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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
FOLD
3501
PUT
DELISTED
Amicus Therapeutics
FOLD
| $695K | ﹤0.01% |
59,000
-93,300
| -61% | -$1.19M |
|
3502
CALL
National CineMedia
NCMI
$371M
| $695K | ﹤0.01% |
135,000
+108,500
| +409% | +$462K |
|
3503
CALL
NextDecade
NEXT
$1.63B
| $695K | ﹤0.01% |
122,400
-78,800
| -39% | -$394K |
|
3504
Banc of California
BANC
$3.27B
| $693K | ﹤0.01% |
45,586
+31,933
| +234% | +$444K |
|
3505
PUT
Qfin Holdings
QFIN
$1.66B
| $691K | ﹤0.01% |
37,500
+27,100
| +261% | +$425K |
|
|
TWO
3506
CALL
Two Harbors Investment
TWO
$1.27B
| $691K | ﹤0.01% |
52,200
-775,400
| -94% | -$10.1M |
|
3507
PUT
Watsco Inc
WSO
$15.1B
| $691K | ﹤0.01% |
1,600
-1,800
| -53% | -$723K |
|
3508
National Fuel Gas
NFG
$7.73B
| $690K | ﹤0.01% |
+12,856
| New | +$636K |
|
|
AIOT
3509
PowerFleet Inc
AIOT
$525M
| $688K | ﹤0.01% |
128,848
+123,379
| +2,256% | +$418K |
|
|
SII
3510
PUT
Sprott
SII
$2.73B
| $687K | ﹤0.01% |
18,600
-5,800
| -24% | -$208K |
|
|
UDMY
3511
CALL
DELISTED
Udemy
UDMY
| $687K | ﹤0.01% |
62,600
+59,900
| +2,219% | +$744K |
|
3512
Dover
DOV
$27.4B
| $686K | ﹤0.01% |
+3,875
| New | +$624K |
|
3513
NexGen Energy
NXE
$6.08B
| $685K | ﹤0.01% |
88,270
-37,906
| -30% | -$281K |
|
3514
PUT
RB Global
RBA
$21.7B
| $685K | ﹤0.01% |
9,000
+5,300
| +143% | +$370K |
|
3515
PUT
Ero Copper
ERO
$2.67B
| $684K | ﹤0.01% |
35,500
-4,000
| -10% | -$66K |
|
3516
CoreCivic
CXW
$3.03B
| $682K | ﹤0.01% |
43,745
-122,859
| -74% | -$1.79M |
|
3517
PUT
IMAX
IMAX
$2.59B
| $682K | ﹤0.01% |
42,200
+41,700
| +8,340% | +$634K |
|
3518
PUT
Kinsale Capital Group
KNSL
$8.43B
| $682K | ﹤0.01% |
1,300
-700
| -35% | -$316K |
|
3519
PUT
Olin
OLN
$2.44B
| $682K | ﹤0.01% |
11,600
-70,700
| -86% | -$3.79M |
|
|
LOGC
3520
DELISTED
ContextLogic
LOGC
| $682K | ﹤0.01% |
120,020
+115,690
| +2,672% | +$637K |
|
3521
CALL
Ormat Technologies
ORA
$6.05B
| $681K | ﹤0.01% |
10,300
+3,600
| +54% | +$240K |
|
3522
CALL
GoodRx Holdings
GDRX
$1.06B
| $680K | ﹤0.01% |
95,800
+73,100
| +322% | +$484K |
|
3523
CALL
Fidelity National Financial
FNF
$14.6B
| $679K | ﹤0.01% |
12,800
+600
| +5% | +$30.2K |
|
3524
TAL Education Group
TAL
$5.79B
| $677K | ﹤0.01% |
59,700
-42,661
| -42% | -$531K |
|
3525
Chefs' Warehouse
CHEF
$4.09B
| $676K | ﹤0.01% |
17,968
+378
| +2% | +$12.9K |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.