K |
|
2546
TeraWulf
WULF
$9.15B
| $1.42M | ﹤0.01% |
319,034
+205,916
| +182% | +$556K |
|
2547
The Mosaic Company
MOS
$7.09B
| $1.42M | ﹤0.01% |
+49,036
| New | +$1.48M |
|
2548
PUT
Nasdaq
NDAQ
$51.5B
| $1.42M | ﹤0.01% |
23,500
-5,100
| -18% | -$309K |
|
2549
CALL
Flowserve
FLS
$9.25B
| $1.41M | ﹤0.01% |
29,400
+3,000
| +11% | +$144K |
|
2550
CALL
SBA Communications
SBAC
$18.4B
| $1.41M | ﹤0.01% |
7,200
-12,200
| -63% | -$2.41M |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.